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>> [Music kucheza]

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>> ANDI PENG: Hii ni CS50, na
kuwakaribisha kwa wiki mbili za sehemu.

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Hii ni kweli wakati wiki
wawili wa class-- yetu kweli,

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00:00:11,740 --> 00:00:14,550
wiki ya kwanza tulikuwa na sehemu.

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Show ya mikono, jinsi wengi wenu zote
alikuja sehemu super wiki iliyopita?

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OK, hiyo ni sawa.

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00:00:19,480 --> 00:00:20,020
Hiyo ni sawa.

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Ni wangapi wenu watched
kifungu cha super wiki iliyopita?

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SAWA.

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Na nyie alifanya faini
juu ya tatizo kuweka moja?

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Hivyo nina kwenda kuchukua ni kwamba tuna
rundo la kweli akili ya watoto

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katika darasa hili na mambo itakuwa vizuri.

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SAWA.

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Hivyo first--

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>> Kwanza, tunakwenda tu kwa ufupi
kwenda juu ya ajenda kwa leo.

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Tutaweza majadiliano juu ya kozi za usafirishaji.

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Mengi ya pengine
una maswali kuhusu

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jinsi mambo kukimbia katika kozi hii.

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Tutaweza kujibu yao.

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Tunakwenda kwa ufupi
kwenda juu mizunguko katika kesi

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yoyote ya nyie amekosa sehemu super.

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Tutaweza majadiliano juu ya ramani ASCII.

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Tutaweza majadiliano juu ya arrays,
kazi, hoja mstari amri.

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Na hatimaye, nini nyie pengine wote
kweli unataka kuwa hapa kujifunza kuhusu,

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ni pset2 yako.

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Kutakuwa na baadhi ya mbinu nzuri
na tips kwa jinsi ya kufanya hivyo.

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00:01:04,209 --> 00:01:07,910

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>> SAWA.

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Pia, pili, tuna
kura ya pipi hapa.

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Mtu yeyote ambaye anapenda pipi,
tu kuja hapa.

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Kunyakua baadhi.

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Nina rundo.

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Tuna tani katika ofisi.

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Mimi si kweli wanataka
kula pipi siku zote.

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Nyie lazima kula pipi wote,
kwa sababu mimi kuletwa hapa kwa nyie.

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Tu kula pipi.

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Kutakuwa na pipi kila sehemu.

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>> Hivyo kwanza, mimi ni nani?

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Jina langu ni Andi Peng.

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Mimi ni kichwa TA wa CS50 hapa katika Yale.

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Na kwa kuongeza
kwamba, mimi pia be--

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kama mtu yeyote bila like-- mbio yako
buddy, bega yako kulia juu ya.

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Kama usiku kabla kutokana pset yako,
hawana wazo nini kinaendelea,

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hit me up.

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Tutaweza commiserate pamoja, na kadhalika.

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Tu kujua kwamba mimi niko hapa kama
rasilimali kwa ajili yenu kama mstari wa mbele

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katika kusaidia nyie kufikiri jinsi
kutatua matatizo katika CS50 na kwingineko.

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>> Email yangu ni andi.peng@yale.edu.

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Mimi itabidi pia kutuma nje ya mtu binafsi
email na simu yangu namba ndani yake

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hivyo kwamba si kila mtu juu ya
biashara unaweza kuona simu yangu idadi.

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Kujisikia huru simu yangu wakati wowote.

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Umakini, simu yangu ni
kawaida masharti ya mkono wangu.

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Siwezi kujibu
ndani ya dakika kadhaa.

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Siwezi kujibu ndani ya masaa kadhaa.

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Lakini Naweza kuthibitisha, ikiwa
wewe e-mail yangu, kama wewe simu yangu,

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Nakala mimi, mimi kujibu ndani ya masaa 24.

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Mara nyingi, mimi itabidi kujibu kabla
kwamba, kwa sababu mimi kuelewa

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kwamba kila mtu got baadhi ya matatizo,
na unataka majibu yako

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kujibiwa kwa haraka sana.

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>> Hata hivyo, kama wewe piga
mimi dakika 30 kabla

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kwamba kipande kwamba ni kutokana Alhamisi
night-- kuwa kama, Andi, nisaidie,

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Mimi si started-- nipate kuwapa
wewe kuwa bega kwa kilio juu.

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Lakini inaweza kuwa muda wa kufikiria kuhusu
jinsi ya kufanya hivyo wakati ujao.

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SAWA.

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Oops.

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Je, mimi kurudi nyuma?

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Kuna sisi kwenda.

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>> Hivyo katika kozi hii, tuna
tani ya msaada kwa ajili ya kila mtu.

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Mbali na tu
sehemu hapa, ambayo wewe

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kila wiki kupata kwa kutumia 90
Dakika ya ajabu na mimi,

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sisi pia kuwa masaa ya ofisi.

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Ni wangapi wenu guys kuwa tayari
wamekuwa na masaa ya ofisi kwa ajili ya kusaidia?

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Kubwa.

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Hiyo ni nzuri kwa kweli kuona, kwa sababu sisi
na wafanyakazi wa zaidi ya 45 TAS na CAS

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mafunzo kwa kozi hii kuwa ni hapa
kwa ajili ya kusaidia nyie na psets yako.

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>> Jumatatu wao ni uliofanyika katika TEAL
darasani katika 17 Hill House hapa

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katika Yale.

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Jumanne na Alhamisi,
re uliofanyika katika commons.

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8:00-11:00 pretty much kila wiki.

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Karibu, kutoka nje.

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Tatizo lolote, hakuna problem--
kuja juu tu katika,

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na kisha tutaweza kukusaidia nje na kwamba.

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>> Pili, pamoja na masaa ya ofisi
na sehemu, sisi pia kuwa kaptula.

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Kuna mtu yeyote milele kuonekana michache ya
kaptula au walkthroughs katika video

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kwenye tovuti?

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SAWA.

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Hivyo wao ni kweli, kweli kusaidia.

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Harvard yetu nzuri ya uzalishaji
timu zaidi ya hapo juu kwamba shule

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hadi kaskazini, wao zingine na zinazozalishwa
hizi ajabu walkthrough video.

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>> Wao itabidi kuchukua wewe hatua kwa hatua kupitia
jinsi ya kwenda juu ya kutatua tatizo.

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Mara nyingi, ikiwa ni kuchanganyikiwa kuhusu
dhana rahisi, dhana ya umoja,

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tuangalie, kwa sababu sisi pengine
mfupi juu ya mahali fulani kwenye tovuti yetu.

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Na ni kawaida rasilimali kubwa
kuangalia kwa wakati wewe ni wa kwanza

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waliopotea juu ya jinsi ya kushughulikia tatizo hilo.

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>> Tatu, sisi pia kuwa
study50 na reference50.

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00:04:09,750 --> 00:04:15,650
Hivyo kujifunza juu ya 50
tovuti ni tu kiungo.

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Ni, nadhani, study.cs50.net
au kitu kama hicho.

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Tu Google ni.

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Sisi wana kura ya slides tayari.

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Sisi wana kura ya kaptula na
mambo walkthroughs-- zote ulioandaliwa

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nzuri sana na nadhifu kwa nyie zote
kuvinjari kwa njia, angalia dhana yoyote

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kwamba wewe ni kuchanganyikiwa kuhusu.

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Ni d pengine kufunikwa
zaidi ya hapo katika study50.

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>> Reference50-- sawa.

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Tuna mengi ya maelezo mbalimbali
hazijapatikana kwa ajili ya ovyo wako.

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Na Mwisho, tuna nini
aitwaye CS50 Jadili,

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jukwaa ambalo, kama usiku kabla
unafanya matatizo yako, kusema,

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una swali.

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Kuingia kwenye CS50 Diskutera.

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Baada ya swali lako.

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Na kisha moja ya hundreds--
pengine, thousands-- wa rika

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kuchukua darasa hili online itakuwa kuingia katika.

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Na labda mtu anaweza kupata
jibu lako kabla TA can.

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Ni kimsingi tu
jukwaa online kwamba tunaweza zote

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kutumia ili kujadili matatizo yetu.

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Hiyo ni poa.

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>> SAWA.

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Hivyo tatizo seti.

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Sisi ni juu ya haki katika
nene ya tatizo kuweka mbili.

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Wengi wetu tayari
alijitahidi kuweka tatizo moja.

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Sisi tayari kujua kwamba labda kusubiri
kwa usiku wa mwisho wa kufanya pset yako

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si jambo smartest kufanya katika CS50.

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>> Tips na vidokezo kimsingi kwa
mafanikio ni kusoma spec nzima.

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Ni wangapi wenu tayari
kusoma spec kwa pset 2?

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SAWA.

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Hiyo ni kiasi imara.

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Najua nyie kuwa pengine kutambuliwa
na sasa specs ni kweli kwa muda mrefu.

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Wao ni kweli, kweli kwa muda mrefu.

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>> Ni kweli ni vigumu kusoma kila mstari
ya kwamba kwa makini neno kwa neno.

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Unataka tu skim kwa ambapo
anakwambia kufanya kitu fulani.

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Naweza kuthibitisha, si kufanya hivyo.

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Kama wewe kufanya hivyo, wewe pengine
kwenda miss mahali fulani

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ambako atakwambia
jinsi ya kuanza tatizo

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au anakwambia nini cha jina
tatizo lako au anakwambia,

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hii pengine ni njia bora
kuanza kufanya tatizo lako.

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Na kisha utasikia kupotea.

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>> Wakati kujaribu kusoma yako
spec nusu ya njia,

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mengi ya muhimu
information-- katika kwamba wewe si

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kwenda kuwa na uwezo wa kweli kupata.

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Hivyo kusoma spec nzima.

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Jaribu kusoma spec nzima
kabla ya kuja kwa sehemu,

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kwa sababu wakati huo, wakati sisi
majadiliano juu ya pset,

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sisi wote kuwa na wazo
ya nini kinaendelea.

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>> Pili, hii ni dhana
kwamba mimi itabidi kama rejea

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mengi katika mwenendo muhula.

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Lakini kimsingi, kukutana na sisi nusu, sawa?

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Mimi, kama TA yako na Jason kama kozi
meneja na Scaz kama profesa yako

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na Daudi kama profesa yako na wote wa
wengine TAS nzuri katika kozi hii,

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wasaidizi katika kozi hii hii
sisi kufanya kazi nzuri

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ili kuhakikisha kuwa wewe ni kuweka
hadi kufanikiwa katika kozi hii.

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Sisi itafanya sehemu.

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Sisi itafanya masaa ya ofisi.

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Sisi kujibu simu yako
wito, kujibu barua pepe yako,

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kufanya kila kitu tunaweza kufanya
uhakika maswali yako ni akajibu.

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>> Hata hivyo, kutusaidia nje pia.

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Kukutana na sisi nusu.

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Kama wewe kuja masaa ya ofisi
si alikwenda kwa sehemu, si

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baada ya kuona mihadhara, kutokuwa na
sijui nini kinaendelea, kuwa kama, nisaidie.

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Mimi nina kwenda kuwa kama, vizuri, mimi nina pole.

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Huenda wakati wa kutoa mikopo
kuwa bega kwa kilio juu,

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kwa sababu mimi nina uhakika
nini siwezi kufanya ili kukusaidia

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kama huna kujaribu angalau msaada
mwenyewe kidogo katika mwanzo.

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Kukutana na sisi nusu.

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Unajua, tafadhali kuja
tayari kujibu na kupata

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00:07:15,020 --> 00:07:16,353
tayari kushiriki katika nyenzo.

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00:07:16,353 --> 00:07:19,342
Ni hufanya mambo mengi
rahisi kwa kila mtu kushiriki.

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Yeah, hiyo ni pretty kiasi.

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>> Grading.

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00:07:23,720 --> 00:07:29,250
Kadhalika mtaala, ni pretty
kina kuhusu jinsi sisi daraja.

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Lakini kimsingi, kuvunjika
katika hili ni 50% ya daraja yako

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itakuwa psets, ambayo
ni nzuri, kwa sababu hiyo ni

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ambapo wewe ni matumizi makubwa
Wengi wa kozi muda wako juu.

176
00:07:37,400 --> 00:07:39,854
Quizzes 40%, na yako
mradi wa mwisho itakuwa 10%.

177
00:07:39,854 --> 00:07:42,520
Kutakuwa na mbili Quizzes katika
kozi ya muhula.

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00:07:42,520 --> 00:07:47,050
Nadhani nyakati na majira ni
pia waliotajwa kwenye mtaala.

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>> Njia ambayo sisi
kuwa grading psets yako

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ni kwamba tuna kimsingi nne
maadili ambayo sisi kuwapa ya kila daraja.

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Tuna thamani ya wigo,
usahihi, kubuni, na style.

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Hivyo kama unaweza kuona, hiyo ni aina ya yetu
fomula kwa ajili ya kuhesabu psets.

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00:08:01,530 --> 00:08:03,640
Tatu tunatoa zaidi
uzito kwa usahihi,

184
00:08:03,640 --> 00:08:06,140
sababu ni wazi kocha yako
lazima kupima kwa kesi

185
00:08:06,140 --> 00:08:08,480
kwamba tunataka mtihani kwa.

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00:08:08,480 --> 00:08:11,000
>> Nyie wote wana
check50 ovyo wako.

187
00:08:11,000 --> 00:08:13,730
Ni kazi muhimu sana
kwamba nyie Unaweza zote

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00:08:13,730 --> 00:08:17,560
kupakia kanuni yako kwa server yetu,
ambapo sisi kuangalia ni kwa ajili yenu.

189
00:08:17,560 --> 00:08:20,800
Na wameweza kuona wale
nyuso frowny, nyuso smiley.

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00:08:20,800 --> 00:08:22,119
Wao ni kweli, kweli kusaidia.

191
00:08:22,119 --> 00:08:23,910
Tafadhali usiwe
mwanafunzi kuwa kama inajaribu

192
00:08:23,910 --> 00:08:26,230
kwa Hardcode katika majibu yote kwa wao.

193
00:08:26,230 --> 00:08:30,050
Nimekuwa dhahiri kuonekana pset ambapo
mtu aliona maadili yote ya check50

194
00:08:30,050 --> 00:08:33,429
na wao kwa bidii tu kutolewa in-- kama
idadi hii, magazeti nje idadi hii.

195
00:08:33,429 --> 00:08:35,080
Kama idadi hiyo, magazeti nje idadi hiyo.

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00:08:35,080 --> 00:08:36,090
Je, si kufanya hivyo.

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00:08:36,090 --> 00:08:39,360
>> Japokuwa kitaalam
check50 ni sahihi,

198
00:08:39,360 --> 00:08:41,809
njia yako ya kutatua
Tatizo siyo sahihi.

199
00:08:41,809 --> 00:08:45,770
Hivyo tu kutumia check50 haba.

200
00:08:45,770 --> 00:08:48,497
Lakini pia kuhakikisha kuwa wewe
kuelewa ni jinsi gani kazi,

201
00:08:48,497 --> 00:08:50,580
Mpango ni kazi
pamoja na check50,

202
00:08:50,580 --> 00:08:53,120
kwa sababu hatuwezi mtihani kila
Inawezekana kesi ya check50.

203
00:08:53,120 --> 00:08:55,440
Tutaweza kuwa kupima baadhi yao.

204
00:08:55,440 --> 00:09:00,390
>> Mtindo huo ni kimsingi, jinsi
pamoja iliyoundwa ni kanuni yako?

205
00:09:00,390 --> 00:09:04,150
Kama wewe ni nakala-pasting nyingi
mstari wa kanuni mara nyingi sana.

206
00:09:04,150 --> 00:09:06,960
Labda huna kabisa
kubuni bora katika kanuni yako.

207
00:09:06,960 --> 00:09:09,470
Labda ni wakati wa kuongeza kuwa kitanzi.

208
00:09:09,470 --> 00:09:12,090
Kimsingi, hapa ni tu zote
kuhusu kujaribu kufanya kanuni yako,

209
00:09:12,090 --> 00:09:17,010
kujaribu kuandika kanuni yako kama ufanisi
iwezekanavyo ili anaendesha mpango wako

210
00:09:17,010 --> 00:09:19,630
haraka iwezekanavyo.

211
00:09:19,630 --> 00:09:20,996
>> Mwisho, tuna style.

212
00:09:20,996 --> 00:09:24,360
Hivyo mtindo ni aina ya
kiholela, lenyewe mrefu.

213
00:09:24,360 --> 00:09:27,470
Najua sisi ni rasmi na
mwongozo style 50 kwa CS50,

214
00:09:27,470 --> 00:09:30,050
ambako atakwambia, loo, wewe
wanapaswa kuwa na nafasi hapa.

215
00:09:30,050 --> 00:09:32,220
Unapaswa aina ya format
kanuni yako kwa njia hii.

216
00:09:32,220 --> 00:09:34,070
Unapaswa kutaja mambo kwa njia hii.

217
00:09:34,070 --> 00:09:38,180
>> Mimi si kweli huduma, per se, jinsi
kuchagua style kanuni yako,

218
00:09:38,180 --> 00:09:39,840
tu kwa muda mrefu kama wewe kukaa thabiti.

219
00:09:39,840 --> 00:09:43,732
Kwa mfano, kama wewe kama
kuacha nafasi baada ya nne yako

220
00:09:43,732 --> 00:09:45,690
kabla yako kitanzi nne,
tu kufanya hivyo kila wakati.

221
00:09:45,690 --> 00:09:46,523
Je, si aina ya kufanya hivyo.

222
00:09:46,523 --> 00:09:47,730
Je, kufanya hivyo nyakati nyingine.

223
00:09:47,730 --> 00:09:51,046
Kama wewe kama kuweka curly
braces nafasi njia fulani,

224
00:09:51,046 --> 00:09:52,170
tu daima kufanya hivyo.

225
00:09:52,170 --> 00:09:54,628
Je, si aina ya kufanya hivyo mahali fulani
hapa na mahali fulani si huko.

226
00:09:54,628 --> 00:09:57,010
Wakati sisi ni grading,
kwa hakika ni vigumu

227
00:09:57,010 --> 00:09:59,420
kama mimi hawana wazo jinsi
wewe ni formatting kanuni yako,

228
00:09:59,420 --> 00:10:02,064
mambo ni wacky na nje ya mahali.

229
00:10:02,064 --> 00:10:04,980
Kama wewe tu kushika ni thabiti, ni
rahisi sana kwa mimi kama mkuu

230
00:10:04,980 --> 00:10:06,310
kuwa na uwezo wa kusoma kanuni yako.

231
00:10:06,310 --> 00:10:09,393
Ni rahisi sana kwa wewe kama mwanafunzi
kuwa na uwezo wa kuangalia njia ya kanuni yako

232
00:10:09,393 --> 00:10:11,720
na kuona nini mbaya na
ni kufyeka nini kuna masuala.

233
00:10:11,720 --> 00:10:15,740
Style ni moja ya mambo rahisi
nyie wanaweza kufanya ili kupata alama kamili.

234
00:10:15,740 --> 00:10:18,770
Kimsingi, kama wewe tu huduma, ikiwa
kulipa dakika tano ya tahadhari

235
00:10:18,770 --> 00:10:22,760
na kanuni yako kila wiki, unapaswa
kuwa kupata pointi kamili style.

236
00:10:22,760 --> 00:10:26,020
>> Mwisho, tuna kile kinachoitwa
multiplier ya wigo.

237
00:10:26,020 --> 00:10:28,890
Scope-- Najua ni kubwa
neno, hasa katika darasa hili.

238
00:10:28,890 --> 00:10:31,030
Lakini upeo, njia kwamba wote
ni kwamba wewe ni kujaribu

239
00:10:31,030 --> 00:10:33,670
psets kwa kadri ya uwezo wako.

240
00:10:33,670 --> 00:10:37,180
Kama kurejea katika tatu kati
ya yako matatizo nne

241
00:10:37,180 --> 00:10:39,460
na wala hata jaribio
mwisho moja, wewe pengine

242
00:10:39,460 --> 00:10:41,630
kwenda kupoteza pointi baadhi ya wigo.

243
00:10:41,630 --> 00:10:44,560
>> Hata kama wewe tu kuanza tatizo,
kufanya bora yako ya kutembea kwa njia hiyo.

244
00:10:44,560 --> 00:10:47,691
Hata kama hana kazi, kurejea katika,
kwa sababu hiyo inaonyesha na inaonyesha

245
00:10:47,691 --> 00:10:50,190
kwetu kwamba wewe ni kujaribu, kwamba
wewe alijaribu kuweka tatizo

246
00:10:50,190 --> 00:10:51,430
kwa kadri ya uwezo wako.

247
00:10:51,430 --> 00:10:53,800
Na kisha tunaweza kukupa
pointi kamili kwa upeo.

248
00:10:53,800 --> 00:10:58,715
>> Wigo ni muhimu sana kwa wakati sisi pia
majadiliano juu ya chini pset alama kushuka.

249
00:10:58,715 --> 00:11:02,010
Hivyo katika kipindi cha
muhula, nyie na psets tisa.

250
00:11:02,010 --> 00:11:05,340
Na sisi kwa kweli kuacha
alama ya chini nje ya wale tisa,

251
00:11:05,340 --> 00:11:07,670
lakini kama tu una pointi full wigo.

252
00:11:07,670 --> 00:11:11,120
>> Hivyo kama wewe kugeuka katika pset pungufu,
kwa bahati mbaya, hatuwezi kuacha kwamba mmoja,

253
00:11:11,120 --> 00:11:13,540
kwa sababu upeo wako
pointi walikuwa si kukamilika.

254
00:11:13,540 --> 00:11:16,570
Hivyo hata kama una wiki kubwa
ambapo wewe ni kufa na wewe ni mgonjwa

255
00:11:16,570 --> 00:11:20,040
au mbwa wako akifa, paka wako akifa,
na wewe ni overloaded na kazi za nyumbani,

256
00:11:20,040 --> 00:11:21,074
kujaribu tu pset.

257
00:11:21,074 --> 00:11:22,490
Kufanya hivyo kwa kadri ya uwezo wako.

258
00:11:22,490 --> 00:11:23,840
Kama haifanyi kazi, haijalishi.

259
00:11:23,840 --> 00:11:24,506
Tu kugeuka kuwa katika.

260
00:11:24,506 --> 00:11:26,590
Angalau tunaweza kutoa
wewe pointi kwa juhudi.

261
00:11:26,590 --> 00:11:28,510
>> A kwa juhudi katika darasa hili.

262
00:11:28,510 --> 00:11:30,170
Kwa uchache chini ya alama kushuka kwa juhudi.

263
00:11:30,170 --> 00:11:32,354
Hivyo yeah.

264
00:11:32,354 --> 00:11:33,270
Hiyo ni pretty kiasi.

265
00:11:33,270 --> 00:11:36,521
Je, mtu yeyote una maswali hivyo
mbali juu ya jinsi sisi Daraja darasani?

266
00:11:36,521 --> 00:11:37,187
Au kimojawapo cha vitu hivi?

267
00:11:37,187 --> 00:11:41,220
Kimojawapo cha vitu hivi ili far--
sehemu, masaa ya ofisi?

268
00:11:41,220 --> 00:11:41,720
Baridi.

269
00:11:41,720 --> 00:11:46,720

270
00:11:46,720 --> 00:11:47,800
SAWA.

271
00:11:47,800 --> 00:11:51,260
>> Hivyo hii ni somo kwamba hakuna
mtu kweli anapenda kuzungumzia.

272
00:11:51,260 --> 00:11:53,084
Mimi si kweli kama kuzungumza kuhusu suala hilo.

273
00:11:53,084 --> 00:11:55,250
Nyie si kweli unataka
kusikia mimi kuzungumza kuhusu suala hilo.

274
00:11:55,250 --> 00:11:57,690
Lakini kwa bahati mbaya, sisi wote
na kuzungumza kuhusu suala hilo.

275
00:11:57,690 --> 00:12:00,110
Daudi alitumia muda wa dakika 20
hotuba kuzungumza kuhusu suala hilo.

276
00:12:00,110 --> 00:12:02,580
Na kwamba ni chini
ya uaminifu kitaaluma.

277
00:12:02,580 --> 00:12:08,110
>> Hivyo sisi wote hapa kuwa pengine imeandikwa
insha wakati mwingine katika kazi yetu Yale.

278
00:12:08,110 --> 00:12:11,800
Tumekuwa pengine wamezipata majadiliano ambapo tumekuwa
ameambiwa na si plagiarize insha zetu,

279
00:12:11,800 --> 00:12:13,940
kwa sababu kazi hiyo ni siyo yetu.

280
00:12:13,940 --> 00:12:18,109
Katika sayansi ya kompyuta, tuna
aina hiyo ya dhana.

281
00:12:18,109 --> 00:12:20,150
Kazi zote kwamba kuwasilisha,
zote kificho kwamba kuandika

282
00:12:20,150 --> 00:12:21,900
lazima kificho kwamba umeandika.

283
00:12:21,900 --> 00:12:24,280
Haipaswi kuwa kificho kwamba wameweza
kunakiliwa kutoka mahali pengine.

284
00:12:24,280 --> 00:12:26,777
Haipaswi kuwa kificho kwamba
umefanya googled na plopped katika

285
00:12:26,777 --> 00:12:28,360
na wewe kwa kweli sijui kama ni kazi.

286
00:12:28,360 --> 00:12:32,440
Aina ya kuwa na hisia ya
nini ni kufanya lakini si kweli.

287
00:12:32,440 --> 00:12:36,562
Wakati katika shaka, kimsingi,
ni tu kuwa na busara.

288
00:12:36,562 --> 00:12:38,520
On mtaala wetu, tuna
orodha nzima ya mambo

289
00:12:38,520 --> 00:12:40,560
tunaona kama busara
dhidi si busara.

290
00:12:40,560 --> 00:12:43,820
>> Kwa mfano, busara
ni wewe na rafiki yako

291
00:12:43,820 --> 00:12:47,360
kujadili nini njia bora ya kwenda
kuhusu mantiki ya kutatua tatizo.

292
00:12:47,360 --> 00:12:48,910
Hiyo ni haki ya kuridhisha.

293
00:12:48,910 --> 00:12:53,244
Nini isingekuwa busara kama wewe ni
guys got pamoja, typed kificho huo,

294
00:12:53,244 --> 00:12:54,410
na akageuka katika kanuni hiyo.

295
00:12:54,410 --> 00:12:56,302
Hiyo si nzuri.

296
00:12:56,302 --> 00:12:57,510
Same kitu, aina ya insha.

297
00:12:57,510 --> 00:12:59,290
Kama unataka kujadili
na rafiki yako, hey,

298
00:12:59,290 --> 00:13:00,220
hii ni nini nataka kuandika kuhusu.

299
00:13:00,220 --> 00:13:02,500
Hizi ni hatua Nataka
kuchukua kuandika kuhusu hilo, mkuu.

300
00:13:02,500 --> 00:13:03,208
Hiyo ni ajabu.

301
00:13:03,208 --> 00:13:04,790
Tafadhali kushirikiana na kila mmoja.

302
00:13:04,790 --> 00:13:06,540
Kama nyie kuanza
kuandika kitu kimoja,

303
00:13:06,540 --> 00:13:10,020
kugeuka katika insha huo, hiyo ni chini Sawa.

304
00:13:10,020 --> 00:13:13,200
Hivyo wakati katika shaka, si tu kufanya hivyo.

305
00:13:13,200 --> 00:13:16,940
>> Hapa, sisi katika CS50, tuna maandiko
kwamba kukimbia aŭtomate mtihani

306
00:13:16,940 --> 00:13:21,740
si tu usahihi wa kanuni yako,
lakini pia pekee ya kanuni yako.

307
00:13:21,740 --> 00:13:25,920
Hivyo tafadhali wala kuweka yetu katika nafasi
ya kuwa na kupeleka kesi yako kwa EXCOMM.

308
00:13:25,920 --> 00:13:31,110
Tafadhali tu kwa kila mtu, hebu tu
kufanya hili uzoefu wa ajabu.

309
00:13:31,110 --> 00:13:33,600
Kila mtu anajifunza vizuri,
sisi wote ni furaha,

310
00:13:33,600 --> 00:13:37,926
na sisi wote ni kuanzisha
kufanikiwa katika kozi hii.

311
00:13:37,926 --> 00:13:39,800
Kitu ambacho ni sana
kipekee kuhusu darasa hili

312
00:13:39,800 --> 00:13:42,660
kwamba nadhani kila mtu lazima kweli
makini na ni kwamba tuna

313
00:13:42,660 --> 00:13:44,930
kile kinachoitwa majuto
kifungu katika mtaala wetu.

314
00:13:44,930 --> 00:13:50,010
Hivyo kimsingi, ndani ya masaa 72, ikiwa
unaamini tumefanya kitu

315
00:13:50,010 --> 00:13:53,240
wewe si kweli na uhakika ilikuwa
sahihi, tafadhali kuja kwetu.

316
00:13:53,240 --> 00:13:57,220
Sisi ahadi kwamba ndani ya masaa 72
sisi kushughulikia kesi wenyewe

317
00:13:57,220 --> 00:13:59,820
bila akimaanisha juu
mamlaka katika utawala.

318
00:13:59,820 --> 00:14:03,100
>> Hivyo kama wewe kuja kwangu na kusema,
Andi, hey, mimi nina kweli pole,

319
00:14:03,100 --> 00:14:07,620
lakini nadhani kuna mistari michache katika wangu
kificho jana usiku kwamba mimi aina ya googled,

320
00:14:07,620 --> 00:14:10,120
got off ya Stack
Kufurika, nakala na pasted,

321
00:14:10,120 --> 00:14:13,680
na mimi nina kweli, kweli pole
juu ya hilo, basi mimi kujua.

322
00:14:13,680 --> 00:14:16,900
Tafadhali wala tu basi ni fester
na matumaini kwamba mimi kukamata yake.

323
00:14:16,900 --> 00:14:17,784
Sisi kukamata yake.

324
00:14:17,784 --> 00:14:18,450
Tu kuja kwangu.

325
00:14:18,450 --> 00:14:20,520
Napenda kujua ndani ya masaa 72.

326
00:14:20,520 --> 00:14:22,240
Tutaweza kufikiri ufumbuzi.

327
00:14:22,240 --> 00:14:26,679
Na sisi ahadi kwamba sisi si kutaja
Mamlaka chuo kikuu kimsingi.

328
00:14:26,679 --> 00:14:29,220
Hivyo ni kwa maslahi yako bora
tu kuwa waaminifu na kila mtu

329
00:14:29,220 --> 00:14:31,720
kushiriki katika shaka.

330
00:14:31,720 --> 00:14:34,630
>> SAWA.

331
00:14:34,630 --> 00:14:35,240
SAWA.

332
00:14:35,240 --> 00:14:37,800
Hivyo sasa, kwa haraka kabla ya
Mimi kusonga mbele, hana mtu

333
00:14:37,800 --> 00:14:42,670
una maswali kuhusu vifaa
jinsi kozi tunakwenda kukimbia,

334
00:14:42,670 --> 00:14:45,982
jinsi sehemu ni kwenda
kukimbia, yoyote ya kwamba?

335
00:14:45,982 --> 00:14:46,711
SAWA.

336
00:14:46,711 --> 00:14:47,210
Naam.

337
00:14:47,210 --> 00:14:48,126
>> Watazamaji: [inaudible]?

338
00:14:48,126 --> 00:14:50,414

339
00:14:50,414 --> 00:14:51,080
ANDI PENG: Naam.

340
00:14:51,080 --> 00:14:54,850
Hivyo quizzes-- jinsi wengi wenu ni
katika sehemu Jumatatu / Jumatano?

341
00:14:54,850 --> 00:14:56,700
Ni wangapi wenu walio katika
Jumanne / Alhamisi?

342
00:14:56,700 --> 00:14:58,550
OK, hivyo ni mgawanyiko imara hapa.

343
00:14:58,550 --> 00:15:00,900
Hivyo njia kwamba sisi kukimbia
ni katika Yale ni kwamba sisi

344
00:15:00,900 --> 00:15:04,040
ni kwenda na tofauti mbili
quizzes-- moja kwa kila section-- kwamba

345
00:15:04,040 --> 00:15:06,160
zitachukuliwa wakati wa darasa.

346
00:15:06,160 --> 00:15:09,310
Nadhani ni Oktoba, mwishoni mwa Oktoba,
kitu kama hicho, kama wiki moja

347
00:15:09,310 --> 00:15:10,794
ya jaribio.

348
00:15:10,794 --> 00:15:11,960
Yeah, hivyo kuja tu darasani.

349
00:15:11,960 --> 00:15:13,920
Juu ya kwamba Jumatatu au Jumatano,
utasikia kuchukua jaribio.

350
00:15:13,920 --> 00:15:16,336
On kwamba Jumanne au Alhamisi,
utasikia kuchukua jaribio tofauti.

351
00:15:16,336 --> 00:15:18,570
Lakini vifaa hivyo itakuwa kufunikwa.

352
00:15:18,570 --> 00:15:19,160
Naam.

353
00:15:19,160 --> 00:15:20,660
Nzuri swali.

354
00:15:20,660 --> 00:15:21,160
Naam.

355
00:15:21,160 --> 00:15:23,260
>> Watazamaji: kufanya wapi sisi
kwenda kuangalia darasa letu?

356
00:15:23,260 --> 00:15:23,926
>> ANDI PENG: Naam.

357
00:15:23,926 --> 00:15:28,420
Hivyo Nitawatumia nje
barua pepe chochote kila wiki

358
00:15:28,420 --> 00:15:31,460
wakati Quizzes ni graded-- au,
pole, wakati psets ni hadhi.

359
00:15:31,460 --> 00:15:34,120
Psets ni kawaida akageuka
katika na mchana au Ijumaa.

360
00:15:34,120 --> 00:15:37,540
Hivyo mimi ahadi kwamba mimi
kujaribu kupata yao nyuma yenu

361
00:15:37,540 --> 00:15:40,000
na mchana wa Ijumaa iliyofuata.

362
00:15:40,000 --> 00:15:44,950
>> Wakati mimi Daraja pset, nitaleta
nje taarifa juu ya kitabu daraja

363
00:15:44,950 --> 00:15:47,070
kwamba anaelezea alama yako
inaweza kutazamwa online.

364
00:15:47,070 --> 00:15:52,022
Hivyo haki wiki hii, baada ya mimi
kumaliza grading psets wiki iliyopita,

365
00:15:52,022 --> 00:15:54,230
nyie kupata barua pepe
taarifa nawaambia,

366
00:15:54,230 --> 00:15:55,870
hey hii ni wapi
kwenda kuona darasa lako.

367
00:15:55,870 --> 00:15:57,680
Na unaweza kuona kila
kuvunjika kwa darasa lako.

368
00:15:57,680 --> 00:15:58,555
Unaweza kuona comments.

369
00:15:58,555 --> 00:16:00,360
Oh, jambo haraka pia.

370
00:16:00,360 --> 00:16:03,060
Sehemu ya maoni katika kubwa
kitabu ni mahali ambapo mimi itabidi pengine

371
00:16:03,060 --> 00:16:05,300
kutumia idadi kubwa ya muda wangu grading.

372
00:16:05,300 --> 00:16:07,094
Kwa hiyo, jambo moja kwamba ni
kweli ni muhimu wakati

373
00:16:07,094 --> 00:16:09,010
nyie ni kuangalia
darasa yako kwenye psets yako

374
00:16:09,010 --> 00:16:11,400
si tu kuangalia
katika alama za kimwili

375
00:16:11,400 --> 00:16:14,630
lakini pia kuchukua muda wa
kweli kusoma maoni yangu.

376
00:16:14,630 --> 00:16:17,820
>> Mara nyingi kwamba anatoa maoni
juu ya jinsi wewe ni kutatua tatizo.

377
00:16:17,820 --> 00:16:20,480
Kama unahitaji kufanya
kitu kidogo bora,

378
00:16:20,480 --> 00:16:24,080
upinzani kujenga kawaida ni
bora uliotolewa katika sehemu ya maoni hayo.

379
00:16:24,080 --> 00:16:26,950
Hivyo tafadhali, tafadhali, mimi nina kwenda
kutumia muda kuandika maoni.

380
00:16:26,950 --> 00:16:30,440
Tafadhali, napenda kweli kufahamu ni
kama wewe guys ingekuwa kusoma maoni hayo.

381
00:16:30,440 --> 00:16:31,170
SAWA.

382
00:16:31,170 --> 00:16:34,150
Baridi.

383
00:16:34,150 --> 00:16:34,680
>> Sawa.

384
00:16:34,680 --> 00:16:40,680
Hivyo sisi ni kwenda kuanza kuzungumza
na tu kupitia upya haraka

385
00:16:40,680 --> 00:16:45,040
baadhi ya vifaa kutoka
wiki sifuri tu hivyo tuko

386
00:16:45,040 --> 00:16:48,760
juu ya ukurasa wa kulia kwa
mwanzo matatizo ya wiki hii.

387
00:16:48,760 --> 00:16:52,600
Hivyo kitanzi wakati ni moja
ya tatu aina ya mizunguko

388
00:16:52,600 --> 00:16:54,510
sisi kujadiliwa mapema katika darasa hili.

389
00:16:54,510 --> 00:16:57,060
>> Kitanzi wakati kimsingi
Imeandikwa katika syntax

390
00:16:57,060 --> 00:17:00,666
ambapo, wakati hali fulani,
kufanya hivyo tena na tena, sawa?

391
00:17:00,666 --> 00:17:02,040
Fikiria ni katika hii graphic hapa.

392
00:17:02,040 --> 00:17:04,780
Wewe ni kwenda kuanza saa
hatua fulani katika kanuni yako.

393
00:17:04,780 --> 00:17:09,030
Wewe ni kwenda kuingia hali kitanzi
if-- mimi hamjui x ni chini ya moja.

394
00:17:09,030 --> 00:17:11,677
>> Kama hiyo ni kweli, wewe ni kwenda
kutekeleza kitanzi mwili.

395
00:17:11,677 --> 00:17:14,010
Na wewe ni kwenda kuendelea kufanya
kwamba tena, tena, tena,

396
00:17:14,010 --> 00:17:17,900
tena na over-- ambayo ni kwa nini ni
loop-- mpaka hali yako inakuwa

397
00:17:17,900 --> 00:17:19,079
uongo.

398
00:17:19,079 --> 00:17:22,140
Hivyo kwa njia hii, wakati kitanzi
ni moja ya njia rahisi

399
00:17:22,140 --> 00:17:25,619
kuandika aina yoyote ya masharti kwamba
mahitaji ya kurudia tena na tena na tena.

400
00:17:25,619 --> 00:17:28,109
Tu kuwa makini wakati wowote
wewe ni kuandika aina yoyote ya kitanzi

401
00:17:28,109 --> 00:17:32,140
kwamba una hali ya kutoka vile
pamoja na update kwa chochote

402
00:17:32,140 --> 00:17:36,714
ni ili kitanzi yako haina tu
kukimbia tena na tena kubwa.

403
00:17:36,714 --> 00:17:38,630
Katika hali yoyote, wewe ni kwenda
kutaka kuhakikisha

404
00:17:38,630 --> 00:17:42,670
kuwa wewe ni kubadilisha baadhi ya nyanja ya
kanuni yako au mwishoni mwa kitanzi

405
00:17:42,670 --> 00:17:46,680
tu kuhakikisha kwamba una njia
ya inaendelea kuelekea hali

406
00:17:46,680 --> 00:17:48,400
kwamba unataka kukutana na mwisho.

407
00:17:48,400 --> 00:17:50,239
Je, hiyo mantiki kwa kila mtu?

408
00:17:50,239 --> 00:17:52,530
Sisi tu hawataki kuwa
hawakupata juu katika ond hii ambapo

409
00:17:52,530 --> 00:17:55,710
sisi kwenda kwa kuzunguka na
hakuna njia ya kuvunja kitanzi.

410
00:17:55,710 --> 00:17:58,844
Na kila kitanzi kimsingi
ina njia ya kufanya hivyo.

411
00:17:58,844 --> 00:17:59,344
SAWA.

412
00:17:59,344 --> 00:18:03,030

413
00:18:03,030 --> 00:18:06,060
>> Pili, wengi wenu
katika yako Mario psets

414
00:18:06,060 --> 00:18:08,910
pengine alikuwa kuajiri
aina hii ya kitanzi.

415
00:18:08,910 --> 00:18:11,802
Hiyo inaitwa kufanya wakati kitanzi.

416
00:18:11,802 --> 00:18:14,510
Awali ya yote, yeyote anaweza kuniambia
nini tofauti kati ya kufanya

417
00:18:14,510 --> 00:18:16,586
kitanzi wakati na kitanzi wakati ni?

418
00:18:16,586 --> 00:18:17,086
Naam.

419
00:18:17,086 --> 00:18:21,030
>> Watazamaji: kufanya wakati kitanzi
anaendesha kwa mara ya kwanza [inaudible].

420
00:18:21,030 --> 00:18:22,120
>> ANDI PENG: Yeah, kwa uhakika.

421
00:18:22,120 --> 00:18:27,130
Hivyo kufanya wakati kitanzi daima gani chochote
ni ndani ya do, ndani ya mabano

422
00:18:27,130 --> 00:18:30,520
kuna na anafanya hali hiyo
kabla ya kuangalia kwa the-- pole,

423
00:18:30,520 --> 00:18:32,940
je, hiyo kificho kabla
kuangalia kwa hali hiyo.

424
00:18:32,940 --> 00:18:37,200
Na hii ni hasa muhimu kwa sisi
hapa katika darasa hili, kwa sababu mara nyingi

425
00:18:37,200 --> 00:18:41,450
tunakwenda wanataka kuchochea
user kwa aina fulani ya pembejeo.

426
00:18:41,450 --> 00:18:43,520
Na kisha, kutegemea
pembejeo wao kutupatia,

427
00:18:43,520 --> 00:18:46,150
basi tunaweza kutathmini, loo, kufanya
tunahitaji kuwashawishi tena?

428
00:18:46,150 --> 00:18:49,930
>> Hivyo katika Mario, kama mtumiaji aliwapa
urefu hasi, kwa mfano,

429
00:18:49,930 --> 00:18:52,990
wewe ni kwenda haraka kwanza
na kufanya chochote ni ndani.

430
00:18:52,990 --> 00:18:54,820
Kisha utaenda kuangalia wakati.

431
00:18:54,820 --> 00:18:57,570
Unajua, ni hasi 1,
ni kwamba idadi chanya?

432
00:18:57,570 --> 00:19:00,680
Kama siyo, mimi nina kwenda
nyuma na kurudia na kurudia kufanya

433
00:19:00,680 --> 00:19:03,950
na kurudia na kurudia mpaka
hatimaye kukupa idadi hiyo wewe kama,

434
00:19:03,950 --> 00:19:07,002
tuweze zote kuajiri katika kanuni zetu.

435
00:19:07,002 --> 00:19:09,210
Ni pretty muhimu kwa
kimsingi mchango wowote kwa mtumiaji.

436
00:19:09,210 --> 00:19:11,760
Naweza kuthibitisha yoyote
wakati katika pset ambapo

437
00:19:11,760 --> 00:19:15,070
tunakuomba pembejeo
aina yoyote ya kificho, tuko

438
00:19:15,070 --> 00:19:17,540
pengine ni kwenda kukupa
kesi mtihani ambao tuko

439
00:19:17,540 --> 00:19:21,200
kwenda kukupa jambo baya hiyo ni
kwenda kujaribu kuvunja kanuni yako.

440
00:19:21,200 --> 00:19:25,044
>> Kama sisi kujaribu kuuliza wewe pembejeo an
integer, tunaweza kukupa kamba tu

441
00:19:25,044 --> 00:19:26,460
na kuona ni jinsi gani ingekuwa kushughulikia jambo hilo.

442
00:19:26,460 --> 00:19:30,610
Kama tunakuomba kuajiri umri,
sisi inaweza kukupa namba hasi

443
00:19:30,610 --> 00:19:32,340
kuona jinsi gani kushughulikia hilo.

444
00:19:32,340 --> 00:19:37,260
Tu kuhakikisha nyie ni kupima kwa
kesi ambayo huwezi kupata bora

445
00:19:37,260 --> 00:19:38,590
pembejeo, hebu sema tu.

446
00:19:38,590 --> 00:19:40,510
Na kufanya wakati kitanzi
ni mara nyingi bora

447
00:19:40,510 --> 00:19:45,260
njia ya kubuni kanuni yako hivyo
kwamba hukutana kwamba wigo.

448
00:19:45,260 --> 00:19:45,760
SAWA.

449
00:19:45,760 --> 00:19:48,930

450
00:19:48,930 --> 00:19:49,470
>> SAWA.

451
00:19:49,470 --> 00:19:53,270
Hivyo hii pengine ni
tata kitanzi nje ya tatu

452
00:19:53,270 --> 00:19:54,990
kwamba tumekuwa inaonekana katika hadi sasa.

453
00:19:54,990 --> 00:19:56,689
Na inaonekana sana inatisha kwa mara ya kwanza.

454
00:19:56,689 --> 00:19:59,730
Lakini Mimi kuhakikisha, kwa mara nyingine nyie
kupata hutegemea jinsi ya kutumia kwa kitanzi,

455
00:19:59,730 --> 00:20:03,320
ni moja ya mambo muhimu sana,
zana zaidi na manufaa katika ghala yako

456
00:20:03,320 --> 00:20:05,300
kwa kusonga mbele katika darasa hili.

457
00:20:05,300 --> 00:20:09,920
>> Hivyo kwa mfano, katika Scratch,
tulikuwa na kuzuia hii ni rahisi sana

458
00:20:09,920 --> 00:20:13,180
kwamba alisema tu kurudia huyu mmoja
misemo fulani mara kadhaa.

459
00:20:13,180 --> 00:20:16,260
Kwa njia, SAJ--
hiyo ni Scaz Andi Jason.

460
00:20:16,260 --> 00:20:18,740
Sisi mara nyingi ishara barua pepe yetu SAJ.

461
00:20:18,740 --> 00:20:20,360
Tukisema SAJ, msiwe na kuchanganyikiwa.

462
00:20:20,360 --> 00:20:22,630
Hiyo tu sisi.

463
00:20:22,630 --> 00:20:28,600
>> Hivyo katika Scratch, tulikuwa na uwezo wa kuwa na
kuzuia kwamba alisema, kurudia nampenda SAJ!

464
00:20:28,600 --> 00:20:29,430
Mara 10.

465
00:20:29,430 --> 00:20:30,130
Rahisi sana.

466
00:20:30,130 --> 00:20:32,302
Mantiki nyuma kwamba ni
sana, rahisi sana, sawa?

467
00:20:32,302 --> 00:20:35,260
Nataka kwanza kwenda kwa njia ya kwanza
muda na kuona kwamba, mara ya pili

468
00:20:35,260 --> 00:20:38,510
na kuona kwamba, mara ya tatu, na kadhalika
na kadhalika, mpaka hit kwa 10.

469
00:20:38,510 --> 00:20:41,960
>> Na njia tunataka kuwakilisha kwamba katika
kificho ni njia rahisi kwa kitanzi.

470
00:20:41,960 --> 00:20:45,440
Hivyo kwa, wewe ni kwenda kutangaza
kutofautiana yako hapa, katika kesi hii,

471
00:20:45,440 --> 00:20:46,349
kwa int.

472
00:20:46,349 --> 00:20:47,390
Tunakwenda jina hilo i.

473
00:20:47,390 --> 00:20:49,500
Tunakwenda initialize kwa 0.

474
00:20:49,500 --> 00:20:52,490
Na kuacha toleo ni
kwenda kuwa i ni chini ya 10.

475
00:20:52,490 --> 00:20:54,622
Na update ni kwenda kuwa i ++.

476
00:20:54,622 --> 00:20:57,750
>> Na ndani ya kitanzi, ni kwenda
kutekeleza mpaka hatimaye

477
00:20:57,750 --> 00:21:01,490
hits mwisho wa condition-- ambao
kesi, ni kwenda kuvunja kitanzi.

478
00:21:01,490 --> 00:21:04,600
Kuna haja ya kuwa mambo ambayo wewe
guys kila aina ya kuona mbele

479
00:21:04,600 --> 00:21:07,270
na alikuwa na kufanya kwa tatizo lako kuweka moja.

480
00:21:07,270 --> 00:21:12,310
Je, mtu yeyote una maswali yoyote
kuhusu kwa mizunguko sasa hivi?

481
00:21:12,310 --> 00:21:12,930
SAWA.

482
00:21:12,930 --> 00:21:13,430
Kubwa.

483
00:21:13,430 --> 00:21:17,520

484
00:21:17,520 --> 00:21:18,620
>> SAWA.

485
00:21:18,620 --> 00:21:22,270
Hivyo kwa wale ambao wana
kusoma spec pset kwa wiki hii

486
00:21:22,270 --> 00:21:27,690
tunajua kwamba sisi ni kwenda na kuajiri
kitu kinachoitwa ASCII na meza ASCII.

487
00:21:27,690 --> 00:21:32,380
Basi Daudi katika hotuba wakaenda upande wa pili kwa ufupi
jinsi ya kompyuta essentially-- kila kitu

488
00:21:32,380 --> 00:21:35,410
ni encoded katika kompyuta katika
mapacha, katika zeros na ndio.

489
00:21:35,410 --> 00:21:39,740
Na kwa njia hiyo kompyuta ni uwezo
kuhifadhi maadili tofauti kwa kuongeza

490
00:21:39,740 --> 00:21:44,360
kwa zeros na ndio ni kupitia ramani
wale idadi kuiwakilisha tarakimu mengine

491
00:21:44,360 --> 00:21:47,220
au wahusika kimsingi mengine.

492
00:21:47,220 --> 00:21:49,810
>> Hivyo katika kesi hii,
ASCII table-- yote ni gani

493
00:21:49,810 --> 00:21:53,600
ni wahusika kwenye ramani, au chars, kwa idadi.

494
00:21:53,600 --> 00:21:57,385
Hivyo chanzo kanuni faili katika
yako computer-- anaona,

495
00:21:57,385 --> 00:22:00,010
hey, kundi la zeros na ndio,
zeros na ndio, zeros na ndio.

496
00:22:00,010 --> 00:22:02,350
Hiyo ni nini kuhifadhiwa katika
kumbukumbu halisi ya kompyuta yako.

497
00:22:02,350 --> 00:22:04,750
>> Lakini wakati sisi binadamu kutaka
kuwasiliana na kompyuta,

498
00:22:04,750 --> 00:22:08,249
sisi want-- kusema, kwa mfano,
kama nataka uppercase A,

499
00:22:08,249 --> 00:22:10,540
Mimi nina kwenda haja ya baadhi ya njia
ya kuwaambia kompyuta, loo,

500
00:22:10,540 --> 00:22:16,300
wakati mimi aina uppercase A, I mean
uwakilishi huu katika mapacha.

501
00:22:16,300 --> 00:22:22,260
>> Na hivyo njia sisi kufanya hivyo ni kurusha
Jambo holela aitwaye meza ASCII,

502
00:22:22,260 --> 00:22:25,020
ambapo sisi, kama binadamu, kama
programmers, baadhi ya wakati uliopita,

503
00:22:25,020 --> 00:22:28,660
sisi kiholela aliamua kwamba sisi
wanakwenda kuwapa idadi hawa

504
00:22:28,660 --> 00:22:30,960
maadili kwa wahusika hawa.

505
00:22:30,960 --> 00:22:32,720
>> Hivyo wewe guys unaweza google huu online.

506
00:22:32,720 --> 00:22:37,120
Nadhani kuna kiungo yake katika yako
pset-- tu meza ramani ASCII, ASCII

507
00:22:37,120 --> 00:22:37,720
meza.

508
00:22:37,720 --> 00:22:40,722
Ni tu inasababisha mapacha
idadi katika wahusika.

509
00:22:40,722 --> 00:22:42,930
Na itakuja kuwa sana
muhimu kwa ajili ya tatizo kuweka yako

510
00:22:42,930 --> 00:22:45,470
kila unataka
mahesabu ya kitu chochote au kama wewe

511
00:22:45,470 --> 00:22:47,880
wanataka kuonyesha baadhi ya
wahusika au integers

512
00:22:47,880 --> 00:22:50,327
au kuendesha baadhi ya wahusika.

513
00:22:50,327 --> 00:22:52,160
Ni kwenda kuwa sana
muhimu kwamba nyote

514
00:22:52,160 --> 00:22:55,140
kujua jinsi ya navigate meza ASCII.

515
00:22:55,140 --> 00:23:01,260
>> Hivyo kwa mfano, uppercase A
ni kuwakilishwa na idadi 65.

516
00:23:01,260 --> 00:23:04,207
Na ndogo a
ni kuwakilishwa na 97.

517
00:23:04,207 --> 00:23:07,040
Hivyo ni muhimu kujua kwamba
Tofauti kati ya maadili mbili

518
00:23:07,040 --> 00:23:08,320
ni 32.

519
00:23:08,320 --> 00:23:13,210
Mara nyingi, kama unahitaji kubadili kutoka
moja hadi nyingine, tofauti ni 32.

520
00:23:13,210 --> 00:23:15,710
Na msiwe na wasiwasi kama wewe ni aina
ya kuchanganyikiwa juu ya hili kwa mara ya kwanza.

521
00:23:15,710 --> 00:23:20,230
Tutaweza kwenda juu ya jinsi tunataka
kuajiri hii katika kanuni halisi.

522
00:23:20,230 --> 00:23:24,700

523
00:23:24,700 --> 00:23:26,380
>> SAWA.

524
00:23:26,380 --> 00:23:30,770
Hivyo kwa wale wa wewe kwa Laptops nje,
kujisikia huru na kuvuta up meza ASCII,

525
00:23:30,770 --> 00:23:36,030
kwa sababu hizi pengine
zinahitaji nyie rejea

526
00:23:36,030 --> 00:23:38,100
nini wahusika ni.

527
00:23:38,100 --> 00:23:38,640
SAWA.

528
00:23:38,640 --> 00:23:42,840
>> Hivyo kujua kwamba baadhi ya
wahusika ramani kwa idadi fulani,

529
00:23:42,840 --> 00:23:47,240
kama ningekuwa kukimbia tu kwanza
mstari wa kwamba code-- printf a,

530
00:23:47,240 --> 00:23:50,900
Herufi za chini, bala
uppercase A. Je, mtu yeyote

531
00:23:50,900 --> 00:23:55,880
na nadhani juu ya nini itakuwa
uchapishaji nje ya screen hivi sasa?

532
00:23:55,880 --> 00:23:58,190
>> Hivyo kwanza ya yote, ni nini
lowercase kuwakilisha?

533
00:23:58,190 --> 00:24:00,990
Nini idadi ni kwamba
encoded katika meza ASCII.

534
00:24:00,990 --> 00:24:01,490
Pole?

535
00:24:01,490 --> 00:24:02,630
>> Watazamaji: 97?

536
00:24:02,630 --> 00:24:03,630
>> ANDI PENG: 97, kubwa.

537
00:24:03,630 --> 00:24:05,077
Na ni nini uppercase A?

538
00:24:05,077 --> 00:24:06,330
>> Watazamaji: 65.

539
00:24:06,330 --> 00:24:08,255
>> ANDI PENG: Kwa hiyo ni nini 97 bala 65?

540
00:24:08,255 --> 00:24:09,227
>> Watazamaji: 32.

541
00:24:09,227 --> 00:24:09,810
ANDI PENG: Sawa.

542
00:24:09,810 --> 00:24:13,530
Basi je, wewe guys kufikiri ni kwenda
kutokea wakati mimi pembejeo kwamba mstari wa kanuni

543
00:24:13,530 --> 00:24:14,670
ndani ya kompyuta yangu?

544
00:24:14,670 --> 00:24:17,981

545
00:24:17,981 --> 00:24:19,896
>> Watazamaji: [inaudible].

546
00:24:19,896 --> 00:24:21,020
ANDI PENG: Sorry, kuongea.

547
00:24:21,020 --> 00:24:22,520
Hakuna wasiwasi.

548
00:24:22,520 --> 00:24:25,750
Hii ni salama sana
mazingira, bala kamera.

549
00:24:25,750 --> 00:24:27,550
Tuko wote kwenda to-- hakuna wasiwasi.

550
00:24:27,550 --> 00:24:30,940
Tu sisi ni wote kwenda kujifanya kama
ni tu sisi makubwa katika chumba hiki.

551
00:24:30,940 --> 00:24:31,480
Hakuna wasiwasi.

552
00:24:31,480 --> 00:24:33,410
Hakuna swali la kijinga mno.

553
00:24:33,410 --> 00:24:35,300
Hakuna jibu ni jibu kijinga.

554
00:24:35,300 --> 00:24:38,260
Mimi pengine ni kwenda kufanya makosa
Katika mafundisho yangu.

555
00:24:38,260 --> 00:24:40,740
Umakini, guys, tu blurt nje.

556
00:24:40,740 --> 00:24:43,092
Kuwa na ujasiri katika mwenyewe, unajua?

557
00:24:43,092 --> 00:24:43,800
Kwa hiyo kile ni kwamba?

558
00:24:43,800 --> 00:24:47,990
Nani alisema jibu kwamba mwisho?

559
00:24:47,990 --> 00:24:48,540
SAWA.

560
00:24:48,540 --> 00:24:50,380
Kelele kwamba nzuri na ya wazi.

561
00:24:50,380 --> 00:24:51,220
>> Watazamaji: 32?

562
00:24:51,220 --> 00:24:51,850
>> ANDI PENG: 32.

563
00:24:51,850 --> 00:24:54,141
OK, hebu kukimbia hii kanuni na
kuona kama kwamba ni nini kinatokea.

564
00:24:54,141 --> 00:25:00,260

565
00:25:00,260 --> 00:25:00,760
SAWA.

566
00:25:00,760 --> 00:25:03,300

567
00:25:03,300 --> 00:25:06,360
Hivyo kama wewe guys unaweza aina ya
ona, mfano nukuu nimekuwa

568
00:25:06,360 --> 00:25:12,250
kuanzisha hapa kwa jinsi gani tunataka kuajiri
aina yoyote ya mpango katika kompyuta yetu.

569
00:25:12,250 --> 00:25:14,770
Tuna kazi yetu kuu
ndani ya kazi yetu kuu.

570
00:25:14,770 --> 00:25:17,265
Mimi tu kwenda na nakala na
kuweka mstari wa kanuni.

571
00:25:17,265 --> 00:25:21,082

572
00:25:21,082 --> 00:25:23,540
Pia kuwa makini wakati nyie
ni kuiga na pasting code.

573
00:25:23,540 --> 00:25:28,750
Waendeshaji wakati mwingine baadhi ya
si kuweka juu ya usahihi.

574
00:25:28,750 --> 00:25:31,397
Katika kesi hiyo, bala
ishara kwa kweli dash.

575
00:25:31,397 --> 00:25:32,980
Na hivyo kompyuta hakuwa pick it up.

576
00:25:32,980 --> 00:25:35,870
Hivyo ilibidi kurudi nyuma na
kimwili retype hiyo.

577
00:25:35,870 --> 00:25:37,846
Tu kuwa makini wakati
nyie ni kufanya hivyo.

578
00:25:37,846 --> 00:25:41,178

579
00:25:41,178 --> 00:25:42,660
>> SAWA.

580
00:25:42,660 --> 00:25:43,980
Sisi ni kwenda kukimbia hii hapa.

581
00:25:43,980 --> 00:25:45,670
Hivyo sisi ni kwenda kwa cd ndani ya section2 yetu.

582
00:25:45,670 --> 00:25:50,470

583
00:25:50,470 --> 00:25:52,030
Nimekuwa kuitwa hii asciimath mpango.

584
00:25:52,030 --> 00:25:55,690
Basi kumbuka, wakati sisi kukimbia yoyote
mpango, tunataka kwanza kukusanya ni

585
00:25:55,690 --> 00:25:57,150
kwa kuendesha hivyo kwa njia ya kufanya yetu.

586
00:25:57,150 --> 00:26:00,030
Na kisha tunataka kweli kuendesha
Mpango kwa kufanya dot-kufyeka.

587
00:26:00,030 --> 00:26:01,280
Hivyo sisi ni kwenda kwa ./asciimath.

588
00:26:01,280 --> 00:26:05,780

589
00:26:05,780 --> 00:26:06,590
>> Haki, kuna sisi kwenda.

590
00:26:06,590 --> 00:26:07,410
Na tunaona 32.

591
00:26:07,410 --> 00:26:07,930
Umefanya vizuri.

592
00:26:07,930 --> 00:26:10,340
Unastahili kipande cha pipi.

593
00:26:10,340 --> 00:26:11,160
Pipi kwa ajili yenu.

594
00:26:11,160 --> 00:26:11,900
Pole.

595
00:26:11,900 --> 00:26:13,100
Sawa.

596
00:26:13,100 --> 00:26:13,670
SAWA.

597
00:26:13,670 --> 00:26:18,070
Ili tuweze kurudi nyuma kwa mfano wetu hapa.

598
00:26:18,070 --> 00:26:23,530

599
00:26:23,530 --> 00:26:24,345
Aah, hakuna.

600
00:26:24,345 --> 00:26:29,147

601
00:26:29,147 --> 00:26:31,090
Aah.

602
00:26:31,090 --> 00:26:32,490
SAWA.

603
00:26:32,490 --> 00:26:34,610
Mimi tu kwenda kuitunza kama hicho.

604
00:26:34,610 --> 00:26:48,520

605
00:26:48,520 --> 00:26:51,240
SAWA.

606
00:26:51,240 --> 00:26:51,740
SAWA.

607
00:26:51,740 --> 00:26:55,340
Hivyo kama wewe guys unaweza kuona, tunaweza kufanya
kura ya mambo ya kuvutia sana,

608
00:26:55,340 --> 00:26:58,880
mambo mengi baridi sana, mengi ya
mambo ngumu sana kuwashirikisha

609
00:26:58,880 --> 00:27:02,720
Wahusika ASCII na namba.

610
00:27:02,720 --> 00:27:05,890
Mara baada ya kupata chini ya kujipanga tano,
hiyo ni mengi kufuata pamoja.

611
00:27:05,890 --> 00:27:07,640
Sisi siyo kwenda
kupitia sehemu.

612
00:27:07,640 --> 00:27:10,720
Kujisikia huru, kama unaweza,
sababu ni nje ya karatasi

613
00:27:10,720 --> 00:27:14,750
kwanza juu ya kile lazima kuwa kinachotokea wakati
wewe pembejeo kama kamba ya maadili.

614
00:27:14,750 --> 00:27:19,720
Kwa mfano, kwa kuwa mstari wa mwisho, tuna
z-- ambayo inawakilisha number-- fulani

615
00:27:19,720 --> 00:27:24,740
a-- ambayo pia inawakilisha
baadhi number-- pamoja na 1 modulos 26

616
00:27:24,740 --> 00:27:26,750
pamoja na Herufi za chini.

617
00:27:26,750 --> 00:27:29,220
>> Kama nyie kuendelea kusoma
kupitia haya,

618
00:27:29,220 --> 00:27:34,009
waone mfano kuja katika
jinsi sisi ni kufanyia kanuni.

619
00:27:34,009 --> 00:27:36,050
Mimi sana, sana kupendekeza
baada ya kifungu cha nyote

620
00:27:36,050 --> 00:27:38,160
guys kwenda mbele na pembejeo
wale wote katika kompyuta yako

621
00:27:38,160 --> 00:27:40,060
na kuona aina gani ya
idadi ni kuja nje

622
00:27:40,060 --> 00:27:43,090
na hoja kupitia kwa nini wale ni
kinachotokea, kwa sababu kwa psets yako

623
00:27:43,090 --> 00:27:45,060
utakuwa ni kweli ni muhimu
kwa wewe kuelewa

624
00:27:45,060 --> 00:27:47,132
kwa nini mambo fulani yanayotokea.

625
00:27:47,132 --> 00:27:48,590
Wote wa slides hizi itakuwa online.

626
00:27:48,590 --> 00:27:51,510
Hivyo hakuna wasiwasi kuhusu kujaribu
kimwili nakala chini maelezo.

627
00:27:51,510 --> 00:27:52,510
Kila kitu ni online.

628
00:27:52,510 --> 00:27:54,050
Sehemu hii yenyewe itakuwa online.

629
00:27:54,050 --> 00:27:57,500
Wote chanzo kanuni yangu kwamba
Mimi mbio itakuwa online.

630
00:27:57,500 --> 00:27:58,180
Naam.

631
00:27:58,180 --> 00:27:59,430
Je, bado una swali?

632
00:27:59,430 --> 00:28:00,587
Watazamaji: modulos ni nini?

633
00:28:00,587 --> 00:28:01,170
ANDI PENG: Sawa.

634
00:28:01,170 --> 00:28:05,620
Hivyo modulo ni alama ambayo inaenda
kuwa pretty muhimu kwa pset guys wako

635
00:28:05,620 --> 00:28:06,690
hapa.

636
00:28:06,690 --> 00:28:12,280
Hivyo njia kwamba waendeshaji
katika C na katika programu kazi

637
00:28:12,280 --> 00:28:16,360
ni kwamba una kile kinachoitwa
mgawanyiko ishara na modulus ishara,

638
00:28:16,360 --> 00:28:18,350
ambayo ni haki kama ishara asilimia.

639
00:28:18,350 --> 00:28:24,840
>> Hivyo katika C, wakati wa kufanya integer
kugawanywa na integer na kufyeka,

640
00:28:24,840 --> 00:28:27,720
C ana tabia ya kutaka kukata
mbali yote ya pointi alisema,

641
00:28:27,720 --> 00:28:30,290
kwa sababu integer anataka
kubadilisha na integer.

642
00:28:30,290 --> 00:28:33,550
Ni si kwenda kutaka kuwa mara mbili
pamoja na kundi la decimals zote baada yake.

643
00:28:33,550 --> 00:28:39,322
>> Hivyo kama mimi kufanya 3 kugawanywa na 2, ni kwenda
kukatwa 0.5 na kukupa tu 1.

644
00:28:39,322 --> 00:28:41,530
Hivyo hiyo ni kitu cha
makini sana wa wakati uko

645
00:28:41,530 --> 00:28:45,294
kufanya aina yoyote ya hisabati katika programu,
ni kwamba idadi ya kupata

646
00:28:45,294 --> 00:28:47,210
inaweza kuwa idadi
kwamba walikuwa kufikiri,

647
00:28:47,210 --> 00:28:50,190
ambayo ni kwa nini rounding katika yako
mwisho pset ni muhimu sana.

648
00:28:50,190 --> 00:28:51,980
>> Modulo anatoa salio.

649
00:28:51,980 --> 00:28:56,200
Hivyo kwa mfano, kama mimi 3
modulo 2-- hivyo asilimia 3 ishara 2--

650
00:28:56,200 --> 00:28:58,020
ingekuwa kukupa salio ya jambo hilo.

651
00:28:58,020 --> 00:29:00,460
Hivyo 3 kugawanywa na 2 ni 1.5.

652
00:29:00,460 --> 00:29:01,410
Ni 1 salio ya 1.

653
00:29:01,410 --> 00:29:04,600
Itakuwa kukupa 1, ambayo
ni salio ya jambo hilo.

654
00:29:04,600 --> 00:29:07,361
>> Hivyo wakati nyie ni kusonga
kupitia meza ASCII,

655
00:29:07,361 --> 00:29:09,735
modulo kuishia kuwa
kitu ambacho ni muhimu sana,

656
00:29:09,735 --> 00:29:11,240
na tutaweza kujadili kwamba baadaye.

657
00:29:11,240 --> 00:29:17,750

658
00:29:17,750 --> 00:29:19,040
>> SAWA.

659
00:29:19,040 --> 00:29:27,300
Hivyo kitu ambacho ni mzuri,
pretty mpya na mzuri kipekee

660
00:29:27,300 --> 00:29:31,920
kwamba tumekuwa kujadiliwa wiki hii ni
dhana ya nini safu ni.

661
00:29:31,920 --> 00:29:34,370
Hivyo safu ni ya kwanza
aina ya muundo data

662
00:29:34,370 --> 00:29:36,320
kwamba tunakwenda
kukutana katika darasa hili.

663
00:29:36,320 --> 00:29:40,010
Muundo wa data zote ni ni
aina fulani ya kiholela,

664
00:29:40,010 --> 00:29:43,370
halisi ya mambo kama muundo
kwamba sisi kama programmers tumemuumba,

665
00:29:43,370 --> 00:29:47,890
kwamba tumekuwa kuweka katika kanuni yetu kwamba
unaweza vyenye vipande nyingine ya kificho.

666
00:29:47,890 --> 00:29:51,090
>> Hivyo kwa mantiki hii, array--
kufikiria kama faili baraza la mawaziri,

667
00:29:51,090 --> 00:29:53,470
ambapo kama wewe kufungua mbalimbali
rafu ya faili baraza la mawaziri yako,

668
00:29:53,470 --> 00:29:55,630
unaweza kupata mambo mbalimbali.

669
00:29:55,630 --> 00:29:58,630
Katika kumbukumbu, safu ni kufanya tu
kitu kimoja kwenye kompyuta yako.

670
00:29:58,630 --> 00:30:01,730
Unaweza kuwa tofauti blocks-- sisi
kuwaita indices-- ya safu.

671
00:30:01,730 --> 00:30:04,210
Ni kama tu kuzuia,
rafu ya kumbukumbu

672
00:30:04,210 --> 00:30:07,580
kwamba tumeunda ndani ya yako
kompyuta ambayo unaweza pembejeo

673
00:30:07,580 --> 00:30:10,270
mambo fulani katika maeneo mbalimbali.

674
00:30:10,270 --> 00:30:18,000
>> Hivyo, pamoja na safu, wewe
daima kuwa na specify--

675
00:30:18,000 --> 00:30:22,360
una bayana kutangaza
safu katika muundo yafuatayo.

676
00:30:22,360 --> 00:30:24,290
Wewe ni kwenda kwanza
kutaja aina data

677
00:30:24,290 --> 00:30:25,831
kwamba unataka kujenga ya safu.

678
00:30:25,831 --> 00:30:28,870
Kama nataka safu ya integers,
Mimi kwenda kuweka int pale pale.

679
00:30:28,870 --> 00:30:32,079
Kama nataka safu ya masharti,
Mimi nina kwenda kuweka masharti huko,

680
00:30:32,079 --> 00:30:34,995
jina la safu yako, na kisha
wewe ni kwenda na mabano mraba.

681
00:30:34,995 --> 00:30:39,580
Na ndani ya mabano mraba, wewe ni
kwenda na ukubwa wa safu yako.

682
00:30:39,580 --> 00:30:42,900
>> Kitu ambacho kweli ni muhimu kwa
kukumbuka wakati kujenga arrays ni

683
00:30:42,900 --> 00:30:46,530
kwamba, mara moja kujenga
safu, kwamba ukubwa hawezi kubadilika.

684
00:30:46,530 --> 00:30:50,180
Hivyo kama unajua kwamba hivi sasa
una safu ya ukubwa 10,

685
00:30:50,180 --> 00:30:54,550
unajua kwamba mimi nina kwenda na seli 10
ndani ya au 10 fahirisi ndani ya safu hii,

686
00:30:54,550 --> 00:30:56,830
na ni kamwe kwenda
kupanua au kupunguza

687
00:30:56,830 --> 00:30:59,850
hakuna jambo gani, na kwamba kuna
sasa tu vitalu 10 ya nafasi

688
00:30:59,850 --> 00:31:04,490
zilizotengwa katika kumbukumbu yako kwamba wanaweza kuhifadhi
hadi 10 mambo ya chochote wameweza kuweka.

689
00:31:04,490 --> 00:31:08,790
>> Hivyo kwa njia hii, data aina safu,
muundo data kwamba ni safu

690
00:31:08,790 --> 00:31:13,392
ni tofauti sana na baadhi ya watu wengine tutaweza
kufunika baadaye katika kozi hii.

691
00:31:13,392 --> 00:31:15,170
Naam.

692
00:31:15,170 --> 00:31:20,080
Kwa mfano, kama alitaka
kujenga safu ya ukubwa 3 kwamba

693
00:31:20,080 --> 00:31:23,670
zilizomo vigezo ya integer--
loo, pole, wa temperature--

694
00:31:23,670 --> 00:31:25,640
na joto, ya
Bila shaka, ni integer.

695
00:31:25,640 --> 00:31:28,710
>> Hivyo tunataka kujenga int, ambayo ni
data ya aina ya nini tunataka kuhifadhi.

696
00:31:28,710 --> 00:31:32,680
Sisi ni kwenda kuwaita joto huu
kwa ajili ya utaratibu wa majina ya kumtaja

697
00:31:32,680 --> 00:31:34,200
jambo ambalo sisi wote kuelewa.

698
00:31:34,200 --> 00:31:35,900
Na tunakwenda na mabano mraba.

699
00:31:35,900 --> 00:31:37,200
Na tunataka namba tatu.

700
00:31:37,200 --> 00:31:39,000
Hivyo sisi ni kwenda kuweka
tatu ndani yake.

701
00:31:39,000 --> 00:31:41,041
>> Kitu ambacho ni kweli
muhimu kukumbuka

702
00:31:41,041 --> 00:31:43,530
ni kwamba arrays ni sifuri indexed.

703
00:31:43,530 --> 00:31:46,410
Wote kwamba maana ni kwamba
kuanza na ripoti ya 0,

704
00:31:46,410 --> 00:31:49,800
na wewe kukimbia juu kupitia
ukubwa wa safu bala 1.

705
00:31:49,800 --> 00:31:52,730
Hivyo kwa mfano hapa, sisi
na safu ya ukubwa 3.

706
00:31:52,730 --> 00:31:54,680
Ni kwenda kuwa na uwezo
kushikilia maadili matatu.

707
00:31:54,680 --> 00:31:57,450
Lakini idadi themselves-- kwamba
idadi, safu, kwamba ripoti,

708
00:31:57,450 --> 00:32:00,271
safu, ni 0 kwa njia ya 2.

709
00:32:00,271 --> 00:32:03,520
Hivyo guys, kuwa kweli, kweli makini wakati
wewe ni kwenda kupitia matatizo yako kuweka

710
00:32:03,520 --> 00:32:06,500
na kujenga aina yoyote ya safu,
kwa sababu mara nyingi ni

711
00:32:06,500 --> 00:32:08,490
kweli, kweli rahisi kusahau kwamba.

712
00:32:08,490 --> 00:32:11,840
Mimi kwa kweli hawana ripoti
ya 3, kwamba mimi sasa tu

713
00:32:11,840 --> 00:32:13,130
na ripoti ya 2.

714
00:32:13,130 --> 00:32:16,046
Na kama wewe kujaribu
kupata tatu ripoti,

715
00:32:16,046 --> 00:32:18,170
ni kwenda kuwa nini
aitwaye null Terminator.

716
00:32:18,170 --> 00:32:19,990
Ni si kwenda kwa kweli
zipo katika safu.

717
00:32:19,990 --> 00:32:21,781
Na kompyuta ni
si kwenda kama hiyo.

718
00:32:21,781 --> 00:32:24,570
Hivyo kuwa makini wakati wowote
wewe ni kupata mambo tu

719
00:32:24,570 --> 00:32:28,070
kuhakikisha kwamba unakumbuka
kuwa arrays ni sifuri indexed.

720
00:32:28,070 --> 00:32:28,880
>> SAWA.

721
00:32:28,880 --> 00:32:34,030
Hivyo mfano wa kwanza ni
njia mojawapo ya kujenga safu.

722
00:32:34,030 --> 00:32:36,790
Mfano wa pili nina
chini ni njia tu tofauti

723
00:32:36,790 --> 00:32:40,210
ya kujenga kile ni sawa data
muundo kwamba tumekuwa tu inputted.

724
00:32:40,210 --> 00:32:44,347
Hivyo badala ya kimwili mbio
kupitia na kuweka katika hali ya joto ya 0

725
00:32:44,347 --> 00:32:47,180
sawa chochote, joto 1
sawa chochote, joto 2 sawa

726
00:32:47,180 --> 00:32:50,950
chochote, mimi naweza kweli tu
moja kwa moja kujenga kila kitu katika mstari mmoja

727
00:32:50,950 --> 00:32:53,010
ndani ya joto mabano mraba sawa.

728
00:32:53,010 --> 00:32:56,536
>> Na taarifa katika kesi hiyo, huna haja
kutaja jinsi kubwa safu yako ni,

729
00:32:56,536 --> 00:32:59,160
kwa sababu kompyuta kinaendelea
kwenda kwa njia na kuona kwamba kuna

730
00:32:59,160 --> 00:33:01,570
mambo matatu katika braces wale curly.

731
00:33:01,570 --> 00:33:04,000
Na itakuja kujua, sawa,
Mimi haja safu ya ukubwa 3.

732
00:33:04,000 --> 00:33:07,440
Wewe si kwenda haja ya
pembejeo njia zifuatazo.

733
00:33:07,440 --> 00:33:10,170
>> Na pia, ndio, kwa njia hiyo.

734
00:33:10,170 --> 00:33:12,610
Je, mtu yeyote una maswali
kuhusu jinsi sisi kufanya arrays

735
00:33:12,610 --> 00:33:17,391
au jinsi muundo wa safu kazi?

736
00:33:17,391 --> 00:33:17,890
Naam.

737
00:33:17,890 --> 00:33:18,806
>> Watazamaji: [inaudible]?

738
00:33:18,806 --> 00:33:21,649

739
00:33:21,649 --> 00:33:22,690
ANDI PENG: Yeah, kwa uhakika.

740
00:33:22,690 --> 00:33:26,150
Hivyo kama ungekuwa kutangaza na initialize
safu njia ifuatayo,

741
00:33:26,150 --> 00:33:28,477
ambayo ni njia ya pili,
unaweza kuacha tu wale.

742
00:33:28,477 --> 00:33:30,310
Na kompyuta
moja kwa moja anajua kwamba

743
00:33:30,310 --> 00:33:33,950
mahitaji ya kuhesabu mambo mangapi
ni katika braces wale curly, kutengwa

744
00:33:33,950 --> 00:33:34,930
kwa koma.

745
00:33:34,930 --> 00:33:37,517
>> Hivyo hapa wanachokiona 65, 87, 30.

746
00:33:37,517 --> 00:33:39,600
Hivyo kompyuta anajua, loo,
kuna integers tatu.

747
00:33:39,600 --> 00:33:45,960
Najua kujenga jina safu
joto na mambo matatu ndani yake.

748
00:33:45,960 --> 00:33:46,590
Nzuri swali.

749
00:33:46,590 --> 00:33:47,090
Naam.

750
00:33:47,090 --> 00:33:51,590
>> Watazamaji: Je, si hivyo inawezekana kujenga
safu na aina tofauti ya data

751
00:33:51,590 --> 00:33:53,021
ambayo inaweza kuwa aliingia ndani yake?

752
00:33:53,021 --> 00:33:56,746
Kwa mfano, kwa integers [inaudible]?

753
00:33:56,746 --> 00:33:59,120
ANDI PENG: Kwa madhumuni
ya darasa hili, hapana, hivi sasa.

754
00:33:59,120 --> 00:34:03,070
Wakati kujenga data
muundo kama safu,

755
00:34:03,070 --> 00:34:04,990
wewe ni kuwaambia
kompyuta, hey, mimi haja wewe

756
00:34:04,990 --> 00:34:08,159
kutenga kiasi hiki
kumbukumbu katika gari yangu ngumu,

757
00:34:08,159 --> 00:34:10,690
na kila kiini kuwa
baadhi idadi ya bits.

758
00:34:10,690 --> 00:34:13,429
>> Kumbuka tulijifunza katika wiki
sifuri kwamba data mbalimbali

759
00:34:13,429 --> 00:34:15,300
aina na ukubwa tofauti?

760
00:34:15,300 --> 00:34:17,630
Hivyo kwa mfano, kamba
ni kiasi tofauti

761
00:34:17,630 --> 00:34:20,719
ya nafasi ya Char, ambayo
ni kiasi tofauti ya nafasi

762
00:34:20,719 --> 00:34:21,830
kutoka integer.

763
00:34:21,830 --> 00:34:25,534
Na hivyo kama huna bayana na wewe
kuchanganya na mechi ni aina gani ya vigezo

764
00:34:25,534 --> 00:34:27,659
una, kompyuta
kwenda kuwa kuchanganyikiwa sana.

765
00:34:27,659 --> 00:34:29,950
Na si kwenda kujua
kiasi gani kumbukumbu kukupa.

766
00:34:29,950 --> 00:34:32,480
Hivyo kwa madhumuni ya haki
sasa, kompyuta inaweza tu

767
00:34:32,480 --> 00:34:36,120
kutambua aina moja ya safu.

768
00:34:36,120 --> 00:34:37,940
Nzuri swali.

769
00:34:37,940 --> 00:34:38,440
SAWA.

770
00:34:38,440 --> 00:34:45,179

771
00:34:45,179 --> 00:34:47,120
>> Hivyo asili,
Swali la pili tuna

772
00:34:47,120 --> 00:34:50,760
ni, vizuri, sasa kuwa tumeunda
safu na tumekuwa kuweka mambo yote haya

773
00:34:50,760 --> 00:34:54,190
katika safu, jinsi ni sisi
kwenda kuwa na uwezo wa kupata huduma hiyo?

774
00:34:54,190 --> 00:34:59,710
Hivyo muundo wa kawaida kwamba sisi daima
kupata safu ni nzuri yetu kwa kitanzi.

775
00:34:59,710 --> 00:35:03,830
Mimi ahadi nyie kwamba tutaweza kuwa
kuona mengi ya huyu hapa.

776
00:35:03,830 --> 00:35:06,470
>> Kimsingi, wakati wowote unataka
pembejeo maadili katika safu

777
00:35:06,470 --> 00:35:09,940
au unataka kupata yao,
njia bora ya kufanya hivyo ni kwa kitanzi,

778
00:35:09,940 --> 00:35:13,730
kwa sababu katika kwa kitanzi, wewe
kujua ni mara ngapi uko

779
00:35:13,730 --> 00:35:17,290
atataka kukimbia kwa njia ya safu,
kwa sababu una kuacha toleo, sawa?

780
00:35:17,290 --> 00:35:19,680
Na kila wakati wewe kukimbia
kupitia, unaweza kupata

781
00:35:19,680 --> 00:35:21,310
kipengele tofauti ya safu.

782
00:35:21,310 --> 00:35:26,920
>> Na pia, hii ni sababu ni kwa nini kwa kawaida
sisi kuanza yetu kwa mizunguko saa 0 thamani,

783
00:35:26,920 --> 00:35:30,080
kwa sababu wakati wewe kupata arrays,
unaweza kupata sifuri ripoti.

784
00:35:30,080 --> 00:35:32,070
Na hivyo sambamba vizuri mno.

785
00:35:32,070 --> 00:35:35,295
Nyie huenda alitaka
kuandika kwa int i sawa 1.

786
00:35:35,295 --> 00:35:37,330
i ni chini ya au sawa na 3.

787
00:35:37,330 --> 00:35:39,890
>> Lakini itakuwa si kazi kabisa kama
vizuri hapa, kwa sababu wewe tu

788
00:35:39,890 --> 00:35:42,010
na mambo ya 0, 1, na 2.

789
00:35:42,010 --> 00:35:45,815
Na hivyo kama ungekuwa kuanza
i wako katika kipengele 1, 2, na 3,

790
00:35:45,815 --> 00:35:48,440
wewe ni kwenda kuishia mbio
nje ya mipaka ya safu yako,

791
00:35:48,440 --> 00:35:50,440
na mambo mabaya ni kwenda kutokea.

792
00:35:50,440 --> 00:35:54,480
>> Kwa hiyo, natumaini nyie angalia segue
kwa nini katika madarasa ya awali

793
00:35:54,480 --> 00:35:58,560
tulikuwa nyie kufundisha jinsi ya kuendesha na
muundo kwa kitanzi kwa njia hiyo tulikuwa.

794
00:35:58,560 --> 00:36:01,900
Ni kwa sababu, sasa tumekuwa
zilianza katika arrays,

795
00:36:01,900 --> 00:36:06,760
unaweza kuona kwa nini 0 lends
yenyewe vizuri mno kwa kupata.

796
00:36:06,760 --> 00:36:09,880
>> Hivyo njia sisi kufanya hivyo ni that-- mimi nina
tu uchapishaji ni nje hapa kwa ajili

797
00:36:09,880 --> 00:36:10,830
ya uchapishaji nje.

798
00:36:10,830 --> 00:36:13,750
Lakini nina placeholder yangu, comma.

799
00:36:13,750 --> 00:36:15,645
Na upatikanaji halisi
sehemu kinachotokea.

800
00:36:15,645 --> 00:36:17,520
Jina la safu
aliitwa joto.

801
00:36:17,520 --> 00:36:21,570
Hivyo ni joto na
i-th kipengele cha safu.

802
00:36:21,570 --> 00:36:24,400
>> Hivyo kama kwa kitanzi anaendesha kwa njia,
ni kwenda kuanza saa 0.

803
00:36:24,400 --> 00:36:27,640
Ni kwenda magazeti nje
0 ripoti ya safu hii.

804
00:36:27,640 --> 00:36:29,599
Basi ni kwenda magazeti
nje kitu cha kwanza.

805
00:36:29,599 --> 00:36:31,431
Basi ni kwenda magazeti
nje moja ya pili.

806
00:36:31,431 --> 00:36:32,880
Na kisha tunakwenda kuvunja.

807
00:36:32,880 --> 00:36:36,718
Ni wazi juu ya kila mtu
jinsi yale yanayotokea?

808
00:36:36,718 --> 00:36:37,217
Kubwa.

809
00:36:37,217 --> 00:36:43,230

810
00:36:43,230 --> 00:36:44,100
>> Sawa.

811
00:36:44,100 --> 00:36:47,270
Hivyo hapa tuna njia ya
akisema, ikiwa hatukutaka

812
00:36:47,270 --> 00:36:50,020
ngumu-code in-- mimi kama programu.

813
00:36:50,020 --> 00:36:53,320
Sikutaka kwa kweli kimwili
kuweka katika kila kipengele binafsi

814
00:36:53,320 --> 00:36:54,020
wa safu hii.

815
00:36:54,020 --> 00:36:56,500
Kama nilitaka badala
na maadili ya pembejeo user,

816
00:36:56,500 --> 00:36:58,100
nini njia bora ya kufanya hivyo?

817
00:36:58,100 --> 00:37:00,920
>> Naam, hapa mimi tumemuumba
kazi hii ya kupendeza,

818
00:37:00,920 --> 00:37:03,560
ambao siwezi kutangaza safu.

819
00:37:03,560 --> 00:37:06,210
Hivyo int scores-- hebu
tu kusema tunataka kufanya

820
00:37:06,210 --> 00:37:10,660
safu kwamba uliofanyika darasa la zote 18
ya wanafunzi hapa katika sehemu hii.

821
00:37:10,660 --> 00:37:12,670
Nadhani sisi tumepewa kidogo
watoto zaidi ya 18 leo.

822
00:37:12,670 --> 00:37:16,460
Lakini kwa ajili mfano wa,
hebu tu kudhani tulikuwa 18.

823
00:37:16,460 --> 00:37:21,580
Napenda kuunda alama jina safu na
aina int, kwa sababu alama, bila shaka,

824
00:37:21,580 --> 00:37:22,987
ni namba.

825
00:37:22,987 --> 00:37:24,820
Na mimi nina kwenda kuwa na
18 katika mabano mraba,

826
00:37:24,820 --> 00:37:29,900
kwa sababu hiyo ni jinsi wengi mimi wanafunzi
wanataka kuwa na uwezo wa kuhifadhi alama ya.

827
00:37:29,900 --> 00:37:32,206
>> Na njia Ningependa idadi
safu ni kwamba Ningependa

828
00:37:32,206 --> 00:37:35,572
kukimbia kwa njia ya kitanzi, ya
Bila shaka, kwa kuwa 0 0 ripoti yangu.

829
00:37:35,572 --> 00:37:38,030
Na kisha kwa 18 akiwa yangu
kuacha toleo, kwa sababu kuna

830
00:37:38,030 --> 00:37:39,690
Mambo 18 katika safu.

831
00:37:39,690 --> 00:37:44,620
Na kisha mimi nina kwenda kufanya printf, kuingia
alama kwa student-- yada yada yada.

832
00:37:44,620 --> 00:37:51,171
>> Yeyote anaweza kuniambia kwa nini hapa mimi nina
uchapishaji i pamoja na 1 na si i?

833
00:37:51,171 --> 00:37:52,920
Ni aina ya hila
swali, si kweli.

834
00:37:52,920 --> 00:37:56,020
Haina kweli kimwili
kuathiri uendeshaji wa kificho.

835
00:37:56,020 --> 00:37:56,520
Naam.

836
00:37:56,520 --> 00:37:57,909
>> Watazamaji: [inaudible] 0?

837
00:37:57,909 --> 00:37:58,950
ANDI PENG: Yeah, kwa uhakika.

838
00:37:58,950 --> 00:38:02,620
Ni kidogo Awkward kusema, hey,
wewe ni mwanafunzi 0 katika darasa hili.

839
00:38:02,620 --> 00:38:03,780
Ni kidogo weird.

840
00:38:03,780 --> 00:38:08,340
Sisi hivi, kama binadamu, si kweli kama
kufikiria jinsi ya kompyuta kufikiri.

841
00:38:08,340 --> 00:38:10,930
Hivyo hata kama katika
kompyuta, ni hifadhi ya maadili

842
00:38:10,930 --> 00:38:13,310
katika 0-th ripoti, wakati
tuko binadamu, sisi si kweli

843
00:38:13,310 --> 00:38:15,520
kama kwa kutaja wenyewe kama sifuri.

844
00:38:15,520 --> 00:38:18,119
Hivyo wakati mimi tu magazeti kwamba,
Mimi nina kwenda magazeti na kuongeza

845
00:38:18,119 --> 00:38:19,410
1 tu kwa ajili ya ufafanuzi.

846
00:38:19,410 --> 00:38:22,447
Hivyo wakati mimi magazeti, mimi nina kwenda kuwa
uwezo wa magazeti ya wanafunzi 1 kwa njia ya 18.

847
00:38:22,447 --> 00:38:24,530
Haina kweli athari
uendeshaji wa kanuni

848
00:38:24,530 --> 00:38:27,110
kwa njia yoyote ile, njia mimi magazeti.

849
00:38:27,110 --> 00:38:30,380
>> Lakini kuwa makini wakati uko
kweli kupata safu.

850
00:38:30,380 --> 00:38:32,780
Baada ya kuona alama i,
taarifa hapa mimi nina kweli

851
00:38:32,780 --> 00:38:38,200
kupata 0 ripoti na
si 1 pamoja na 0-- au 1 plus 1,

852
00:38:38,200 --> 00:38:45,530
katika kesi hiyo, ripoti hiyo
kwamba ni kweli wazi.

853
00:38:45,530 --> 00:38:48,870
Ni kila mtu wa aina sawa ya
jinsi hii ni mbio kwa njia ya

854
00:38:48,870 --> 00:38:51,470
na kwa kila ripoti mimi nina
kuweka thamani katika safu

855
00:38:51,470 --> 00:38:55,340
na kujenga safu na namba 18
kwamba mtumiaji ni kwenda pembejeo?

856
00:38:55,340 --> 00:38:58,780

857
00:38:58,780 --> 00:38:59,821
SAWA.

858
00:38:59,821 --> 00:39:00,321
Baridi.

859
00:39:00,321 --> 00:39:05,380

860
00:39:05,380 --> 00:39:07,400
>> SAWA.

861
00:39:07,400 --> 00:39:12,220
Sisi sasa kuhamia katika kitu ambacho ni pretty
husika kwa ajili kipande hii kuweka pamoja.

862
00:39:12,220 --> 00:39:15,020
Najua katika hotuba, David--
pole, alikuwa swali?

863
00:39:15,020 --> 00:39:16,840
>> Watazamaji: Je, unaweza kupanua yake?

864
00:39:16,840 --> 00:39:18,080
>> ANDI PENG: Yeah, hivyo mimi walijaribu.

865
00:39:18,080 --> 00:39:18,788
Lakini sijui.

866
00:39:18,788 --> 00:39:21,437
Kwa sababu fulani, hii
toleo la PowerPoint

867
00:39:21,437 --> 00:39:23,270
ni kweli si kazi
vizuri na kuonyesha.

868
00:39:23,270 --> 00:39:25,260
Hivyo sisi ni kwenda tu
kuitunza kama hii.

869
00:39:25,260 --> 00:39:27,280
Hayo yote itakuwa uploaded online.

870
00:39:27,280 --> 00:39:28,218
Samahani, nyie.

871
00:39:28,218 --> 00:39:30,090
Naam.

872
00:39:30,090 --> 00:39:30,980
SAWA.

873
00:39:30,980 --> 00:39:35,530
>> Ili tuweze pia kuwa masharti.

874
00:39:35,530 --> 00:39:39,320
Hivyo kama wewe guys kweli notice-- mimi
kujua Rob wakaenda upande wa pili huu katika hotuba kwamba

875
00:39:39,320 --> 00:39:43,652
kuwa yeye did-- kamba ni kweli
tu safu ya wahusika,

876
00:39:43,652 --> 00:39:44,860
kama wewe kufikiri juu yake, sawa?

877
00:39:44,860 --> 00:39:47,500
Kamba ni jina au a
hukumu au neno, sawa?

878
00:39:47,500 --> 00:39:52,975
>> Kama ningekuwa kujenga kamba aitwaye
Andi-- jina tu wangu,-N-D-I.

879
00:39:52,975 --> 00:39:55,460
Unafikiri ya kwamba kama kigezo kimoja tu.

880
00:39:55,460 --> 00:39:58,630
Lakini kwa kweli, ni kuvunjwa chini
ndani ya tu safu ya chars.

881
00:39:58,630 --> 00:40:01,910
Hivyo ni got tabia ya
kuhifadhiwa katika thamani safu.

882
00:40:01,910 --> 00:40:05,420
Ni got tabia ya N kuhifadhiwa katika
pili ripoti na kadhalika na kadhalika.

883
00:40:05,420 --> 00:40:08,660
>> Hivyo katika njia hiyo, sisi
kweli kuwa aina hii

884
00:40:08,660 --> 00:40:10,970
muundo wa kuweka katika
mahali kwa masharti yetu.

885
00:40:10,970 --> 00:40:14,660
Hivyo hapa, kama ningekuwa pembejeo
neno "kula" - hivyo kamba neno ni sawa na

886
00:40:14,660 --> 00:40:15,540
kupata kamba.

887
00:40:15,540 --> 00:40:19,260
Kama ningekuwa na pembejeo neno "kula," kwamba
ni kimwili kwa njia hiyo kompyuta yangu

888
00:40:19,260 --> 00:40:21,870
ni hifadhi ya kwamba kamba katika kumbukumbu yangu.

889
00:40:21,870 --> 00:40:27,140
>> Na kama nilitaka kukimbia kwa njia ya kwamba
na magazeti kwamba out-- hivyo kwa ndani i

890
00:40:27,140 --> 00:40:30,890
sawa sifuri, kumbuka, katika hotuba, sisi
kitu kufunikwa kwamba wito strlen,

891
00:40:30,890 --> 00:40:32,990
au urefu wa kamba.

892
00:40:32,990 --> 00:40:36,520
Kwa sababu mimi si kweli
kujua jinsi kubwa safu ni

893
00:40:36,520 --> 00:40:38,210
ya chochote mtumiaji inputting--

894
00:40:38,210 --> 00:40:40,370
>> Kwa mfano, mimi inputted
neno "kula," na najua

895
00:40:40,370 --> 00:40:41,870
hiyo ni herufi tatu kwa muda mrefu, sawa?

896
00:40:41,870 --> 00:40:44,700
Ili niweze kuweka katika tatu huko
na kila kitu itakuwa vizuri.

897
00:40:44,700 --> 00:40:49,290
Lakini kama pembejeo mtumiaji wako kitu
hiyo ni idadi tofauti ya maadili,

898
00:40:49,290 --> 00:40:52,760
wewe ni kwenda kuwa na uwezo wa kweli
tunajua kwamba wakati wewe mpango kanuni yako.

899
00:40:52,760 --> 00:40:56,040
>> Hivyo njia kwamba sisi kushughulikia kesi mtihani
kama kwamba ni kwamba tuna kitu

900
00:40:56,040 --> 00:41:00,070
aitwaye strlen, ambayo ni tu kazi
kwamba anaelezea kwa muda gani kamba ni.

901
00:41:00,070 --> 00:41:02,080
Hivyo strlen ya neno.

902
00:41:02,080 --> 00:41:03,470
Neno langu ni kula.

903
00:41:03,470 --> 00:41:05,990
n sawa na strlen ya neno.

904
00:41:05,990 --> 00:41:08,930
Je, mtu kuniambia nini kwamba
thamani kweli ni haki pale?

905
00:41:08,930 --> 00:41:12,550
Je N anayewakilisha sahihi
sasa, katika mfano huu, kama ningekuwa na chakula?

906
00:41:12,550 --> 00:41:13,530
>> Watazamaji: 3.

907
00:41:13,530 --> 00:41:14,520
>> ANDI PENG: 3, hasa.

908
00:41:14,520 --> 00:41:18,820
Hivyo tuna kwa int i sawa
sifuri, n sawa na 3, kimsingi.

909
00:41:18,820 --> 00:41:22,355
Na i ni kwenda kukimbia
mpaka ni chini ya 3i ++.

910
00:41:22,355 --> 00:41:24,980
Na itakuja kimsingi kwenda
kupitia na kufanya kitu kimoja.

911
00:41:24,980 --> 00:41:26,979
Ni kwenda magazeti nje
kila thamani na kukupa

912
00:41:26,979 --> 00:41:29,700
E-A-T. Ni denoting tu
njia mbalimbali za kuandika hayo.

913
00:41:29,700 --> 00:41:31,170
Hiyo inaenda kuwa na manufaa sana.

914
00:41:31,170 --> 00:41:31,670
Naam.

915
00:41:31,670 --> 00:41:35,174
Watazamaji: Nini faida ya kuweka
n sawa na strlen neno ndani ya kwamba

916
00:41:35,174 --> 00:41:36,894
kwa kitanzi [inaudible]?

917
00:41:36,894 --> 00:41:37,560
ANDI PENG: Naam.

918
00:41:37,560 --> 00:41:44,880
Hivyo kama ningekuwa to-- kusema, kwa mfano,
kama ningekuwa kufanya hivyo na kisha

919
00:41:44,880 --> 00:41:51,935
do-- oop-- kwamba, katika kanuni yangu, ingekuwa
kweli kuwa kufanya kama kitu kimoja.

920
00:41:51,935 --> 00:41:55,060
Hata hivyo, njia ambayo Daudi alieleza
ni wakati wa hotuba, kama wapo ya nyie

921
00:41:55,060 --> 00:41:57,854
kumbuka, ni kwamba, kama
binadamu, kama programmers,

922
00:41:57,854 --> 00:42:00,270
sisi kweli kujaribu mpango wetu
kificho ili kompyuta yetu ina

923
00:42:00,270 --> 00:42:04,070
kufanya kazi kama ndogo kama iwezekanavyo, ili
kwamba kanuni zetu ni ufanisi sana.

924
00:42:04,070 --> 00:42:06,850
>> Hivyo kama mimi alikuwa kwamba kuna, nini
lingetokea kwa njia yangu kwa kitanzi

925
00:42:06,850 --> 00:42:10,790
ni kwamba Ningependa kwanza kutangaza
kutofautiana aitwaye i ni kwenda kuwa 0.

926
00:42:10,790 --> 00:42:13,350
Mimi ni kwenda kuangalia, loo,
kile ni strlen ya neno?

927
00:42:13,350 --> 00:42:15,000
Loo, strlen ni 3.

928
00:42:15,000 --> 00:42:16,191
Hivyo ni i chini ya tatu?

929
00:42:16,191 --> 00:42:16,690
Ndiyo, ni.

930
00:42:16,690 --> 00:42:17,870
Mimi nina kwenda kukimbia.

931
00:42:17,870 --> 00:42:21,130
>> Na kisha mara ya pili nyuma karibu
kitanzi, mimi nina kwenda increment i.

932
00:42:21,130 --> 00:42:22,550
i ni kwenda kuwa moja.

933
00:42:22,550 --> 00:42:25,600
Na i ni kwenda kuangalia, loo,
lakini nini strlen ya neno?

934
00:42:25,600 --> 00:42:26,839
Oh, ni tatu.

935
00:42:26,839 --> 00:42:29,880
Na anafanya kwamba wanaonekana aina ya fujo,
kila wakati wewe kukimbia kwa njia ya kitanzi,

936
00:42:29,880 --> 00:42:33,340
kuwa kuangalia kazi,
hata kama strlen ya neno

937
00:42:33,340 --> 00:42:35,490
kamwe kweli mabadiliko?

938
00:42:35,490 --> 00:42:38,590
>> Hivyo ni nguvu ya ziada kwa kompyuta.

939
00:42:38,590 --> 00:42:42,180
Baada ya kuanza kuzungumza juu ya mambo
ambazo ni mabilioni na mabilioni

940
00:42:42,180 --> 00:42:44,431
na mabilioni ya maeneo
muda mrefu, kufikiria kompyuta yako

941
00:42:44,431 --> 00:42:47,430
kuwa na kimwili kwenda kwa njia na
kuangalia yote ya kwamba kila wakati.

942
00:42:47,430 --> 00:42:53,170
Hii ndiyo sababu, kufanya tu
kwa ajili ya ufanisi,

943
00:42:53,170 --> 00:42:57,620
sisi huwa na tu kufanya hivyo,
kwa sababu kwa njia hii tuko tu

944
00:42:57,620 --> 00:42:59,850
wito kazi
mara moja katika mwanzo,

945
00:42:59,850 --> 00:43:01,766
na kwamba kila wakati
huenda kwa njia ya itakuja

946
00:43:01,766 --> 00:43:03,789
kuhifadhi thamani 3
pale, kwamba huna

947
00:43:03,789 --> 00:43:05,330
na kuendelea kuangalia kila wakati.

948
00:43:05,330 --> 00:43:05,743
Naam.

949
00:43:05,743 --> 00:43:06,409
>> Watazamaji: Sorry.

950
00:43:06,409 --> 00:43:09,070
Tu [inaudible].

951
00:43:09,070 --> 00:43:13,985
Je, unaweza kufanya int n sawa na strlen na kuweka
kuwa juu nje ya kwa kitanzi

952
00:43:13,985 --> 00:43:15,364
vile vile?

953
00:43:15,364 --> 00:43:16,030
ANDI PENG: Naam.

954
00:43:16,030 --> 00:43:17,100
Unaweza kufanya hivyo, kabisa.

955
00:43:17,100 --> 00:43:19,970
Sababu sisi kuwa nayo katika hapa ni
kwa sababu njia a kwa kitanzi matendo

956
00:43:19,970 --> 00:43:23,500
ni kwamba ni kuitwa
kutofautiana ndani kwa maana ya

957
00:43:23,500 --> 00:43:26,150
kwamba kila kitu uko
kujenga ndani ya kwa kitanzi

958
00:43:26,150 --> 00:43:27,890
tu ipo ndani ya kwa kitanzi.

959
00:43:27,890 --> 00:43:31,530
>> Hivyo kutofautiana i tu
ipo katika mabano hayo.

960
00:43:31,530 --> 00:43:35,260
Na hapa vigezo ya n pia
tu ipo katika mabano hayo.

961
00:43:35,260 --> 00:43:39,350
Hivyo kama ungekuwa kutumia strlen ya
neno mara nyingi chini chini,

962
00:43:39,350 --> 00:43:42,230
kabisa njia bora ya kufanya hivyo
itakuwa kutangaza it up juu

963
00:43:42,230 --> 00:43:43,563
hivyo huna kufanya hivyo mara moja.

964
00:43:43,563 --> 00:43:45,420
Naam.

965
00:43:45,420 --> 00:43:47,670
Watazamaji: Kwa nini una
mstari mpya baada ya asilimia

966
00:43:47,670 --> 00:43:51,300
kuona kama unataka kuweka yote
barua yake ijayo kutenganisha?

967
00:43:51,300 --> 00:43:54,140
>> ANDI PENG: Oh, nilitaka
magazeti yao yote juu ya kila mstari.

968
00:43:54,140 --> 00:43:54,890
Haijalishi.

969
00:43:54,890 --> 00:43:55,890
Yeah, ni formatting.

970
00:43:55,890 --> 00:43:57,181
Hilo ni swali zuri, ingawa.

971
00:43:57,181 --> 00:43:59,360
Naam, ikiwa mimi alitaka magazeti
yote kwenye mstari mmoja tu,

972
00:43:59,360 --> 00:44:02,731
Mimi bila kuwa dash katika.

973
00:44:02,731 --> 00:44:03,230
SAWA.

974
00:44:03,230 --> 00:44:06,880
Kila mtu mwema?

975
00:44:06,880 --> 00:44:07,500
SAWA.

976
00:44:07,500 --> 00:44:08,000
Baridi.

977
00:44:08,000 --> 00:44:12,080

978
00:44:12,080 --> 00:44:14,750
>> Hivyo nadhani nimenena kutosha.

979
00:44:14,750 --> 00:44:20,040
Nyie zamu ya kukimbia kwa njia ya
kanuni na kuniambia nini ni vibaya hapa.

980
00:44:20,040 --> 00:44:21,560
Wapi mdudu?

981
00:44:21,560 --> 00:44:26,920
Hivyo kama unaweza kuona, nimekuwa alitangaza
safu mpya ya kamba aina aitwaye darasani.

982
00:44:26,920 --> 00:44:30,220
Na nimekuwa inputted Sam,
Jess, na Kim ndani yake.

983
00:44:30,220 --> 00:44:33,400
Na mimi nina kujaribu magazeti nje
mambo yote ya safu.

984
00:44:33,400 --> 00:44:36,796
Je, mtu kuniambia kwa nini hii
ni kwenda kunipa matatizo?

985
00:44:36,796 --> 00:44:39,320
Mimi nitakupa guys 10
sekunde kufikiri kuhusu hili.

986
00:44:39,320 --> 00:44:55,490

987
00:44:55,490 --> 00:44:56,619
>> SAWA.

988
00:44:56,619 --> 00:44:57,118
Yeah?

989
00:44:57,118 --> 00:45:01,972
>> Watazamaji: Je, kituo cha kushoto
sawa na 3 au [inaudible]?

990
00:45:01,972 --> 00:45:02,680
ANDI PENG: Haki.

991
00:45:02,680 --> 00:45:06,784
Hivyo ni mara ngapi ni kweli hii
kwenda kukimbia kwa njia ya kitanzi hii?

992
00:45:06,784 --> 00:45:07,620
>> Watazamaji: Nne.

993
00:45:07,620 --> 00:45:08,070
>> ANDI PENG: Hasa.

994
00:45:08,070 --> 00:45:09,445
Ni kwenda na njia ya mara nne.

995
00:45:09,445 --> 00:45:12,250
Ni kwenda kukimbia kwa njia ya
saa 0, 1, 2, na 3,

996
00:45:12,250 --> 00:45:15,200
kwa sababu ya kipengele yao ni i
ni chini ya au sawa na 3.

997
00:45:15,200 --> 00:45:16,960
Ni si kwenda kuacha wakati ni 2.

998
00:45:16,960 --> 00:45:18,800
Ni kwenda kuweka
kwenda mpaka hits 3.

999
00:45:18,800 --> 00:45:21,720
Na kama tunajua, kuna tatu tu
vipengele katika safu yetu halisi.

1000
00:45:21,720 --> 00:45:27,260
>> Kama sisi kujaribu kupata nne
kipengele au ripoti ya 3,

1001
00:45:27,260 --> 00:45:30,357
wewe ni kwenda kugonga mahali fulani
katika kumbukumbu hiyo haipo.

1002
00:45:30,357 --> 00:45:31,690
Ni wito null Terminator.

1003
00:45:31,690 --> 00:45:32,856
Hakuna kitu kinaendelea kuwa huko.

1004
00:45:32,856 --> 00:45:35,324
Kompyuta yako si kwenda
kuwa na furaha sana na wewe.

1005
00:45:35,324 --> 00:45:36,170
Naam.

1006
00:45:36,170 --> 00:45:38,430
Je, mtu yeyote una maswali
juu ya nini kwamba kilichojitokeza?

1007
00:45:38,430 --> 00:45:39,679
Hiyo ni eneo la kawaida ili kuepuka.

1008
00:45:39,679 --> 00:45:40,712
Naam.

1009
00:45:40,712 --> 00:45:45,777
>> Watazamaji: Je, si kwanza
slide pia kuwa kamba ya 2?

1010
00:45:45,777 --> 00:45:46,360
ANDI PENG: Hapana

1011
00:45:46,360 --> 00:45:49,610
Hivyo kimsingi, wakati
wewe ni kufanya safu,

1012
00:45:49,610 --> 00:45:51,540
kwamba mabano haki
pale, kwamba number-- zote

1013
00:45:51,540 --> 00:45:53,480
ni kuwaambia wewe ni jinsi
mambo mengi nina.

1014
00:45:53,480 --> 00:45:55,840
Siyo kweli kuwaambia
mimi bahati ya kitu chochote.

1015
00:45:55,840 --> 00:45:58,760
Hivyo katika kesi hii, najua nataka
kuandika na maeneo matatu,

1016
00:45:58,760 --> 00:46:02,690
na maeneo matatu ya kimwili kwa
kushikilia chochote mimi nataka kushikilia.

1017
00:46:02,690 --> 00:46:04,510
Hivyo ndiyo sababu namba tatu ni pale.

1018
00:46:04,510 --> 00:46:06,560
Hata hivyo, kama nilitaka
kwa kweli kupata hiyo,

1019
00:46:06,560 --> 00:46:11,220
kama nilitaka kusema, printf
tabaka la mabano idadi, kisha

1020
00:46:11,220 --> 00:46:14,560
wewe ni kwenda kweli kuweka
ripoti kimwili huko.

1021
00:46:14,560 --> 00:46:16,330
Yeah, swali zuri.

1022
00:46:16,330 --> 00:46:20,065
>> Watazamaji: Hivyo ni kimwili
ripoti zinatakiwa kuwa [inaudible]?

1023
00:46:20,065 --> 00:46:20,940
ANDI PENG: Samahani.

1024
00:46:20,940 --> 00:46:21,500
Je, unaweza kuongea kidogo?

1025
00:46:21,500 --> 00:46:24,208
>> Watazamaji: Hivyo ni ripoti kimwili
[Inaudible] kila mmoja masanduku?

1026
00:46:24,208 --> 00:46:25,260
[Inaudible]?

1027
00:46:25,260 --> 00:46:26,040
>> ANDI PENG: Naam.

1028
00:46:26,040 --> 00:46:28,970
Hivyo nina kwenda na kurudi hapa hapa.

1029
00:46:28,970 --> 00:46:31,120
Fikiria haki hapa.

1030
00:46:31,120 --> 00:46:32,820
Tuna safu ya ukubwa 3.

1031
00:46:32,820 --> 00:46:35,540
Kuna maeneo matatu, kama,
placeholders kimwili katika hapa.

1032
00:46:35,540 --> 00:46:37,620
Lakini wao ni jina lake 0, 1, na 2.

1033
00:46:37,620 --> 00:46:40,700
Hivyo kama nilitaka kupata huduma hizo,
njia ambayo mimi kuzipata

1034
00:46:40,700 --> 00:46:43,480
ni printf wa chochote nilitaka katika hapa.

1035
00:46:43,480 --> 00:46:45,485
Ingekuwa magazeti
nje jina lake,

1036
00:46:45,485 --> 00:46:47,610
kwa sababu kisha kompyuta
anajua, loo, mimi haja ya kuangalia

1037
00:46:47,610 --> 00:46:51,391
katika safu hii kwa 0 index.

1038
00:46:51,391 --> 00:46:51,890
Naam.

1039
00:46:51,890 --> 00:46:53,306
Lakini ukubwa wa haina mabadiliko.

1040
00:46:53,306 --> 00:46:55,492
Ukubwa ni 3, bila kujali
ya jinsi studio yao.

1041
00:46:55,492 --> 00:46:58,321

1042
00:46:58,321 --> 00:46:58,820
SAWA.

1043
00:46:58,820 --> 00:47:01,387
Kila mtu mwema?

1044
00:47:01,387 --> 00:47:02,970
Watazamaji: Hivyo kila wakati mimi [inaudible]?

1045
00:47:02,970 --> 00:47:06,357

1046
00:47:06,357 --> 00:47:06,940
ANDI PENG: Sawa.

1047
00:47:06,940 --> 00:47:13,270
Hivyo katika kesi hii, sisi si kweli
kupata ndani yake hivi sasa katika mwendo.

1048
00:47:13,270 --> 00:47:16,760
Lakini tunajua kwamba kamba kama mimi
Alisema kabla, kamba kimsingi ni

1049
00:47:16,760 --> 00:47:18,440
safu ya wahusika.

1050
00:47:18,440 --> 00:47:21,430
Hivyo kama mimi kuunda safu
ya masharti, mimi aina ya

1051
00:47:21,430 --> 00:47:24,430
safu ya safu
ya wahusika, sawa?

1052
00:47:24,430 --> 00:47:27,720
>> Hivyo katika kesi hii, kwa sababu mimi
na safu ya masharti,

1053
00:47:27,720 --> 00:47:31,340
kama ungekuwa na pembejeo neno kweli kwa muda mrefu,
kwamba bado unachukua nafasi moja tu,

1054
00:47:31,340 --> 00:47:33,230
kwa sababu hiyo ni kamba moja.

1055
00:47:33,230 --> 00:47:37,492
Lakini kama ungekuwa na kufikiria
wahusika wa kwamba safu,

1056
00:47:37,492 --> 00:47:40,450
kisha hiyo kuchukua mengi zaidi
wahusika kuliko yoyote ya maneno mengine

1057
00:47:40,450 --> 00:47:41,372
ni.

1058
00:47:41,372 --> 00:47:42,830
Si kweli ni muhimu kwa hivi sasa.

1059
00:47:42,830 --> 00:47:44,921
Lakini hiyo ni kwa ujumla
jinsi ni kazi.

1060
00:47:44,921 --> 00:47:49,750

1061
00:47:49,750 --> 00:47:50,560
>> SAWA.

1062
00:47:50,560 --> 00:47:55,840
Hivyo hii ni kitu mimi itabidi basi kufanya
mengi katika kipindi cha muhula.

1063
00:47:55,840 --> 00:47:57,500
Nahitaji kupumzika sauti yangu.

1064
00:47:57,500 --> 00:47:59,530
Nyie haja ya kuchochea wenyewe.

1065
00:47:59,530 --> 00:48:02,300
Mengi ya pengine
na kulala hivi sasa.

1066
00:48:02,300 --> 00:48:05,960
Mimi inputting matatizo random
ambapo sisi kama darasa au wewe

1067
00:48:05,960 --> 00:48:09,480
na mpenzi karibu na wewe ni kwenda
kutumia dakika kadhaa kujadili

1068
00:48:09,480 --> 00:48:14,980
jinsi tunataka kwenda kuhusu utatuzi
au kujenga mpango kama huu.

1069
00:48:14,980 --> 00:48:17,100
>> Hivyo sasa hivi, tunataka
kujenga program--

1070
00:48:17,100 --> 00:48:19,560
tunakwenda kuiita
upper.c-- kwamba waumini

1071
00:48:19,560 --> 00:48:24,787
neno lowercase kwa juu-darasa
kamba uppercase, pole.

1072
00:48:24,787 --> 00:48:26,370
Neno katika masharti, pole, ni sawa.

1073
00:48:26,370 --> 00:48:28,370
Mimi nina kwenda kuwabadilisha
kwa maana moja.

1074
00:48:28,370 --> 00:48:32,270

1075
00:48:32,270 --> 00:48:33,499
>> Naam.

1076
00:48:33,499 --> 00:48:34,540
Kuchukua dakika kadhaa.

1077
00:48:34,540 --> 00:48:37,130
Haina kuwa
zilizoandikwa kwa lugha yoyote.

1078
00:48:37,130 --> 00:48:39,890
Tu katika pseudocode kanuni au
kifikra jinsi sisi ingekuwa hata

1079
00:48:39,890 --> 00:48:42,083
kwenda juu ya kufanya tatizo hilo.

1080
00:48:42,083 --> 00:48:42,583
Naam.

1081
00:48:42,583 --> 00:48:49,881

1082
00:48:49,881 --> 00:48:52,780
>> [SIDE MAZUNGUMZO]

1083
00:48:52,780 --> 00:49:18,680

1084
00:49:18,680 --> 00:49:22,130
>> Mimi pia niliona kuwa nyie can--
Mimi aina ya kuona tayari mpango.

1085
00:49:22,130 --> 00:49:24,600
Nadhani ukosefu wangu wa
mtangazaji hali ni tatizo.

1086
00:49:24,600 --> 00:49:27,410
Lakini ni sawa.

1087
00:49:27,410 --> 00:49:30,410
>> [SIDE MAZUNGUMZO]

1088
00:49:30,410 --> 00:50:03,589

1089
00:50:03,589 --> 00:50:04,380
Naam, tafadhali, nyie.

1090
00:50:04,380 --> 00:50:05,400
Kuja kupata pipi.

1091
00:50:05,400 --> 00:50:06,372
Kuja kupata pipi.

1092
00:50:06,372 --> 00:50:07,698
>> Watazamaji: Ndiyo!

1093
00:50:07,698 --> 00:50:09,958
>> [SIDE MAZUNGUMZO]

1094
00:50:09,958 --> 00:50:16,101

1095
00:50:16,101 --> 00:50:18,100
ANDI PENG: Pia, yeah,
Mimi itabidi kuanza kutupa pipi

1096
00:50:18,100 --> 00:50:20,280
katika watu ambao hawana kujibu maswali.

1097
00:50:20,280 --> 00:50:22,260
Hivyo unapaswa maswali yote jibu.

1098
00:50:22,260 --> 00:50:24,895
Au nadhani watu ambao
Je, kujibu maswali.

1099
00:50:24,895 --> 00:50:26,070
Naam, njia nyingine kote.

1100
00:50:26,070 --> 00:50:28,570
>> [SIDE MAZUNGUMZO]

1101
00:50:28,570 --> 00:51:13,399

1102
00:51:13,399 --> 00:51:14,274
Watazamaji: [inaudible]

1103
00:51:14,274 --> 00:51:17,300

1104
00:51:17,300 --> 00:51:18,340
>> ANDI PENG: Naam.

1105
00:51:18,340 --> 00:51:19,340
Naam.

1106
00:51:19,340 --> 00:51:22,840
>> [SIDE MAZUNGUMZO]

1107
00:51:22,840 --> 00:51:40,700

1108
00:51:40,700 --> 00:51:41,590
>> Haki wote, nyie.

1109
00:51:41,590 --> 00:51:44,731
Kuchukua, kama, sekunde 10 zaidi.

1110
00:51:44,731 --> 00:51:48,210
>> [SIDE MAZUNGUMZO]

1111
00:51:48,210 --> 00:52:10,600

1112
00:52:10,600 --> 00:52:11,750
>> OK, nyie.

1113
00:52:11,750 --> 00:52:14,920
Hivyo kabla ya sisi kuanza kujaribu
kweli kimwili kuandika kanuni,

1114
00:52:14,920 --> 00:52:20,650
tabia nzuri ya kuendeleza ni kwamba
tunataka aina ya kwanza ya sababu

1115
00:52:20,650 --> 00:52:22,737
nje kifikra jinsi tunataka kufanya hivyo.

1116
00:52:22,737 --> 00:52:24,570
Wewe unataka kuhakikisha,
kabla kimwili

1117
00:52:24,570 --> 00:52:27,210
kuanza kujaribu kanuni
katika Mario, kwamba kufanya

1118
00:52:27,210 --> 00:52:28,870
kuhakikisha kwamba una pseudocode yako.

1119
00:52:28,870 --> 00:52:31,235
Hiyo ni kuchukua wewe kupitia
nini unahitaji kujenga hivyo

1120
00:52:31,235 --> 00:52:33,360
kwamba, wakati wewe kimwili
kuandika mpango wako baadaye,

1121
00:52:33,360 --> 00:52:36,640
wewe ni bora na uwezo wa kupata makosa
katika kanuni yako na mambo kama hayo.

1122
00:52:36,640 --> 00:52:40,460
>> Hivyo sisi ni kwenda kuanza tu
by-- kwa Kiingereza, katika pseudocode,

1123
00:52:40,460 --> 00:52:43,320
haina mtu yeyote nataka kutoa
mimi maelezo ya kurefusha maisha

1124
00:52:43,320 --> 00:52:46,250
jinsi tunataka kwenda juu ya kufanya hii?

1125
00:52:46,250 --> 00:52:48,102
Naam.

1126
00:52:48,102 --> 00:52:49,664
>> Watazamaji: [inaudible].

1127
00:52:49,664 --> 00:52:50,830
ANDI PENG: Hakika, hakuna wasiwasi.

1128
00:52:50,830 --> 00:52:57,233
Watazamaji: Je, unaweza kuuliza kwa au kuuliza
mtu kupata kamba 1-- yeah, kamba,

1129
00:52:57,233 --> 00:52:58,160
na then--

1130
00:52:58,160 --> 00:52:59,826
>> ANDI PENG: Ndiyo, hivyo hii ni mwanzo mzuri.

1131
00:52:59,826 --> 00:53:01,972
Mimi itabidi kuanza kuandika, sorry, kama wewe kusema.

1132
00:53:01,972 --> 00:53:02,471
So--

1133
00:53:02,471 --> 00:53:05,698
>> Watazamaji: --the ndogo
idadi ni ya juu, sawa?

1134
00:53:05,698 --> 00:53:08,519
Au herufi ndogo
kuwa na idadi kubwa?

1135
00:53:08,519 --> 00:53:09,310
ANDI PENG: Hasa.

1136
00:53:09,310 --> 00:53:16,156
Watazamaji: Hivyo basi sisi Ondoa
32 kutoka chochote [inaudible].

1137
00:53:16,156 --> 00:53:28,600

1138
00:53:28,600 --> 00:53:29,870
>> ANDI PENG: Mkuu.

1139
00:53:29,870 --> 00:53:35,020
Hivyo sisi aina ya kuwa na hisia kwa ujumla
ya jinsi ya kufanya kazi juu ya tatizo hili.

1140
00:53:35,020 --> 00:53:40,060
Akijua kwamba tumekuwa aina ya kujifunza
njia ya kimwili ambayo masharti

1141
00:53:40,060 --> 00:53:43,320
kuhifadhiwa katika kumbukumbu,
je, wewe tayari

1142
00:53:43,320 --> 00:53:45,920
tunajua kwamba wewe ni kwenda pengine
kuandika katika kanuni yako

1143
00:53:45,920 --> 00:53:48,288
ili kusonga kupitia kamba?

1144
00:53:48,288 --> 00:53:49,259
>> Watazamaji: Kwa kitanzi.

1145
00:53:49,259 --> 00:53:50,550
ANDI PENG: A kwa kitanzi, hasa.

1146
00:53:50,550 --> 00:53:56,540

1147
00:53:56,540 --> 00:53:57,220
Kubwa.

1148
00:53:57,220 --> 00:54:00,539
Hivyo sisi aina ya kuwa kurefusha maisha
pseudocode kuandikwa

1149
00:54:00,539 --> 00:54:02,330
aina hiyo ya anawapa
wewe inabainisha juu ya jinsi gani

1150
00:54:02,330 --> 00:54:03,900
ingekuwa hoja kuhusu utatuzi wa matatizo.

1151
00:54:03,900 --> 00:54:06,150
Sasa kwa kuwa una hii,
unaweza rejea ni kwa ajili ya baadaye

1152
00:54:06,150 --> 00:54:08,233
juu ya wakati wewe ni kujaribu
kweli kuandika kanuni yako.

1153
00:54:08,233 --> 00:54:10,240
Hivyo tunaweza kweli kwenda hapa.

1154
00:54:10,240 --> 00:54:25,130
Na mimi nimepata kazi kuitwa upper.c--
huko ni is-- ya tu template tupu

1155
00:54:25,130 --> 00:54:28,510
sasa hivi kwamba nyie ni kwenda
nisaidie kufikiri juu ya jinsi ya kuandika

1156
00:54:28,510 --> 00:54:30,430
mstari huu wa code-- si mstari wa kanuni.

1157
00:54:30,430 --> 00:54:32,890
Ni utakuwa mistari mingi ya kificho.

1158
00:54:32,890 --> 00:54:35,710
>> Wakati wa kuanza aina yoyote
ya tupu pset, nini

1159
00:54:35,710 --> 00:54:37,418
Jambo la kwanza mimi haja
kukumbuka kufanya nini?

1160
00:54:37,418 --> 00:54:39,290
>> Watazamaji: [inaudible].

1161
00:54:39,290 --> 00:54:41,000
>> ANDI PENG: Mkuu Yep.

1162
00:54:41,000 --> 00:54:41,500
Pamoja.

1163
00:54:41,500 --> 00:54:44,850

1164
00:54:44,850 --> 00:54:47,130
stdio.h.

1165
00:54:47,130 --> 00:54:49,640
Mara nyingi hii ni moja ya
rahisi zaidi makosa watu

1166
00:54:49,640 --> 00:54:51,598
itafanya wakati wao uko
kuandika, ni kwamba wao itabidi

1167
00:54:51,598 --> 00:54:54,180
kusahau ni pamoja na
muhimu maktaba wanahitaji.

1168
00:54:54,180 --> 00:54:57,689
Hivyo kama ni masaa ya ofisi na wewe ni kama,
Mimi sijui ni kwa nini kanuni yangu haifanyi kazi.

1169
00:54:57,689 --> 00:54:59,230
Je, unaweza kuniambia kwa nini ni si kazi?

1170
00:54:59,230 --> 00:55:00,730
Tunakwenda kusema je # ni pamoja na?

1171
00:55:00,730 --> 00:55:02,520
Unapaswa # ni pamoja na hiyo.

1172
00:55:02,520 --> 00:55:03,270
SAWA.

1173
00:55:03,270 --> 00:55:07,230
>> Hivyo sisi tumepewa kiwango I / O hapa.

1174
00:55:07,230 --> 00:55:10,740
Ni kwamba maktaba tu
sisi ni kwenda haja hapa?

1175
00:55:10,740 --> 00:55:12,681
Nini kingine ni sisi kwenda kufanya?

1176
00:55:12,681 --> 00:55:13,180
Pole.

1177
00:55:13,180 --> 00:55:14,562
Mtu tu kupiga kelele nje?

1178
00:55:14,562 --> 00:55:15,666
>> Watazamaji: [inaudible].

1179
00:55:15,666 --> 00:55:16,666
ANDI PENG: Kuna kwenda.

1180
00:55:16,666 --> 00:55:20,320

1181
00:55:20,320 --> 00:55:21,440
SAWA.

1182
00:55:21,440 --> 00:55:26,070
Na jinsi gani mimi kwenda kuhusu kuanzia aina yoyote
ya kazi, aina yoyote ya kazi kuu

1183
00:55:26,070 --> 00:55:28,760
ndani ya mpango wetu?

1184
00:55:28,760 --> 00:55:30,020
Int kuu.

1185
00:55:30,020 --> 00:55:34,531

1186
00:55:34,531 --> 00:55:35,030
SAWA.

1187
00:55:35,030 --> 00:55:35,970
Je, mimi kuweka ndani ya hapa?

1188
00:55:35,970 --> 00:55:37,640
Nini jambo la kwanza unataka kufanya?

1189
00:55:37,640 --> 00:55:39,910
Kama tunataka kupata
kamba kutoka kwa mtumiaji,

1190
00:55:39,910 --> 00:55:43,870
kile ni sisi kwenda na
kufanya juu ya mstari huu wa kwanza?

1191
00:55:43,870 --> 00:55:46,120
Samahani, nyie kuhisi tu
bure kuongea na sauti kubwa.

1192
00:55:46,120 --> 00:55:47,123
Tu kuita chochote.

1193
00:55:47,123 --> 00:55:48,772
>> Watazamaji: Uliza mtumiaji?

1194
00:55:48,772 --> 00:55:49,980
ANDI PENG: Je, sisi kufanya hivyo?

1195
00:55:49,980 --> 00:55:51,873
Ask-- Mimi ni kwenda aina "kuuliza user"?

1196
00:55:51,873 --> 00:55:52,600
>> Watazamaji: Printf.

1197
00:55:52,600 --> 00:55:54,341
>> ANDI PENG: Sawa.

1198
00:55:54,341 --> 00:55:54,840
Printf.

1199
00:55:54,840 --> 00:55:57,372
Je, nataka printf?

1200
00:55:57,372 --> 00:55:58,776
>> Watazamaji: Aina katika kitu fulani.

1201
00:55:58,776 --> 00:56:02,760

1202
00:56:02,760 --> 00:56:03,840
>> ANDI PENG: Kama kwamba?

1203
00:56:03,840 --> 00:56:05,430
Guys, kujifanya kama mimi nina kompyuta.

1204
00:56:05,430 --> 00:56:08,475
Kimwili kuniambia kila hatua
kwamba mimi haja ya aina katika hapa?

1205
00:56:08,475 --> 00:56:09,600
Mimi ni kufanya kitu kibaya?

1206
00:56:09,600 --> 00:56:10,743
Je, mimi kuwa typed kitu?

1207
00:56:10,743 --> 00:56:11,690
>> Watazamaji: Unahitaji quotes.

1208
00:56:11,690 --> 00:56:12,380
>> ANDI PENG: nahitaji quotes?

1209
00:56:12,380 --> 00:56:12,880
SAWA.

1210
00:56:12,880 --> 00:56:15,520

1211
00:56:15,520 --> 00:56:16,297
SAWA.

1212
00:56:16,297 --> 00:56:17,698
>> Watazamaji: Na mstari kisha mpya.

1213
00:56:17,698 --> 00:56:21,434

1214
00:56:21,434 --> 00:56:22,465
Semicolon.

1215
00:56:22,465 --> 00:56:23,340
ANDI PENG: semicolon?

1216
00:56:23,340 --> 00:56:24,060
SAWA.

1217
00:56:24,060 --> 00:56:24,560
Nzuri.

1218
00:56:24,560 --> 00:56:27,060
>> Watazamaji: Na labda kutaja
kwamba unataka katika lowercase?

1219
00:56:27,060 --> 00:56:30,120

1220
00:56:30,120 --> 00:56:31,415
>> ANDI PENG: Mkuu.

1221
00:56:31,415 --> 00:56:33,540
Nyie laugh at me
kusahau kuweka semicolon.

1222
00:56:33,540 --> 00:56:36,350
Mimi kuhakikisha wewe mahali fulani
katika mwendo wa darasa hili,

1223
00:56:36,350 --> 00:56:38,260
utakuwa kusahau kuweka
semicolon, na

1224
00:56:38,260 --> 00:56:41,116
itachukua wewe masaa matatu kufikiri
kwa nini kanuni yako hakifanyi kazi.

1225
00:56:41,116 --> 00:56:42,240
Ni kilichotokea kwa sisi sote.

1226
00:56:42,240 --> 00:56:43,950
Pengine kutokea kwa ninyi.

1227
00:56:43,950 --> 00:56:46,352
Kupata katika tabia nzuri ya kutumia semicolons.

1228
00:56:46,352 --> 00:56:46,852
SAWA.

1229
00:56:46,852 --> 00:56:49,010
>> Watazamaji: Je, unataka
kufanya backslash katika?

1230
00:56:49,010 --> 00:56:50,398
>> ANDI PENG: Ni kweli.

1231
00:56:50,398 --> 00:56:51,856
Je, unataka kufanya backslash katika?

1232
00:56:51,856 --> 00:56:53,020
>> Watazamaji: Ndiyo.

1233
00:56:53,020 --> 00:56:54,330
>> ANDI PENG: Mkuu.

1234
00:56:54,330 --> 00:56:54,830
SAWA.

1235
00:56:54,830 --> 00:56:57,872
Je, nini baada ya hapo?

1236
00:56:57,872 --> 00:56:58,964
>> Watazamaji: Kupata kamba.

1237
00:56:58,964 --> 00:56:59,880
ANDI PENG: Kupata kamba.

1238
00:56:59,880 --> 00:57:03,080

1239
00:57:03,080 --> 00:57:03,830
Basi je, mimi aina?

1240
00:57:03,830 --> 00:57:04,233
Kuna mtu?

1241
00:57:04,233 --> 00:57:05,040
>> Watazamaji: Kamba s.

1242
00:57:05,040 --> 00:57:05,873
>> ANDI PENG: Kamba s.

1243
00:57:05,873 --> 00:57:07,251
Watazamaji: GetString.

1244
00:57:07,251 --> 00:57:09,000
ANDI PENG: Kuna mtu,
unaweza kuniambia ambapo

1245
00:57:09,000 --> 00:57:12,000
huu GetString kazi anakuja kutoka?

1246
00:57:12,000 --> 00:57:13,660
>> Watazamaji: string.h.

1247
00:57:13,660 --> 00:57:15,256
>> ANDI PENG: string.h?

1248
00:57:15,256 --> 00:57:16,715
Unafikiri ni kutoka string.h?

1249
00:57:16,715 --> 00:57:17,830
>> Watazamaji: [inaudible].

1250
00:57:17,830 --> 00:57:18,830
>> ANDI PENG: Kuna kwenda.

1251
00:57:18,830 --> 00:57:21,280
Ni kutokana na CS50.h.

1252
00:57:21,280 --> 00:57:24,530
Kama wewe ni daima kuchanganyikiwa na pale
faili maktaba ni au kichwa faili ni,

1253
00:57:24,530 --> 00:57:28,450
google halisi string.h,
na mimi nitakuambia

1254
00:57:28,450 --> 00:57:30,450
nini ni kazi zote
walioko string.h.

1255
00:57:30,450 --> 00:57:31,340
SAWA.

1256
00:57:31,340 --> 00:57:35,210
>> Hivyo sasa kwamba mimi tumemuumba kamba
na nimekuwa kuchochea mtumiaji kwa ajili yake,

1257
00:57:35,210 --> 00:57:38,770
Nimekuwa kuhifadhiwa katika kutofautiana
jina lake s, je, mimi haja ya kufanya sasa?

1258
00:57:38,770 --> 00:57:40,652
>> Watazamaji: Angalia ikiwa ni katika lowercase.

1259
00:57:40,652 --> 00:57:41,360
ANDI PENG: Sorry?

1260
00:57:41,360 --> 00:57:42,545
Watazamaji: Angalia ikiwa ni katika lowercase.

1261
00:57:42,545 --> 00:57:44,045
ANDI PENG: zote haki, hebu kufanya hivyo.

1262
00:57:44,045 --> 00:57:45,857
Je, mimi kufanya hivyo?

1263
00:57:45,857 --> 00:57:47,940
Kwa kweli, kwa madhumuni
ya darasa sasa hivi,

1264
00:57:47,940 --> 00:57:50,330
tunakwenda tu kwa
kudhani kuwa kila kitu

1265
00:57:50,330 --> 00:57:52,620
kwamba sisi pembejeo tayari katika lowercase.

1266
00:57:52,620 --> 00:57:55,430
Kama alitaka kuangalia, wewe ungekuwa
tu kuongeza kauli masharti

1267
00:57:55,430 --> 00:57:59,640
kuwa kuchunguzwa, kwamba mbio kwa njia ya
kila moja safu kipengele

1268
00:57:59,640 --> 00:58:02,540
na kuangaliwa kama ni
kati ya maadili fulani.

1269
00:58:02,540 --> 00:58:05,627
Mimi kusahau nini idadi
maadili ya lowercase ni.

1270
00:58:05,627 --> 00:58:07,210
Unaweza kuangalia ni juu ya meza ASCII.

1271
00:58:07,210 --> 00:58:08,800
Lakini yeah, hiyo ni hatua nzuri kwa kweli.

1272
00:58:08,800 --> 00:58:11,758
Lakini sasa hivi, tunakwenda tu kwa
kudhani kuwa masharti yote sisi pembejeo

1273
00:58:11,758 --> 00:58:13,130
ni katika lowercase.

1274
00:58:13,130 --> 00:58:13,870
SAWA.

1275
00:58:13,870 --> 00:58:18,069
>> Hivyo ni jinsi gani mimi kwenda kuhusu
tatizo hili baada ya hapo?

1276
00:58:18,069 --> 00:58:18,860
Watazamaji: Kwa kitanzi.

1277
00:58:18,860 --> 00:58:19,340
ANDI PENG: Kwa kitanzi?

1278
00:58:19,340 --> 00:58:19,839
SAWA.

1279
00:58:19,839 --> 00:58:20,847
Kuniambia nini cha aina.

1280
00:58:20,847 --> 00:58:25,230
>> Watazamaji: Kwa int i sawa 0.

1281
00:58:25,230 --> 00:58:27,230
>> ANDI PENG: Sawa.

1282
00:58:27,230 --> 00:58:36,350
>> Watazamaji: Oh, kweli, basi
kufanya comma na kufanya n sawa na strlen.

1283
00:58:36,350 --> 00:58:38,940
>> ANDI PENG: Jambo Hivyo muhimu
nadhani yeye ni niliona hapa

1284
00:58:38,940 --> 00:58:42,936
ni kwamba hatukuwa na kusema int
n mara ya pili sisi alifanya hivyo.

1285
00:58:42,936 --> 00:58:45,060
Tu kujua kwamba katika kwa
kitanzi wakati wewe ni kutangaza,

1286
00:58:45,060 --> 00:58:47,934
wewe kweli hawana haja int wa
mara ya pili unaweza kufanya kutofautiana.

1287
00:58:47,934 --> 00:58:51,202
Unaweza kusema n strlen.

1288
00:58:51,202 --> 00:58:52,620
>> Watazamaji: Kwa s.

1289
00:58:52,620 --> 00:58:53,510
>> ANDI PENG: s.

1290
00:58:53,510 --> 00:58:54,706
SAWA.

1291
00:58:54,706 --> 00:58:58,370
>> Watazamaji: Basi semicolon.

1292
00:58:58,370 --> 00:59:00,130
>> ANDI PENG: Ni kweli.

1293
00:59:00,130 --> 00:59:04,050
>> Watazamaji: Na kisha [inaudible] n.

1294
00:59:04,050 --> 00:59:07,480

1295
00:59:07,480 --> 00:59:09,460
Kisha i ++.

1296
00:59:09,460 --> 00:59:11,780
>> ANDI PENG: Mkuu.

1297
00:59:11,780 --> 00:59:12,280
Sawa.

1298
00:59:12,280 --> 00:59:14,690
Je, tunataka ndani ya
ya hii kwa kitanzi sasa?

1299
00:59:14,690 --> 00:59:17,820
Kumbuka, kama tunakwenda kukimbia kwa njia ya
kamba na kukimbia kwa njia ya safu,

1300
00:59:17,820 --> 00:59:19,287
tunataka kuangalia mambo ndani yake.

1301
00:59:19,287 --> 00:59:20,370
Je, ni sisi kwenda haja?

1302
00:59:20,370 --> 00:59:23,070

1303
00:59:23,070 --> 00:59:26,900
Hii ni aina ya sehemu gumu sasa.

1304
00:59:26,900 --> 00:59:27,960
Mtu yeyote kuwa nadhani?

1305
00:59:27,960 --> 00:59:34,160

1306
00:59:34,160 --> 00:59:34,690
>> SAWA.

1307
00:59:34,690 --> 00:59:37,830
Hivyo kwanza, jinsi gani sisi hata kupata?

1308
00:59:37,830 --> 00:59:41,610
Je, sisi hata kuangalia kwanza au
kupata kipengele katika safu?

1309
00:59:41,610 --> 00:59:42,920
Je, sisi kufanya hivyo?

1310
00:59:42,920 --> 00:59:47,120
Nini nukuu tunatumia kufanya hivyo?

1311
00:59:47,120 --> 00:59:50,920
Nini jina la safu hii iitwayo?

1312
00:59:50,920 --> 00:59:52,400
Ni wito s, sawa?

1313
00:59:52,400 --> 00:59:54,850
>> Kumbuka, kamba yoyote ni daima safu.

1314
00:59:54,850 --> 00:59:58,210
Hivyo s mabano i, sawa?

1315
00:59:58,210 --> 01:00:01,360
Kwa sababu hiyo ni thamani ya sasa
au thamani index sisi ni kuangalia.

1316
01:00:01,360 --> 01:00:05,156
Na tunakwenda kuweka kwamba sawa
to-- tunataka thamani ndogo, sivyo?

1317
01:00:05,156 --> 01:00:07,530
Tunataka kugeuka kuwa lower--
pole, tunataka herufi kubwa.

1318
01:00:07,530 --> 01:00:10,014
Tunataka kugeuka ndogo
thamani katika uppercase.

1319
01:00:10,014 --> 01:00:11,805
Na hivyo like-- Samahani,
Jina lako nani?

1320
01:00:11,805 --> 01:00:12,580
>> Watazamaji: Heidi.

1321
01:00:12,580 --> 01:00:12,940
>> ANDI PENG: Sorry?

1322
01:00:12,940 --> 01:00:13,280
>> Watazamaji: Heidi.

1323
01:00:13,280 --> 01:00:13,988
>> ANDI PENG: Heidi.

1324
01:00:13,988 --> 01:00:15,850
Kama Heidi alisema
Awali, sisi ni pengine

1325
01:00:15,850 --> 01:00:20,330
kwenda haja the-- tuko
pengine kwenda na Ondoa

1326
01:00:20,330 --> 01:00:22,630
32 kutoka charc chochote kile, sawa?

1327
01:00:22,630 --> 01:00:24,680
Kwa sababu juu ya ASCII
meza, tofauti

1328
01:00:24,680 --> 01:00:27,790
kati ya barua lowercase
na barua uppercase ni 32.

1329
01:00:27,790 --> 01:00:31,290
Hivyo wakati sisi ni kufanya hivyo, tuko pengine
atataka Ondoa 32, sawa?

1330
01:00:31,290 --> 01:00:33,910
>> Hivyo sisi ni kwenda kufanya s i.

1331
01:00:33,910 --> 01:00:37,590

1332
01:00:37,590 --> 01:00:41,200
Je, kila mtu kuelewa kwa nini mimi alifanya hivyo?

1333
01:00:41,200 --> 01:00:45,760
Kwa sababu sasa hivi, katika safu yetu,
sisi ni kuangalia 0 ripoti, haki?

1334
01:00:45,760 --> 01:00:49,190
Na katika 0 ripoti ya
kamba, hiyo ni tabia ya kwanza.

1335
01:00:49,190 --> 01:00:51,820
Na kwamba tabia tunakwenda
kwa kudhani ni ndogo.

1336
01:00:51,820 --> 01:00:55,980
Kama tunataka kufanya hivyo uppercase, sisi
na Ondoa 32 kutoka thamani yake,

1337
01:00:55,980 --> 01:00:58,620
kwa sababu katika ASCII yetu
meza, hiyo ni jinsi sisi kupata

1338
01:00:58,620 --> 01:01:01,600
ijayo sambamba
thamani kwamba inafanya uppercase.

1339
01:01:01,600 --> 01:01:03,714
Je, kila mtu kuelewa kwamba?

1340
01:01:03,714 --> 01:01:04,213
Naam.

1341
01:01:04,213 --> 01:01:06,530
>> Watazamaji: Je wewe pia
Je, Herufi za chini minus--

1342
01:01:06,530 --> 01:01:08,080
>> ANDI PENG: Yeah, hivyo hiyo ni
kweli mzuri.

1343
01:01:08,080 --> 01:01:10,455
Mimi nina kwenda kuja nyuma na kwamba
swali baada ya sisi kufanya hivyo.

1344
01:01:10,455 --> 01:01:11,060
Naam.

1345
01:01:11,060 --> 01:01:13,940
Na kisha kama nataka
kuona nini kinaendelea,

1346
01:01:13,940 --> 01:01:16,180
Mimi pengine ni kwenda
unataka magazeti, sawa?

1347
01:01:16,180 --> 01:01:19,930
Kuna mtu kuniambia nini
Nataka magazeti hapa.

1348
01:01:19,930 --> 01:01:29,160
>> Watazamaji: printf asilimia
c backslash [inaudible].

1349
01:01:29,160 --> 01:01:33,570
Hiyo ni thamani ya [inaudible] s i.

1350
01:01:33,570 --> 01:01:34,614
>> ANDI PENG: s i, pole?

1351
01:01:34,614 --> 01:01:35,530
Watazamaji: [inaudible].

1352
01:01:35,530 --> 01:01:38,550

1353
01:01:38,550 --> 01:01:39,550
ANDI PENG: Sijui.

1354
01:01:39,550 --> 01:01:40,600
Je, unafikiri?

1355
01:01:40,600 --> 01:01:44,016
>> Watazamaji: Naam, mimi wouldn't--
Nadhani napenda bring--

1356
01:01:44,016 --> 01:01:46,944
Napenda kuchukua nje
ndani, kwa sababu [inaudible].

1357
01:01:46,944 --> 01:01:49,726

1358
01:01:49,726 --> 01:01:51,392
ANDI PENG: Oh, wewe ingekuwa amefanya hivyo?

1359
01:01:51,392 --> 01:01:53,867
Watazamaji: Naam.

1360
01:01:53,867 --> 01:01:56,700
ANDI PENG: Hebu kuondoka njia
ni, na mimi itabidi kueleza kwa nini baadaye.

1361
01:01:56,700 --> 01:01:58,533
Kumbuka, hata wakati
kuwa mmiliki mahali,

1362
01:01:58,533 --> 01:02:00,701
unataka kuweka mabano kuzunguka.

1363
01:02:00,701 --> 01:02:01,200
Sawa.

1364
01:02:01,200 --> 01:02:04,810
Hivyo hii lazima kazi ngumu hapa.

1365
01:02:04,810 --> 01:02:06,370
Hebu kuendesha na kuona kama ni inaandaa.

1366
01:02:06,370 --> 01:02:08,750
Kufanya juu.

1367
01:02:08,750 --> 01:02:09,250
Uh-oh.

1368
01:02:09,250 --> 01:02:12,030

1369
01:02:12,030 --> 01:02:13,340
Hiyo haina kuangalia vizuri pia.

1370
01:02:13,340 --> 01:02:14,507
Kwa nini hii inatokea?

1371
01:02:14,507 --> 01:02:17,340
Kama ilivyo kwa makosa yoyote, unataka kwenda
nyuma na kuanza na moja ya kwanza,

1372
01:02:17,340 --> 01:02:20,630
kwa sababu kwa kawaida makosa moja ya sababu
kura ya makosa mengine baada yake.

1373
01:02:20,630 --> 01:02:26,700
Hapa tunaona upper.c: 18: 25, ambayo anaelezea
mimi katika mpango huu aitwaye upper.c,

1374
01:02:26,700 --> 01:02:33,800
kwenye mstari 18, kosa implicitly kutangaza
maktaba ya kazi strlen na aina

1375
01:02:33,800 --> 01:02:36,330
unassigned-- blah, sijui
nini kinaendelea baada ya hapo.

1376
01:02:36,330 --> 01:02:39,990
>> Wote ni kuwaambia mimi hivi sasa ni
kitu ambacho kinaendelea strlen.

1377
01:02:39,990 --> 01:02:43,520
Na ni kompyuta kuchanganyikiwa, kwa sababu
ni kama, mimi sijui nini strlen ni?

1378
01:02:43,520 --> 01:02:45,520
Je, hiyo pengine
kukuambia wewe ni kukosa?

1379
01:02:45,520 --> 01:02:46,490
>> Watazamaji: Wewe ni kukosa [inaudible].

1380
01:02:46,490 --> 01:02:47,630
>> ANDI PENG: Wewe ni haki.

1381
01:02:47,630 --> 01:02:49,510
Hasa.

1382
01:02:49,510 --> 01:02:52,140
Hivyo hii ni mahali ambapo ni
muhimu kuhakikisha

1383
01:02:52,140 --> 01:02:56,970
kwamba kila kazi ya kutumia katika yako
kanuni ni kuwa na kichwa sahihi

1384
01:02:56,970 --> 01:02:59,660
faili kwa ajili ya maktaba, au mwingine
wewe ni kwenda kupata kura ya makosa

1385
01:02:59,660 --> 01:03:01,150
na kanuni yako si kwenda
kujua nini kinaendelea.

1386
01:03:01,150 --> 01:03:03,050
Hivyo sisi ni kwenda ni pamoja na string.h hapa.

1387
01:03:03,050 --> 01:03:06,270
>> Sasa wakati sisi kujaribu kukusanya juu.

1388
01:03:06,270 --> 01:03:08,410
Kukusanya usahihi.

1389
01:03:08,410 --> 01:03:09,960
Hebu kuendesha mpango huu.

1390
01:03:09,960 --> 01:03:12,000
Hivyo aina ya kitu katika lowercase.

1391
01:03:12,000 --> 01:03:14,920
Nini guys unataka aina?

1392
01:03:14,920 --> 01:03:16,546
Kuita kitu.

1393
01:03:16,546 --> 01:03:17,920
Haki wote, Charly tu kutembea katika.

1394
01:03:17,920 --> 01:03:18,990
Tutaweza kuandika jina Charly ya.

1395
01:03:18,990 --> 01:03:21,670

1396
01:03:21,670 --> 01:03:22,840
>> Charly katika lowercase.

1397
01:03:22,840 --> 01:03:27,742
Na hopefully, hopefully, hii ni
kwenda kuita na mate nje

1398
01:03:27,742 --> 01:03:28,575
Charly katika uppercase.

1399
01:03:28,575 --> 01:03:30,830
Yay!

1400
01:03:30,830 --> 01:03:33,430
haina kila mtu kuelewa jinsi
Nikaenda kuhusu utatuzi hiyo?

1401
01:03:33,430 --> 01:03:36,190
Njia ambayo naweza
kuendesha kwa kutumia integers

1402
01:03:36,190 --> 01:03:39,410
kutatua jambo ambalo
Nataka kufanya katika masharti,

1403
01:03:39,410 --> 01:03:44,390
kwa sababu wahusika na integers Unaweza
kuwa referenced katika njia ile ile kwa sababu

1404
01:03:44,390 --> 01:03:45,540
ya ramani ASCII.

1405
01:03:45,540 --> 01:03:52,890
>> Hivyo kurudi kwa uhakika yako, kama mimi
alitaka kuweka hapa badala ya 32

1406
01:03:52,890 --> 01:03:58,959
uppercase A bala Herufi za chini tu kama
kwamba, kwamba ingekuwa kazi sawa kama vizuri,

1407
01:03:58,959 --> 01:04:01,750
kwa sababu hiyo ni tu tu
Tofauti kati ya maadili hayo mawili.

1408
01:04:01,750 --> 01:04:09,570
Kama nataka kufanya charly hii again--.

1409
01:04:09,570 --> 01:04:10,320
Oh no.

1410
01:04:10,320 --> 01:04:11,820
Nadhani tulikwenda njia sahihi, ndiyo?

1411
01:04:11,820 --> 01:04:13,260
>> Watazamaji: [inaudible] Herufi za chini.

1412
01:04:13,260 --> 01:04:14,260
>> ANDI PENG: Kuna kwenda.

1413
01:04:14,260 --> 01:04:22,380

1414
01:04:22,380 --> 01:04:22,880
Yep.

1415
01:04:22,880 --> 01:04:24,920
Na nje mtemi charly.

1416
01:04:24,920 --> 01:04:28,020
Hivyo kuwa makini wakati
wewe ni subtracting maadili

1417
01:04:28,020 --> 01:04:30,400
kukumbuka ambayo moja ni
mkubwa kuliko wengine.

1418
01:04:30,400 --> 01:04:35,220
Kwa mfano, hapa mimi alisahau
kuwa lowercase a ni kweli

1419
01:04:35,220 --> 01:04:38,540
kubwa kuliko herufi kubwa A. Hivyo wakati mimi
alijaribu Ondoa yao kwa njia nyingine

1420
01:04:38,540 --> 01:04:40,600
karibu, I got hasi 32.

1421
01:04:40,600 --> 01:04:42,800
Na kompyuta yangu ilikuwa kama,
Sijui nini kwamba ni.

1422
01:04:42,800 --> 01:04:45,810
Ni uwezekano baadhi tu bila mpangilio
thamani ambayo si nzuri sana.

1423
01:04:45,810 --> 01:04:48,760
Na ili kuhakikisha kuwa wewe ni
subtracting katika urefu sahihi

1424
01:04:48,760 --> 01:04:52,831
kupata tabia unataka.

1425
01:04:52,831 --> 01:04:53,330
SAWA.

1426
01:04:53,330 --> 01:04:58,550
Kuna mtu yeyote kuchanganyikiwa juu ya jinsi sisi
akizunguka kuandika kazi hii?

1427
01:04:58,550 --> 01:04:59,180
SAWA.

1428
01:04:59,180 --> 01:05:04,830
Hivyo kweli, kazi tayari
lipo katika maktaba inayoitwa ctype.h.

1429
01:05:04,830 --> 01:05:06,417
Maktaba kuitwa ctype.h.

1430
01:05:06,417 --> 01:05:08,500
Kazi hii kwa kweli ni
tayari imeandikwa kwa ajili yenu.

1431
01:05:08,500 --> 01:05:10,820
Ni wito kwa juu.

1432
01:05:10,820 --> 01:05:13,027
>> Na hivyo kwa madhumuni ya
pset hii, wewe ni kwenda

1433
01:05:13,027 --> 01:05:15,860
kupata kwamba kwa kweli wanataka kutumia
mengi ya kazi zilizomo

1434
01:05:15,860 --> 01:05:17,390
ndani ya maktaba ctype.

1435
01:05:17,390 --> 01:05:21,040
Kwa juu, kupunguza, ni juu, ni
lower-- wale ni kazi zote

1436
01:05:21,040 --> 01:05:24,914
kwamba utakuwa na uwezo wa kutumia sana,
haraka sana katika kanuni yako mwenyewe kwamba

1437
01:05:24,914 --> 01:05:26,080
gani hasa nini anafanya hivyo.

1438
01:05:26,080 --> 01:05:28,941
Tuliandika nje ya jinsi ya kubadilisha
kamba kwa uppercase.

1439
01:05:28,941 --> 01:05:31,440
Lakini hii ni kweli kificho
kwamba mtu mwingine ameandika

1440
01:05:31,440 --> 01:05:33,800
na kwamba unaweza kupata
kupitia kazi mbalimbali.

1441
01:05:33,800 --> 01:05:34,300
Yeah?

1442
01:05:34,300 --> 01:05:39,570
>> Watazamaji: Hivyo wewe tu nakala ya huko
na kufanya hivyo kwa kila barua moja?

1443
01:05:39,570 --> 01:05:42,070
>> ANDI PENG: Ndiyo, kwa sababu mimi si
huduma kuhusu maadili ya.

1444
01:05:42,070 --> 01:05:44,540
I just huduma ya kwamba tofauti
kati yao ni 32, sawa?

1445
01:05:44,540 --> 01:05:48,210
Tofauti kati ya ndogo
b na uppercase B pia ni 32.

1446
01:05:48,210 --> 01:05:50,860
Na tofauti kati ya c
na uppercase C ni daima 32.

1447
01:05:50,860 --> 01:05:53,235
>> Mimi tu huduma ya juu
tofauti kati ya mbili,

1448
01:05:53,235 --> 01:05:56,666
kwa sababu wote wa barua
kufuata mfano huo, sawa?

1449
01:05:56,666 --> 01:05:58,540
Kama mimi na tofauti
kati ya mmoja wao,

1450
01:05:58,540 --> 01:06:01,050
Mimi najua kile tofauti
kati ya wote ni.

1451
01:06:01,050 --> 01:06:01,740
Nzuri swali.

1452
01:06:01,740 --> 01:06:04,090
Naam.

1453
01:06:04,090 --> 01:06:06,660
Kila mtu mwema?

1454
01:06:06,660 --> 01:06:09,080
SAWA.

1455
01:06:09,080 --> 01:06:09,580
OOP.

1456
01:06:09,580 --> 01:06:14,380

1457
01:06:14,380 --> 01:06:15,270
>> SAWA.

1458
01:06:15,270 --> 01:06:20,310
Hivyo dhana mwingine ambaye yuko
kwenda kuwa muhimu sana kama wewe

1459
01:06:20,310 --> 01:06:22,570
kuendeleza
kanuni yako ni wazo hili

1460
01:06:22,570 --> 01:06:25,430
ya kujenga kazi au uchukuaji.

1461
01:06:25,430 --> 01:06:28,479
Hivyo sasa hivi, tumekuwa wote kuchukuliwa algebra.

1462
01:06:28,479 --> 01:06:31,770
Katika algebra, wewe ni kufundisha kuwa kuna
jambo hili ajabu aitwaye kazi

1463
01:06:31,770 --> 01:06:35,300
mashine, ambapo kama wewe
pembejeo moja aina ya idadi,

1464
01:06:35,300 --> 01:06:38,720
ni anaendesha kwa njia ya kazi hii ya ajabu
na nje pops pato mbalimbali, sawa?

1465
01:06:38,720 --> 01:06:42,220
Katika kanuni, kitu kimoja kinachotokea
katika aina yoyote ya kazi.

1466
01:06:42,220 --> 01:06:48,230
>> Hivyo mimi naweza kimwili
kuandika katika mwili wangu wa kanuni yangu

1467
01:06:48,230 --> 01:06:52,357
Kauli kuu kwamba kweli haina
chochote mwili wa kanuni ni kufanya.

1468
01:06:52,357 --> 01:06:54,940
Lakini nje ya kwamba, siwezi pia
kuandika kazi nyingi tofauti

1469
01:06:54,940 --> 01:06:56,320
kwamba kufanya mambo mengi tofauti.

1470
01:06:56,320 --> 01:06:58,570
Kwa mfano, tumekuwa tayari
kuanza kutumia baadhi yao.

1471
01:06:58,570 --> 01:07:00,610
Printf-- kwamba ni
kazi ambayo mtu mwingine

1472
01:07:00,610 --> 01:07:02,870
tayari imeandikwa kwamba
tunaweza kuwaita katika kanuni zetu.

1473
01:07:02,870 --> 01:07:05,410
Kwa upper-- katika kesi hiyo,
upper-- ni kazi nyingine

1474
01:07:05,410 --> 01:07:07,330
tumekuwa imeandikwa kwamba sisi
Unaweza kupiga simu katika kanuni zetu.

1475
01:07:07,330 --> 01:07:09,520
Na hivyo mimi nadhani nini
sisi hata kuwa na kazi?

1476
01:07:09,520 --> 01:07:12,100
Mbona sisi tu plop ni
wote katika mstari huo wa kanuni?

1477
01:07:12,100 --> 01:07:13,730
Ni kuwa rahisi kwa kila mtu.

1478
01:07:13,730 --> 01:07:19,200
>> Naam, hoja nyuma kwamba
ni, kwanza ya yote, shirika hilo.

1479
01:07:19,200 --> 01:07:21,880
Ni kweli annoying kwenda
kupitia mtu wa kanuni

1480
01:07:21,880 --> 01:07:25,110
na kazi moja kama printf.

1481
01:07:25,110 --> 01:07:28,570
Kama nyie kweli alijua nini
kazi printf kilichomo kuandika,

1482
01:07:28,570 --> 01:07:30,530
ni, kama, mistari 1,000 wa kanuni.

1483
01:07:30,530 --> 01:07:32,357
>> Kama kila wakati nilitaka
printf kitu,

1484
01:07:32,357 --> 01:07:35,440
Mimi nilikuwa na kuandika mistari 1,000 wa kanuni,
hiyo inaweza kuwa kweli annoying kusoma,

1485
01:07:35,440 --> 01:07:36,290
sawa?

1486
01:07:36,290 --> 01:07:38,860
Hiyo ni kwa nini tumekuwa tu
umba kazi hii abstract

1487
01:07:38,860 --> 01:07:41,670
kwamba tuna tayari mtu
mwingine ameandika mahali pengine.

1488
01:07:41,670 --> 01:07:44,920
Na kila wakati tunahitaji kuitumia katika
kanuni zetu, sisi tu kusema printf.

1489
01:07:44,920 --> 01:07:48,070
Na kwamba anao uwezo wa kutumia kazi
mtu mwingine ameandika katika kanuni zetu.

1490
01:07:48,070 --> 01:07:51,020
Inafanya kuwa rahisi
organizationally kusoma kanuni.

1491
01:07:51,020 --> 01:07:53,460
>> Pili, ni kurahisisha.

1492
01:07:53,460 --> 01:07:56,750
Ni simplifies hatua tuna
kuchukua ili kutatua tatizo letu.

1493
01:07:56,750 --> 01:07:59,300
Printf, kazi kama printf,
kazi kama kwa juu

1494
01:07:59,300 --> 01:08:03,560
yote ni mambo ambayo kuruhusu sisi
kurahisisha kificho yetu chini hivyo ni rahisi.

1495
01:08:03,560 --> 01:08:05,830
Na jambo la mwisho ni reusability.

1496
01:08:05,830 --> 01:08:08,710
>> Hivyo ukweli kwamba tuna
kazi kuitwa printf

1497
01:08:08,710 --> 01:08:11,990
kwamba tunaweza kuwaita mbalimbali
nyakati na inaruhusu kuwa ni reusable.

1498
01:08:11,990 --> 01:08:14,980
Kama ningekuwa kuandika printf,
Mimi tu kuandika ni mara moja.

1499
01:08:14,980 --> 01:08:16,439
Ipo tu kwa kuwa sehemu moja.

1500
01:08:16,439 --> 01:08:19,890
Kama nilitaka kufanya hivyo tena, napenda
na nakala na kuweka yote ya kwamba

1501
01:08:19,890 --> 01:08:21,760
katika upinzani wangu wa pili wa kanuni.

1502
01:08:21,760 --> 01:08:24,880
Hiyo ni kwa nini kama sisi kujenga kazi
ambayo ipo nje ya kuu yetu,

1503
01:08:24,880 --> 01:08:26,880
tunaweza tu waomba
hiyo na kutumia tena wakati wowote

1504
01:08:26,880 --> 01:08:29,604
tunahitaji ili ni rahisi sana
kwa ajili yetu kama mipango ya kuandika.

1505
01:08:29,604 --> 01:08:32,220

1506
01:08:32,220 --> 01:08:35,549
>> Hivyo njia kwamba tunataka kweli kuandika
kazi ni sawa, sawa?

1507
01:08:35,549 --> 01:08:37,590
Hii ni aina ya kwanza
mfano ambao tutaweza

1508
01:08:37,590 --> 01:08:42,830
ona kazi kuchukua juu ya mtindo
tofauti kuliko int kuu utupu wetu.

1509
01:08:42,830 --> 01:08:46,779
Katika kesi hiyo, kama nilitaka
kuandika kazi kuitwa q, sawa?

1510
01:08:46,779 --> 01:08:49,370
>> Na int thamani hapa
ni wote kuniambia,

1511
01:08:49,370 --> 01:08:51,649
je, nataka hii
kazi kurudi kwangu?

1512
01:08:51,649 --> 01:08:54,484
Kama mimi nataka mchemraba integer,
Mimi nina kwenda wanataka pembejeo.

1513
01:08:54,484 --> 01:08:55,525
Hizi ni vigezo.

1514
01:08:55,525 --> 01:08:58,490
Mimi nina kwenda pembejeo thamani ya aina int.

1515
01:08:58,490 --> 01:09:01,300
Na mimi nina kwenda na kurudi
aina nyingine ya thamani ya int.

1516
01:09:01,300 --> 01:09:03,050
Na katika hapa, kama wewe
Unaweza kuona, kila mimi nina kufanya

1517
01:09:03,050 --> 01:09:07,300
ni cubing chochote pembejeo yangu ni
kama pato langu na kurudi yake.

1518
01:09:07,300 --> 01:09:10,790
>> Hivyo kazi hii yote ni gani
inachukua aina fulani ya integer.

1519
01:09:10,790 --> 01:09:14,979
Ni hulizidisha na yenyewe mara mbili
hivyo kwamba cubes katika athari.

1520
01:09:14,979 --> 01:09:17,729
Na kisha kuirudisha
chochote pato kwamba ni.

1521
01:09:17,729 --> 01:09:20,540
Hivyo katika kesi hii, ni mistari miwili ya
kificho kwamba tulikuwa na kuandika ziada.

1522
01:09:20,540 --> 01:09:22,880
Lakini kama sisi alitaka kuwaita
juu ya hili mara kwa mara nyingi,

1523
01:09:22,880 --> 01:09:26,210
ni rahisi sana na aina hiyo moja
mstari wa kulia hapa hiyo ni katika mchemraba kuliko

1524
01:09:26,210 --> 01:09:28,830
una kwenda kupitia mara nyingi.

1525
01:09:28,830 --> 01:09:34,180
>> Hivyo njia kwamba kimsingi yoyote
formatting kwa aina yoyote ya kazi

1526
01:09:34,180 --> 01:09:36,420
kinaenda zipo ni kama hapa.

1527
01:09:36,420 --> 01:09:38,659
Hivyo tuna jina kazi.

1528
01:09:38,659 --> 01:09:39,950
Katika kesi hiyo, ni kuitwa mchemraba.

1529
01:09:39,950 --> 01:09:42,033
Na sisi jina hilo kwa sababu mchemraba
ni rahisi kukumbuka.

1530
01:09:42,033 --> 01:09:44,220
Unaweza jina hilo mraba na
ni kweli anaweza cubed.

1531
01:09:44,220 --> 01:09:45,500
Haijalishi.

1532
01:09:45,500 --> 01:09:48,020
Tu jina kuwa uko
kumshirikisha kazi yako.

1533
01:09:48,020 --> 01:09:51,660
>> Haki hii hapa, int, ni
aina ya parameter unahitaji.

1534
01:09:51,660 --> 01:09:54,149
Kwa hiyo kile anafanya kazi hii
unahitaji ili kufanya kazi?

1535
01:09:54,149 --> 01:09:55,990
Naam, inahitaji pembejeo.

1536
01:09:55,990 --> 01:09:56,704
Mimi jina lake ni pembejeo.

1537
01:09:56,704 --> 01:09:58,120
Unaweza jina hilo chochote unataka.

1538
01:09:58,120 --> 01:10:00,500
Lakini nahitaji kitu cha aina int.

1539
01:10:00,500 --> 01:10:03,730
Ni kwenda kweli nitafanya
chochote ni ndani ya hapa,

1540
01:10:03,730 --> 01:10:04,990
mwili wa kazi.

1541
01:10:04,990 --> 01:10:07,847
Na kisha aina ya kurudi
haki hapa, hii int

1542
01:10:07,847 --> 01:10:09,680
zote ni kuwaambia mimi ni
kuwa kazi hii ni

1543
01:10:09,680 --> 01:10:11,250
kwenda na kurudi kwangu katika int.

1544
01:10:11,250 --> 01:10:14,460
Hivyo ni kwenda kuchukua katika int, na
itakuja kukupa nyuma int.

1545
01:10:14,460 --> 01:10:17,750
Je, kila mtu kuelewa jinsi
formatting ya aina hii kazi?

1546
01:10:17,750 --> 01:10:18,250
Baridi.

1547
01:10:18,250 --> 01:10:24,690

1548
01:10:24,690 --> 01:10:25,740
>> SAWA.

1549
01:10:25,740 --> 01:10:31,770
Kwa hiyo msiwe na wasiwasi kama hii inaonekana
kidogo abstract hivi sasa.

1550
01:10:31,770 --> 01:10:33,450
Hili ni jambo ambalo tutaweza majadiliano juu.

1551
01:10:33,450 --> 01:10:36,310
Tutaweza kupiga mbizi katika undani
baadaye katika shaka.

1552
01:10:36,310 --> 01:10:41,170
Njia hiyo aina yoyote ya kiwango cha juu
uchukuaji wa mambo haya kazi

1553
01:10:41,170 --> 01:10:43,530
ni kwamba, katika kumbukumbu, katika
kompyuta yako, kila kitu

1554
01:10:43,530 --> 01:10:47,660
ni kuhifadhiwa katika aina hii
ya stack, niseme.

1555
01:10:47,660 --> 01:10:49,070
>> Hivyo hadi pale juu.

1556
01:10:49,070 --> 01:10:50,861
Sijui kama wewe
guys unaweza kuona kwamba pia.

1557
01:10:50,861 --> 01:10:52,590
Nitajaribu kuvuta.

1558
01:10:52,590 --> 01:10:55,111
Hapa juu, sisi
na asilia kimwili

1559
01:10:55,111 --> 01:10:57,860
nini kompyuta ni interpreting--
zote zeros na ndio kwamba

1560
01:10:57,860 --> 01:10:59,540
zipo ndani ya kompyuta yetu.

1561
01:10:59,540 --> 01:11:03,390
Na kisha sisi initialized
data na uninitialized data,

1562
01:11:03,390 --> 01:11:05,340
kile tunachokiita vigezo kimataifa.

1563
01:11:05,340 --> 01:11:08,200
Hivyo vigezo ambazo zipo
katika mipango yote

1564
01:11:08,200 --> 01:11:11,815
na hela nzima wako,
kimsingi, kanuni.

1565
01:11:11,815 --> 01:11:13,940
Hakuna wasiwasi kama wewe guys ni
aina ya wazi juu ya hili.

1566
01:11:13,940 --> 01:11:16,060
Ni kweli haina jambo hivi sasa.

1567
01:11:16,060 --> 01:11:18,680
>> Na kisha tuna nini
aitwaye chungu katika stack.

1568
01:11:18,680 --> 01:11:21,140
Fikiria mkusanyiko halisi kama
kama mkusanyiko wa mambo,

1569
01:11:21,140 --> 01:11:23,098
mkusanyiko wa tofauti
mambo kuwa kusukuma juu

1570
01:11:23,098 --> 01:11:27,870
ya kila mmoja kuwa kuhifadhi mbalimbali
vigezo na syntax ndani ya kanuni yako.

1571
01:11:27,870 --> 01:11:31,460
Na kisha hapa chini kabisa,
tuna mazingira vigezo

1572
01:11:31,460 --> 01:11:35,480
ya nini wewe ni utekelezaji ndani ya
tu mstari wako mdogo wa kanuni.

1573
01:11:35,480 --> 01:11:40,510
>> Na sisi ni kwenda tu kuvuta
katika juu ya halisi mkusanyiko sehemu.

1574
01:11:40,510 --> 01:11:43,880
Hivyo haki hapa, kama tulikuwa kuvuta
katika juu tu eneo hili la stack,

1575
01:11:43,880 --> 01:11:45,140
hii ni nini inaonekana kama.

1576
01:11:45,140 --> 01:11:48,590
Na hii ni kweli pretty muhimu
wakati nyie kuzungumzia kazi,

1577
01:11:48,590 --> 01:11:52,330
kwa sababu taarifa kwamba
kumbukumbu ya kompyuta yako

1578
01:11:52,330 --> 01:11:55,600
ni hifadhi ya vigezo
na kazi

1579
01:11:55,600 --> 01:11:58,790
na vigezo ya wote wako
kazi na vigezo yako kuu

1580
01:11:58,790 --> 01:12:00,190
katika maeneo mbalimbali.

1581
01:12:00,190 --> 01:12:03,390
>> Hivyo sasa hivi, kuu ni
kazi halisi

1582
01:12:03,390 --> 01:12:04,780
kuwa wewe ni utekelezaji katika kanuni.

1583
01:12:04,780 --> 01:12:08,050
Una vigezo wake kuhifadhiwa hapa
na vigezo yake mitaa kuhifadhiwa hapa.

1584
01:12:08,050 --> 01:12:12,270
Mitaa kutofautiana tu ina maana kutofautiana yoyote
ambazo zipo tu ndani ya kazi hiyo.

1585
01:12:12,270 --> 01:12:15,610
Na juu ya hayo, una hii
kazi tofauti inayoitwa mchemraba.

1586
01:12:15,610 --> 01:12:18,240
Una hiyo ni vigezo
kama vile wenyeji hao.

1587
01:12:18,240 --> 01:12:21,540
>> Na sababu unaweza
ona hapa ni kwamba kile

1588
01:12:21,540 --> 01:12:25,030
hutokea wakati mchemraba inachukua katika
thamani kutoka kazi yako kuu

1589
01:12:25,030 --> 01:12:27,640
ni kwamba kweli ni kuiga kwamba zaidi.

1590
01:12:27,640 --> 01:12:31,470
Hivyo kama nilitaka mchemraba
2 na kurudi 8, kwamba 2

1591
01:12:31,470 --> 01:12:33,730
ni kweli inputted
kama parameter na ni

1592
01:12:33,730 --> 01:12:37,690
kunakiliwa juu ili una hiyo iliyopo
katika maeneo mawili tofauti katika kumbukumbu.

1593
01:12:37,690 --> 01:12:40,520
Na wewe kuwa makini sana
juu ya kukumbuka ambayo moja ya wale

1594
01:12:40,520 --> 01:12:42,520
wewe ni kweli kufanyia.

1595
01:12:42,520 --> 01:12:47,170
Na mfano wa kile kilichotokea
kwamba itakuwa sana, mbaya sana

1596
01:12:47,170 --> 01:12:48,050
lipo hapa hapa.

1597
01:12:48,050 --> 01:12:50,760

1598
01:12:50,760 --> 01:12:58,650
>> Hivyo haki hapa, I have got, katika nadharia,
Mpango wa kulia hapa, kazi kuu

1599
01:12:58,650 --> 01:13:02,180
kwamba mimi nina kutangaza int x sawa 1.

1600
01:13:02,180 --> 01:13:04,505
Mimi kutangaza mwingine y int sawa na 2.

1601
01:13:04,505 --> 01:13:06,380
Na kisha mimi nina mbio
kupitia kazi hii

1602
01:13:06,380 --> 01:13:09,647
aitwaye wabadilishane, ambapo mimi kudhani kuwa
ni swapping maadili miwili.

1603
01:13:09,647 --> 01:13:11,480
Na kisha mimi nina kwenda kwa
magazeti yao nje, sawa?

1604
01:13:11,480 --> 01:13:13,220
Hiyo ni nini nataka mpango huu kufanya.

1605
01:13:13,220 --> 01:13:15,180
>> Basi hebu kuja chini na kuangalia.

1606
01:13:15,180 --> 01:13:18,200
Hivyo kama mimi kweli kuandika tofauti
kazi, kama unaweza kuona,

1607
01:13:18,200 --> 01:13:19,750
tuna kazi yetu kuu hapa.

1608
01:13:19,750 --> 01:13:22,860
Na kisha tuna yetu
kazi ya pili hapa.

1609
01:13:22,860 --> 01:13:24,520
Utupu wabadilishane.

1610
01:13:24,520 --> 01:13:27,090
Utupu tu ina maana kwamba ni
si kwenda na kurudi kitu chochote.

1611
01:13:27,090 --> 01:13:28,930
Jina kazi ni
aitwaye wabadilishane, na ni

1612
01:13:28,930 --> 01:13:33,730
kwenda ulaji vigezo mbili, int a na
int b, kutoka [inaudible] kazi yako.

1613
01:13:33,730 --> 01:13:39,010
>> Hivyo kimsingi katika hapa, tuko
kupita x na y katika kazi hii.

1614
01:13:39,010 --> 01:13:40,760
Na kama tulikuwa
kujenga Haya hivyo tunataka

1615
01:13:40,760 --> 01:13:42,420
kujenga thamani ya muda, sawa?

1616
01:13:42,420 --> 01:13:43,930
Tunakwenda kuwapa kwamba kwa.

1617
01:13:43,930 --> 01:13:45,388
Na kisha ni kwenda sasa sawa b.

1618
01:13:45,388 --> 01:13:47,660
Na b ni kwenda kuwa nyuma
ambapo thamani temp ilikuwa,

1619
01:13:47,660 --> 01:13:51,070
ambayo ni, kwa sababu wakati
unataka wabadilishane mambo,

1620
01:13:51,070 --> 01:13:52,320
huwezi tu kama kubadilishana nao.

1621
01:13:52,320 --> 01:13:54,360
>> Una kuweka moja nje
hapa ili anakumbuka

1622
01:13:54,360 --> 01:13:56,485
nini yaani, kwa sababu mara moja
wewe wabadilishane moja, kusahau

1623
01:13:56,485 --> 01:13:58,200
nini kwamba thamani ya awali ilikuwa, sawa?

1624
01:13:58,200 --> 01:14:00,990
Hivyo katika nadharia, mpango huu
wanapaswa kufanya kazi, haki?

1625
01:14:00,990 --> 01:14:03,630
Kama nilitaka wabadilishane
mbili, wanapaswa wabadilishane.

1626
01:14:03,630 --> 01:14:05,490
Basi hebu kuendesha na kuona kama ni kazi.

1627
01:14:05,490 --> 01:14:11,130

1628
01:14:11,130 --> 01:14:16,940
>> Hivyo kama wewe guys unaweza kuona, x
mara kwa mara nyingine 1 na y mara kwa mara nyingine 2.

1629
01:14:16,940 --> 01:14:21,475
Na kama mimi magazeti ya nje,
x bado ni 1 na y ni 2.

1630
01:14:21,475 --> 01:14:25,970
Hmm, mpango huu haionekani kuwa
kazi kwa njia hiyo mimi nataka kufanya kazi.

1631
01:14:25,970 --> 01:14:29,950
Je, mtu yeyote wanataka kuchukua risasi saa
kubahatisha kwa nini hii kilichojitokeza?

1632
01:14:29,950 --> 01:14:34,430
Ni ina nini na njia
kwamba mambo mbalimbali ni

1633
01:14:34,430 --> 01:14:38,172
kuhifadhiwa katika maeneo mbalimbali katika kumbukumbu.

1634
01:14:38,172 --> 01:14:39,377
>> SAWA.

1635
01:14:39,377 --> 01:14:41,960
Hivyo nyie hawana na wasiwasi
sana kuhusu hili hivi sasa.

1636
01:14:41,960 --> 01:14:46,610
Lakini tunajua kwamba mchemraba wa ndani
vigezo walikuwa na b,

1637
01:14:46,610 --> 01:14:49,230
kwa sababu hapa katika kazi yetu,
tumekuwa alitangaza a na b

1638
01:14:49,230 --> 01:14:53,570
kama vigezo ambazo zipo
ndani ya mchemraba, kazi hiyo.

1639
01:14:53,570 --> 01:14:59,490
Lakini kama unaweza kuona, vigezo kwamba
ni kuchukua katika walikuwa kuwa kuhifadhiwa hapa.

1640
01:14:59,490 --> 01:15:01,370
Lakini sisi si walikuwa kweli
kurudi kitu chochote.

1641
01:15:01,370 --> 01:15:03,120
Sisi si kweli kubadilisha x na y.

1642
01:15:03,120 --> 01:15:04,440
Sisi tu kubadilisha a na b.

1643
01:15:04,440 --> 01:15:08,340
>> Tulikuwa kunakiliwa x na y katika
kitu kinachoitwa a na b.

1644
01:15:08,340 --> 01:15:11,092
Lakini sisi kamwe kweli
kijanja x na y wenyewe.

1645
01:15:11,092 --> 01:15:12,800
Je, wewe guys kuona
jinsi yale yanayotokea?

1646
01:15:12,800 --> 01:15:16,140
Ni kwamba tumekuwa tu kunakiliwa
juu, lakini sisi si kweli naendelea

1647
01:15:16,140 --> 01:15:18,030
wimbo wa ambapo walikuwa katika kumbukumbu.

1648
01:15:18,030 --> 01:15:20,127
>> Na hivyo sasa kompyuta
ni kutafuta, loo, nimekuwa

1649
01:15:20,127 --> 01:15:21,960
kukimbia jambo hili kupitia
kazi hii nzuri.

1650
01:15:21,960 --> 01:15:23,690
Lakini x na y bado ni x na y.

1651
01:15:23,690 --> 01:15:26,240
Hakuna kitu kilichotokea kwa
nao kwa sababu ya ukweli

1652
01:15:26,240 --> 01:15:28,340
kwamba vigezo wale
na vigezo mitaa

1653
01:15:28,340 --> 01:15:30,150
kuhifadhiwa katika tofauti
mahali katika kumbukumbu.

1654
01:15:30,150 --> 01:15:32,030
Na hii ni ngazi ya juu
dhana kwamba tutaweza

1655
01:15:32,030 --> 01:15:34,300
kuanza kuona baadaye katika shaka.

1656
01:15:34,300 --> 01:15:36,950
Lakini tu kujua kwamba hii ni
Tatizo ambayo yanaweza kutokea

1657
01:15:36,950 --> 01:15:41,400
na kwamba tutaweza kufikiri njia ya jinsi ya
kukabiliana na hii baadaye katika shaka.

1658
01:15:41,400 --> 01:15:41,900
SAWA.

1659
01:15:41,900 --> 01:15:47,750

1660
01:15:47,750 --> 01:15:48,250
Sawa.

1661
01:15:48,250 --> 01:15:51,780
Hivyo dhana mwisho tuko
kweli kwenda kufunika

1662
01:15:51,780 --> 01:15:53,880
ambayo inaenda kuwa na manufaa
kwa pset wiki hii

1663
01:15:53,880 --> 01:15:56,060
ni kile kinachojulikana
hoja mstari amri.

1664
01:15:56,060 --> 01:16:00,820
Hivyo Rob katika hotuba yake akaenda kwa njia ya
aina ya ufupi juu ya jinsi hizi kazi.

1665
01:16:00,820 --> 01:16:02,770
Kimsingi kujua kwamba
wakati wewe ni kuandika

1666
01:16:02,770 --> 01:16:06,280
kama kazi kuu, wakati sisi
aliandika kazi kabla katika siku za nyuma,

1667
01:16:06,280 --> 01:16:07,804
tulikuwa int kuu utupu.

1668
01:16:07,804 --> 01:16:10,470
Na sababu tulikuwa na utupu pale
Ilikuwa kwa sababu mipango yetu hakufanya hivyo

1669
01:16:10,470 --> 01:16:12,520
haja ya maadili ya pembejeo kuendesha, sawa?

1670
01:16:12,520 --> 01:16:16,020
Wakati mimi mbio Mario, sikuweza haja
kwa kweli aina tu katika kitu

1671
01:16:16,020 --> 01:16:16,970
wakati mimi mbio Mario.

1672
01:16:16,970 --> 01:16:20,170
Mimi naweza kuchochea mtumiaji baadaye.

1673
01:16:20,170 --> 01:16:22,450
Lakini hiyo si mara zote kuwa kesi.

1674
01:16:22,450 --> 01:16:24,980
>> Kwa mfano, katika hii
Tatizo wiki seti,

1675
01:16:24,980 --> 01:16:28,365
wewe ni kwenda kuulizwa kwamba, katika
Mbali na kuendesha programu yako,

1676
01:16:28,365 --> 01:16:30,990
wewe ni kwenda kutaka pembejeo
mambo fulani katika moja kwa moja kama wewe

1677
01:16:30,990 --> 01:16:32,050
kuendesha programu yako.

1678
01:16:32,050 --> 01:16:34,720
Hivyo njia sisi kufanya hivyo kuitwa
mstari amri hoja, ambayo

1679
01:16:34,720 --> 01:16:37,280
ni kama hoja
unaweza pembejeo moja kwa moja

1680
01:16:37,280 --> 01:16:39,260
kama wewe ni kujaribu kuendesha programu yako.

1681
01:16:39,260 --> 01:16:44,680
>> Hivyo nukuu kwa hii,
ni pretty ngumu-kuangalia,

1682
01:16:44,680 --> 01:16:47,320
lakini ni kweli si kwamba
magumu. Hivyo int main--

1683
01:16:47,320 --> 01:16:48,910
hiyo ni kazi yako kuu.

1684
01:16:48,910 --> 01:16:52,110
Ndani ya argc comma mabano kamba argv.

1685
01:16:52,110 --> 01:16:56,040
Hivyo yote yale kusema ni kwamba hii
int yote argc kuwaambia wewe

1686
01:16:56,040 --> 01:17:00,560
ni kwamba wale ni idadi ya
hoja ya kompyuta wanapaswa kutarajia.

1687
01:17:00,560 --> 01:17:03,130
>> Kwa hiyo, jambo moja kwamba ni kweli
muhimu kuweka wimbo wa

1688
01:17:03,130 --> 01:17:07,080
ni jina kimwili ya mpango wako
makosa kama moja ya hoja hizo.

1689
01:17:07,080 --> 01:17:11,080
Hivyo kama mimi alitaka kuwa na mpango wangu
kukimbia pamoja na moja ya ziada mstari amri

1690
01:17:11,080 --> 01:17:13,310
Hoja, mimi nina kweli
kwenda na mbili.

1691
01:17:13,310 --> 01:17:15,080
Argc ni kweli kwenda kuwa mbili.

1692
01:17:15,080 --> 01:17:18,010
Na kisha kamba argv
bracket-- yote ni kufanya,

1693
01:17:18,010 --> 01:17:20,410
ni kunipa
safu ya masharti kwamba

1694
01:17:20,410 --> 01:17:24,870
kwenda kuonyesha tu na kuhifadhi kile
wote wa wale hoja mstari amri ni.

1695
01:17:24,870 --> 01:17:34,090
>> Hivyo kwa mfano, kama alitaka kuwa hii
mpango, ./copy infile outfile, haki?

1696
01:17:34,090 --> 01:17:37,330
Hiyo tu ya kawaida Linux amri.

1697
01:17:37,330 --> 01:17:38,830
Ni nini hasa ni argc?

1698
01:17:38,830 --> 01:17:41,320
Jinsi mstari amri hoja nyingi
je, kuna kweli katika hili?

1699
01:17:41,320 --> 01:17:45,130
Wote hii haina ni kufanya nakala ya
infile ya jina la faili moja

1700
01:17:45,130 --> 01:17:47,070
na nakala yake ndani ya
faili mwingine, sawa?

1701
01:17:47,070 --> 01:17:48,700
Hayo ni yote hii ni kufanya.

1702
01:17:48,700 --> 01:17:53,080
Kama unaweza kuona, mimi nina kufanya hivyo kwenye mstari mmoja
bila kweli wanaohitaji mpango.

1703
01:17:53,080 --> 01:17:55,380
>> Argc yetu katika kesi hii ni nini?

1704
01:17:55,380 --> 01:17:58,968
Jinsi hoja nyingi tuna?

1705
01:17:58,968 --> 01:17:59,634
Watazamaji: Tatu?

1706
01:17:59,634 --> 01:18:01,200
ANDI PENG: Tuna tatu, hasa.

1707
01:18:01,200 --> 01:18:05,030
Hivyo ni Intuitive sana kwa
tu kufikiri kwamba ni tu

1708
01:18:05,030 --> 01:18:06,290
infile na outfile.

1709
01:18:06,290 --> 01:18:10,190
Lakini tunajua kwamba jina kimwili ya
Mpango wewe ni mbio makosa kama moja.

1710
01:18:10,190 --> 01:18:13,220
Hivyo katika kesi hii, argc ni kweli tatu.

1711
01:18:13,220 --> 01:18:15,860
Vipi kuhusu, ni nini argv 0?

1712
01:18:15,860 --> 01:18:18,180
Kumbuka, yote ya
hoja mstari amri

1713
01:18:18,180 --> 01:18:20,500
walikuwa kuhifadhiwa katika safu ya masharti.

1714
01:18:20,500 --> 01:18:24,140
Hivyo kama mimi kujaribu kupata hiyo, ni nini
ingekuwa argv mabano 0 nipe?

1715
01:18:24,140 --> 01:18:25,364
>> Watazamaji: [inaudible].

1716
01:18:25,364 --> 01:18:26,155
ANDI PENG: Hasa.

1717
01:18:26,155 --> 01:18:28,550
Itakuwa nipe nukta
kufyeka nakala, kwa sababu hiyo ni

1718
01:18:28,550 --> 01:18:31,070
kipengele 0,
sehemu ya kwanza ya safu yangu.

1719
01:18:31,070 --> 01:18:33,236
Je kuhusu argv 1?

1720
01:18:33,236 --> 01:18:33,945
>> Watazamaji: Infile.

1721
01:18:33,945 --> 01:18:35,070
ANDI PENG: Infile, hasa.

1722
01:18:35,070 --> 01:18:36,272
Je kuhusu argv 2?

1723
01:18:36,272 --> 01:18:37,022
Watazamaji: Outfile.

1724
01:18:37,022 --> 01:18:38,190
ANDI PENG: Outfile.

1725
01:18:38,190 --> 01:18:39,290
Hii ni kidogo suala gumu sasa.

1726
01:18:39,290 --> 01:18:42,630
Nini guys kufikiri argv
3 ni kwenda kuwa kunipa

1727
01:18:42,630 --> 01:18:45,522
kama mimi walijaribu magazeti kwamba nje?

1728
01:18:45,522 --> 01:18:48,260
>> Watazamaji: [inaudible]?

1729
01:18:48,260 --> 01:18:50,164
>> ANDI PENG: Je, una mkono up?

1730
01:18:50,164 --> 01:18:50,663
Naam.

1731
01:18:50,663 --> 01:18:51,550
>> Watazamaji: mbadala.

1732
01:18:51,550 --> 01:18:52,341
>> ANDI PENG: Hasa.

1733
01:18:52,341 --> 01:18:55,440
Basi kumbuka katika hotuba kwamba sisi
na mwisho wa mashindano kitu

1734
01:18:55,440 --> 01:18:56,640
aitwaye null Terminator?

1735
01:18:56,640 --> 01:18:58,890
Tutaweza kupata katika hii pia
zaidi juu ya darasani.

1736
01:18:58,890 --> 01:19:02,472
Lakini tunajua kwamba katika nukuu,
njia kompyuta yako

1737
01:19:02,472 --> 01:19:04,430
anajua kwamba ni mwisho
wa safu ni kwamba

1738
01:19:04,430 --> 01:19:07,310
unaweka kitu kinachoitwa null
Terminator au dash sifuri.

1739
01:19:07,310 --> 01:19:12,047
>> Hivyo kama wewe kujaribu kupata argv 3,
wewe ni kwenda kugonga hii dash 0.

1740
01:19:12,047 --> 01:19:13,630
Hii ni hata zaidi ya swali hila.

1741
01:19:13,630 --> 01:19:17,020
Je kuhusu argv 4?

1742
01:19:17,020 --> 01:19:20,920
Hivyo hii ni nyuma null Terminator,
siku za nyuma mipaka ya safu yetu.

1743
01:19:20,920 --> 01:19:24,380
Je, unafikiri ni kwenda
kutokea wakati sisi kujaribu kufanya hivyo?

1744
01:19:24,380 --> 01:19:25,842
>> Watazamaji: [inaudible]?

1745
01:19:25,842 --> 01:19:26,550
ANDI PENG: Sorry?

1746
01:19:26,550 --> 01:19:28,025
Kusema kwamba kidogo nguvu zaidi?

1747
01:19:28,025 --> 01:19:29,086
>> Watazamaji: [inaudible].

1748
01:19:29,086 --> 01:19:29,710
ANDI PENG: Ndiyo.

1749
01:19:29,710 --> 01:19:32,420
Hiyo ni jina la
eneo utasikia zaidi uwezekano kupata.

1750
01:19:32,420 --> 01:19:36,610
Lakini tunajua kwamba argv 4--
kwamba utapata kupata

1751
01:19:36,610 --> 01:19:38,610
maeneo katika kompyuta yako
kumbukumbu kwamba kwa kweli

1752
01:19:38,610 --> 01:19:41,650
haipaswi kuwa kugusa, kwa sababu
sasa hivi unajua nini argv ni.

1753
01:19:41,650 --> 01:19:46,220
Unajua kwamba ni safu ya ukubwa 3
ambayo ina nukta nakala, infile na outfile.

1754
01:19:46,220 --> 01:19:50,200
>> Kama wewe kujaribu kwenda mbali zaidi ya hapo
kwamba wewe ni nyuma null Terminator,

1755
01:19:50,200 --> 01:19:53,050
kompyuta yako ina pengine
kuhifadhiwa kitu katika argv 4.

1756
01:19:53,050 --> 01:19:55,790
Na kwa kweli haipaswi kuwa
kuruhusiwa upatikanaji katika argv 4,

1757
01:19:55,790 --> 01:19:58,130
kwa sababu una faili
baraza la mawaziri na uko tu

1758
01:19:58,130 --> 01:19:59,790
kuruhusiwa upatikanaji wa wale rafu tatu.

1759
01:19:59,790 --> 01:20:02,870
Lakini kama wewe kujaribu kufikia njia zaidi
rafu ya ambapo wewe ni kuruhusiwa,

1760
01:20:02,870 --> 01:20:04,930
wewe ni kwenda kuanza messing na
mambo mengine katika kumbukumbu ya kompyuta yako.

1761
01:20:04,930 --> 01:20:06,690
Hiyo inaenda kuwa kweli, kweli mbaya.

1762
01:20:06,690 --> 01:20:07,440
Hivyo tu kujua kwamba.

1763
01:20:07,440 --> 01:20:10,370
Kuwa makini sana kwamba wewe
si tu nasibu kuanza

1764
01:20:10,370 --> 01:20:14,772
kupata mambo katika safu kwamba
hawakuwa katika nini alitaka kujenga.

1765
01:20:14,772 --> 01:20:17,114
Yep.

1766
01:20:17,114 --> 01:20:18,430
>> SAWA.

1767
01:20:18,430 --> 01:20:26,360
Hivyo sisi ni kwenda kufanya mwingine
wastaafu mfano hapa.

1768
01:20:26,360 --> 01:20:27,300
SAWA.

1769
01:20:27,300 --> 01:20:29,900
Hivyo Rob haraka katika hotuba
siku nyingine alikwenda

1770
01:20:29,900 --> 01:20:35,040
kupitia mfano huu, ambapo yeye
alikuwa int kuu int argc kamba argv

1771
01:20:35,040 --> 01:20:39,090
mabano, ambayo ni akiniambia kwamba mimi nina
kwenda na hoja mstari amri.

1772
01:20:39,090 --> 01:20:41,860
>> Ana, ikiwa argc ni sawa na
sawa 2-- kumbuka,

1773
01:20:41,860 --> 01:20:45,070
sawa sawa maana kulinganisha.

1774
01:20:45,070 --> 01:20:47,980
Kama ni sawa na 2, basi mimi nina
kwenda magazeti hodi,

1775
01:20:47,980 --> 01:20:51,190
chochote kwanza
kipengele cha safu ni.

1776
01:20:51,190 --> 01:20:54,100
Mwingine magazeti, hujambo dunia.

1777
01:20:54,100 --> 01:20:56,300
Kile ni hii kwenda
kutokea kimsingi?

1778
01:20:56,300 --> 01:21:00,570
Je, mtu tu kueleza katika
Kiingereza nini mpango huu ni kufanya?

1779
01:21:00,570 --> 01:21:01,272
Naam.

1780
01:21:01,272 --> 01:21:08,160
>> Watazamaji: Kama mtu typed katika amri
akasema majina yao ya kwanza na ya mwisho,

1781
01:21:08,160 --> 01:21:12,096
itakuwa si tu magazeti
kwanza moja na kusema, hello,

1782
01:21:12,096 --> 01:21:14,090
jina lolote yako ya kwanza ni.

1783
01:21:14,090 --> 01:21:15,410
>> ANDI PENG: Sawa, hebu kukimbia nayo.

1784
01:21:15,410 --> 01:21:22,470
Hivyo kwa mfano, kama ningekuwa kufanya
faili hili kufanya hello to-- hodi

1785
01:21:22,470 --> 01:21:24,500
to-- je, unataka mimi pembejeo?

1786
01:21:24,500 --> 01:21:25,900
>> Watazamaji: wa kwanza na jina la mwisho.

1787
01:21:25,900 --> 01:21:27,280
>> ANDI PENG: Kwanza na jina la mwisho?

1788
01:21:27,280 --> 01:21:28,180
Nafasi?

1789
01:21:28,180 --> 01:21:29,690
>> Watazamaji: Naam.

1790
01:21:29,690 --> 01:21:33,490
>> ANDI PENG: Je, mtu kuwaambia
mimi hivi sasa, ni nini argc?

1791
01:21:33,490 --> 01:21:35,630
Haki tu huko?

1792
01:21:35,630 --> 01:21:36,290
Lo, pole.

1793
01:21:36,290 --> 01:21:37,920
Hebu kwenda nyuma.

1794
01:21:37,920 --> 01:21:40,740
Jinsi mstari amri hoja nyingi
are-- nyie kweli hawezi kuona.

1795
01:21:40,740 --> 01:21:43,760
Lakini nitajaribu kuvuta.

1796
01:21:43,760 --> 01:21:44,290
Ninajaribu.

1797
01:21:44,290 --> 01:21:45,414
Naam, kuna tatu, sawa?

1798
01:21:45,414 --> 01:21:48,750
Ni dot slash ni hodi,
ni Andi, na ni Peng.

1799
01:21:48,750 --> 01:21:51,870
>> Basi je, wewe guys kufikiri hii
Mpango ni kwenda kuwa uchapishaji nje?

1800
01:21:51,870 --> 01:21:55,550

1801
01:21:55,550 --> 01:21:56,060
Loo.

1802
01:21:56,060 --> 01:21:57,120
Oh, pole.

1803
01:21:57,120 --> 01:21:57,810
Jina sahihi.

1804
01:21:57,810 --> 01:22:03,630

1805
01:22:03,630 --> 01:22:06,130
Ni uchapishaji nje, hello dunia.

1806
01:22:06,130 --> 01:22:09,603
Je, mtu yeyote wanataka kueleza
nini kinatokea?

1807
01:22:09,603 --> 01:22:10,103
Yeah?

1808
01:22:10,103 --> 01:22:11,019
>> Watazamaji: [inaudible].

1809
01:22:11,019 --> 01:22:14,439

1810
01:22:14,439 --> 01:22:15,230
ANDI PENG: Hasa.

1811
01:22:15,230 --> 01:22:19,940
Hivyo hapa, ni masharti
ni, kama argc ni sawa sawa na 2.

1812
01:22:19,940 --> 01:22:23,650
Hivyo tu katika kesi hiyo kuna
mbili hoja mstari amri.

1813
01:22:23,650 --> 01:22:25,850
Kisha mimi nina kwenda magazeti,
hello, chochote ni.

1814
01:22:25,850 --> 01:22:28,210
Lakini kingine, mimi nina kwenda kwa
magazeti tu, hello dunia.

1815
01:22:28,210 --> 01:22:30,040
Hivyo haina mtu unataka
kunipa mfano

1816
01:22:30,040 --> 01:22:35,050
ya jinsi napenda kuwa na uwezo wa kweli
kupata hiyo na magazeti thamani ya argv 1?

1817
01:22:35,050 --> 01:22:38,600
>> Kitu gani mimi kuwa na pembejeo hapa?

1818
01:22:38,600 --> 01:22:39,840
Jambo moja tu, sawa?

1819
01:22:39,840 --> 01:22:42,900
Kwa sababu nukta hello tayari
makosa kama hoja ya kwanza.

1820
01:22:42,900 --> 01:22:43,930
Mimi tu moja zaidi.

1821
01:22:43,930 --> 01:22:46,470
Hivyo dot hodi kama mimi tu kufanya Andi.

1822
01:22:46,470 --> 01:22:47,270
Hello, Andi.

1823
01:22:47,270 --> 01:22:49,186
Je, kila mtu kuelewa
nini kinatokea?

1824
01:22:49,186 --> 01:22:49,602
Naam.

1825
01:22:49,602 --> 01:22:52,500
>> Watazamaji: Hivyo nafasi kati
amri line-- ni [inaudible]?

1826
01:22:52,500 --> 01:22:56,247

1827
01:22:56,247 --> 01:22:56,830
ANDI PENG: Hapana

1828
01:22:56,830 --> 01:23:03,810
Hivyo nafasi katika mstari amri
hoja, X, kuwaambia kompyuta yako

1829
01:23:03,810 --> 01:23:06,820
kwamba hii ni mwanzo wa kamba mpya.

1830
01:23:06,820 --> 01:23:11,130
Hivyo kamba argv here-- ni maduka
wote wa amri yako hoja mstari

1831
01:23:11,130 --> 01:23:13,110
katika masharti.

1832
01:23:13,110 --> 01:23:17,420
Na hivyo nafasi katika mstari amri
argument-- zote kwamba hana ni nawaambia,

1833
01:23:17,420 --> 01:23:21,030
hii ni mwisho wa kamba mmoja
na ni wakati wa kuendelea na mwingine.

1834
01:23:21,030 --> 01:23:21,990
>> Naam.

1835
01:23:21,990 --> 01:23:23,530
Hii ni pretty muhimu kwa
pset yako, kwa sababu wewe ni

1836
01:23:23,530 --> 01:23:24,613
kwenda kuwa kupima haya.

1837
01:23:24,613 --> 01:23:29,300
Hivyo haina mtu yeyote kuwa
maswali yoyote juu ya hili?

1838
01:23:29,300 --> 01:23:30,016
OK, baridi.

1839
01:23:30,016 --> 01:23:30,515
Yeah?

1840
01:23:30,515 --> 01:23:35,008
>> Watazamaji: Hivyo sababu wewe ungekuwa
kuweka integer hoja calc badala

1841
01:23:35,008 --> 01:23:40,059
ya [inaudible] itakuwa wakati unataka
aina ya maelezo ya ziada kwa

1842
01:23:40,059 --> 01:23:41,030
[Inaudible]?

1843
01:23:41,030 --> 01:23:42,090
>> ANDI PENG: Yeah, kwa uhakika.

1844
01:23:42,090 --> 01:23:45,370
Baadhi ya programu itahitaji
pembejeo mstari amri hoja

1845
01:23:45,370 --> 01:23:47,732
kwamba unapita katika na ambayo inatumia huo.

1846
01:23:47,732 --> 01:23:49,035
Naam.

1847
01:23:49,035 --> 01:23:50,410
Watazamaji: Hivyo nini kama [inaudible]?

1848
01:23:50,410 --> 01:23:55,440

1849
01:23:55,440 --> 01:23:58,870
>> ANDI PENG: Naam, je, nina
kubadili kisha katika mpango wangu?

1850
01:23:58,870 --> 01:23:59,870
>> Watazamaji: 3 tu.

1851
01:23:59,870 --> 01:24:12,460

1852
01:24:12,460 --> 01:24:15,020
>> ANDI PENG: Kwa nini ni kwamba
kinachotokea, unafikiri?

1853
01:24:15,020 --> 01:24:18,940
>> Watazamaji: Kwa sababu [inaudible].

1854
01:24:18,940 --> 01:24:22,370
>> Watazamaji: Ningependa kuwa na
mabadiliko hayo kwa 2 [inaudible].

1855
01:24:22,370 --> 01:24:23,484
>> Watazamaji: 1 na 2.

1856
01:24:23,484 --> 01:24:24,650
ANDI PENG: 1 na 2, hasa.

1857
01:24:24,650 --> 01:24:29,150
Hivyo katika kesi hii, wewe ingekuwa pengine
wanataka kuwa na mbili printf statements--

1858
01:24:29,150 --> 01:24:32,601
moja kwamba kuchapishwa argv 1 na
moja kwamba kuchapishwa argv 2.

1859
01:24:32,601 --> 01:24:33,100
Hapa.

1860
01:24:33,100 --> 01:24:34,516
Mimi kweli anaweza kufanya hivyo haraka kweli.

1861
01:24:34,516 --> 01:24:46,720

1862
01:24:46,720 --> 01:24:47,320
Kuna kwenda.

1863
01:24:47,320 --> 01:24:48,287
Loo.

1864
01:24:48,287 --> 01:24:49,370
Si kabisa nini alitaka.

1865
01:24:49,370 --> 01:24:52,590
Lakini kama nyie fujo karibu na
formatting, itakuwa nje.

1866
01:24:52,590 --> 01:24:54,981
Naam.

1867
01:24:54,981 --> 01:24:55,480
Baridi.

1868
01:24:55,480 --> 01:24:57,670
Najua sisi ni kidogo mfupi juu ya muda.

1869
01:24:57,670 --> 01:25:02,469
Lakini mimi nina kwenda tu haraka kutumia
dakika kadhaa kwenda kwa helpful--

1870
01:25:02,469 --> 01:25:03,760
Watazamaji: Una dakika mbili.

1871
01:25:03,760 --> 01:25:05,010
ANDI PENG: Nina dakika mbili?

1872
01:25:05,010 --> 01:25:06,340
Asante.

1873
01:25:06,340 --> 01:25:09,180
Baadhi ya haraka pset tips.

1874
01:25:09,180 --> 01:25:13,100
Hivyo kwa pset hii, Mimi sana kupendekeza,
kama nilivyosema, kila mtu kusoma spec.

1875
01:25:13,100 --> 01:25:16,804
Wewe utakuwa kuandika tatu programs-- moja
aitwaye initials.c, yeye anayeitwa caesar.c,

1876
01:25:16,804 --> 01:25:17,720
mtu mmoja aitwaye vigenere.c.

1877
01:25:17,720 --> 01:25:20,465

1878
01:25:20,465 --> 01:25:22,340
Baadhi ya vidokezo muhimu kwamba
nyie kweli wanataka

1879
01:25:22,340 --> 01:25:25,040
kuweka katika mind-- hivyo
kuna kazi hii

1880
01:25:25,040 --> 01:25:27,770
aitwaye atoi-- kama mimi kama kusema, trois.

1881
01:25:27,770 --> 01:25:29,520
Haieleweki kama hiyo
kweli jinsi gani kusema hivyo.

1882
01:25:29,520 --> 01:25:32,510
Lakini wote ni kufanya, ni inputting.

1883
01:25:32,510 --> 01:25:34,320
Ni waongofu kamba kwa int.

1884
01:25:34,320 --> 01:25:37,490
Hivyo inawakilisha ASCII kwa i integer.

1885
01:25:37,490 --> 01:25:40,310
Ni kuwabadili ASCII tu
maadili kwa integer maadili.

1886
01:25:40,310 --> 01:25:44,510
Basi kumbuka argv, safu kwamba maduka
wote wa amri yako kujipanga arguments--

1887
01:25:44,510 --> 01:25:46,300
ni maduka yao yote kama masharti.

1888
01:25:46,300 --> 01:25:50,010
Na hivyo kama unataka kuwa na uwezo wa
kuwa mmoja wao kuwa integer,

1889
01:25:50,010 --> 01:25:52,750
wewe ni kwenda na
kutumia thamani huu hapa.

1890
01:25:52,750 --> 01:25:56,690
>> Modulo, kama sisi kufunikwa
mapema katika darasa leo,

1891
01:25:56,690 --> 01:25:59,550
utapata kuwa
salio ya chochote una.

1892
01:25:59,550 --> 01:26:03,620
Hivyo kama tuna kweli, kweli
idadi kubwa katika Kaisari,

1893
01:26:03,620 --> 01:26:06,117
nini kama tuna mwisho
ya kamba ya Vigenere?

1894
01:26:06,117 --> 01:26:08,450
Jinsi ni wewe kwenda kuwa na uwezo
kupata kwamba kufungia?

1895
01:26:08,450 --> 01:26:11,330
Kama mimi kugonga z na nataka
ni kurudi kwenye,

1896
01:26:11,330 --> 01:26:13,650
jinsi mimi kwenda kupata
kwamba kufungia?

1897
01:26:13,650 --> 01:26:15,960
Pengine wanataka kutumia
modulo katika pale mahali fulani.

1898
01:26:15,960 --> 01:26:19,190
>> Pili, kuvinjari kuzunguka
maktaba yako. ctype.h.

1899
01:26:19,190 --> 01:26:20,680
Hiyo ni maktaba mpya tuna.

1900
01:26:20,680 --> 01:26:25,270
Utakuta mengi ya kweli, kweli
muhimu functions-- isupper, islower,

1901
01:26:25,270 --> 01:26:27,681
toupper, tolower, isalpha, nakadhalika.

1902
01:26:27,681 --> 01:26:30,680
Kazi zote kwamba itakuwa muhimu sana
wakati wewe ni kujaribu kufikiri,

1903
01:26:30,680 --> 01:26:33,780
ni tabia hii barua lowercase?

1904
01:26:33,780 --> 01:26:35,730
Je, mimi kubadili hii
kamba kwa uppercase?

1905
01:26:35,730 --> 01:26:38,146
Mambo haya yote itakuwa sana,
msaada sana kwa pset yako.

1906
01:26:38,146 --> 01:26:42,720

1907
01:26:42,720 --> 01:26:45,500
SAWA.

1908
01:26:45,500 --> 01:26:49,644
>> Ofisi ya masaa usiku wa leo ni 8:00 kwa
11:00 katika TEAL darasani kesho

1909
01:26:49,644 --> 01:26:51,310
kama vile Jumatano na Alhamisi usiku.

1910
01:26:51,310 --> 01:26:53,280
Masaa ya ofisi ni katika commons.

1911
01:26:53,280 --> 01:26:56,180
Sana kupendekeza nyie
zote kupata kuanza mara moja,

1912
01:26:56,180 --> 01:27:00,490
kwa sababu wewe hawataki kuwa kwamba
mtoto ambaye Alhamisi usiku ana matatizo

1913
01:27:00,490 --> 01:27:03,870
kuwasilisha pset yako na ni
kama, sijui nini cha kufanya.

1914
01:27:03,870 --> 01:27:05,870
Mimi kuanza, mimi kumaliza, mimi kuwasilishwa.

1915
01:27:05,870 --> 01:27:09,737
Jaribu kujipa baadhi ya chumba,
kwa sababu katika matatizo kificho daima kutokea.

1916
01:27:09,737 --> 01:27:11,570
Wewe unataka kuhakikisha
kwamba wewe kutoa mwenyewe

1917
01:27:11,570 --> 01:27:14,810
muda mwingi kuweza
kukamilisha psets.

1918
01:27:14,810 --> 01:27:15,310
Baridi.

1919
01:27:15,310 --> 01:27:16,720
Mimi itabidi hutegemea kuzunguka hapa.

1920
01:27:16,720 --> 01:27:18,226
>> Watazamaji: Je, hii ni online tayari?

1921
01:27:18,226 --> 01:27:20,850
ANDI PENG: Sijui kama ni
online tayari, lakini itakuwa.

1922
01:27:20,850 --> 01:27:23,500
Mimi itabidi hutegemea kuzunguka hapa kama kuna mtu
ina maswali yoyote tayari.

1923
01:27:23,500 --> 01:27:25,390
Shukrani kwa kuja.

1924
01:27:25,390 --> 01:27:27,105