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>> [Music kucheza]

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>> Hii ni CS50 Harvard
kuanzishwa Chuo Kikuu cha

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00:00:19,170 --> 00:00:22,070
kwa akili
makampuni ya sayansi ya kompyuta

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na sanaa ya programu.

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Na jina langu ni David Malan, na
Mimi nilikuwa tu kufikiri asubuhi hii,

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imekuwa ni ya kushangaza miaka 20 leo
tangu mimi iliyopita ameketi ambapo guys kufanya sasa.

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>> Ilikuwa 1996.

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Nilikuwa sophomore, na mimi alikuwa kuchukua
CS50 kwa mara ya kwanza.

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Na sikuwa hata wamezipata up ujasiri
kuchukua ni mimi mwenyewe Freshman mwaka,

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sehemu kwa sababu ya muda.

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Sayansi ya kompyuta kwangu
ilikuwa aina ya kama, meh.

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Nilikuwa kidogo ya geek kuongezeka
up, lakini mimi si kweli

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kuwa yoyote ya kiakili
maslahi katika kile kinachoonekana

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kwa kuwa tu rundo zima la
watu programu wakati wote.

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>> Na mimi nilikuwa hofu kuwa waaminifu.

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Bila shaka na sayansi ya kompyuta zaidi
ujumla walikuwa na kwa kiasi fulani,

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bado ina sifa hii ya uwanja kwa
tahadhari, kama tu kwa sababu wengi wetu

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ni usio wa kawaida na hali hiyo na uhakika wa hayo.

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Na ni kweli Haikuwa mpaka mimi shopped
darasa hili kwamba sophomore fall--

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na hata basi, mimi tu waliojiunga
kwa sababu professor--

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moja wa washauri wangu wa kwanza, Brian
Kernighan sasa katika Princeton--

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kuruhusiwa mimi kuchukua darasa kupita kushindwa.

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Na hakika, kwamba ni kwa nini
leo sisi kuruhusu na kuhimiza

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wanafunzi kuchukua darasa hili ameketi / unsat.

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>> Na kisha tu, na
mwisho wa muhula

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mimi kutambua kama, wow, hii
Haikuwa kama uwanja usio wa kawaida.

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Hakika, huu ulikuwa
sana kuwawezesha shamba,

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na zaidi excitingly,
hasa baadaye,

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kama mimi alichukua kozi katika
Makubwa Arts 101 na Amerika A

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na kisha hatimaye
grad shule archeology,

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je, mimi kwa kweli kuanza kuona
makutano ya uwanja huu, kompyuta

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sayansi, na masomo ya kibinadamu,
sayansi ya asili, sanaa, dawa,

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na kama.

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Na hivyo kwamba ni nini hivyo tu
nadhifu kuhusu sayansi ya kompyuta

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hatimaye, kama tunatarajia utasikia
see-- ni applicability yake

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na maeneo mengine haya, na jinsi gani unaweza
kuchukua baadhi ya leo na muhula

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mawazo na ujuzi wa vitendo
nyuma ya uwanja yako mwenyewe,

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na kwa kweli kuchunguza makutano hii
ya sanaa huria na sayansi.

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>> Hivyo 73% ya wewe, kama mwisho
mwaka ni dalili yoyote,

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hawajawahi kuchukuliwa shaka CS kabla.

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Hivyo kama, kama mimi, wewe ni
hisia kidogo kidogo

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hofu, au kusema ukweli wewe si
uhakika kwa nini wewe hata hapa.

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Labda tu ikifuatiwa baadhi
marafiki juu ya Sanders hivi sasa.

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Hiyo ni kabisa faini.

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Lengo hapa ni kunasa
wewe na kuwahakikishia wewe

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kwamba kama huna kuangalia kwa
kushoto na kulia,

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wewe ni kwenda kuona wanafunzi na
kama uzoefu kidogo au hata

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kuwa wewe mwenyewe anaweza kuwa.

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Na hakika, tutaweza kushiriki
baadhi ya takwimu baadaye leo

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kama yale idadi ya watu ya
tabaka la kawaida kuangalia kama.

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>> Na kama aliongeza reassurance-- na sisi hii
je maana tangu mimi alichukua juu ya mwendo

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baadhi ya miaka ago-- katika
mtaala wa kozi

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ni hii kwamba kile hatimaye
masuala katika kozi hii

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si sana ambapo mwisho
up jamaa na wanafunzi wako,

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lakini ambapo katika wiki 11, mwisho wa
muhula, kuishia jamaa na wewe mwenyewe

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katika wiki 0, ambayo ni
ambapo sisi ni hapa leo.

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Na hii ni nini mimi barabara
wale wote miaka iliyopita.

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Na najua mengi ya
madarasa kusema hii, lakini ni

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kweli hasa katika sayansi ya kompyuta.

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Mwisho wa siku, shamba hili
siyo rahisi kufahamika kama ilivyokuwa kwangu

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na inaweza kuwa na wewe, ni kweli
tu kuhusu utatuzi wa matatizo.

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Na kama vile, haina na hii
applicability ya kupata maeneo mengine.

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Na kwa kweli, kama sisi alijaribu
distill nini maana ya hii,

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hii ni kutatua tatizo
katika asili yake, mimi daresay.

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Kuna pembejeo hivyo chochote
ni kwamba wewe ni kujaribu kutatua.

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Kuna pato, ambayo ni hopefully
ufumbuzi wa tatizo hilo.

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Na kisha, kama tunataka
kusema katika sayansi ya kompyuta,

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kuna sanduku hii nyeusi katika
katikati kwamba si lazima

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kuwa na huduma ya juu jinsi kazi.

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Wewe mwenyewe hatimaye wapate
kutekeleza nini ndani ya boksi hilo.

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Lakini kwa madhumuni ya leo na zaidi
kwa ujumla katika maisha, kila unaowajali

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ni kwamba matatizo haya kupata kutatuliwa.

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>> Na nini shaka hii ni
hatimaye kuhusu ni kuchunguza

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makutano ya
hizi pembejeo na mazao,

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na hawa wanaoitwa
algorithms, kama tutaweza hivi karibuni kuona,

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kwamba kutekeleza kile ni
chini huko, kofia.

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Lakini hizi pembejeo na hizi outputs--
ni nini kwamba kweli maana?

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Naam, mwisho wa siku, tunahitaji
baadhi ya njia za kuwasilisha taarifa.

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Hii ni kweli hasa katika kompyuta,
ambayo kama dhana na ngumu kwani

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inaweza kuonekana, ni kifaa pretty bubu.

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Inachukua electricity-- kama kutoka
cable au betri kama pembejeo

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na kisha inazalisha baadhi
majibu preprogramed kwenye screen.

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>> Lakini jinsi gani sisi kupata kutoka
kuanza kumaliza huko?

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Naam, ni nini tatizo kutatuliwa?

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Naam, labda tunaweza, katika
mwanzo wa muhula yoyote,

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kujaribu kuchukua mahudhurio
katika chumba kama hii.

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Hivyo mimi ili kufanya kama moja, mbili, tatu.

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Au labda, kama mimi alifanya hivyo
kwa aina ya kuweka wimbo

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ya myself-- kuweka wimbo wa things--
Mimi naweza haraka kukimbia nje ya vidole.

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Hivyo mimi ili tu kufanya hash marks-- moja
mtu, mbili, tatu, nne, tano, sita,

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saba, nane.

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Na sisi sote tuna pengine
jambo hili, iwe juu ya mikono yako

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au kwenye kipande cha karatasi.

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Na hii ni kweli tu
kitu kinachoitwa unary notation--

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ambapo kama wewe tu na barua moja
katika alfabeti yako, moja au hash

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alama katika kesi hii, kwa kila
pembejeo unataka kuhesabu,

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unahitaji kuweka chini mmoja wa haya
letters-- moja ya alama hizi.

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>> Sawa.

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Hayo ni yote faini na wema na
si wote kuwa ngumu.

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Lakini kompyuta si wote
kwamba mengi zaidi ngumu.

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Hakika, wengi pengine
kujua hata kama wameweza si kweli

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kuchukuliwa nini maana ya hii, kwamba
kompyuta tu kuelewa zeros

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na ones-- mfumo kinachojulikana mapacha.

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Sisi binadamu, kwa kulinganisha, ni hivyo
kiasi kisasa zaidi kadiri

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kama sisi kuelewa zeros kupitia nines.

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>> Lakini hata kama binary ni, kwa mara ya kwanza
mtazamo, si wote kwamba utambuzi,

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ni zamu nje ni kama tu mifumo
na mawazo kwamba sisi tayari kujua.

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Hivyo kwa mfano, fikiria hili.

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Hii ni mlolongo wa ishara.

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Na nyote, wakati
glancing katika hayo, pengine

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kufikiri 123-- chochote
kweli kuvutia huko.

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Lakini ni kwa nini idadi hii, 123?

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Hizi ni baadhi tu glyphs juu ya
screen-- chati tu

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kwamba mtu anaweza kuwa inayotolewa au typed.

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Lakini kama wewe ni kama mimi, wewe
pengine kukumbuka kutoka shule ya daraja

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kwamba kuna watu aina ya
nguzo au maeneo hapa.

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Kuna sehemu moja na
kumi ya mahali na mahali pa mia ya.

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Na sababu kwamba hii ni 123 na
si tu mfano wa alama tatu

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ni kwa sababu, bila shaka, kama sisi
kuwa moja katika mamia mahali,

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kufanya math ya mara 100 moja,
na kisha mbili katika nafasi kumi.

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Hivyo hiyo ni 10 mara 2, na kisha tatu katika
sehemu moja na hiyo ni 1 mara 3.

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Na wakati kuongeza wote wa wale up, wa
Bila shaka, unaweza kupata 100 plus 20 plus 3.

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>> Hivyo sisi ilianza na tu mfano
ya symbols-- alphabet--

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lakini basi sisi mapped maana kwenye
ni kwa njia ya nguzo hizi.

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Naam, zinageuka kuwa
kompyuta ni kweli si

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kwamba tofauti yote kutoka wewe na mimi.

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Lakini badala ya kutumia nguvu za 10,
hivyo kusema 1, 10, 100, 1000,

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10,000 mahali na hivyo
sana aliye mzaa wao kweli

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tu kutumia nguvu za 2--
hivyo moja, 2, 4, na kisha

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kama sisi kuweka tatu zaidi, 8, 16,
32, 64, 128, na kadhalika.

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Na hivyo hii ni jinsi ya kompyuta
kitawakilisha idadi 0,

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tu kama sisi binadamu.

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>> 0, 0, 0-- na pengine unaweza nadhani
nini mfano wa zeros na ndio,

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kama kompyuta Unaweza tu
kusema 0 au 1-- nini

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mfano ni kwenda kuwakilisha
idadi sisi binadamu kujua kama 1?

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Yeah-- 0, 0, 1.

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Sawa.

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Hivyo 0, 0, 1 ni jinsi sisi kuwakilisha
1, hivyo unaweza kuwa na kutega kisha

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kuiwakilisha namba 2, kama una
mahali nne na nafasi mbili ya

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kama sehemu moja, unaweza kusema, vizuri,
kama tulikuwa 1 katika sehemu moja ya,

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na sasa tunataka
kuhesabu hadi 2, waweza

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kufanya hivyo na kuondoka hii kuwa sifuri.

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Lakini bila shaka hii si jinsi
mfumo decimal kazi ama.

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Kama kuweka tarakimu katika
wote wawili wa nguzo hizo,

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nimepata kufanya hesabu.

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Hivyo idadi kile alichofanya mimi
ajali ya kuwakilisha tu?

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00:07:01,930 --> 00:07:06,710
>> Hivyo ni 3, kwa sababu mara 2 1 plus 1
mara 1, bila shaka, inatupa tatu.

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Hivyo hii itakuwa ni mbili.

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bit aina ya flips, hivyo kusema, kama 0
inakuwa moja, kiasi kama majukumu 9 juu ya

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na inakuwa 0 wakati ukibeba 1.

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Hii basi itakuwa tatu bila shaka.

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Four-- kitu kingine ya kuvutia
hutokea, ambapo ndio unaendelea juu

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na kubeba 1, hivyo kusema.

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Hivyo hii, bila shaka, ni 4.

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00:07:23,320 --> 00:07:25,160
>> Lakini kama wewe kufunga mbele sasa,
nini idadi kubwa ya kwenda

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00:07:25,160 --> 00:07:26,660
kuwa kwamba kompyuta inaweza kuwakilisha?

157
00:07:26,660 --> 00:07:30,420

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Hivyo ni saba tu katika kesi hii, sawa?

159
00:07:32,380 --> 00:07:35,570
Kwa sababu una moja katika nne,
moja katika mbili, moja kwa moja.

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00:07:35,570 --> 00:07:36,900
Hivyo hiyo ni 4 plus 2 plus 1.

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00:07:36,900 --> 00:07:37,972
Hivyo kwamba anatoa saba.

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00:07:37,972 --> 00:07:39,680
Na hakika, ingekuwa
kuonekana katika mtazamo wa kwanza

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kwamba kompyuta unaweza kuhesabu
hakuna zaidi ya hii.

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>> Lakini hii bila shaka si kweli.

165
00:07:45,210 --> 00:07:48,243
Tufanye nini binadamu kufanya wakati tunataka
kuhesabu juu kuliko kama 999?

166
00:07:48,243 --> 00:07:51,000

167
00:07:51,000 --> 00:07:53,900
Tu kubeba mmoja na tu
kuongeza tarakimu nne upande wa kushoto.

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Na hivyo kweli kweli tunaweza.

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Tunaweza kuwa na nane
mahali na nafasi ya 16 ya,

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na 32 ya nafasi, 64, 128-- na wewe
unaweza kuweka tu kinachoendelea hadi infinity.

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Basi hizi zeros na ones--
kinachojulikana binary system--

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ni nini kompyuta mwanasayansi ingekuwa
ujumla kuwaita bit, au binary tarakimu.

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>> Lakini sasa, ni jinsi gani sisi kupata kutoka
dhana au graphics ya mambo haya

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kwa kompyuta halisi?

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00:08:14,620 --> 00:08:17,170
Sisi wanaonekana kuwa kuruka hatua hapa.

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Naam, pembejeo tu mwishoni
wa siku, kwa mbali yangu hapa

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ni mtiririko huu wa umeme.

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Hata kama imekuwa ni muda mrefu
muda tangu mawazo kuhusu

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au kamwe mawazo kuhusu
jinsi ya umeme kazi,

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kuna elektroni inapita katika au
nje, na hiyo ni aina yangu ya pembejeo.

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>> Hivyo kama kwamba wote kuwa tuko
kupata kama mchango hapa,

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nini tunaweza kufanya na habari kwamba?

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00:08:36,830 --> 00:08:40,040
Naam, sisi kufikiri ya sifuri kama
tu kukosekana kwa umeme.

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00:08:40,040 --> 00:08:42,540
Hakuna kitu flowinw, hakuna kitu ni
kusonga, hakuna kitu kinachotokea.

185
00:08:42,540 --> 00:08:44,690
Hiyo ni chaguo-msingi state-- zero tu.

186
00:08:44,690 --> 00:08:48,200
Lakini kama kuna umeme inapita, kwa nini
je, sisi tu kiholela, lakini kimataifa

187
00:08:48,200 --> 00:08:50,250
mfululizo, wito kwamba moja.

188
00:08:50,250 --> 00:08:54,760
>> Hivyo tu kwa kutokuwa na uwezo,
tuna zero, ndiyo nguvu,

189
00:08:54,760 --> 00:08:57,520
tuna one-- hakuna nguvu, ndiyo madaraka.

190
00:08:57,520 --> 00:09:01,520
Na kwa njia hiyo, kwa kutumia kitu
zaidi kimwili au elektroniki

191
00:09:01,520 --> 00:09:05,340
sisi kuanza kutekeleza wazo hili la
kitu ama kuwa moja au sifuri.

192
00:09:05,340 --> 00:09:07,230
Hakika, tunaweza tu kufanya hivyo zaidi ya hapa.

193
00:09:07,230 --> 00:09:10,590
Hivyo hapa, mimi sina tatu lakini
nane balbu mwanga, ambayo kila mmoja

194
00:09:10,590 --> 00:09:11,810
ina kubadili yake mwenyewe.

195
00:09:11,810 --> 00:09:15,760
>> Na hivyo kama nilitaka kuwakilisha
namba saba hapa,

196
00:09:15,760 --> 00:09:18,510
Nipate kurejea kwenye hizi tatu balbu mwanga.

197
00:09:18,510 --> 00:09:21,470
Na hakika, ndani ya
kompyuta yangu ni mamilioni,

198
00:09:21,470 --> 00:09:25,650
mabilioni ya mambo ambayo ni tu
ndogo kuliko ile, iitwayo transistors,

199
00:09:25,650 --> 00:09:27,330
swichi, kwamba wewe tu kugeuka na mbali.

200
00:09:27,330 --> 00:09:30,420
Basi hizi ni big-- kiasi
swichi big-- ndani ya laptop-- yangu

201
00:09:30,420 --> 00:09:32,150
watu wengi, wengi, wengi,
wengi swichi zaidi.

202
00:09:32,150 --> 00:09:35,160
Lakini wote kufanya ni hasa that--
kumbadilisha juu, kumbadilisha off.

203
00:09:35,160 --> 00:09:38,076
Na kama vile, kompyuta inaweza kuwakilisha,
pamoja na mamilioni hayo au mabilioni

204
00:09:38,076 --> 00:09:40,480
ya transistors, kura na
kura ya zeros na ndio.

205
00:09:40,480 --> 00:09:43,160
Na kuna vifaa vingine bado kuwa
inakuwezesha kuhifadhi maelezo ya muda mrefu,

206
00:09:43,160 --> 00:09:45,243
hivyo kwamba wakati wewe vuta
kuziba, huna kupoteza yake.

207
00:09:45,243 --> 00:09:46,900
Lakini hiyo ni hadithi kwa siku nyingine.

208
00:09:46,900 --> 00:09:51,170
>> Basi nini tunaweza kufanya na bits hizi?

209
00:09:51,170 --> 00:09:54,309
Tunaweza tu kuchukua
shinikizo mbali ya mimi

210
00:09:54,309 --> 00:09:56,600
inaweza mtu wanataka kuja
hapa na mtoe demo?

211
00:09:56,600 --> 00:09:57,516
Niliona hii mkono kwanza.

212
00:09:57,516 --> 00:09:58,709
Jina lako nani?

213
00:09:58,709 --> 00:09:59,250
MADAY: Maday.

214
00:09:59,250 --> 00:10:00,542
DAVID Malan: Maday, kuja juu juu.

215
00:10:00,542 --> 00:10:01,250
Nimefurahi kukutana na wewe.

216
00:10:01,250 --> 00:10:02,390
MADAY: Nice kukutana na wewe.

217
00:10:02,390 --> 00:10:02,930
>> DAVID Malan: Njoo kwa njia hii.

218
00:10:02,930 --> 00:10:04,182
Mimi si kuwa na mdomo wewe up.

219
00:10:04,182 --> 00:10:04,682
Sawa.

220
00:10:04,682 --> 00:10:11,090
Hivyo hapa, tuna, notice-- moja, two--
tutaweza hariri kwamba out-- moja, mbili, nne,

221
00:10:11,090 --> 00:10:13,350
nane, 16, 32, 64, 128.

222
00:10:13,350 --> 00:10:14,220
Hii ni makusudi.

223
00:10:14,220 --> 00:10:17,370
Kuna bits nane here--
binary zeros digits-- na ndio.

224
00:10:17,370 --> 00:10:21,460
Na bit ni muhimu kitengo cha measure--
si kama muhimu kitengo cha kipimo

225
00:10:21,460 --> 00:10:21,999
kwenye yenyewe.

226
00:10:21,999 --> 00:10:24,290
Kwa kawaida, unataka angalau
nane ya mambo haya, kwa jina lingine

227
00:10:24,290 --> 00:10:24,790
Byte.

228
00:10:24,790 --> 00:10:26,230
Hivyo tuna byte ya bits hapa.

229
00:10:26,230 --> 00:10:31,130
>> Hivyo kama sisi alitaka changamoto kwa,
Kwa mfano, unaozungumzia, katika binary,

230
00:10:31,130 --> 00:10:33,230
thamani hii here-- 42.

231
00:10:33,230 --> 00:10:35,140
Wanataka kuchukua kumchoma katika hiyo?

232
00:10:35,140 --> 00:10:36,034
>> MADAY: [inaudible].

233
00:10:36,034 --> 00:10:38,700
DAVID Malan: Yeah, tu kushinikiza
swichi nyeupe kidogo mbele.

234
00:10:38,700 --> 00:10:41,290
Na unataka Spell
nje 42, na kwa ajili ya grabs

235
00:10:41,290 --> 00:10:44,061
ni hii dhiki CS50
mpira kama wewe kupata hii.

236
00:10:44,061 --> 00:10:44,560
Sawa.

237
00:10:44,560 --> 00:10:46,420
Hivyo kuwa 32.

238
00:10:46,420 --> 00:10:48,430
Sisi ni kwenda haja 42.

239
00:10:48,430 --> 00:10:51,410
Hivyo hiyo ni nane, hivyo hiyo ni 40.

240
00:10:51,410 --> 00:10:54,160
Na excellent-- vizuri mno kufanyika.

241
00:10:54,160 --> 00:10:55,186
Asante.

242
00:10:55,186 --> 00:10:58,790
>> [Makofi]

243
00:10:58,790 --> 00:10:59,290
Sawa.

244
00:10:59,290 --> 00:11:00,623
Hivyo tuna moja zaidi matatizo mpira.

245
00:11:00,623 --> 00:11:03,595
Hebu kufanya hili mara moja zaidi kama tunaweza.

246
00:11:03,595 --> 00:11:05,368
Mtu mwingine kujitolea?

247
00:11:05,368 --> 00:11:07,970
Bure matatizo mpira, bure matatizo mpira.

248
00:11:07,970 --> 00:11:08,470
SAWA.

249
00:11:08,470 --> 00:11:11,640
Zaidi ya hapa katikati,
kufanya unataka kuja chini?

250
00:11:11,640 --> 00:11:14,100
Sawa.

251
00:11:14,100 --> 00:11:15,552
Najua.

252
00:11:15,552 --> 00:11:16,360
Kuna sisi kwenda.

253
00:11:16,360 --> 00:11:20,818
>> Hivyo idadi here-- kuja juu chini.

254
00:11:20,818 --> 00:11:21,567
Jina lako nani?

255
00:11:21,567 --> 00:11:21,984
>> DAVEY: Davey.

256
00:11:21,984 --> 00:11:22,820
>> DAVID Malan: Davey.

257
00:11:22,820 --> 00:11:23,320
SAWA.

258
00:11:23,320 --> 00:11:24,810
Kuja juu juu, Davey.

259
00:11:24,810 --> 00:11:25,890
Nimefurahi kukutana na wewe.

260
00:11:25,890 --> 00:11:28,639
Na nini tunakwenda kuwa na wewe
spell-- kama unaweza linger kuna

261
00:11:28,639 --> 00:11:32,810
kwa moment-- moja tu ni idadi 50.

262
00:11:32,810 --> 00:11:36,293
Lakini, lakini, lakini lakini, lakini, haya ni
sumaku daraja shule kwa sababu.

263
00:11:36,293 --> 00:11:39,370

264
00:11:39,370 --> 00:11:43,327
Tu got vigumu kidogo, wote haki?

265
00:11:43,327 --> 00:11:44,160
Bado kuna nane.

266
00:11:44,160 --> 00:11:46,820

267
00:11:46,820 --> 00:11:47,320
Sawa.

268
00:11:47,320 --> 00:11:48,486
Basi je, tuna juu ya huko?

269
00:11:48,486 --> 00:11:51,356
Tuna 32.

270
00:11:51,356 --> 00:11:54,344
Nice.

271
00:11:54,344 --> 00:11:58,610
32 plus 16 inatupa 48-- hivyo karibu.

272
00:11:58,610 --> 00:12:00,390
Na ajabu.

273
00:12:00,390 --> 00:12:02,831
Hongera Davey vilevile.

274
00:12:02,831 --> 00:12:05,720
>> [Makofi]

275
00:12:05,720 --> 00:12:06,516
>> Sawa.

276
00:12:06,516 --> 00:12:09,390
Hivyo tunaweza kufanya hivyo siku zote muda mrefu, na
haina kupata yote kwamba mengi zaidi

277
00:12:09,390 --> 00:12:10,800
kuvutia na changamoto zaidi.

278
00:12:10,800 --> 00:12:13,250
Lakini hiyo ni kweli point--
ni jinsi rahisi

279
00:12:13,250 --> 00:12:16,930
ni, mwisho wa siku, nini a
kompyuta gani ya kuhifadhi habari,

280
00:12:16,930 --> 00:12:21,740
kuhifadhi pembejeo na hatimaye
kuhifadhi au kuwakilisha matokeo hayo.

281
00:12:21,740 --> 00:12:23,750
Lakini idadi peke yake si
kwamba kuvutia wote.

282
00:12:23,750 --> 00:12:26,069
>> Hivyo binadamu, baadhi ya miaka iliyopita,
aliamua, unajua nini?

283
00:12:26,069 --> 00:12:27,860
Itakuwa nzuri kama
kompyuta walikuwa si tu

284
00:12:27,860 --> 00:12:31,030
calculators kwa hesabu
shughuli, lakini kwa kweli naweza

285
00:12:31,030 --> 00:12:35,209
kufanya mambo kama neno usindikaji, au
barua pepe, au incarnations kisasa zaidi

286
00:12:35,209 --> 00:12:36,500
wa aina hii ya teknolojia.

287
00:12:36,500 --> 00:12:40,680
Na hivyo dunia aliamua
kiholela, lakini ulimwenguni,

288
00:12:40,680 --> 00:12:44,380
kwamba kama unataka kuhifadhi mji mkuu
barua A katika kompyuta, unajua nini?

289
00:12:44,380 --> 00:12:47,730
Hebu tu wote wanakubaliana kuhifadhi
baadhi mfano wa zeros na ones--

290
00:12:47,730 --> 00:12:52,422
bits-- kwamba hatimaye
inawakilisha idadi decimal 65.

291
00:12:52,422 --> 00:12:53,630
Tutaweza tu wote wanakubaliana juu ya jambo hilo.

292
00:12:53,630 --> 00:12:56,620
>> 66 kitawakilisha B,
67 kitawakilisha C,

293
00:12:56,620 --> 00:13:00,210
na kuna mashada ya chati nyingine ya
zeros na ndio, au namba msingi,

294
00:13:00,210 --> 00:13:02,224
ambacho kitawakilisha
barua nyingine bado.

295
00:13:02,224 --> 00:13:04,390
Hivyo kama wewe aina ya kiakili
kunyonya hii kwa muda,

296
00:13:04,390 --> 00:13:10,900
Mimi kwa makusudi kuweka A kupitia
I, ambapo H 72 na mimi ni 73.

297
00:13:10,900 --> 00:13:15,830
Kama kompyuta kisha, katika mazingira ya
mpango usindikaji neno au barua pepe,

298
00:13:15,830 --> 00:13:19,620
umebaini chini ya kofia ya kuwa na
chati hizi ni muundo bits--

299
00:13:19,620 --> 00:13:22,500
ya bits anayewakilisha
72, kisha 73, kisha 33--

300
00:13:22,500 --> 00:13:26,640
nini kinaweza huu Spell katika mpango huo?

301
00:13:26,640 --> 00:13:28,150
>> Hivyo hi, na kisha kitu.

302
00:13:28,150 --> 00:13:31,460
Sisi si lazima kujua, lakini kwa kweli
33-- si kwenye chati earlier--

303
00:13:31,460 --> 00:13:33,170
Ilikuwa tu mshangao uhakika.

304
00:13:33,170 --> 00:13:38,870
Hivyo 72 alikuwa H, 73 ni mimi, 33 hutokea
kuwa hatua Moderators bado.

305
00:13:38,870 --> 00:13:41,719
Lakini hiyo yote mzuri na mwema,
na kwa kweli siku hizi, badala ya

306
00:13:41,719 --> 00:13:43,760
kutumia tu saba au nane
bits, shukrani kwa kitu

307
00:13:43,760 --> 00:13:46,530
aitwaye Unicode kinyume
kwa ASCII nyuma katika siku,

308
00:13:46,530 --> 00:13:50,010
sisi kweli wanaweza kuwakilisha hata zaidi
wahusika kuvutia kuliko tu

309
00:13:50,010 --> 00:13:52,980
hizi English awali upendeleo barua.

310
00:13:52,980 --> 00:13:56,030
Lakini tunaweza pia kuwakilisha hata
mambo neater kama rangi.

311
00:13:56,030 --> 00:13:59,750
>> Kama wameweza milele kusikia kifupi
RGB, nyekundu, kijani, bluu, kwamba

312
00:13:59,750 --> 00:14:03,510
tu ina maana kwamba kompyuta
kawaida anatumia seti tatu ya bits--

313
00:14:03,510 --> 00:14:06,760
baadhi ya idadi ya bits kwamba kuwakilisha
idadi kwa kiasi gani nyekundu unataka,

314
00:14:06,760 --> 00:14:08,940
mwingine seti ya bits kwa
kiasi gani kijani unataka,

315
00:14:08,940 --> 00:14:11,430
na mwingine kuweka idadi ya
kiasi gani bluu unataka.

316
00:14:11,430 --> 00:14:14,457
Hivyo idadi kubwa ina maana kura ya
nyekundu, idadi ndogo ina maana hakuna nyekundu.

317
00:14:14,457 --> 00:14:16,290
Na hizi zote ni aina
maadili katikati hapa.

318
00:14:16,290 --> 00:14:20,180
>> Hivyo kunipatia nyekundu, kunipatia
kijani, na kunipa kidogo ya bluu.

319
00:14:20,180 --> 00:14:24,260
Na kama wewe kuchanganya wale vivuli tatu
ya rangi pamoja, katika kesi hii,

320
00:14:24,260 --> 00:14:26,850
kupata kivuli hii usaha
ya njano au kahawia.

321
00:14:26,850 --> 00:14:32,330
Lakini hiyo mfano wa nane plus
nane plus eight-- hivyo 24 bits--

322
00:14:32,330 --> 00:14:36,550
kushoto na kulia, ni jinsi ya kompyuta
kitawakilisha kwamba rangi fulani.

323
00:14:36,550 --> 00:14:38,090
Sasa hii ni nukta kwenye screen.

324
00:14:38,090 --> 00:14:42,230
Kama ukiangalia kweli karibu katika TV yako yako
kompyuta, utaona dots au saizi.

325
00:14:42,230 --> 00:14:45,420
Na kama una gridi ya taifa zima la
saizi, usawa na wima,

326
00:14:45,420 --> 00:14:46,630
una picha.

327
00:14:46,630 --> 00:14:49,029
Na kisha kama wewe kuchukua
picha na kisha safisha

328
00:14:49,029 --> 00:14:52,070
ukajionyeshe picha nyingine, mwingine
picha, picha nyingine, picha nyingine,

329
00:14:52,070 --> 00:14:54,760
kweli kasi, wewe bila shaka kuwa na sinema.

330
00:14:54,760 --> 00:14:56,109
>> Na hivyo taarifa ambapo sisi kuanza.

331
00:14:56,109 --> 00:14:57,650
Sisi ilianza na zeros hizo na ndio.

332
00:14:57,650 --> 00:15:00,570
Sisi kazi kutoka huko desimali
idadi, jinsi sisi kuwawakilisha.

333
00:15:00,570 --> 00:15:02,070
Sasa tuna herufi za alfabeti.

334
00:15:02,070 --> 00:15:05,664
Lakini katika mazingira mengine kusubiri, tunaweza kutumia
chache bits zaidi na kuwakilisha rangi.

335
00:15:05,664 --> 00:15:07,830
Haraka kama una
uwezo wa kuwakilisha rangi,

336
00:15:07,830 --> 00:15:11,200
una uwezo wa kuwakilisha
picha na gifs animated

337
00:15:11,200 --> 00:15:13,780
na wahusika wengine kama kwenye screen.

338
00:15:13,780 --> 00:15:17,160
Na wakati una rundo zima la
picha kuruka kwa binadamu kwa mara moja,

339
00:15:17,160 --> 00:15:21,480
inaonekana kama picha mwendo,
na hivyo kupata video pia.

340
00:15:21,480 --> 00:15:23,460
>> Hivyo kwa kutumia hizi sana
primitives rahisi kufanya sisi

341
00:15:23,460 --> 00:15:28,070
kuwa njia ya anayewakilisha
hatimaye wote wa aina hizi za vyombo vya habari.

342
00:15:28,070 --> 00:15:30,450
Na tumekuwa yanayotumika tena
na tena na tena, mpaka sisi

343
00:15:30,450 --> 00:15:33,467
kupata kutoka ngazi ya chini kabisa
ngazi hii ya juu.

344
00:15:33,467 --> 00:15:35,550
Hivyo kwamba inatupa huu
ujumla wazo la kufikirika tu.

345
00:15:35,550 --> 00:15:36,990
Lakini sisi ilianza hapa.

346
00:15:36,990 --> 00:15:38,790
>> Hapa sasa, tupate
kuwakilisha katika kompyuta

347
00:15:38,790 --> 00:15:41,920
pembejeo yetu na zeros na ndio,
mazao yetu katika zeros na ndio,

348
00:15:41,920 --> 00:15:43,640
lakini yale yanayoendelea ndani ya boksi?

349
00:15:43,640 --> 00:15:46,080
Hiyo ambapo kompyuta
sayansi anapata kuvutia.

350
00:15:46,080 --> 00:15:49,770
Hiyo ambapo kweli kuleta yako
akili mwenyewe wa kubeba kutatua matatizo.

351
00:15:49,770 --> 00:15:52,590
Sasa tunaweza inasema, kwa
mapumziko ya muhula, ndiyo.

352
00:15:52,590 --> 00:15:53,870
Najua matendo jinsi binary.

353
00:15:53,870 --> 00:15:57,942
Nakumbuka jinsi Ascii au Unicode--
ramani ya letters-- kazi.

354
00:15:57,942 --> 00:15:59,650
Na hakika anasimama
kwa sababu ya kuwa sisi

355
00:15:59,650 --> 00:16:03,470
kunaweza kuwakilisha nyekundu na kijani na
bluu, na kuwakilisha multimedia kama vile.

356
00:16:03,470 --> 00:16:05,390
Lakini hii ni ya kuvutia mambo ya ajabu.

357
00:16:05,390 --> 00:16:09,790
Hii ni nini hufanya mtu
uwezo wa kutatua matatizo.

358
00:16:09,790 --> 00:16:11,980
>> Na moja tatizo kama
sisi kama kwa kufanya, kwa kweli,

359
00:16:11,980 --> 00:16:15,345
ni kuchukua mahudhurio, au
kufanya hili algorithmically.

360
00:16:15,345 --> 00:16:16,470
Na tena, mimi ili kufanya hii.

361
00:16:16,470 --> 00:16:19,580
Mimi ili kufanya moja, mbili, tatu, nne
tano, sita, saba, nane na tisa.

362
00:16:19,580 --> 00:16:21,520
Na mimi naweza kuandika ni
chini ya kuweka wimbo wa ni.

363
00:16:21,520 --> 00:16:23,769
Lakini hiyo ni jinsi mimi ingekuwa
kuwakilisha habari.

364
00:16:23,769 --> 00:16:27,550
Au mimi naweza kufanya hili faster-- mbili, nne,
sita, nane, kumi, 12, 14, 16, 18, 20,

365
00:16:27,550 --> 00:16:30,380
22-- anahisi kama mara mbili
haraka lakini bado ni

366
00:16:30,380 --> 00:16:32,050
kwenda kuchukua mengi yote ya wakati.

367
00:16:32,050 --> 00:16:35,990
>> Lakini zinageuka, kama sisi kujiinua bado
mwingine resource-- na kwa kweli kompyuta

368
00:16:35,990 --> 00:16:38,940
siku hizi na CPUs mbalimbali au bongo.

369
00:16:38,940 --> 00:16:41,970
Ni zinageuka kompyuta Unaweza
kufanya kura ya mambo kwa mara moja,

370
00:16:41,970 --> 00:16:44,460
na kwa kweli sisi, katika chumba hiki,
wanaweza kuwakilisha hasa hili.

371
00:16:44,460 --> 00:16:47,130
>> Hivyo ni kidogo kijamii
Awkward, lakini kama wewe ungekuwa ucheshi yangu

372
00:16:47,130 --> 00:16:51,550
kwa ajili tu mchakato wa hatua tatu, hebu
mimi kuuliza kila mtu katika nafasi kuna tu

373
00:16:51,550 --> 00:16:54,640
kusimama kwa muda.

374
00:16:54,640 --> 00:16:57,380
Simama.

375
00:16:57,380 --> 00:17:01,580
Hivyo kufikiri mwenyewe, idadi
one-- hivyo kila mtu katika nafasi hii,

376
00:17:01,580 --> 00:17:05,010
ila watu ambao hawakuwa
kumlazimu, ni kufikiri namba moja.

377
00:17:05,010 --> 00:17:06,510
Hivyo kwamba ni namba yako hivi sasa.

378
00:17:06,510 --> 00:17:09,399
Hiyo ni hatua ya kwanza, au kama
kompyuta mwanasayansi au programu

379
00:17:09,399 --> 00:17:11,827
ingekuwa kawaida kufanya, tunakwenda
kuanza kuhesabu saa sifuri.

380
00:17:11,827 --> 00:17:14,410
Kama idadi ndogo tunaweza
kuwakilisha na balbu wale mwanga

381
00:17:14,410 --> 00:17:17,410
ni sifuri, na tu kuwaacha
yote mbali, mimi ili kama vile tu

382
00:17:17,410 --> 00:17:19,271
kuanza kuhesabu kutoka
sifuri ni badala ya moja.

383
00:17:19,271 --> 00:17:21,020
Na hivyo kwamba ni nini
kompyuta wanasayansi kufanya.

384
00:17:21,020 --> 00:17:23,750
Hivyo hatua sifuri, kusimama na
kufikiria namba moja.

385
00:17:23,750 --> 00:17:26,339
hatua ya pili ni hii jozi
mbali na mtu amesimama

386
00:17:26,339 --> 00:17:27,660
na kuongeza idadi yako pamoja.

387
00:17:27,660 --> 00:17:30,660

388
00:17:30,660 --> 00:17:32,850
Ajabu.

389
00:17:32,850 --> 00:17:37,640
>> Hivyo kwa wakati huu katika muda,
literally kila mtu kushiriki

390
00:17:37,640 --> 00:17:41,930
ni mawazo ya namba 2, isipokuwa
kwa mtu mmoja odd kama tuna

391
00:17:41,930 --> 00:17:43,450
idadi isiyo ya kawaida ya watu katika chumba.

392
00:17:43,450 --> 00:17:50,640
Na sasa hatua ya tatu hapa ni kwenda
kuwa Haya moja ya unapaswa kukaa chini.

393
00:17:50,640 --> 00:17:54,490
Moja ya unapaswa kukaa chini,
na kama wewe ni bado amesimama,

394
00:17:54,490 --> 00:17:56,590
kwenda nyuma ya hatua moja.

395
00:17:56,590 --> 00:18:44,799

396
00:18:44,799 --> 00:18:45,790
Sawa.

397
00:18:45,790 --> 00:19:00,760

398
00:19:00,760 --> 00:19:01,650
Sawa.

399
00:19:01,650 --> 00:19:03,880
Hivyo watu zaidi na zaidi
lazima kuwa wamekaa chini.

400
00:19:03,880 --> 00:19:08,280
Taarifa kwamba hii ina ikiwa
a loop-- aina fulani ya mzunguko.

401
00:19:08,280 --> 00:19:11,983
Baadhi ya unapaswa kuwa awkwardly kukwama,
kwenda na kurudi kati ya hatua moja

402
00:19:11,983 --> 00:19:14,180
na mbili, moja na mbili, moja na mbili.

403
00:19:14,180 --> 00:19:21,190

404
00:19:21,190 --> 00:19:21,810
Hiyo ni sawa.

405
00:19:21,810 --> 00:19:22,630
mdudu yetu ya kwanza.

406
00:19:22,630 --> 00:19:24,740
Tutaweza kukabiliana na kwamba.

407
00:19:24,740 --> 00:19:25,320
Sawa.

408
00:19:25,320 --> 00:19:27,370
Hebu jaribu kuchochea mambo pamoja.

409
00:19:27,370 --> 00:19:31,454
>> Katika nadharia, mtu mmoja tu amesimama
kama kila mtu inaendelea jozi mbali.

410
00:19:31,454 --> 00:19:33,870
Lakini ngoja kasi ya mambo up
pamoja na watu bado amesimama.

411
00:19:33,870 --> 00:19:35,480
Nini idadi ni wewe kufikiria?

412
00:19:35,480 --> 00:19:36,070
46.

413
00:19:36,070 --> 00:19:36,570
SAWA.

414
00:19:36,570 --> 00:19:37,820
Kwenda mbele na kukaa chini.

415
00:19:37,820 --> 00:19:39,190
You guys bado amesimama.

416
00:19:39,190 --> 00:19:42,130
Nani bado amesimama?

417
00:19:42,130 --> 00:19:45,240
Nini idadi ni wewe kufikiria?

418
00:19:45,240 --> 00:19:46,160
SAWA.

419
00:19:46,160 --> 00:19:47,900
>> Hivyo tutaweza kuja nyuma yenu.

420
00:19:47,900 --> 00:19:49,630
Katika nyuma?

421
00:19:49,630 --> 00:19:50,790
Hiyo ni nini?

422
00:19:50,790 --> 00:19:53,100
22.

423
00:19:53,100 --> 00:19:56,540
OK mtu mwingine up top-- yeah?

424
00:19:56,540 --> 00:19:57,720
34.

425
00:19:57,720 --> 00:19:58,300
SAWA.

426
00:19:58,300 --> 00:20:02,780
Zaidi ya hapa juu ya right-- yangu hapa?

427
00:20:02,780 --> 00:20:06,820
132, nzuri sana.

428
00:20:06,820 --> 00:20:08,380
22?

429
00:20:08,380 --> 00:20:08,990
>> SAWA.

430
00:20:08,990 --> 00:20:10,031
Na ambaye ni bado amesimama?

431
00:20:10,031 --> 00:20:11,000
Hapa?

432
00:20:11,000 --> 00:20:14,520
46, nzuri sana.

433
00:20:14,520 --> 00:20:16,890
72.

434
00:20:16,890 --> 00:20:18,220
Siwezi duka tena sana.

435
00:20:18,220 --> 00:20:20,520
Yeah?

436
00:20:20,520 --> 00:20:22,490
30, nzuri.

437
00:20:22,490 --> 00:20:24,120
Hapa?

438
00:20:24,120 --> 00:20:26,200
23?

439
00:20:26,200 --> 00:20:27,270
23.

440
00:20:27,270 --> 00:20:30,920
>> Na nadhani hiyo ni kila mtu
isipokuwa wewe guys, hakuna shinikizo.

441
00:20:30,920 --> 00:20:32,860
Oh, ngoja.

442
00:20:32,860 --> 00:20:33,360
28?

443
00:20:33,360 --> 00:20:37,500

444
00:20:37,500 --> 00:20:38,281
nane tu.

445
00:20:38,281 --> 00:20:38,780
SAWA.

446
00:20:38,780 --> 00:20:41,030
nane tu.

447
00:20:41,030 --> 00:20:42,580
Chini hapa?

448
00:20:42,580 --> 00:20:44,570
30.

449
00:20:44,570 --> 00:20:47,344
23.

450
00:20:47,344 --> 00:20:47,843
24.

451
00:20:47,843 --> 00:20:50,810

452
00:20:50,810 --> 00:20:52,310
18.

453
00:20:52,310 --> 00:20:54,690
Hii ni utekelezaji mbaya
ya algorithm hii milele.

454
00:20:54,690 --> 00:20:55,190
SAWA.

455
00:20:55,190 --> 00:20:59,760
Hivyo mtu mwingine?

456
00:20:59,760 --> 00:21:00,421
Mtu mwingine yeyote?

457
00:21:00,421 --> 00:21:00,920
SAWA.

458
00:21:00,920 --> 00:21:03,300
Moja zaidi.

459
00:21:03,300 --> 00:21:04,400
16?

460
00:21:04,400 --> 00:21:04,900
SAWA.

461
00:21:04,900 --> 00:21:05,510
16.

462
00:21:05,510 --> 00:21:06,010
Sawa.

463
00:21:06,010 --> 00:21:09,070
Hivyo kama mimi si amekosa mtu yeyote katika
glare hapa, wakati mimi hit Enter,

464
00:21:09,070 --> 00:21:13,091
tutaona, algorithmically,
jumla ya idadi ya watu katika Sanders.

465
00:21:13,091 --> 00:21:16,340
Kwa sababu tena, ni kana kwamba kila mtu
kama wewe wakaketi, kupita namba yako mbali

466
00:21:16,340 --> 00:21:19,215
kwa mtu mwingine, kwa mtu mwingine,
kwa mtu mwingine, hivyo kwamba katika nadharia,

467
00:21:19,215 --> 00:21:22,304
katika mwisho, moja tu Awkward
mtu lazima kushoto amesimama.

468
00:21:22,304 --> 00:21:22,970
Lakini hiyo ni faini.

469
00:21:22,970 --> 00:21:24,290
Sisi sped mambo up manually.

470
00:21:24,290 --> 00:21:27,590
Ni vigumu hasa kuona
katika nafasi hii hasa.

471
00:21:27,590 --> 00:21:34,200
>> Na jumla ya idadi ya watu
tunafikiri kuna watu hapa ni 546.

472
00:21:34,200 --> 00:21:37,330
jumla ya idadi nilikuwa mitupu
na wenzake mafundisho,

473
00:21:37,330 --> 00:21:40,660
ambaye alifanya hivyo umri
shule mwepesi njia, ilikuwa 820.

474
00:21:40,660 --> 00:21:43,660
>> [LAUGHING]

475
00:21:43,660 --> 00:21:47,170
>> [Makofi]

476
00:21:47,170 --> 00:21:48,670
>> Hiyo ni sawa.

477
00:21:48,670 --> 00:21:50,740
Basi hakika wakati huo, kuna mende haya.

478
00:21:50,740 --> 00:21:51,460
Na hiyo ni faini.

479
00:21:51,460 --> 00:21:53,810
Na hivyo kufikiri nyuma juu ya hili
mara ya kwanza kitu

480
00:21:53,810 --> 00:21:55,420
wewe kuandika siyo lazima kazi.

481
00:21:55,420 --> 00:21:57,620
Hii imetokea kwangu hapa pia.

482
00:21:57,620 --> 00:22:00,844
Lakini hebu sasa tuone jinsi sisi tupate
kuomba wazo moja huu kwa kitu

483
00:22:00,844 --> 00:22:03,760
unaweza kuwa na kuonekana kabla, ambayo
ni umri wa teknolojia hii shule here--

484
00:22:03,760 --> 00:22:05,130
kweli kubwa kitabu cha simu.

485
00:22:05,130 --> 00:22:09,380
Na kudhani kwamba kitabu hiki simu
ina kurasa 1,000 na majina 1,000

486
00:22:09,380 --> 00:22:11,360
na idadi alphabetically ndani yake.

487
00:22:11,360 --> 00:22:14,860
>> Naam, tunaweza aina ya kuomba sawa
Wazo la tatizo hili kimwili sana,

488
00:22:14,860 --> 00:22:16,270
tu kwa kutumia me.

489
00:22:16,270 --> 00:22:18,810
I just aina ya cheated
kwa leveraging nyote

490
00:22:18,810 --> 00:22:23,240
na kura na kura ya CPUs mbalimbali
au bongo utekelezaji baadhi algorithm.

491
00:22:23,240 --> 00:22:25,440
Lakini kama ni kidogo tu
umri mimi, bado anaweza

492
00:22:25,440 --> 00:22:29,630
kujiinua kwamba kiini huo wa wazo
ya kugawa na mshindi kuwa tatizo

493
00:22:29,630 --> 00:22:32,970
tena na tena, ambapo nusu ya wewe,
nusu ya wewe, nusu ya wewe, nusu ya wewe,

494
00:22:32,970 --> 00:22:35,830
kinadharia naendelea kukaa chini,
mpaka tulikuwa kushoto, kinadharia,

495
00:22:35,830 --> 00:22:36,990
na mtu mmoja tu.

496
00:22:36,990 --> 00:22:39,810
>> Hivyo katika shule hii ya zamani
technology-- hatufanyi

497
00:22:39,810 --> 00:22:43,030
haja hii map-- hii
teknolojia ya zamani shule,

498
00:22:43,030 --> 00:22:47,300
tupate kuanza kutafuta mtu
kama Mike Smith, ukurasa mmoja kwa wakati.

499
00:22:47,300 --> 00:22:49,410
Na mimi kuona kwamba hakuna, Mike si hapa.

500
00:22:49,410 --> 00:22:51,110
Mimi bado katika A sehemu.

501
00:22:51,110 --> 00:22:53,900
Hatimaye, mimi kupata
mwenyewe katika B sehemu.

502
00:22:53,900 --> 00:22:56,910
Na hii ni algorithm
hatua kwa hatua maelekezo.

503
00:22:56,910 --> 00:22:59,890
Kuanza mwanzoni na moja ukurasa
wakati, kuangalia kwa Mike Smith.

504
00:22:59,890 --> 00:23:03,410
Je, hii ni correct-- hii
algorithm au mbinu?

505
00:23:03,410 --> 00:23:04,550
>> Yeah, ni sahihi.

506
00:23:04,550 --> 00:23:06,840
Kama Mike hapa, hatimaye
Mimi itabidi kupata kwake.

507
00:23:06,840 --> 00:23:08,139
Lakini siyo ufanisi.

508
00:23:08,139 --> 00:23:09,180
Ni wazi polepole sana.

509
00:23:09,180 --> 00:23:11,340
Hivyo siwezi kujiinua
twosies huo mbinu.

510
00:23:11,340 --> 00:23:15,350
Siwezi kufanya aina ya wawili,
nne, sita, nane, 10, 12.

511
00:23:15,350 --> 00:23:16,330
Ni mara mbili kwa haraka.

512
00:23:16,330 --> 00:23:18,290
Mimi nina kwenda kupata Mike
kasi kama yeye ni huko.

513
00:23:18,290 --> 00:23:20,770
Je, ni sahihi?

514
00:23:20,770 --> 00:23:22,320
Ndiyo, lakini nikasikia hakuna little--.

515
00:23:22,320 --> 00:23:24,200
Sasa nikasikia hakuna.

516
00:23:24,200 --> 00:23:24,700
Yeah.

517
00:23:24,700 --> 00:23:26,190
Kuna mdudu uwezekano.

518
00:23:26,190 --> 00:23:29,374
Labda Mike tu ajali anapata
ipo kati ya kurasa mbili,

519
00:23:29,374 --> 00:23:31,290
kwa sababu mimi nina akiruka
huu mbili kwa wakati.

520
00:23:31,290 --> 00:23:33,580
Ili angalau tunahitaji baadhi ya
aina ya masharti fix.

521
00:23:33,580 --> 00:23:35,330
Mimi haja ya kusema, hey,
kama mimi hit mtu ambaye

522
00:23:35,330 --> 00:23:39,190
jina huanza na T badala ya S,
Mimi bora mara mbili nyuma ukurasa mmoja.

523
00:23:39,190 --> 00:23:40,767
Hivyo buggy mwanzoni, lakini fixable.

524
00:23:40,767 --> 00:23:43,850
Lakini hakuna hata mmoja wetu ni kwenda kuangalia kwa
Mike Smith kupitia 1,000 ukurasa simu

525
00:23:43,850 --> 00:23:45,290
kitabu ukurasa mmoja kwa wakati.

526
00:23:45,290 --> 00:23:48,486
Nini mtu wa kawaida kwenda kufanya?

527
00:23:48,486 --> 00:23:50,860
Wewe ni kwenda kwenda ya S,
kama alijua ambapo S ya.

528
00:23:50,860 --> 00:23:54,230
Unaweza kwenda takribani katikati
au kidogo umekiuka kuelekea mwisho.

529
00:23:54,230 --> 00:23:56,850
Na mimi kuangalia chini hapa na
Mimi niko katika M sehemu.

530
00:23:56,850 --> 00:23:58,952
Lakini je, unajua
kuhusu tatizo hili sasa,

531
00:23:58,952 --> 00:24:02,160
kwamba hatukuwa lazima kujua kabla ya
na sisi sote kuhesabu tu wenyewe

532
00:24:02,160 --> 00:24:03,030
equivalently?

533
00:24:03,030 --> 00:24:06,010
Naam, Mike ni wazi kwenda
kuwa katika nusu hii ya kitabu

534
00:24:06,010 --> 00:24:07,920
kama yeye ni hapa wakati wote kwa sababu ni yamepangwa.

535
00:24:07,920 --> 00:24:10,160
>> Na hivyo unaweza dramatically-- sana

536
00:24:10,160 --> 00:24:11,250
>> [Mitweto]

537
00:24:11,250 --> 00:24:12,300
>> Najua.

538
00:24:12,300 --> 00:24:16,940
>> [Makofi]

539
00:24:16,940 --> 00:24:19,450
>> Ni kweli kweli rahisi kama
kufanya hivyo chini ya mgongo huko.

540
00:24:19,450 --> 00:24:22,070
Lakini unaweza kisha kutupa
nusu ya tatizo mbali.

541
00:24:22,070 --> 00:24:25,950
Sasa, mimi nina kushoto na problem-- huo
kupata Mike Smith katika simu book--

542
00:24:25,950 --> 00:24:29,610
lakini sasa kitabu cha simu kuanza saa M
na huenda na Z, lakini ni nusu kama kubwa.

543
00:24:29,610 --> 00:24:30,890
>> Lakini hii ni nini kuvutia.

544
00:24:30,890 --> 00:24:34,170
Tu kama katika nadharia, nyie, wakati
nyote waliketi nusu tu wakati huo,

545
00:24:34,170 --> 00:24:37,150
Tatizo got nusu kama kubwa,
nusu kama kubwa, tena na tena.

546
00:24:37,150 --> 00:24:40,260
Hivyo ina tatizo hili kuwa
tatizo moja lakini nusu kama kubwa.

547
00:24:40,260 --> 00:24:42,670
Sasa ni tatizo 250 ukurasa.

548
00:24:42,670 --> 00:24:45,340
Haraka kama mimi kutambua, oh, mimi nina
katika T kifungu cha ajali.

549
00:24:45,340 --> 00:24:46,590
Nimekuwa wamekwenda mbali mno.

550
00:24:46,590 --> 00:24:48,500
Siwezi kutupa kwamba nusu
ya kitabu cha simu mbali.

551
00:24:48,500 --> 00:24:50,410
Sasa, mimi nina chini ya
robo ya tatizo.

552
00:24:50,410 --> 00:24:53,910
>> Na unaweza kurudia, kurudia,
kurudia mpaka, katika nadharia, uko

553
00:24:53,910 --> 00:24:55,460
kushoto na ukurasa mmoja tu.

554
00:24:55,460 --> 00:24:59,010
Na kama Mike ni juu ya ukurasa huo,
Mimi sasa wanaweza kutatua tatizo hili.

555
00:24:59,010 --> 00:25:00,810
Lakini jinsi ya haraka gani mimi kutatua hayo?

556
00:25:00,810 --> 00:25:05,420
Katika kesi ya kwanza, ilichukua mimi kama
labda hatua 1,000 kupata Mike Smith.

557
00:25:05,420 --> 00:25:09,260
Ni inaweza wamechukua ME
Mimi ilichukua kitabu cha simu

558
00:25:09,260 --> 00:25:11,440
na mimi kuanza kuangalia
ukurasa mmoja kwa wakati,

559
00:25:11,440 --> 00:25:13,480
na Mike inaweza kuwa kurasa 1,000 baadaye.

560
00:25:13,480 --> 00:25:16,020
>> njia ya pili labda
inachukua yangu hatua 500,

561
00:25:16,020 --> 00:25:17,960
kwa sababu mimi nina kuruka
kupitia mbili kwa wakati.

562
00:25:17,960 --> 00:25:21,082
Na njia ya tatu ingawa,
ni nguvu hasa.

563
00:25:21,082 --> 00:25:23,790
Lakini hebu fikiria nini sisi kweli
alivyofanya kwa mbinu hii ya tatu.

564
00:25:23,790 --> 00:25:27,590
Mimi itabidi nini mimi itabidi kuwaita hawa tu
kauli hapa, moja kwa wakati mmoja.

565
00:25:27,590 --> 00:25:28,560
Pick up kitabu cha simu.

566
00:25:28,560 --> 00:25:30,130
Fungua katikati ya kitabu cha simu.

567
00:25:30,130 --> 00:25:31,419
Angalia katika majina.

568
00:25:31,419 --> 00:25:33,960
Na kisha mambo kupata kidogo
zaidi kielimu ya kuvutia,

569
00:25:33,960 --> 00:25:35,170
kama bado rahisi.

570
00:25:35,170 --> 00:25:38,350
Kama Smith ni miongoni mwa
majina ya kwamba ukurasa wa sasa,

571
00:25:38,350 --> 00:25:40,170
kisha kufanya kitu kwa masharti.

572
00:25:40,170 --> 00:25:41,840
Ni kama uma katika barabara.

573
00:25:41,840 --> 00:25:42,660
Wito Mike.

574
00:25:42,660 --> 00:25:44,930
Kama Mike ni miongoni mwa majina
katika ukurasa huo, alimwita Mike.

575
00:25:44,930 --> 00:25:49,720
Lakini tu kufanya mstari nne ikiwa line
mti, kama wewe, ni kweli.

576
00:25:49,720 --> 00:25:51,590
jibu la swali hilo ni ndiyo.

577
00:25:51,590 --> 00:25:55,520
>> Mwingine kama Smith ni mapema katika book--
kwa maneno mengine, kama mimi nina katika M kifungu cha

578
00:25:55,520 --> 00:25:58,540
na mimi nina kuangalia kwa mtu
kushoto, kisha kile lazima kufanya

579
00:25:58,540 --> 00:26:00,300
ni kitu sawa sana.

580
00:26:00,300 --> 00:26:03,440
Kisha mimi inapaswa kufungua katikati
ya nusu ya kushoto ya kitabu.

581
00:26:03,440 --> 00:26:07,930
Hivyo kwenda kushoto, na kisha
kwenda nyuma ya hatua mbili.

582
00:26:07,930 --> 00:26:09,290
Angalia majina huko.

583
00:26:09,290 --> 00:26:12,779
>> Hivyo kwa maneno mengine, kufanya kitu kimoja,
lakini juu ya tatizo kwamba imekuwa nusu.

584
00:26:12,779 --> 00:26:13,570
Unajua nini kingine?

585
00:26:13,570 --> 00:26:16,470
Kama Smith ni baadaye katika kitabu
msingi ukurasa mimi nina kuangalia,

586
00:26:16,470 --> 00:26:18,790
wazi katikati ya
nusu haki ya kitabu

587
00:26:18,790 --> 00:26:22,050
na kisha kwenda nyuma tena
hatua mbili, else--

588
00:26:22,050 --> 00:26:24,000
kuna uwezekano wa nne hapa.

589
00:26:24,000 --> 00:26:28,830
Mike aidha hapa, au wa kushoto
au kulia au si huko.

590
00:26:28,830 --> 00:26:30,570
Na hapa sisi bora kuzingatia hili.

591
00:26:30,570 --> 00:26:33,360
Na kwa kweli, kama wameweza milele alikuwa
kompyuta yako tu ajali juu yenu,

592
00:26:33,360 --> 00:26:36,822
kwamba ni wakati mwingine, lakini si mara zote,
matokeo ya tu programu binadamu si

593
00:26:36,822 --> 00:26:39,280
kutambua, oh risasi, kuna
kweli hali hii ya nne.

594
00:26:39,280 --> 00:26:41,650
Na kama huna kuandika kanuni
kushughulikia kwamba mazingira,

595
00:26:41,650 --> 00:26:43,220
wakati mwingine wewe sijui
nini kompyuta anaweza kufanya.

596
00:26:43,220 --> 00:26:44,770
Na hakika mpango inaweza kukwama.

597
00:26:44,770 --> 00:26:47,550
>> Lakini katika kesi hii, nilifikiri
kuhusu hilo, na mimi alisema, mwingine kujiondoa,

598
00:26:47,550 --> 00:26:49,850
kwa sababu hiyo ni ya nne
mantiki iwezekanavyo scenario.

599
00:26:49,850 --> 00:26:51,950
Sasa, hebu tu kuongeza
baadhi msamiati hivyo sisi

600
00:26:51,950 --> 00:26:55,320
Unaweza kuanza kwa toss karibu suala kwamba
ni vinginevyo pretty Intuitive.

601
00:26:55,320 --> 00:26:57,870
Mambo yote nimekuwa tu
yalionyesha katika njano hapa,

602
00:26:57,870 --> 00:27:00,140
Mimi tu kwenda kwa
kazi au taratibu.

603
00:27:00,140 --> 00:27:01,590
Wao ni aina tu ya vitendo.

604
00:27:01,590 --> 00:27:04,900
Hivyo kuchukua sheria, wazi kwa, kuangalia
katika, piga, wazi, wazi,

605
00:27:04,900 --> 00:27:09,170
quit-- hizi ni hatua tu, au tutaweza
kuwaita zaidi rasmi, kazi.

606
00:27:09,170 --> 00:27:11,410
>> Wakati huo huo, sasa katika njano,
Nimekuwa yalionyesha mambo

607
00:27:11,410 --> 00:27:14,084
that-- hebu tu kuanza wito
yao hali au matawi.

608
00:27:14,084 --> 00:27:16,750
Hizi ni pointi uamuzi ambapo
unaweza kwenda kwa njia hii, kwa njia hii,

609
00:27:16,750 --> 00:27:18,100
au baadhi ya upande mwingine bado.

610
00:27:18,100 --> 00:27:19,430
Hivyo wale itakuwa masharti.

611
00:27:19,430 --> 00:27:20,930
Na sasa hii moja kidogo fancier.

612
00:27:20,930 --> 00:27:24,600
Hebu piga maswali haya
Maneno Boolean,

613
00:27:24,600 --> 00:27:26,530
baada ya mtu na jina la mwisho Bool.

614
00:27:26,530 --> 00:27:28,340
>> Na kujieleza Boolean
kitu tu

615
00:27:28,340 --> 00:27:30,290
hiyo ni ama kweli au uongo, ndiyo au hapana.

616
00:27:30,290 --> 00:27:35,870
Hivyo ni swali ambao jibu wewe
huduma ya juu, ili katika hali

617
00:27:35,870 --> 00:27:39,210
kufanya decision-- kupata nyuma jibu,
na kisha kwenda kushoto au kulia, au kitu

618
00:27:39,210 --> 00:27:40,450
kingine kabisa.

619
00:27:40,450 --> 00:27:42,860
>> Na kisha mwisho, hizi
mistari here-- kurejea

620
00:27:42,860 --> 00:27:44,737
hatua mbili, kurudi nyuma
hatua two-- tunaweza

621
00:27:44,737 --> 00:27:46,320
kutekeleza wazo hili kwa njia tofauti.

622
00:27:46,320 --> 00:27:49,028
Na kisha wale wa wewe kwa
programu uzoefu anaweza kuwa amefanya

623
00:27:49,028 --> 00:27:50,670
au anaweza kufikiria kufanya hili kwa njia tofauti.

624
00:27:50,670 --> 00:27:53,170
Lakini kwa madhumuni ya leo, ni
wazo tu kwamba mambo.

625
00:27:53,170 --> 00:27:55,400
Hii ni inducing nini
tutaweza ujumla kuwaita

626
00:27:55,400 --> 00:28:00,110
a loop-- aina fulani ya mzunguko, kwa sababu
ni maamuzi yangu kufanya kitu tena.

627
00:28:00,110 --> 00:28:03,340
>> Hivyo sasa, hebu tu kufikiria
jinsi nzuri algorithm hii ni.

628
00:28:03,340 --> 00:28:03,899
Ni sahihi.

629
00:28:03,899 --> 00:28:06,940
Kama Mike katika kitabu, ni moja ya
hizo nne scenarios-- tena na tena

630
00:28:06,940 --> 00:28:08,023
na tena, tutaweza kumpata.

631
00:28:08,023 --> 00:28:08,890
Lakini jinsi nzuri ni nini?

632
00:28:08,890 --> 00:28:10,150
Naam, hatuna
kuwa pia rasmi hapa.

633
00:28:10,150 --> 00:28:12,066
Lakini hebu tu njama
kitu, x na y, kupata

634
00:28:12,066 --> 00:28:14,470
hisia ya sura ya tatizo hili.

635
00:28:14,470 --> 00:28:17,160
>> On x-mhimili hapa ni
ukubwa wa tatizo langu.

636
00:28:17,160 --> 00:28:20,256
Nao y-mhimili hapa
itakuwa ni mara ya kutatua.

637
00:28:20,256 --> 00:28:21,630
Hivyo labda hii ni idadi ya kurasa.

638
00:28:21,630 --> 00:28:24,400
Labda hii ni sekunde au
ukurasa turns-- chochote.

639
00:28:24,400 --> 00:28:27,290
Hata hivyo unataka kuhesabu ni
nini picha hii itakuwa kuwakilisha.

640
00:28:27,290 --> 00:28:30,630
Na kwamba algorithm kwanza, mimi nina kwenda
kuelezea kama tu mstari sawa.

641
00:28:30,630 --> 00:28:33,120
Kama kuna kurasa n katika
kitabu cha simu, basi ni

642
00:28:33,120 --> 00:28:36,010
inaweza kuchukua mimi kama wengi
kama hatua n kupata Mike.

643
00:28:36,010 --> 00:28:38,930
Kama Verizon au kampuni ya simu
anaongeza zaidi ukurasa mmoja mwaka ujao,

644
00:28:38,930 --> 00:28:42,170
inaweza kuchukua yangu mmoja zaidi step--
moja zaidi kitengo cha muda wa kupata Mike.

645
00:28:42,170 --> 00:28:44,230
Hivyo kuna tu hii moja kwa uwiano moja.

646
00:28:44,230 --> 00:28:45,970
Ni moja kwa moja line mteremko.

647
00:28:45,970 --> 00:28:49,110
>> Wakati huo huo, kwamba pili
algorithm kama mimi nina

648
00:28:49,110 --> 00:28:51,570
kwenda mbili katika time-- mbili,
nne, sita, nane, au double--

649
00:28:51,570 --> 00:28:54,550
kwenda kupitia kurasa mara mbili
wakati huo, mbili kwa wakati,

650
00:28:54,550 --> 00:28:55,710
bado ni moja kwa moja line.

651
00:28:55,710 --> 00:28:58,720
Sasa kuna 01:59
uwiano, lakini kidogo tu chini.

652
00:28:58,720 --> 00:29:02,240
Hivyo kama kuna hii kurasa nyingi
kwenye chati hapa katika njano,

653
00:29:02,240 --> 00:29:04,800
ambayo inaweza kuchukua mimi hii
hatua nyingi au sekunde,

654
00:29:04,800 --> 00:29:07,980
vinginevyo ni kwenda kuchukua yangu
mara mbili kama wengi juu ya mstari mwekundu.

655
00:29:07,980 --> 00:29:10,190
>> Lakini line kijani ni takeaway kweli.

656
00:29:10,190 --> 00:29:12,290
Hii ni nini sisi ujumla
kuwaita logi logorithm--

657
00:29:12,290 --> 00:29:13,840
ya n, ambapo n ni idadi ya kurasa.

658
00:29:13,840 --> 00:29:16,450
Lakini ni sura kwamba mambo
leo, kwa sababu hatuna

659
00:29:16,450 --> 00:29:17,950
na hata kufikiri juu kupanga njama pointi.

660
00:29:17,950 --> 00:29:19,830
>> Fikiria juu ya mazingira uliokithiri.

661
00:29:19,830 --> 00:29:23,070
Tuseme Verizon kesho maradufu
idadi ya kurasa katika kwamba kitabu cha simu,

662
00:29:23,070 --> 00:29:24,900
1,000 hadi 2,000.

663
00:29:24,900 --> 00:29:28,440
Katika algorithm kwanza, mimi
inaweza kupoteza ziada 1,000

664
00:29:28,440 --> 00:29:32,080
hatua kuangalia kwa Mike, kwa sababu tu
Verizon mara mbili ya ukubwa wa kitabu.

665
00:29:32,080 --> 00:29:34,740
pili algorithm ni nguvu
kuchukua yangu ya ziada hatua 500.

666
00:29:34,740 --> 00:29:38,370
1,000 kurasa zaidi, mimi kwenda mbili katika
time-- hatua 500 zaidi kupata Mike.

667
00:29:38,370 --> 00:29:41,020
>> Lakini hiyo algorithm tatu
ni aina ya kichawi.

668
00:29:41,020 --> 00:29:44,270
Verizon maradufu idadi
ya kurasa kutoka 1,000 hadi 2,000,

669
00:29:44,270 --> 00:29:47,730
lakini wangapi hatua zaidi anafanya
ni kuchukua yangu kwa kuangalia Mike?

670
00:29:47,730 --> 00:29:51,220
Ni moja tu, kwa sababu naweza tu
machozi kitabu cha simu mara moja zaidi

671
00:29:51,220 --> 00:29:55,280
kutokana na tatizo 2,000 ukurasa wa
1,000 tatizo ukurasa, na voilà.

672
00:29:55,280 --> 00:29:57,030
Nimekuwa kuchukuliwa kuumwa mkubwa nje ya hiyo.

673
00:29:57,030 --> 00:29:59,405
>> Na kama wewe kwenda kweli uliokithiri,
tuseme kwamba kitabu cha simu

674
00:29:59,405 --> 00:30:03,600
kampuni alikuwa kitu mambo kama
bilioni 4 ukurasa kitabu cha simu.

675
00:30:03,600 --> 00:30:07,020
Naam jinsi hatua nyingi inaweza kuchukua
kupata Mike Smith katika bilioni 4

676
00:30:07,020 --> 00:30:09,990
ukurasa simu kitabu?

677
00:30:09,990 --> 00:30:16,450
Ni idadi kubwa, lakini 4 tu bilioni kwa
bilioni 2 bilioni 1 kwa milioni 500,

678
00:30:16,450 --> 00:30:18,720
250 million-- bado
Inaonekana kama idadi kubwa,

679
00:30:18,720 --> 00:30:20,980
lakini nina haraka sana
kupata maadili ndogo.

680
00:30:20,980 --> 00:30:24,790
>> Na kwa kweli, kama mimi kufanya math
haki, siwezi tu kugawanya bilioni 4

681
00:30:24,790 --> 00:30:28,750
na takribani mara 32 kabla
Mimi kupata chini ya moja tu.

682
00:30:28,750 --> 00:30:31,640
Hivyo kama kwamba kitabu cha simu na 4
bilioni kurasa muda mrefu, hakuna mpango mkubwa.

683
00:30:31,640 --> 00:30:35,270
Ndani ya sekunde chache, labda 32
sekunde, mimi naweza kuigawanya katika nusu

684
00:30:35,270 --> 00:30:39,560
na hatimaye kupata Mike au
kuhitimisha kwamba yeye si huko.

685
00:30:39,560 --> 00:30:42,219
Na kwamba ni kiini cha
algorithm algorithm nzuri.

686
00:30:42,219 --> 00:30:44,260
Na kwamba ni moja ya
malengo ya darasa kama hii,

687
00:30:44,260 --> 00:30:47,350
ni kujaribu kufikiri jinsi gani mimi
kutatua tatizo si tu kwa usahihi,

688
00:30:47,350 --> 00:30:52,360
kama mimi siku zote alijua jinsi ya kufanya hivyo moja
ukurasa katika time-- lakini kwa usahihi na vizuri.

689
00:30:52,360 --> 00:30:55,034
Je, mimi kubuni nzuri
ufumbuzi wa matatizo?

690
00:30:55,034 --> 00:30:57,200
Hivyo hebu kuchukua muda hapa
na kukupa hisia sasa

691
00:30:57,200 --> 00:31:00,260
ya CS50 Bila shaka itself-- kuanzisha
wafanyakazi wanachama wachache kozi.

692
00:31:00,260 --> 00:31:02,010
Muda mfupi kabla ya 2:00, tutaweza
kuchukua mapumziko mafupi

693
00:31:02,010 --> 00:31:03,520
ili wale
ambao ni ununuzi unaweza

694
00:31:03,520 --> 00:31:05,130
bata nje na kuchukua
tuangalie baadhi ya darasa nyingine

695
00:31:05,130 --> 00:31:06,580
na kuangalia wengine wa online hii.

696
00:31:06,580 --> 00:31:09,250
Lakini kwa sasa, napenda kuanzisha
CS50, darasa lenyewe,

697
00:31:09,250 --> 00:31:11,330
na hasa nini ni mpya.

698
00:31:11,330 --> 00:31:13,960
>> Hivyo siku za nyuma spring, sisi
alitumia kidogo kabisa ya time--

699
00:31:13,960 --> 00:31:17,911
wafanyakazi kozi na I-- kufikiri
juu yake ni nini tunataka CS50 kuwa,

700
00:31:17,911 --> 00:31:19,910
na kurejea kwanza
kanuni, hivyo kusema,

701
00:31:19,910 --> 00:31:22,760
kufikiria ni nini tunataka
Bila shaka hii kuangalia kama na kuwa na

702
00:31:22,760 --> 00:31:23,740
kama kwa wanafunzi wake.

703
00:31:23,740 --> 00:31:26,480
Na hivyo utaona katika tatizo
kuweka zero pia, mwaliko

704
00:31:26,480 --> 00:31:28,780
kuangalia kwamba
URL ambayo inatoa muhtasari wa

705
00:31:28,780 --> 00:31:33,270
baadhi ya motisha nyuma
kufuatia tabia ya kuanguka 2016.

706
00:31:33,270 --> 00:31:35,570
>> Hivyo kama unaweza kuwa zilizopatikana
kutoka TL: DR kitini,

707
00:31:35,570 --> 00:31:39,060
mtaala leo kama vile kutoka
Bila shaka catalog, mwaka huu katika CS50,

708
00:31:39,060 --> 00:31:42,540
wewe tu wanatarajiwa kuhudhuria
today-- hivyo kazi vizuri done--

709
00:31:42,540 --> 00:31:45,960
na hotuba ya mwisho juu ya Novemba 21.

710
00:31:45,960 --> 00:31:49,150
Na wewe ni kuwakaribisha lakini si inatarajiwa
kuhudhuria mihadhara wale katikati,

711
00:31:49,150 --> 00:31:51,180
kwa sababu nini sisi ni kufanya
mwaka huu, ni risasi

712
00:31:51,180 --> 00:31:52,661
katika muda halisi utbildningsmaterial ya.

713
00:31:52,661 --> 00:31:54,660
Kwa hiyo kila kitu kukaa
sasa na kuingizwa

714
00:31:54,660 --> 00:31:57,410
kama bora sisi can-- matukio ya sasa
na mazungumzo ambayo folks wapate

715
00:31:57,410 --> 00:32:00,400
kuwa kuwa katika sekta katika
dunia, lakini maamuzi vifaa kwamba

716
00:32:00,400 --> 00:32:03,892
inapatikana, matokeo yake, hata earlier--
kamili na nakala kamili Nakala

717
00:32:03,892 --> 00:32:05,850
na searchability na
viungo kwa rasilimali nyingine.

718
00:32:05,850 --> 00:32:07,930
>> Na hakika, tumekuwa
wakidai kwa muda fulani

719
00:32:07,930 --> 00:32:10,830
na hatuna sasa kuamini hili,
tuweze kujenga, digital,

720
00:32:10,830 --> 00:32:15,170
zaidi immersive, zaidi ya kulazimisha
uzoefu wa elimu, kinyume

721
00:32:15,170 --> 00:32:19,110
kwa kukusanya hapa baadhi 23 mara
katika mtu, kusikia mtu kama mimi

722
00:32:19,110 --> 00:32:22,925
tu majadiliano juu ya sayansi ya kompyuta,
kinyume na kujihusisha kikamilifu zaidi.

723
00:32:22,925 --> 00:32:25,800
Hivyo utaona katika mtaala wa kozi
mchoro wa muhula hapa,

724
00:32:25,800 --> 00:32:27,840
pamoja na wakati mihadhara mapenzi
kuwa zingine, ambayo uko

725
00:32:27,840 --> 00:32:29,710
kuwakaribisha lakini si ilivyotarajiwa,
na wakati wao

726
00:32:29,710 --> 00:32:31,640
kutolewa kwenye tovuti kozi ya.

727
00:32:31,640 --> 00:32:34,300
>> Na nini tutaweza kufanya hapa
Jumatano kuanzia wiki ijayo,

728
00:32:34,300 --> 00:32:37,362
ni mengi kwa undani zaidi, na tu
wale folks ambao wanataka kushiriki,

729
00:32:37,362 --> 00:32:39,820
ni kinachojulikana kutembea kwa njia ya,
ambapo mimi na vichwa kozi ya

730
00:32:39,820 --> 00:32:41,730
kwa kweli kufanya mambo
kidogo ionekane zaidi

731
00:32:41,730 --> 00:32:44,313
chini hapa katika orchestra
sehemu, bado wana baadhi ya teknolojia

732
00:32:44,313 --> 00:32:46,365
na kutembea kwa njia ya
Tatizo wiki sasa ya kuweka,

733
00:32:46,365 --> 00:32:50,020
na kutoa particularly-- kama miongoni mwa
walio chini comfortable-- wote zaidi

734
00:32:50,020 --> 00:32:52,790
mwongozo kwamba unaweza kutaka au
haja kwa changamoto wiki.

735
00:32:52,790 --> 00:32:55,820
Na vile vile, kwa wale ambao hawawezi
kuhudhuria wale katika mtu, hakuna mpango mkubwa.

736
00:32:55,820 --> 00:32:58,486
Kutakuwa na vile vile wakiongozwa na
mmoja wa wafanyakazi waandamizi kozi ya,

737
00:32:58,486 --> 00:33:02,650
Zamalya, fursa sawa iliyoingia
katika tatizo seti wenyewe.

738
00:33:02,650 --> 00:33:04,960
>> Tatizo seti mwaka huu
itakuwa iliyotolewa siku ya Ijumaa

739
00:33:04,960 --> 00:33:08,080
na tena kufanya siku saba baadaye,
lakini siku 10 later-- kwa makusudi

740
00:33:08,080 --> 00:33:10,910
ukipishana na kila tatizo
kuweka, ili bora ya malazi,

741
00:33:10,910 --> 00:33:13,050
ni matumaini yetu, pwa na mtiririko
katika ratiba ya mwanafunzi,

742
00:33:13,050 --> 00:33:16,550
hasa wakati midterms au riadha
au wasomi au extracurriculars

743
00:33:16,550 --> 00:33:18,465
huwa na kuja na kwenda
hasa katikati ya muhula.

744
00:33:18,465 --> 00:33:21,340
Kwamba lazima kukupa zaidi kidogo
busara ya kama wewe mbele

745
00:33:21,340 --> 00:33:25,690
shehena wiki yako na CS50 au nyuma mzigo
juu ya mwishoni mwa wiki kufuatia badala yake.

746
00:33:25,690 --> 00:33:28,817
Ili kuangalia kwa mtaala wa kozi
hapa kwa ratiba yake.

747
00:33:28,817 --> 00:33:30,900
Na wewe utakuwa taarifa mno miongoni mwa
mabadiliko mwaka huu,

748
00:33:30,900 --> 00:33:34,082
kwa wale zaidi ya ukoo na
programu katika siku za nyuma,

749
00:33:34,082 --> 00:33:36,290
tutaweza kuanza muhula kama
sisi leo katika Scratch,

750
00:33:36,290 --> 00:33:39,730
kuzingatia hasa juu ya lugha
aitwaye C, na kisha mpito si

751
00:33:39,730 --> 00:33:43,430
kwa PHP, lakini kwa lugha inayoitwa
Python kuelekea mwisho wa muhula

752
00:33:43,430 --> 00:33:46,565
katika mazingira ya programu ya mtandao,
pamoja na SQL na JavaScript,

753
00:33:46,565 --> 00:33:48,930
HTML, CSS, na bado zaidi.

754
00:33:48,930 --> 00:33:51,790
>> Na katika jibu la Maswali,
ni kweli kesi

755
00:33:51,790 --> 00:33:55,520
kwamba CS ni si kama inatisha kama mimi mara moja
walidhani ilikuwa, lakini ni kama kazi kubwa

756
00:33:55,520 --> 00:33:57,280
kama mimi alikuwa amesikia inaweza kuwa.

757
00:33:57,280 --> 00:34:03,210
Lakini hii ni kusema kwamba hapa ni baadhi ya
takwimu kutoka kuanguka 2015 mwanafunzi mwili,

758
00:34:03,210 --> 00:34:06,460
ambapo usawa mistari ya bluu
kuwakilisha wastani wa idadi ya masaa

759
00:34:06,460 --> 00:34:06,960
taarifa.

760
00:34:06,960 --> 00:34:10,570
Na utaona wastani wa
sita hadi 10 kwa 12-- labda 16

761
00:34:10,570 --> 00:34:14,580
au hivyo na kadhalika, lakini pamoja na
high ugomvi kuwa wazi.

762
00:34:14,580 --> 00:34:18,570
Na hivyo kutambua kwamba kuna si tu
wanafunzi vizuri zaidi na chini

763
00:34:18,570 --> 00:34:22,150
vizuri katika shaka,
lakini msaada sambamba

764
00:34:22,150 --> 00:34:25,699
muundo wa kupata wanafunzi hao
kupitia muhula mafanikio.

765
00:34:25,699 --> 00:34:29,409
>> Hakika, katika jibu la FAQ, lazima
wewe kuchukua CS50 kama mwaka wa kwanza?

766
00:34:29,409 --> 00:34:30,139
Kabisa.

767
00:34:30,139 --> 00:34:32,690
Na kwa kweli, sijui ni majuto
wasiukute njia yangu

768
00:34:32,690 --> 00:34:35,170
au kupatikana uwanja mpya
kwamba mwaka wa kwanza pia.

769
00:34:35,170 --> 00:34:39,149
Na lazima wewe kuchukua CS50 na
kozi nyingine, hakika kama well--

770
00:34:39,149 --> 00:34:41,940
na ushauri kwa ujumla tupate
kutoa wanafunzi, kwamba CS50 pengine

771
00:34:41,940 --> 00:34:44,929
si aina ya darasa au intro darasa
kwamba unapaswa kuchukua na tatu

772
00:34:44,929 --> 00:34:47,199
nyingine au madarasa mengine p-kuweka nne.

773
00:34:47,199 --> 00:34:50,583
Lakini kama wewe ni kuchukua wengine wawili p-seti
madarasa, kitu kingine, na CS50,

774
00:34:50,583 --> 00:34:51,499
manageable kabisa.

775
00:34:51,499 --> 00:34:54,900
Nimepata wanafunzi wengi katika
zamani wamefanya hivyo kabisa kwa mafanikio.

776
00:34:54,900 --> 00:34:57,490
>> Na kupata wewe kuelekea kuwa
kumaliza line mafanikio,

777
00:34:57,490 --> 00:35:00,260
haina shaka kuwa sections--
nyimbo tofauti kwa wanafunzi

778
00:35:00,260 --> 00:35:03,100
chini ya starehe, vizuri zaidi,
na mahali fulani katika kati,

779
00:35:03,100 --> 00:35:04,850
ambapo katika kozi ya
Tatizo la kwanza kuweka,

780
00:35:04,850 --> 00:35:06,360
itabidi kuulizwa kuelezea wewe mwenyewe.

781
00:35:06,360 --> 00:35:09,151
Na kama wewe ni miongoni mwa walio chini
starehe, ni aina ya kitu

782
00:35:09,151 --> 00:35:10,420
kwamba wewe tu badala kujua.

783
00:35:10,420 --> 00:35:13,010
Na hakika, kwamba imekuwa
kuongezeka idadi ya watu katika CS50

784
00:35:13,010 --> 00:35:14,090
kwa miaka chache kabisa.

785
00:35:14,090 --> 00:35:17,680
>> Kama ya mwisho kuanguka kwa
mfano, 58% ya darasa

786
00:35:17,680 --> 00:35:20,560
ilivyoelezwa wenyewe kama
miongoni mwa wale chini ya starehe,

787
00:35:20,560 --> 00:35:23,210
na 9% kati ya wale zaidi
starehe, na kisha

788
00:35:23,210 --> 00:35:25,900
wanafunzi wengine huko katika
nyekundu kuelezea wenyewe

789
00:35:25,900 --> 00:35:27,890
kama mahali fulani katika kati.

790
00:35:27,890 --> 00:35:31,980
Na utaona hapa mada kwa ujumla
na ratiba ya sehemu, ambayo yote

791
00:35:31,980 --> 00:35:34,820
zinazotolewa katika mtu, katika
muda halisi, na bila shaka ya

792
00:35:34,820 --> 00:35:38,320
wafanyakazi wa ajabu wa wenzake mafundisho
na bila shaka wasaidizi, ambao baadhi yao

793
00:35:38,320 --> 00:35:39,660
utasikia kukutana katika muda tu.

794
00:35:39,660 --> 00:35:42,993
>> Sehemu wenyewe, kama utaona, mapenzi
kuwa Jumatatu na Jumanne na Jumatano,

795
00:35:42,993 --> 00:35:45,910
ili kuruhusu wewe kupiga mbizi
katika baada ya kujihusisha, kama hivyo

796
00:35:45,910 --> 00:35:48,110
kuchagua, katika kozi ya
hotuba ya awali kwamba wiki.

797
00:35:48,110 --> 00:35:51,420
Na kisha masaa ya ofisi, ambayo
hakika, kwa kila mwaka kupita,

798
00:35:51,420 --> 00:35:54,110
wamekuwa si chini ya
changamoto kwa ajili ya kozi.

799
00:35:54,110 --> 00:35:57,040
Na mwaka huu, sisi ni mipango si
tu kushika madaraka hours-- moja

800
00:35:57,040 --> 00:36:00,300
juu ya fursa moja kwa ajili ya kusaidia kwa
wanafunzi juu ya Jumatano Alhamisi

801
00:36:00,300 --> 00:36:03,790
na Jumapili, wa mwisho wao hao
kuwa katika mchana na kubuni

802
00:36:03,790 --> 00:36:06,910
kupunguza baadhi ya dhiki kwamba
invariably inatokana na usiku wa marehemu

803
00:36:06,910 --> 00:36:10,180
p-settting na tarehe ya mwisho looming--
lakini masaa ya ofisi pia kutolewa

804
00:36:10,180 --> 00:36:14,920
juu ya Jumatatu na Jumanne na
Jumatano, na Ijumaa na Jumamosi,

805
00:36:14,920 --> 00:36:17,080
shukrani kwa marafiki zetu katika HSA.

806
00:36:17,080 --> 00:36:20,330
>> CS50 sasa ina nafasi yake mwenyewe
kwa wanafunzi na wafanyakazi CS50,

807
00:36:20,330 --> 00:36:23,070
atop 67 Mount Auburn Street,
haki pale katika Harvard Square.

808
00:36:23,070 --> 00:36:26,340
maono kwa ajili ya ambayo ni kwamba CS50 ya
TFS na CAS wiki nzima,

809
00:36:26,340 --> 00:36:29,052
pretty much katika zaidi
siku, atakuwa huko kwa msaada.

810
00:36:29,052 --> 00:36:30,760
Hivyo kama wewe nimepata baadhi
swali juu ya p-seti

811
00:36:30,760 --> 00:36:33,093
au wewe ni hisia kidogo
imefungwa au kuchanganyikiwa kidogo,

812
00:36:33,093 --> 00:36:35,640
na heck, nimepata saa moja au
nusu saa kati ya madarasa,

813
00:36:35,640 --> 00:36:38,920
hasa katika square-- unaweza
pop katika na kuwa na swali kwamba akajibu

814
00:36:38,920 --> 00:36:41,720
ya kuwa na kwamba mkanganyiko clarified--
sana katika roho,

815
00:36:41,720 --> 00:36:45,490
wewe ni ukoo, wa hisabati
idara ya mwenyewe maswali math katikati,

816
00:36:45,490 --> 00:36:49,300
lakini pretty much kote saa per
[? Gcal?] Kwamba sisi baada online.

817
00:36:49,300 --> 00:36:52,400
>> Tutoring pia ni inapatikana kwa wale
wanafunzi, uhuru kutoka kozi ya

818
00:36:52,400 --> 00:36:54,750
wafanyakazi wenyewe kama ungependa
ionekane zaidi moja kwa moja,

819
00:36:54,750 --> 00:36:58,940
au mbili au tatu wanafunzi tu, kufanya kazi
na mmoja wa wafanyakazi kozi.

820
00:36:58,940 --> 00:37:02,320
Na hakika, hizi hapa ni baadhi tu ya
baadhi ya wafanyakazi kozi ya,

821
00:37:02,320 --> 00:37:04,120
chache ambao utasikia
kukutana katika muda tu.

822
00:37:04,120 --> 00:37:07,440
Kwa kweli, CS50 ya mwenyewe
kichwa mafundisho wenzake,

823
00:37:07,440 --> 00:37:09,790
na bila shaka kichwa
msaidizi, na preceptor,

824
00:37:09,790 --> 00:37:12,998
inaweza kuja juu juu, kuruhusu
wao kusema hello.

825
00:37:12,998 --> 00:37:22,498
>> [Makofi]

826
00:37:22,498 --> 00:37:23,456
SPIKA 1: [inaudible].

827
00:37:23,456 --> 00:37:51,842

828
00:37:51,842 --> 00:37:57,856
>> [Makofi]

829
00:37:57,856 --> 00:37:58,814
SPIKA 2: [inaudible].

830
00:37:58,814 --> 00:38:17,240

831
00:38:17,240 --> 00:38:27,238
>> [Makofi]

832
00:38:27,238 --> 00:38:28,196
SPIKA 3: [inaudible].

833
00:38:28,196 --> 00:38:58,951

834
00:38:58,951 --> 00:39:03,120
>> [Makofi]

835
00:39:03,120 --> 00:39:06,740
>> DAVID Malan: Na kuruhusu sisi
kuleta kwenye ubao wawili wa CS50 ya zaidi

836
00:39:06,740 --> 00:39:09,730
wafanyakazi waandamizi, Rob na Zamayla vilevile.

837
00:39:09,730 --> 00:39:15,120
>> [Makofi]

838
00:39:15,120 --> 00:39:17,226
>> Hakika, wote Rob na
Zamayla wamekuwa na sisi

839
00:39:17,226 --> 00:39:19,940
kwa muda mrefu, kwamba nilikuwa na uwezo
kwenda kwenye kumbukumbu CS50

840
00:39:19,940 --> 00:39:22,470
na kupata hii SD sana
Footage wao wanaoshiriki

841
00:39:22,470 --> 00:39:25,402
juu ya hatua wenyewe baadhi ya miaka iliyopita.

842
00:39:25,402 --> 00:39:26,110
Rob: [inaudible].

843
00:39:26,110 --> 00:39:53,660

844
00:39:53,660 --> 00:39:59,247
>> [Makofi]

845
00:39:59,247 --> 00:40:00,080
ZAMAYLA: [inaudible]

846
00:40:00,080 --> 00:40:50,888

847
00:40:50,888 --> 00:40:52,467
>> [Makofi]

848
00:40:52,467 --> 00:40:53,425
DAVID Malan: Asante.

849
00:40:53,425 --> 00:40:56,160

850
00:40:56,160 --> 00:40:58,030
Hivyo katika Mbali na hayo
wanachama wa timu hapa,

851
00:40:58,030 --> 00:41:01,662
CS50 ina timu ya karibu 100
wafanyakazi, ambao wote

852
00:41:01,662 --> 00:41:04,370
itakuwa inapatikana kwa sehemu
na masaa ya ofisi na hivyo zaidi.

853
00:41:04,370 --> 00:41:06,920
Na kama Rob anasema pia, hii ni
kubadilisha muhimu zaidi

854
00:41:06,920 --> 00:41:09,534
ya CS50 katika miaka 10 kwamba
Nimekuwa katika [inaudible].

855
00:41:09,534 --> 00:41:12,200
[Inaudible] ililenga hasa
katika kutoa muundo msaada,

856
00:41:12,200 --> 00:41:14,050
trimming mbali mengi ya
wingi kwamba imekuwa

857
00:41:14,050 --> 00:41:16,870
yaliyopatikana katika miaka 10
maendeleo ya iterative

858
00:41:16,870 --> 00:41:18,120
juu ya seti tatizo kozi.

859
00:41:18,120 --> 00:41:21,470
>> Hivyo mwaka huu, si tu katika darasa lakini
pia katika mfumo wa tatizo kozi ya

860
00:41:21,470 --> 00:41:24,800
seti, unapaswa kupata mambo ya
kuwa zaidi harmoniserad, trimmer, kiasi

861
00:41:24,800 --> 00:41:26,700
manageable zaidi ya
katika miaka ya nyuma, kama sisi

862
00:41:26,700 --> 00:41:31,330
kumwaga baadhi ya mizigo hiyo ni
zilizotengenezwa na asili ya kutoa mwaka

863
00:41:31,330 --> 00:41:32,970
baada ya mwaka na iterating.

864
00:41:32,970 --> 00:41:35,110
Hivyo mpya na kuboresha inaanza leo.

865
00:41:35,110 --> 00:41:37,860
>> Utasikia kukutana baadhi ya zaidi ya
wafanyakazi kozi ya nje katika [inaudible]

866
00:41:37,860 --> 00:41:40,186
saa 2:30, ambapo sisi kutumika,
kama mila, keki.

867
00:41:40,186 --> 00:41:42,060
Kuna keki kidogo zaidi
zaidi ya kwamba, lakini utasikia

868
00:41:42,060 --> 00:41:44,690
kukutana Erin na Tobias na wengine bado.

869
00:41:44,690 --> 00:41:46,470
Na nikupe
ziara kabla tunasikia

870
00:41:46,470 --> 00:41:49,600
kutoka kwa baadhi ya wanachama wengine wa wafanyakazi
darasani, ya nini watapata pia.

871
00:41:49,600 --> 00:41:52,730
Kwa kweli, sisi daima kuanza CS50
muhula huu kuja Jumamosi,

872
00:41:52,730 --> 00:41:54,330
na kile kinachoitwa CS50 Puzzle Siku.

873
00:41:54,330 --> 00:41:56,710
>> Ina chochote cha kufanya na
sayansi ya kompyuta per se,

874
00:41:56,710 --> 00:41:58,669
lakini pamoja na kuhusu tatizo
kutatua zaidi kwa ujumla.

875
00:41:58,669 --> 00:42:01,210
Na kama wewe ili kuchagua kushiriki,
per baadhi ya mialiko,

876
00:42:01,210 --> 00:42:03,460
unaweza kuwa na kuonekana mlango
imeshuka au juu ya hatua hapa,

877
00:42:03,460 --> 00:42:05,830
ni fursa katika timu
mbili au tatu au nne,

878
00:42:05,830 --> 00:42:10,680
kushiriki kwa puzzles na pizza
na zawadi na more-- Jumamosi hii,

879
00:42:10,680 --> 00:42:12,560
kukaa tuned kwa zaidi.

880
00:42:12,560 --> 00:42:15,082
>> Utakuta pia kwamba kila
Ijumaa, katika Moto na Ice,

881
00:42:15,082 --> 00:42:16,790
haina CS50 kuleta
zima rundo la wanafunzi

882
00:42:16,790 --> 00:42:19,100
kwa chakula cha mchana, ili kufanya kubwa
darasani kujisikia ionekane zaidi,

883
00:42:19,100 --> 00:42:21,820
na kwa ujumla kuleta pamoja
Mbegu na marafiki kutoka sekta

884
00:42:21,820 --> 00:42:24,710
kuzungumza kuhusu nini wameweza
umekuwa hadi tangu kufuzu.

885
00:42:24,710 --> 00:42:27,820
Vile vile, mwaka huu, mapenzi sisi
tawaza kwanza milele CS50 50

886
00:42:27,820 --> 00:42:31,390
coding contest-- katikati ya muhula
fursa ya kuruhusu kila mtu

887
00:42:31,390 --> 00:42:35,430
juu ya opt katika misingi, kuwa na
changamoto ya akili dhidi ya wanafunzi wenzake,

888
00:42:35,430 --> 00:42:39,250
tena katika timu ya watu wawili au watatu au
nne, kwa kutumia tu kuwa programu

889
00:42:39,250 --> 00:42:41,920
savvy kwamba wewe kisha kuwa chini ya
ukanda yako baada ya sita tu au saba

890
00:42:41,920 --> 00:42:44,710
wiki ya darasa, na kushiriki
katika aina hii ya ushindani

891
00:42:44,710 --> 00:42:50,261
online-- kama Ningependa hone yako mwenyewe
ujuzi wote zaidi katika changamoto hiyo.

892
00:42:50,261 --> 00:42:52,760
Mwishoni mwa muhula ni
kinachojulikana CS50 Hackathon--

893
00:42:52,760 --> 00:42:56,970
fursa hiyo inaanza saa 7:00
PM kuishia saa 7:00 AM, na njiani

894
00:42:56,970 --> 00:43:01,900
ni masaa 12 jioni katika ambayo kwa kupiga mbizi
katika kozi ya project-- mwisho

895
00:43:01,900 --> 00:43:04,820
fursa ya kubuni na
kutekeleza wengi chochote cha riba

896
00:43:04,820 --> 00:43:06,980
na wewe fundisho lenu
mwongozo wa wenzake.

897
00:43:06,980 --> 00:43:09,600
Karibu 09:00 kufanya sisi kawaida
kutumikia pizza, 1:00,

898
00:43:09,600 --> 00:43:13,210
Philippe, na wachache wetu
ambao bado ni ari saa 5:00 AM,

899
00:43:13,210 --> 00:43:16,310
ni kuhamisha bussed chini
barabara ya IHOP ajili ya kifungua kinywa.

900
00:43:16,310 --> 00:43:19,340
>> siku na kisha chache baadaye
ni kinachojulikana CS50 fare--

901
00:43:19,340 --> 00:43:23,450
mwisho wa maonyesho muhula katika
maadhimisho ya tu jinsi mbali hivyo wengi

902
00:43:23,450 --> 00:43:28,200
ya CS50 wanafunzi wametoka
wiki zero njia yote ya juma,

903
00:43:28,200 --> 00:43:32,610
na kuweka akilini kwamba 73% ya wale
wanafunzi wenzao na yako mwaka huu na

904
00:43:32,610 --> 00:43:34,840
kamwe kuchukuliwa darasa CS kabla.

905
00:43:34,840 --> 00:43:39,226
Kwa kweli, kwa reemphasize kama kiasi, hapa
ni nyuso chache zaidi kutoka kwa wafanyakazi CS50.

906
00:43:39,226 --> 00:43:40,184
SPIKA 4: [inaudible].

907
00:43:40,184 --> 00:43:45,909

908
00:43:45,909 --> 00:43:46,867
SPIKA 5: [inaudible].

909
00:43:46,867 --> 00:43:51,332

910
00:43:51,332 --> 00:43:52,290
SPIKA 6: [inaudible].

911
00:43:52,290 --> 00:43:55,276

912
00:43:55,276 --> 00:43:56,234
SPIKA 7: [inaudible].

913
00:43:56,234 --> 00:44:01,727

914
00:44:01,727 --> 00:44:02,643
SPIKA 8: [inaudible]

915
00:44:02,643 --> 00:44:10,066

916
00:44:10,066 --> 00:44:11,024
SPIKA 9: [inaudible].

917
00:44:11,024 --> 00:44:14,475

918
00:44:14,475 --> 00:44:15,461
>> SPIKA 4: [inaudible].

919
00:44:15,461 --> 00:44:16,461
>> SPIKA 10: [inaudible].

920
00:44:16,461 --> 00:44:21,456

921
00:44:21,456 --> 00:44:23,438
SPIKA 11: [inaudible].

922
00:44:23,438 --> 00:44:24,438
SPIKA 12: [inaudible].

923
00:44:24,438 --> 00:44:30,438

924
00:44:30,438 --> 00:44:31,396
SPIKA 13: [inaudible]

925
00:44:31,396 --> 00:44:37,360

926
00:44:37,360 --> 00:44:40,342
>> SPIKA 14: [inaudible].

927
00:44:40,342 --> 00:44:42,863
>> SPIKA 13: [inaudible].

928
00:44:42,863 --> 00:44:43,821
SPIKA 15: [inaudible]

929
00:44:43,821 --> 00:44:48,785

930
00:44:48,785 --> 00:44:49,785
SPIKA 16: [inaudible].

931
00:44:49,785 --> 00:44:53,761

932
00:44:53,761 --> 00:44:55,252
>> SPIKA 11: [inaudible]

933
00:44:55,252 --> 00:44:57,773

934
00:44:57,773 --> 00:44:58,731
SPIKA 5: [inaudible].

935
00:44:58,731 --> 00:45:11,250

936
00:45:11,250 --> 00:45:15,130
DAVID Malan: Baadhi ya timu
ni wenyewe kufanya manunuzi madarasa.

937
00:45:15,130 --> 00:45:17,760
Lakini kama wanachama hao
ya wafanyakazi CS50 ni hapa,

938
00:45:17,760 --> 00:45:19,230
inaweza kuja juu juu kwa muda tu.

939
00:45:19,230 --> 00:45:23,450
CS50 ya TFS na CAS na [? wafanyakazi?]
wanachama here-- hizi ni chache tu

940
00:45:23,450 --> 00:45:28,880
ya faces-- mmoja wao wewe tu
nikaona, na wachache other-- na wengine wachache

941
00:45:28,880 --> 00:45:30,020
bado.

942
00:45:30,020 --> 00:45:33,242
Mbona sisi kwenda mbele na kuruhusu
wewe guys dakika tano mapumziko.

943
00:45:33,242 --> 00:45:35,450
Kama unahitaji bata nje ya
madarasa duka, hiyo ni nzuri.

944
00:45:35,450 --> 00:45:38,900
Na katika dakika tano, tutaweza kuanza,
kuchukua kuangalia Scratch-- kwanza

945
00:45:38,900 --> 00:45:42,420
ya lugha yetu programu, kukutana na
wafanyakazi kozi ya hapa wengine zaidi,

946
00:45:42,420 --> 00:45:45,020
na kuzingatia hatimaye
juu ya tatizo kuweka zero.

947
00:45:45,020 --> 00:45:46,710
Hivyo tutaweza kuwa nyuma katika muda wa dakika tano.

1
00:45:46,864 --> 00:45:47,370
>> Sawa.

2
00:45:47,370 --> 00:45:48,590
Hivyo sisi ni nyuma.

3
00:45:48,590 --> 00:45:51,330
Na katika iliyobaki yetu
muda leo, lengo

4
00:45:51,330 --> 00:45:54,320
ni kwa kiwango uwanja wa kucheza
katika suala la baadhi ya istilahi,

5
00:45:54,320 --> 00:45:55,297
katika suala la baadhi ya mawazo.

6
00:45:55,297 --> 00:45:57,380
Kwa sababu kwa kweli, kama kwa
baadhi ya chati hapo awali,

7
00:45:57,380 --> 00:46:00,130
kuna ni kwenda kuwa aina mbalimbali ya
ngazi ya uzoefu katika darasa,

8
00:46:00,130 --> 00:46:03,210
baadhi ya ambao wanafunzi na
kuchukuliwa baadhi ya programu kabla,

9
00:46:03,210 --> 00:46:04,200
ambao baadhi yao hawana.

10
00:46:04,200 --> 00:46:07,430
Na hivyo na tatizo hili kwanza
kuweka na kwa lugha hii ya kwanza

11
00:46:07,430 --> 00:46:10,830
Je, tuna fursa ya kuanza
kuchukua kwa nafasi baada ya leo

12
00:46:10,830 --> 00:46:12,960
baadhi msamiati wa kawaida na wazo.

13
00:46:12,960 --> 00:46:15,590
>> Na tutaweza kufanya hivyo kwa njia ya
kozi ya languages-- kwanza

14
00:46:15,590 --> 00:46:21,070
Mbali na C na Python na
JavaScript na SQL na HTML na CSS,

15
00:46:21,070 --> 00:46:24,450
tutaweza kuwa na kuelekeza nguvu awali
na tu kwa ajili ya tatizo kuweka zero

16
00:46:24,450 --> 00:46:28,160
juu ya hii lugha graphical, iitwayo
Scratch, iliyoandaliwa na MIT Media Lab'S

17
00:46:28,160 --> 00:46:30,880
chini ya barabara, ili kusaidia
wanafunzi na watoto hasa

18
00:46:30,880 --> 00:46:35,070
kujieleza algorithmically--
katika njia zaidi sambamba na nini

19
00:46:35,070 --> 00:46:37,300
sisi tupate kuwaita kufikiri computational.

20
00:46:37,300 --> 00:46:40,985
>> Na ni lugha muhimu kwa sababu
haraka sana wiki ijayo katika wiki moja,

21
00:46:40,985 --> 00:46:44,360
Je, sisi mpito kwa zaidi
lugha za jadi na arcane aitwaye

22
00:46:44,360 --> 00:46:46,370
C, ambayo ni rena textual.

23
00:46:46,370 --> 00:46:48,930
Wewe tu kutumia keyboard yako katika
Ili kuandika maelekezo

24
00:46:48,930 --> 00:46:50,230
kama haya juu ya screen.

25
00:46:50,230 --> 00:46:52,840
Lakini hata kama wewe sijawahi kuona
lugha ya programu kabla,

26
00:46:52,840 --> 00:46:55,170
katika tu glancing katika
huu, wote kuwa ni cryptic,

27
00:46:55,170 --> 00:47:00,010
pengine unaweza nadhani kwamba
pengine Prints Hello World.

28
00:47:00,010 --> 00:47:02,050
Lakini kuna mengi ya
kisintaksia uendeshaji huko.

29
00:47:02,050 --> 00:47:05,770
Kuna hash weird
alama au hash tag juu juu.

30
00:47:05,770 --> 00:47:08,900
Kuna mabano angle, baadhi
mabano, curly braces, nusu colon--

31
00:47:08,900 --> 00:47:11,880
kuna kiasi tu Visual
syntax kwamba anapata katika njia.

32
00:47:11,880 --> 00:47:13,940
Sisi kuanza kozi na
Scratch ili kupata

33
00:47:13,940 --> 00:47:17,600
siku za nyuma wote wa wale kielimu
uninteresting distractions,

34
00:47:17,600 --> 00:47:20,290
na lengo badala yake juu ya mawazo.

35
00:47:20,290 --> 00:47:22,540
>> Kwa kweli, hii inaweza kuwa kabla.

36
00:47:22,540 --> 00:47:24,830
Hii, kwa hili, wiki yatatajwa.

37
00:47:24,830 --> 00:47:26,760
Hii, kwa graphical hii
lugha Scratch,

38
00:47:26,760 --> 00:47:29,870
ni jinsi gani kutekeleza hiyo
program-- mpango kwamba wakati kukimbia,

39
00:47:29,870 --> 00:47:31,340
tu anasema hujambo dunia.

40
00:47:31,340 --> 00:47:34,740
Na nini ni nzuri kuhusu Scratch ni
kuwa ni programu hii graphical

41
00:47:34,740 --> 00:47:38,780
mazingira ambayo inatumia vipande puzzle au
vitalu, kwamba tu interlock pamoja

42
00:47:38,780 --> 00:47:40,440
kama inafanya hisia mantiki ya kufanya hivyo.

43
00:47:40,440 --> 00:47:43,810
Na kwa Scratch unaweza kuendeleza
mifano kwa michoro na michezo ya maingiliano

44
00:47:43,810 --> 00:47:47,270
na sanaa, na idadi yoyote ya mambo ambayo
unaweza kufikiria katika akili yako mwenyewe,

45
00:47:47,270 --> 00:47:51,200
na kutekeleza yao tu kwa
akawatoa na kuacha vipande puzzle.

46
00:47:51,200 --> 00:47:54,265
>> Na hakika, tutaweza kuwa na uwezo
kueleza baadhi ya mawazo sawa

47
00:47:54,265 --> 00:47:56,890
kwamba mimi tu zilizotajwa wakati
iliyopita katika mazingira ya Mike Smith

48
00:47:56,890 --> 00:48:00,670
na kutafuta simu book-- mambo
kama kazi, vitendo tu,

49
00:48:00,670 --> 00:48:03,070
mambo kama loops kwamba kufanya
mambo tena na tena,

50
00:48:03,070 --> 00:48:05,170
vigezo, ambayo ni
kitu tutaweza kuanzisha,

51
00:48:05,170 --> 00:48:08,086
lakini ni ukoo pengine kutokana na
algebra baadhi tu ya aina ya placeholder

52
00:48:08,086 --> 00:48:10,840
kuhifadhi baadhi thamani waweza
haja later-- maneno Boolean,

53
00:48:10,840 --> 00:48:13,720
ambapo wale ndiyo hakuna au kweli
maswali uongo mbele.

54
00:48:13,720 --> 00:48:17,117
Masharti ni forks wale walio katika
road-- matawi hayo hivyo kusema.

55
00:48:17,117 --> 00:48:19,700
Na kisha kuna baadhi ya fancier
makala tutaona hata leo,

56
00:48:19,700 --> 00:48:22,850
aitwaye arrays na nyuzi na
matukio, kwamba tutaweza basi kupitia upya juu ya

57
00:48:22,850 --> 00:48:24,460
muda katika lugha mbalimbali.

58
00:48:24,460 --> 00:48:26,790
Lakini Scratch inaruhusu sisi
kuchunguza yote haya.

59
00:48:26,790 --> 00:48:30,779
Hivyo hapa katika Scratch, hii zambarau
kuzuia ni nini kazi ni kawaida

60
00:48:30,779 --> 00:48:31,570
kwenda kuangalia kama.

61
00:48:31,570 --> 00:48:35,620
Hii zambarau puzzle kipande kwamba ina baadhi
neno kama kusema, ambayo ni hatua,

62
00:48:35,620 --> 00:48:38,490
na basi inaweza kuwa na
Hoja au parameter-- namna fulani

63
00:48:38,490 --> 00:48:41,140
ya aina ya customizing
nini kwamba kuzuia gani

64
00:48:41,140 --> 00:48:45,182
hivyo kwamba ni si kabla ya kuamua na
MIT nini kuzuia hii zambarau anasema.

65
00:48:45,182 --> 00:48:47,390
Kwa kweli, utaona katika
wakati huo mimi nina uwezo wa aina

66
00:48:47,390 --> 00:48:49,931
maneno kama hujambo dunia, au
hujambo Daudi, au hodi Zamayla,

67
00:48:49,931 --> 00:48:53,750
au chochote mimi nataka, katika hoja
kwa puzzle kwamba piece-- sanduku nyeupe

68
00:48:53,750 --> 00:48:54,251
huko.

69
00:48:54,251 --> 00:48:57,166
Wakati huo huo, kama nataka kitanzi, tutaweza
kuona kwamba kuna vipande puzzle kwamba

70
00:48:57,166 --> 00:48:58,640
kuangalia rangi ya machungwa kidogo kama hii.

71
00:48:58,640 --> 00:49:01,690
Na sura zao aina ya unaonyesha kwamba
kitu kinachotokea tena na tena

72
00:49:01,690 --> 00:49:02,680
katika mzunguko.

73
00:49:02,680 --> 00:49:06,800
>> Hivyo kama mimi wrap kusema hello kuzuia dunia
na milele kuzuia katika Scratch,

74
00:49:06,800 --> 00:49:10,307
ni tu kwenda kuweka kusema hello
dunia milele, halisi kabisa.

75
00:49:10,307 --> 00:49:12,390
Wakati huo huo, kuna mwingine
aina ya kitanzi katika Scratch

76
00:49:12,390 --> 00:49:14,348
kwamba tutaweza see-- kurudia
block-- ambapo, kama wewe

77
00:49:14,348 --> 00:49:17,940
kujua mapema ni mara ngapi
unataka kitanzi kutekeleza

78
00:49:17,940 --> 00:49:21,850
finite idadi ya nyakati katika fact-- wewe
Unaweza kutaja kwamba kwa kuandika katika idadi

79
00:49:21,850 --> 00:49:25,380
au hata plugging katika variable,
kama x au y kama tutaweza kuona.

80
00:49:25,380 --> 00:49:27,690
>> Kwa kweli, vigezo kama
i katika kesi hii, ambayo

81
00:49:27,690 --> 00:49:30,109
ni jina la kawaida kwa
integer kwamba kutofautiana

82
00:49:30,109 --> 00:49:31,900
tu maduka number--
integer inaweza kuwa,

83
00:49:31,900 --> 00:49:35,470
kutumia hii ya kuzuia machungwa hapa
kuweka variable kama i kwa sifuri.

84
00:49:35,470 --> 00:49:38,900
Hapa ni mfano katika kijani ya
Kujieleza Boolean katika Scratch.

85
00:49:38,900 --> 00:49:43,700
Hata ingawa hii inaonekana kama math
formula, ukosefu wa usawa math kama hii

86
00:49:43,700 --> 00:49:45,320
kweli ni Boolean misemo.

87
00:49:45,320 --> 00:49:46,570
Hii ni ama kweli au uongo.

88
00:49:46,570 --> 00:49:48,300
Mimi ni chini ya 50.

89
00:49:48,300 --> 00:49:51,815
Ni ama ndiyo au hapana jibu
au kweli au uongo jibu.

90
00:49:51,815 --> 00:49:53,940
Na tutaweza ujumla kuwaita
wale maneno Boolean.

91
00:49:53,940 --> 00:49:55,148
Na haina kuwa 50.

92
00:49:55,148 --> 00:49:57,970
Ni inaweza kuwa x chini ya y,
kubwa kuliko y, sawa na y--

93
00:49:57,970 --> 00:50:00,020
idadi yoyote ya wengine
maswali yanayoweza kuulizwa.

94
00:50:00,020 --> 00:50:03,250
>> Sasa, katika mtazamo wa kwanza, hii inaweza kuangalia
ghafla ujasiri kabisa hapa, na ni.

95
00:50:03,250 --> 00:50:06,540
Lakini dhana busara, ni
pretty ukoo kutoka kabla.

96
00:50:06,540 --> 00:50:09,370
Kama x ni chini ya y, kuliko kusema kama mengi.

97
00:50:09,370 --> 00:50:12,230
Mwingine kama x ni mkubwa
kuliko y, basi sema kama mengi.

98
00:50:12,230 --> 00:50:14,260
Mwingine kusema x ni sawa na y.

99
00:50:14,260 --> 00:50:17,220
Hivyo tuna mfano
kuna ya scenario-- tatu

100
00:50:17,220 --> 00:50:20,600
theluthi moja tu possibility-- x ni ama
kubwa kuliko, chini ya au sawa na.

101
00:50:20,600 --> 00:50:22,420
Hivyo tuna tatu njia uma katika barabara.

102
00:50:22,420 --> 00:50:26,290
>> Na taarifa ya nini ni baridi here-- Scratch,
inaweza kuonekana, ina puzzle moja tu

103
00:50:26,290 --> 00:50:28,840
kipande, katika kesi hii, katika kama mwingine block.

104
00:50:28,840 --> 00:50:32,090
Na bado ambayo wanaonekana kuashiria unaweza
tu kuwa njia mbili uma katika barabara.

105
00:50:32,090 --> 00:50:34,631
Unaweza kwenda kushoto au kulia, lakini
nini kuhusu mazingira kwamba theluthi?

106
00:50:34,631 --> 00:50:35,760
Nini kama x sawa na y?

107
00:50:35,760 --> 00:50:36,500
Hakuna mpango mkubwa.

108
00:50:36,500 --> 00:50:39,640
Kuchukua moja puzzle kipande, kuweka
mwingine mmoja ndani yake

109
00:50:39,640 --> 00:50:45,759
kujenga sawa semantic
ya kama, mwingine kama, else-- na sasa

110
00:50:45,759 --> 00:50:47,300
kuwa na njia tatu yako uma katika barabara.

111
00:50:47,300 --> 00:50:49,091
Na kama tutaweza kuona,
vipande Scratch puzzle

112
00:50:49,091 --> 00:50:51,820
inaweza kuwa aliweka na kukua, hivyo
kama Cram mambo zaidi katika yao.

113
00:50:51,820 --> 00:50:54,420
Huwezi kuwa na kifafa
kila kitu katika kawaida yake ya msingi.

114
00:50:54,420 --> 00:50:56,690
>> Hii ni kitu tutaweza
haraka kuona inaitwa safu.

115
00:50:56,690 --> 00:51:00,880
Ni kama list-- baadhi ya njia ya
kuhifadhi vipande mbalimbali wa habari

116
00:51:00,880 --> 00:51:02,886
katika kutofautiana, si tu idadi.

117
00:51:02,886 --> 00:51:05,760
Hizi tutaona mwakilishi wa
kitu kinachoitwa mbalimbali threading.

118
00:51:05,760 --> 00:51:08,280
Kwa kweli, wote wa yako
Macs na PC siku hizi

119
00:51:08,280 --> 00:51:10,810
msaada mbalimbali threading,
ambayo ina maana unaweza literally

120
00:51:10,810 --> 00:51:12,390
kufanya mambo mengi kwa wakati.

121
00:51:12,390 --> 00:51:15,390
Unaweza kuwa na Microsoft Word up katika
foreground, kufanya kazi katika baadhi insha.

122
00:51:15,390 --> 00:51:17,160
Unaweza kuwa na kisakuzi
katika background ufunguzi

123
00:51:17,160 --> 00:51:18,720
G-mail au Facebook au kama.

124
00:51:18,720 --> 00:51:22,730
kompyuta yako inaweza kufanya mambo mbalimbali
leo kwa sababu ni mbalimbali Threaded,

125
00:51:22,730 --> 00:51:26,390
na mipango wao uko katika katika
Hasa pia ni multi-Threaded.

126
00:51:26,390 --> 00:51:28,970
>> Kuna mambo kuitwa matukio kama
vizuri katika ulimwengu wa Scratch,

127
00:51:28,970 --> 00:51:32,640
na kisha kuna njia pia, ili kufanya
vipande desturi yetu wenyewe puzzle kama mambo

128
00:51:32,640 --> 00:51:34,810
si kweli zipo mapema.

129
00:51:34,810 --> 00:51:38,260
Basi hebu kuwahamasisha hii kama ifuatavyo.

130
00:51:38,260 --> 00:51:40,580
Baadhi ya miaka iliyopita, wakati mimi
kwanza aligundua Scratch,

131
00:51:40,580 --> 00:51:43,530
nilipokuwa kweli
grad mwanafunzi katika MIT, sisi

132
00:51:43,530 --> 00:51:45,640
wenyewe walikuwa na kazi ya kufanya kazi za nyumbani.

133
00:51:45,640 --> 00:51:47,614
Na mimi implemented--
ambayo, katika retrospect,

134
00:51:47,614 --> 00:51:50,780
Ilikuwa ni uamuzi maskini sana kwa sababu ni
zaidi infuriating wimbo katika dunia

135
00:51:50,780 --> 00:51:53,321
kuwasikiliza kwa saa nane
wakati wa kufanya kazi juu ya homework-- yako

136
00:51:53,321 --> 00:51:57,180
lakini kitu Mimi nilikuwa na wito Oscar Time,
ambayo ni labda wimbo familiar.

137
00:51:57,180 --> 00:51:59,820
>> CS50s kumiliki Jordan Hayashi, mmoja wa
yetu zaidi wanachama waandamizi wafanyakazi,

138
00:51:59,820 --> 00:52:03,920
imeboresha yake kwa mwaka 2015 na
sasa 2016, tangu nyuma katika siku,

139
00:52:03,920 --> 00:52:06,610
Nilikuwa na kila kitu tu kwenda
katika Oscar ya takataka unaweza.

140
00:52:06,610 --> 00:52:09,320
Sasa sisi msaada kusindika na mbolea.

141
00:52:09,320 --> 00:52:12,050
>> Lakini kuchora picha
ya nini tunaweza kufanya hapa

142
00:52:12,050 --> 00:52:14,130
na kuwahamasisha baadhi ya
kiwango cha mifano ya chini,

143
00:52:14,130 --> 00:52:16,400
tunaweza kupata mtu mwingine
kujitolea kuja tu juu ya up

144
00:52:16,400 --> 00:52:18,331
na kucheza yangu ya kwanza
homework zoezi milele?

145
00:52:18,331 --> 00:52:18,830
Kuja juu juu.

146
00:52:18,830 --> 00:52:19,250
Jina lako nani?

147
00:52:19,250 --> 00:52:20,030
>> HENRY: Henry.

148
00:52:20,030 --> 00:52:22,660
>> DAVID Malan: Henry, kuja juu juu.

149
00:52:22,660 --> 00:52:24,190
Kuja juu juu.

150
00:52:24,190 --> 00:52:27,070
Kichwa ama njia, na
utaona katika wakati huu,

151
00:52:27,070 --> 00:52:29,870
Mimi nina kwenda mbele na kugonga
bendera ya kijani katika mkono juu kulia

152
00:52:29,870 --> 00:52:31,100
kona, ambayo ina maana kwenda.

153
00:52:31,100 --> 00:52:33,320
kidogo kuacha ishara icon
ni kwenda kusema stop,

154
00:52:33,320 --> 00:52:35,490
na kwamba wakati wa kuanza
na kuacha mpango.

155
00:52:35,490 --> 00:52:36,450
Nimefurahi kukutana na wewe.

156
00:52:36,450 --> 00:52:36,950
Sawa.

157
00:52:36,950 --> 00:52:39,100
Hivyo sisi ni kwenda kuona maelekezo
juu ya screen katika muda tu.

158
00:52:39,100 --> 00:52:41,450
Na tu kwa kucheza mchezo huu
kwa ajili ya wachache seconds-- imani yangu,

159
00:52:41,450 --> 00:52:43,670
sisi siyo kwenda kutaka kucheza
njia yote ya end-- wewe

160
00:52:43,670 --> 00:52:45,470
kupata hisia ya kile mpango gani.

161
00:52:45,470 --> 00:52:49,170
Na zaidi ya tu kuzingatia Henry
kuwa mzuri au mbaya katika mchezo huu, lengo

162
00:52:49,170 --> 00:52:52,600
na ilikuwaje kutekelezwa na mimi
awali na kisha kwa Jordan.

163
00:52:52,600 --> 00:52:54,640
Kwa maneno mengine, ambapo ni vigezo?

164
00:52:54,640 --> 00:52:55,520
Ambapo ni loops?

165
00:52:55,520 --> 00:52:56,520
Ambapo ni kazi?

166
00:52:56,520 --> 00:53:00,700
Na tutaweza kuona kama hatuoni
wale chini ya Hood.

167
00:53:00,700 --> 00:53:03,660
>> Tu click na Drag takataka
kwa bin mwafaka.

168
00:53:03,660 --> 00:54:02,100
>> [Music kucheza]

169
00:54:02,100 --> 00:54:02,600
Sawa.

170
00:54:02,600 --> 00:54:03,160
Hiyo ni nzuri sana.

171
00:54:03,160 --> 00:54:04,286
Mbona sisi kuacha ni huko.

172
00:54:04,286 --> 00:54:04,786
Asante.

173
00:54:04,786 --> 00:54:05,830
Hongera Henry.

174
00:54:05,830 --> 00:54:07,002
Asante.

175
00:54:07,002 --> 00:54:10,690
>> [Makofi]

176
00:54:10,690 --> 00:54:12,450
>> Hebu fikiria debugging mpango huo.

177
00:54:12,450 --> 00:54:15,880
Kama kuna tatizo wawili
Dakika katika song-- lakini hivyo

178
00:54:15,880 --> 00:54:17,430
nini kinaendelea hapa kweli?

179
00:54:17,430 --> 00:54:20,900
Kama ngumu kama nguvu
kuanza kuonekana kupata baada ya muda,

180
00:54:20,900 --> 00:54:22,910
Hakika zaidi na zaidi
mambo ilianza kuanguka,

181
00:54:22,910 --> 00:54:25,370
nini kuvutia kuhusu
aina hii ya example--

182
00:54:25,370 --> 00:54:27,270
na tutaweza kuona chache
others-- ni kwamba kama wewe

183
00:54:27,270 --> 00:54:30,416
kuangalia nyuma utata au
sophistication ya mchezo,

184
00:54:30,416 --> 00:54:33,040
kuna jengo rahisi sana
vitalu kwamba play-- ambayo yote,

185
00:54:33,040 --> 00:54:35,840
kama wewe distill yao kwa wale
ujenzi wa vitalu, ni kupatikana sana

186
00:54:35,840 --> 00:54:37,401
na kutekelezeka kwa ajili yao wenyewe.

187
00:54:37,401 --> 00:54:39,150
Kwa mfano, ni
imekuwa muda fulani, lakini mimi nina

188
00:54:39,150 --> 00:54:42,900
pretty uhakika nini Mimi awali alifanya wakati
kufanya mchezo huu kwa mara ya kwanza

189
00:54:42,900 --> 00:54:44,787
ilikuwa ni mimi kabisa kama procrastinated.

190
00:54:44,787 --> 00:54:47,120
Sikuwa kuzingatia wakati wote kwenye
mantiki au vipande puzzle,

191
00:54:47,120 --> 00:54:50,810
Mimi ililenga graphics na kutafuta
mitaani baada na takataka unaweza

192
00:54:50,810 --> 00:54:51,540
na yote hayo.

193
00:54:51,540 --> 00:54:53,456
Lakini wale walikuwa zinazohitajika
viungo mara ya kwanza.

194
00:54:53,456 --> 00:54:57,220
Na mara moja mimi kumaliza procrastinating na
kuwekewa nje kuu mfumo,

195
00:54:57,220 --> 00:55:00,337
Niliamua, napenda tu kufanya moja
kipande cha takataka kuanguka kutoka angani.

196
00:55:00,337 --> 00:55:02,170
Na tutaweza kuona Scratch
inasaidia mambo kuitwa

197
00:55:02,170 --> 00:55:06,386
sprites-- wahusika ambayo yanaweza
na mavazi tofauti juu ya hivyo

198
00:55:06,386 --> 00:55:07,010
kuangalia tofauti.

199
00:55:07,010 --> 00:55:09,660
>> Na hivyo mimi kuweka takataka
Costume juu ya sprite mmoja kama.

200
00:55:09,660 --> 00:55:12,007
Na mimi tu zinahitajika yake
kuanguka kutoka angani.

201
00:55:12,007 --> 00:55:14,590
Na hivyo ni zamu nje, Scratch,
kama lugha nyingi programu,

202
00:55:14,590 --> 00:55:18,099
inasaidia idadi random au
kitaalam pseudocode random idadi,

203
00:55:18,099 --> 00:55:20,390
ili na akawatoa na
kuacha vipande fulani puzzle,

204
00:55:20,390 --> 00:55:22,890
Nilikuwa na uwezo wa kuwa na takataka
kuja kutoka kushoto mara ya kwanza.

205
00:55:22,890 --> 00:55:25,580
Na kisha wakati ujao kutua, kutoka
kulia na kisha kutoka katikati.

206
00:55:25,580 --> 00:55:28,060
Na mchezo wote hawakuwa mara tu
na takataka kuanguka kutoka mbinguni.

207
00:55:28,060 --> 00:55:29,770
Unaweza si uhakika katika hilo au bonyeza juu yake.

208
00:55:29,770 --> 00:55:31,103
Unaweza si kufungua takataka unaweza.

209
00:55:31,103 --> 00:55:32,160
Unaweza si kufanya kitu chochote.

210
00:55:32,160 --> 00:55:34,450
Lakini ilikuwa mtoto hatua
kuelekea maono yangu ya mwisho.

211
00:55:34,450 --> 00:55:36,720
>> Na baada ya kuwa, mimi kwa kweli
kutekelezwa aina fulani

212
00:55:36,720 --> 00:55:41,230
ya kuhisi hivyo kwamba kama hakuwa na bonyeza
na Drag juu ya kipande cha takataka

213
00:55:41,230 --> 00:55:44,350
zaidi ya takataka unaweza, Oscar ya
mfuniko itakuwa kufungua na kufunga.

214
00:55:44,350 --> 00:55:47,650
Hakuna kitu kitakachotokea takataka, lakini
angalau mfuniko itakuwa kufungua na kufunga.

215
00:55:47,650 --> 00:55:49,642
Hivyo basi angalia, hatua mbili wa mbili.

216
00:55:49,642 --> 00:55:52,100
Na hii ni nini kinaendelea kuwa
muhimu katika tatizo wawili kuweka zero

217
00:55:52,100 --> 00:55:55,970
na katika programu zaidi kwa ujumla, ni
kuchukua hizi hatua za makusudi sana mtoto.

218
00:55:55,970 --> 00:55:59,390
Kwa sababu si tu gani kuruhusu
kujisikia uaminifu mambo mengi zaidi

219
00:55:59,390 --> 00:56:01,250
quickly-- ni
jambo mbaya zaidi duniani

220
00:56:01,250 --> 00:56:06,149
kujaribu kutekeleza yote ya Oscar Time,
kisha masaa baadaye kugonga bendera ya kijani,

221
00:56:06,149 --> 00:56:08,440
na hakuna kitu kazi kama ilivyotarajiwa
kwa sababu wapi wewe hata

222
00:56:08,440 --> 00:56:11,150
kuanza Debug au kwa
troubleshoot mpango huo?

223
00:56:11,150 --> 00:56:12,470
Ni tu balaa.

224
00:56:12,470 --> 00:56:16,792
>> Na hivyo kweli enea wazo hili
ya kuchukua hatua steps-- mtoto tena

225
00:56:16,792 --> 00:56:19,000
na again-- kujijenga
kitu ambacho ni, katika mwisho,

226
00:56:19,000 --> 00:56:23,672
kweli ya kuvutia na ngumu, lakini
mara ya kwanza, ni karibu kama si hivyo kiasi.

227
00:56:23,672 --> 00:56:24,630
Kwa kweli, hebu kufanya hili.

228
00:56:24,630 --> 00:56:28,989
Hebu kwenda mbele and-- Scratch yenyewe
ipo kwenye mtandao katika Scratch.MIT.edu,

229
00:56:28,989 --> 00:56:30,780
na wewe utakuwa kuambiwa kama
mengi tena katika tatizo

230
00:56:30,780 --> 00:56:34,200
kuweka zero, vipimo kwa ajili ya
ambayo tayari kwenye tovuti CS50.

231
00:56:34,200 --> 00:56:35,725
>> Lakini hii ni nini Scratch yenyewe ni.

232
00:56:35,725 --> 00:56:38,210
Na kuna kweli tu
maeneo matatu ya msingi.

233
00:56:38,210 --> 00:56:40,980
Katika juu kushoto huko
ni kinachojulikana hatua.

234
00:56:40,980 --> 00:56:41,810
Hii ni Scratch.

235
00:56:41,810 --> 00:56:43,710
default Costume ni paka.

236
00:56:43,710 --> 00:56:46,950
Na hii ni dunia rectangular katika
ambayo unaweza move-- juu, chini, kushoto,

237
00:56:46,950 --> 00:56:48,130
haki na baadhi ya mambo mengine.

238
00:56:48,130 --> 00:56:51,839
Katikati hapa ni makundi yetu
au pallets yetu ya vipande puzzle,

239
00:56:51,839 --> 00:56:53,630
na rangi tofauti
maana mambo mbalimbali.

240
00:56:53,630 --> 00:56:56,520
Na kama wewe poke kuzunguka, utaona
mambo kama loops na masharti

241
00:56:56,520 --> 00:56:58,160
na vigezo na viungo vingine.

242
00:56:58,160 --> 00:57:00,060
>> Na kisha juu hapa ni eneo scripts.

243
00:57:00,060 --> 00:57:03,020
Hii ni pale ambapo mimi unaweza Drag na kuacha
vipande wale puzzle kufanya mambo.

244
00:57:03,020 --> 00:57:04,690
Basi hebu kufanya jambo moja kama hizo.

245
00:57:04,690 --> 00:57:06,630
Hebu kwenda mbele and--
na najua ambapo ni.

246
00:57:06,630 --> 00:57:10,110
Hivyo nina kwenda kwa mara moja bonyeza
ambapo Mimi najua mambo ni tayari kuwa,

247
00:57:10,110 --> 00:57:13,140
lakini akizungumzia na kubonyeza na
poking kuzunguka ni lazima.

248
00:57:13,140 --> 00:57:15,320
Hivyo wakati bendera ya kijani clicked,
je, nataka kufanya?

249
00:57:15,320 --> 00:57:17,100
Mimi nina kwenda kufanya hivyo.

250
00:57:17,100 --> 00:57:20,699
Mimi nina kwenda Drag puzzle hii zambarau
kipande, kusema hello kwa sekunde mbili,

251
00:57:20,699 --> 00:57:21,490
na napenda kuvuta.

252
00:57:21,490 --> 00:57:23,865
>> Na mimi nina kwenda kubadili hali hii
kuwa kile mimi nataka be--

253
00:57:23,865 --> 00:57:26,471
hujambo dunia kwa sekunde mbili ni faini.

254
00:57:26,471 --> 00:57:28,970
Sasa, mimi nina kwenda bonyeza
kijani bendera, au kama kweli mimi nataka,

255
00:57:28,970 --> 00:57:31,820
Siwezi full screen yake na kisha kurudi tena.

256
00:57:31,820 --> 00:57:34,060
Itakuwa tu kuweka
kila kitu katika dirisha moja.

257
00:57:34,060 --> 00:57:36,141
Green flag-- hujambo dunia.

258
00:57:36,141 --> 00:57:36,640
Sawa.

259
00:57:36,640 --> 00:57:38,789
Si wote kwamba kuvutia.

260
00:57:38,789 --> 00:57:40,080
Hivyo basi mimi kwenda mbele na kufanya hili.

261
00:57:40,080 --> 00:57:41,038
Hebu jaribu mwingine mmoja.

262
00:57:41,038 --> 00:57:44,740
Wakati bendera ya kijani clicked-- hebu
kufanya kitu kama sauti.

263
00:57:44,740 --> 00:57:46,880
Na taarifa kwamba nje ya
sanduku kwa ajili ya bure unaweza kupata

264
00:57:46,880 --> 00:57:49,910
paka sauti, kama ni default sprite.

265
00:57:49,910 --> 00:57:52,380
Hivyo sasa napenda kwenda mbele na
kugonga bendera ya kijani sasa.

266
00:57:52,380 --> 00:57:53,224
>> [Meowing]

267
00:57:53,224 --> 00:57:54,490
>> Aw.

268
00:57:54,490 --> 00:57:55,370
Hiyo ni adorable.

269
00:57:55,370 --> 00:57:57,040
Mimi nina programu.

270
00:57:57,040 --> 00:57:58,550
Kwa hiyo kile Nimefanya nini?

271
00:57:58,550 --> 00:58:00,430
Hii ni sawa na mpango.

272
00:58:00,430 --> 00:58:01,600
Ni wazi super rahisi.

273
00:58:01,600 --> 00:58:05,300
Haikuwa kweli kuchukua yote kwamba mengi
juhudi na MIT alifanya zaidi ya kazi,

274
00:58:05,300 --> 00:58:07,890
lakini ninyi nimewaita kazi.

275
00:58:07,890 --> 00:58:08,940
Mimi na kutumika kazi.

276
00:58:08,940 --> 00:58:12,480
Nimekuwa alifanya baadhi ya hatua, kwa kutumia tu
kwamba mmoja zambarau puzzle kipande.

277
00:58:12,480 --> 00:58:15,960
>> Naam, kama nataka kufanya
Meows tatu mfululizo?

278
00:58:15,960 --> 00:58:18,570
Hebu kwenda mbele na kufanya mbili na tatu.

279
00:58:18,570 --> 00:58:20,910
Na taarifa kwamba wakati wewe
hover karibu puzzle kipande,

280
00:58:20,910 --> 00:58:22,970
nyeupe kidogo line inaonekana
aina ya sumaku,

281
00:58:22,970 --> 00:58:25,190
na itakuwa snap
pamoja wakati wewe basi kwenda.

282
00:58:25,190 --> 00:58:26,600
Hebu angalia nini kinatokea hapa.

283
00:58:26,600 --> 00:58:27,920
>> [Meowing]

284
00:58:27,920 --> 00:58:32,390

285
00:58:32,390 --> 00:58:34,510
>> Kuna mdudu.

286
00:58:34,510 --> 00:58:35,650
Mimi tu kusikia meow moja.

287
00:58:35,650 --> 00:58:37,440
Kwa nini inaweza kuwa nini?

288
00:58:37,440 --> 00:58:39,001
Yeah?

289
00:58:39,001 --> 00:58:39,500
Yeah.

290
00:58:39,500 --> 00:58:41,650
Sisi si kweli kusikia,
lakini hiyo ni nzuri Intuition.

291
00:58:41,650 --> 00:58:43,400
Wao ni wote kucheza kwa wakati mmoja.

292
00:58:43,400 --> 00:58:44,000
Kwa nini?

293
00:58:44,000 --> 00:58:46,587
Naam, kompyuta ni kwenda tu
kufanya nini kuwaambia ni kufanya.

294
00:58:46,587 --> 00:58:48,670
Hivyo kama wewe kusema, kucheza sauti,
kucheza sauti, kucheza sauti,

295
00:58:48,670 --> 00:58:52,887
lakini huna kuwaambia ni kucheza mpaka
wewe ni kosa, kucheza mpaka wewe ni kosa,

296
00:58:52,887 --> 00:58:54,970
itakuja pigo kwa njia
mpango kweli kasi

297
00:58:54,970 --> 00:58:56,830
na wala yale tu kuwaambia ni kufanya.

298
00:58:56,830 --> 00:58:59,040
>> Hivyo mimi kwa kweli haja ya kurekebisha
hii katika michache ya njia.

299
00:58:59,040 --> 00:59:00,623
Mimi nilikuwa tu kufanya hivyo, kujikwamua hii.

300
00:59:00,623 --> 00:59:04,180
Hebu jaribu hii puzzle mengine
piece-- kucheza meow sauti hadi kufanyika,

301
00:59:04,180 --> 00:59:07,072
na kisha Drag tatu za
hizi na bonyeza Play.

302
00:59:07,072 --> 00:59:09,430
>> [Meowing]

303
00:59:09,430 --> 00:59:13,350
>> Ni kweli very--
kuwashukuru you-- sana ya asili.

304
00:59:13,350 --> 00:59:16,590
Hivyo kwa nini sio I-- basi
niende kudhibiti hapa.

305
00:59:16,590 --> 00:59:17,090
Nice.

306
00:59:17,090 --> 00:59:22,230
Ngoja moja ya pili, na sasa napenda kwenda nyuma
sauti, na kucheza sauti hadi kufanyika,

307
00:59:22,230 --> 00:59:24,620
na kisha napenda kupata kusubiri moja ya pili.

308
00:59:24,620 --> 00:59:28,692
Na kisha basi mimi kwenda na kupata moja
zaidi ya sauti, na hapa sisi kwenda.

309
00:59:28,692 --> 00:59:31,350
>> [Meowing]

310
00:59:31,350 --> 00:59:35,930
>> kidogo zaidi ya asili, lakini
hii si ufanisi sana.

311
00:59:35,930 --> 00:59:39,830
Kama nilikuwa kupata kuchoka, wote kuwa
ni kwa ufupi, kubonyeza na kurudi

312
00:59:39,830 --> 00:59:42,724
na kwa kweli kuiga work-- yangu
kuiga pretty much na pasting.

313
00:59:42,724 --> 00:59:44,640
Hakika, kama mimi Kudhibiti
clicked au kulia clicked,

314
00:59:44,640 --> 00:59:46,500
Mimi naweza kuwa tu kunakiliwa na pasted.

315
00:59:46,500 --> 00:59:49,870
Nini itakuwa bora kujenga ya kutumia?

316
00:59:49,870 --> 00:59:51,090
Nini wazo kutoka kabla?

317
00:59:51,090 --> 00:59:51,990
>> Yeah, hivyo kitanzi.

318
00:59:51,990 --> 00:59:54,580
Na kwa kweli, kama sisi poked karibu,
tunaweza kukuta hasa kwamba.

319
00:59:54,580 --> 00:59:57,730
Hebu kwenda Matukio au tuseme Control.

320
00:59:57,730 --> 00:59:59,650
Hivyo repeat-- mimi si
unataka kuwa ni mara 10.

321
00:59:59,650 --> 01:00:01,370
Hiyo inaenda kupata annoying haraka.

322
01:00:01,370 --> 01:00:03,380
Lakini mimi kurudia mara tatu.

323
01:00:03,380 --> 01:00:06,355
Hebu nirejee nyuma kwa sauti na
kucheza sauti mpaka ni kosa.

324
01:00:06,355 --> 01:00:08,480
Hebu nirejee nyuma kwa Control
na tusubiri moja ya pili.

325
01:00:08,480 --> 01:00:10,271
Na taarifa, waweza
nadhani ni haiendani,

326
01:00:10,271 --> 01:00:13,520
lakini tena kama sumaku wewe basi ni
snap katika nafasi, itakua kujaza.

327
01:00:13,520 --> 01:00:14,971
Nini ni kucheza sasa?

328
01:00:14,971 --> 01:00:18,500
>> [Meowing]

329
01:00:18,500 --> 01:00:19,000
SAWA.

330
01:00:19,000 --> 01:00:19,660
Nice.

331
01:00:19,660 --> 01:00:22,540
Na hii ni nini itakuwa inaitwa
mpango hilo pia ni sahihi.

332
01:00:22,540 --> 01:00:27,590
Ni meowed mara tatu kwa haki
asili, lakini ni bora iliyoundwa.

333
01:00:27,590 --> 01:00:29,580
Mimi nina kutumia chini redundancy.

334
01:00:29,580 --> 01:00:30,970
Sikuwa nakala na kuweka kitu chochote.

335
01:00:30,970 --> 01:00:32,470
Mimi tu kutumika wazo bora.

336
01:00:32,470 --> 01:00:35,340
>> Sasa, hii bado si yote
kuvutia na Scratch si kufanya

337
01:00:35,340 --> 01:00:35,930
kitu chochote.

338
01:00:35,930 --> 01:00:37,388
Basi hebu kufanya kitu kingine badala yake.

339
01:00:37,388 --> 01:00:38,670
Hebu kufanya kitu milele.

340
01:00:38,670 --> 01:00:39,420
Na unajua nini?

341
01:00:39,420 --> 01:00:40,470
Mwendo inaonekana kuvutia.

342
01:00:40,470 --> 01:00:45,760
Hebu kuwa naye kusonga 10
hatua na kugonga kucheza sasa.

343
01:00:45,760 --> 01:00:46,570
>> SAWA.

344
01:00:46,570 --> 01:00:49,300
Naam tunaweza aina ya Drag
naye tena, na yeye bado

345
01:00:49,300 --> 01:00:51,250
mbio kwa sababu yeye anafanya hii milele.

346
01:00:51,250 --> 01:00:53,150
Hivyo kitanzi ni kufanya
nini ni kusema kufanya,

347
01:00:53,150 --> 01:00:54,650
lakini hii si yote ya kuvutia.

348
01:00:54,650 --> 01:00:55,310
Hebu kufanya hivyo.

349
01:00:55,310 --> 01:00:59,870
Napenda kuongeza kuzuia kudhibiti, na kutumia moja
ya wale hali kwa mara ya kwanza.

350
01:00:59,870 --> 01:01:03,119
>> Hivyo ni kwenda kutoa hoja 10 steps--
10 dots, 10 saizi juu ya screen--

351
01:01:03,119 --> 01:01:04,660
basi ni kwenda kuuliza swali hili.

352
01:01:04,660 --> 01:01:09,340
Kama kitu ni kweli, basi kufanya
kitu ndani ya kuzuia hili.

353
01:01:09,340 --> 01:01:13,060
Hivyo ni zamu nje kuhisi ina nzima
rundo la expressions-- Boolean

354
01:01:13,060 --> 01:01:16,580
maswali ya ndiyo hakuna au kweli
uongo form-- napenda kufanya hivyo.

355
01:01:16,580 --> 01:01:19,260
>> Kama touching-- na kisha kuna
hii kushuka kidogo chini menu.

356
01:01:19,260 --> 01:01:20,410
Siwezi parameterize yake.

357
01:01:20,410 --> 01:01:23,010
Kama kugusa edge-- hebu
kufanya kitu kama hicho.

358
01:01:23,010 --> 01:01:27,310
Hivyo kama kugusa edge--
Nirudishe kwa mwendo.

359
01:01:27,310 --> 01:01:32,281
Na kwa nini si sisi tu
kugeuka digrii 180?

360
01:01:32,281 --> 01:01:32,780
Sawa.

361
01:01:32,780 --> 01:01:35,070
Hivyo milele, hoja hatua 10.

362
01:01:35,070 --> 01:01:37,670
Kama wewe ni kugusa
makali, kugeuka digrii 180.

363
01:01:37,670 --> 01:01:39,720
Na si kwamba mwisho wa mpango
kwa sababu wewe ni katika milele kuzuia,

364
01:01:39,720 --> 01:01:42,053
hivyo ni kwenda kwenda tena na
tena na tena na tena.

365
01:01:42,053 --> 01:01:43,980
Basi hebu angalia nini kinatokea.

366
01:01:43,980 --> 01:01:44,785
SAWA.

367
01:01:44,785 --> 01:01:48,270
buggy kidogo, lakini aina ya baridi.

368
01:01:48,270 --> 01:01:51,710
>> Na tunaweza kuongeza hii baadhi ya mambo silly
ambayo si wote kwamba kielimu

369
01:01:51,710 --> 01:01:52,270
kuvutia.

370
01:01:52,270 --> 01:01:57,210
Lakini kama sisi kugonga hii kidogo
kipaza sauti button-- ouch.

371
01:01:57,210 --> 01:01:58,480
Napenda safi hii up.

372
01:01:58,480 --> 01:02:01,540
Napenda kuongeza hii kama
wangeweza kusema kwenye TV.

373
01:02:01,540 --> 01:02:05,400
Safi kuwa juu, Save, na
sasa kwenda hadi scripts.

374
01:02:05,400 --> 01:02:07,500
>> Na sasa, napenda kwenda ya mgambo.

375
01:02:07,500 --> 01:02:09,002
Napenda kuwapa jina.

376
01:02:09,002 --> 01:02:12,440
Mimi nitakuita ouch hii.

377
01:02:12,440 --> 01:02:13,840
Na sasa kucheza ouch sauti.

378
01:02:13,840 --> 01:02:16,520
Taarifa hiyo inaonekana katika
kidogo kushuka chini menu.

379
01:02:16,520 --> 01:02:17,612
Hebu tuone.

380
01:02:17,612 --> 01:02:20,444
>> [Ouch]

381
01:02:20,444 --> 01:02:24,377
>> [LAUGHING]

382
01:02:24,377 --> 01:02:25,835
Lakini tunaweza kubadili t yake juu ya kuruka.

383
01:02:25,835 --> 01:02:28,106
Tunaweza kuwa mara mbili kama annoying.

384
01:02:28,106 --> 01:02:31,760
>> [Ouch]

385
01:02:31,760 --> 01:02:35,332
>> Au kama sisi kufanya hivyo kama
hatua 1,000 katika time--

386
01:02:35,332 --> 01:02:39,900

387
01:02:39,900 --> 01:02:40,670
>> SAWA.

388
01:02:40,670 --> 01:02:42,295
Hivyo sisi ni kwenda kuondoka kwamba moja peke yake.

389
01:02:42,295 --> 01:02:45,290
Hivyo tena, jengo blocks-- mimi
ilianza na kitu super rahisi,

390
01:02:45,290 --> 01:02:47,930
na kisha mimi aliongeza kipengele,
aliongeza kipengele, aliongeza kipengele.

391
01:02:47,930 --> 01:02:50,721
Na mimi tena haja ya kuwa na wasiwasi kuhusu
jinsi ya kwanza ya makala wale

392
01:02:50,721 --> 01:02:53,690
ilikuwa kutekelezwa kama mimi kuendelea
kwa safu mambo juu.

393
01:02:53,690 --> 01:02:55,430
Hivyo kwa kweli, basi mimi kufanya mtu mwingine hapa.

394
01:02:55,430 --> 01:03:00,580
Hebu kwenda mbele na kufungua faili kwamba
Mimi kuletwa mapema, iitwayo kondoo.

395
01:03:00,580 --> 01:03:03,970
>> Hivyo ina tofauti kidogo
tabia kwamba inaonekana kama hii.

396
01:03:03,970 --> 01:03:07,370
Na napenda kuona kama siwezi
kufanya kitu kwa kutumia counter

397
01:03:07,370 --> 01:03:09,310
katika hii case-- kinachojulikana kutofautiana.

398
01:03:09,310 --> 01:03:15,540
Mimi nina kwenda mbele na chini ya Events--
napenda kupata bendera ya kijani clicked.

399
01:03:15,540 --> 01:03:19,030
Kisha napenda kwenda Data, ambayo najua
kutoka tu kucheza karibu kabla,

400
01:03:19,030 --> 01:03:20,214
Hapa ndipo vigezo ni.

401
01:03:20,214 --> 01:03:21,880
Na mimi nina kwenda mbele na Drag hii.

402
01:03:21,880 --> 01:03:25,144
>> Hivyo kutofautiana kuitwa counter, na
Mimi nina kwenda initialize kwa sifuri.

403
01:03:25,144 --> 01:03:27,560
Siwezi kuiita kitu, x au
y au z-- lakini katika programu,

404
01:03:27,560 --> 01:03:30,410
wito kitu katika semantically
muhimu njia, kama counter,

405
01:03:30,410 --> 01:03:34,540
ambayo inaeleza ni nini, ni
rahisi sana kusoma kanuni yako baadaye.

406
01:03:34,540 --> 01:03:37,460
Hebu kwenda mbele na kupata
milele kuzuia hapa.

407
01:03:37,460 --> 01:03:41,289
Na napenda kwenda na inaonekana
ukurasa na kufanya Sema block.

408
01:03:41,289 --> 01:03:44,330
Lakini nini baridi kuhusu vigezo ni mimi
huna aina tu katika kitu

409
01:03:44,330 --> 01:03:47,850
kama hujambo dunia, ambayo tumekuwa tayari
kufanyika, siwezi badala kwenda Data

410
01:03:47,850 --> 01:03:50,690
na Drag kutofautiana yangu, na hata
ingawa sura haina kabisa

411
01:03:50,690 --> 01:03:53,000
kuangalia kama ni lazima fit,
itakua kujaza.

412
01:03:53,000 --> 01:03:58,396
Na mimi itabidi tu kusema counter kwa moja
second-- spoiler-- yeye kwenda kuhesabu.

413
01:03:58,396 --> 01:04:00,380
Tutaweza kusema ni kwa ajili ya pili moja.

414
01:04:00,380 --> 01:04:02,840
Kisha mimi nina kwenda na
kuwa naye kusubiri kwa moja ya pili,

415
01:04:02,840 --> 01:04:04,650
hivyo hana kuhesabu hadi pia kufunga.

416
01:04:04,650 --> 01:04:08,430
Na kisha mwisho, mabadiliko ya kukabiliana na
na one-- kwa maneno mengine,

417
01:04:08,430 --> 01:04:13,520
increment counter kwa moja
thamani ya ziada na kufanya hivyo milele.

418
01:04:13,520 --> 01:04:16,129
>> Hivyo kondoo pia, kama
programu, makosa kutoka 0.

419
01:04:16,129 --> 01:04:20,350

420
01:04:20,350 --> 01:04:23,740
Na kama sisi kusubiri muda wa kutosha,
atafanya hivyo milele.

421
01:04:23,740 --> 01:04:27,740
Lakini si kwamba hasa wa kweli, kwa sababu
kwa kweli, kama tutaweza kugundua katika wiki moja,

422
01:04:27,740 --> 01:04:31,871
integers na kompyuta kwa ujumla zaidi,
kitaalam na tu finite-- vizuri,

423
01:04:31,871 --> 01:04:33,829
badala kompyuta, wakati
wao kuwakilisha integers,

424
01:04:33,829 --> 01:04:35,670
tu kuwa finite idadi ya bits.

425
01:04:35,670 --> 01:04:37,860
Wale balbu mwanga huko
unaweza tu kuhesabu juu mno

426
01:04:37,860 --> 01:04:39,239
kabla uko nje ya balbu mwanga.

427
01:04:39,239 --> 01:04:41,590
Na kompyuta pia,
tu ana kumbukumbu sana,

428
01:04:41,590 --> 01:04:44,640
tu ina transistors wengi,
hivyo inaweza tu kuhesabu juu mno.

429
01:04:44,640 --> 01:04:47,409
>> Hivyo zinageuka kuwa kondoo,
Nadhani, unaweza kuhesabu kwa bilioni 2

430
01:04:47,409 --> 01:04:48,409
au kitu pretty kubwa.

431
01:04:48,409 --> 01:04:50,325
Hivyo sisi siyo kwenda
kusubiri kwa hili kutokea.

432
01:04:50,325 --> 01:04:54,850
Lakini hatimaye baadhi mdudu kitatokea
ambayo yanaweza kuwa na baadhi dunia sana halisi

433
01:04:54,850 --> 01:04:55,970
ramifications.

434
01:04:55,970 --> 01:04:58,861
Lakini zaidi ya kondoo, kwamba
tu utangulizi kutofautiana.

435
01:04:58,861 --> 01:05:01,110
Hebu kwenda mbele na kufungua
kitu mimi alifanya mapema

436
01:05:01,110 --> 01:05:07,430
hapa aitwaye Pet Cat--
Pet Cat zaidi ya hapa.

437
01:05:07,430 --> 01:05:10,420
Na taarifa hapa ni chache
vitalu, lakini wakati kijani bendera

438
01:05:10,420 --> 01:05:12,474
clicked, milele kufanya yafuatayo.

439
01:05:12,474 --> 01:05:15,265
Kama wewe ni kugusa panya
pointer hivyo mshale juu ya screen,

440
01:05:15,265 --> 01:05:18,529
arrow-- kucheza meow sauti
na kisha kusubiri sekunde mbili.

441
01:05:18,529 --> 01:05:19,570
Na tu kufanya hivyo milele.

442
01:05:19,570 --> 01:05:22,619
Tu mara kwa mara kusubiri
ili kuona kama pointer

443
01:05:22,619 --> 01:05:24,710
kama paka ni kugusa pointer.

444
01:05:24,710 --> 01:05:26,060
>> Hivyo mimi kugonga kucheza.

445
01:05:26,060 --> 01:05:26,920
Hakuna kitu kinatokea.

446
01:05:26,920 --> 01:05:28,980
Lakini kama mimi hoja ya mshale juu ya paka,

447
01:05:28,980 --> 01:05:31,960
>> [Meowing]

448
01:05:31,960 --> 01:05:34,750
>> Na kama mimi hoja hiyo mbali, si
kufuga paka tena.

449
01:05:34,750 --> 01:05:38,090
Kwa hiyo baadhi ya mantiki masharti
nested ndani ya kitanzi.

450
01:05:38,090 --> 01:05:43,070
Jinsi kuhusu mfano huu, kwa makusudi
aitwaye Je, si Pet Cat?

451
01:05:43,070 --> 01:05:45,253
Nini hii kwenda kufanya?

452
01:05:45,253 --> 01:05:47,880
>> [Meowing]

453
01:05:47,880 --> 01:05:50,215
>> Kwa nini wewe si pet paka?

454
01:05:50,215 --> 01:05:59,440
>> [Meowing]

455
01:05:59,440 --> 01:06:00,699
>> SAWA.

456
01:06:00,699 --> 01:06:03,880
Hivyo hii ni mfano wa kama mwingine.

457
01:06:03,880 --> 01:06:06,482
Ni hatua uamuzi na
kwa sababu ni wamekaa katika kitanzi,

458
01:06:06,482 --> 01:06:07,690
wao uko wote kupata checked.

459
01:06:07,690 --> 01:06:08,280
Hii ni kweli?

460
01:06:08,280 --> 01:06:08,760
Hii ni kweli?

461
01:06:08,760 --> 01:06:09,250
Hii ni kweli?

462
01:06:09,250 --> 01:06:09,791
Hii ni kweli?

463
01:06:09,791 --> 01:06:11,880
Na hatimaye, mmoja wa
wale ni kwenda kuomba

464
01:06:11,880 --> 01:06:16,480
na hivyo kusikia ama meow au
mngurumo wa simba katika kesi hiyo.

465
01:06:16,480 --> 01:06:21,400
>> Naam, hebu kufanya moja kidogo zaidi dhana
kwamba mimi alifanya mapema too-- nyuzi.

466
01:06:21,400 --> 01:06:25,210
Hivyo thread ni moja tu
Jambo kwamba kompyuta anaweza kufanya.

467
01:06:25,210 --> 01:06:29,349
Hivyo mpango mbalimbali Threaded ni mpango
kwamba wanaweza kufanya mambo mbalimbali kwa mara moja.

468
01:06:29,349 --> 01:06:31,140
Na mifano yote haya
hivi sasa wamekuwa na

469
01:06:31,140 --> 01:06:35,980
script moja tu, hivyo kusema
programu moja kama hii hapa.

470
01:06:35,980 --> 01:06:38,810
Lakini taarifa ya mpango huu ina
mbili sprites, wahusika wawili.

471
01:06:38,810 --> 01:06:40,020
Moja ni ndege.

472
01:06:40,020 --> 01:06:40,870
Moja ni paka.

473
01:06:40,870 --> 01:06:45,080
>> Na taarifa wakati mimi bonyeza hizi chini
kushoto, kila mmoja ana maandiko yao wenyewe

474
01:06:45,080 --> 01:06:47,120
au mipango kuhusishwa na wao.

475
01:06:47,120 --> 01:06:49,420
Na wote wa wale
mipango, ilani, kuanza

476
01:06:49,420 --> 01:06:52,600
na wakati kijani bendera clicked--
hebu tuangalie cat--

477
01:06:52,600 --> 01:06:54,030
wakati kijani bendera clicked.

478
01:06:54,030 --> 01:06:58,220
Na hivyo kweli kweli, wakati mimi kugonga kucheza sasa,
mambo mawili ni kwenda kutokea mara moja.

479
01:06:58,220 --> 01:07:01,750
paka na ndege ni wawili
kwenda kufanya kazi wakati huo huo

480
01:07:01,750 --> 01:07:03,815
kujenga athari hii.

481
01:07:03,815 --> 01:07:05,440
Na unaweza kufikiria nini kinatokea.

482
01:07:05,440 --> 01:07:08,340
Kuna kitanzi na ndege
na paka ni katika kitanzi.

483
01:07:08,340 --> 01:07:11,270
ndege ni bouncing tu kama
Nilikuwa kabla wakati mimi alisema ouch.

484
01:07:11,270 --> 01:07:13,040
Lakini paka wazi ina faida.

485
01:07:13,040 --> 01:07:16,040
Kuna mwingine kuzuia kuhisi
kwamba pointi paka kwa makusudi

486
01:07:16,040 --> 01:07:19,836
kwa ndege katika kesi hii hapa.

487
01:07:19,836 --> 01:07:22,960
Hivyo tunaweza tease mbali, kwa kuangalia
kupitia vitalu wale, nini kinatokea.

488
01:07:22,960 --> 01:07:25,460
Lakini kiungo muhimu hapa ni moja.

489
01:07:25,460 --> 01:07:28,520
ndege, hivyo kwamba mchezo huu si
boring-- kabisa au animation-- hii

490
01:07:28,520 --> 01:07:30,060
kuanza saa mwelekeo random.

491
01:07:30,060 --> 01:07:32,890
Na kompyuta ni kuokota
idadi kati ya 90 na 180

492
01:07:32,890 --> 01:07:36,110
kimsingi, hivyo kwamba ni kidogo
tofauti uhuishaji kila wakati.

493
01:07:36,110 --> 01:07:39,480
>> Na kisha taarifa hapa, kama
paka ni kugusa ndege, basi

494
01:07:39,480 --> 01:07:42,030
kucheza simba wanne sound-- kishindo.

495
01:07:42,030 --> 01:07:46,330
Lakini wakati huo huo katika ndege
palette, tuna hii.

496
01:07:46,330 --> 01:07:49,229
Forever, kama si kugusa paka,
tu kusonga hatua tatu.

497
01:07:49,229 --> 01:07:50,770
Na kisha hapa mwingine kipande puzzle.

498
01:07:50,770 --> 01:07:52,030
Kama wewe ni makali, Bounce.

499
01:07:52,030 --> 01:07:54,840
Hivyo ndege ni aina tu ya
minding biashara yake mwenyewe,

500
01:07:54,840 --> 01:07:57,330
tu kuruka karibu na
bouncing, na kwa kweli ni

501
01:07:57,330 --> 01:08:01,780
paka kwamba alikuwa mantiki masharti
kuamua kama alikuwa hawakupata ndege.

502
01:08:01,780 --> 01:08:02,280
Sawa.

503
01:08:02,280 --> 01:08:08,800
Basi hebu kufanya moja nyingine hapa,
hii moja kuitwa Hi Hi Hi.

504
01:08:08,800 --> 01:08:15,100
Na hii moja hapa tu anafanya
huu katika milele kitanzi.

505
01:08:15,100 --> 01:08:18,925
Lakini notice-- jinsi gani sisi kuacha
huu mpango annoying sana?

506
01:08:18,925 --> 01:08:21,600

507
01:08:21,600 --> 01:08:22,640
Hit bar nafasi.

508
01:08:22,640 --> 01:08:27,990
Kwa sababu kama mimi kufanya hivyo,
mkono wa kushoto program--

509
01:08:27,990 --> 01:08:31,550
taarifa ni daima listening--
ni ufunguo nafasi waandishi wa habari.

510
01:08:31,550 --> 01:08:34,090
Kama nafasi bar taabu,
na kama ni hivyo, ni nini nini?

511
01:08:34,090 --> 01:08:35,980
Ni anafanya mbinu ya kawaida sana.

512
01:08:35,980 --> 01:08:38,590
Unaweka kutofautiana sawa na baadhi ya thamani.

513
01:08:38,590 --> 01:08:39,741
Lakini toggles thamani hiyo.

514
01:08:39,741 --> 01:08:41,490
[? Hivyo kuonekana?]
msingi mimi shape--

515
01:08:41,490 --> 01:08:43,160
kuwa na kutofautiana kwamba mimi
aliandika mapema kuitwa

516
01:08:43,160 --> 01:08:44,770
Kimya, inayosema tu ndiyo au hapana.

517
01:08:44,770 --> 01:08:45,880
Ni sauti kimya au la?

518
01:08:45,880 --> 01:08:46,990
Kweli au uongo?

519
01:08:46,990 --> 01:08:51,580
Na taarifa, mimi kusema Haya kama
kimya ni sifuri, basi mabadiliko kwa moja,

520
01:08:51,580 --> 01:08:53,840
mwingine kuweka bubu kwa sifuri.

521
01:08:53,840 --> 01:08:55,540
Hivyo tu flip thamani kutoka sifuri kwa moja.

522
01:08:55,540 --> 01:08:58,320
Mimi naweza kuwa done-- mabadiliko hayo
2-3 na 3-2

523
01:08:58,320 --> 01:09:00,162
au nne kwa tano au minne hadi sita.

524
01:09:00,162 --> 01:09:01,870
Lakini haijalishi
nini idadi mimi kutumia,

525
01:09:01,870 --> 01:09:04,090
muda mrefu kama mimi kuweka
kubadilisha kinyume.

526
01:09:04,090 --> 01:09:07,290
>> Na wengi programu yoyote ingekuwa tu
kuchagua zero na one-- uongo na kweli,

527
01:09:07,290 --> 01:09:09,510
mbali na on-- kuiwakilisha hii.

528
01:09:09,510 --> 01:09:10,930
Na hii bado ni mbio.

529
01:09:10,930 --> 01:09:12,190
Kama mimi kugonga bar nafasi tena

530
01:09:12,190 --> 01:09:13,590
>> [SEAL SOUNDS]

531
01:09:13,590 --> 01:09:15,440
>> mpango bado ni mbio.

532
01:09:15,440 --> 01:09:18,400
Kwa sababu kuna script hii nyingine
kwamba anasema, milele kufanya yafuatayo.

533
01:09:18,400 --> 01:09:21,390

534
01:09:21,390 --> 01:09:24,770
Kama kutofautiana kimya ni sawa na
zero-- hivyo kama wewe si kimya

535
01:09:24,770 --> 01:09:29,609
ni logic-- ikiwa ni uongo
au hakuna, basi kucheza sauti,

536
01:09:29,609 --> 01:09:30,650
kwa sababu wewe si kimya.

537
01:09:30,650 --> 01:09:33,358
Unapaswa kucheza sauti na kisha
kufikiri hi hi hi kwa sekunde mbili

538
01:09:33,358 --> 01:09:35,790
na kisha kusubiri, na kufanya hivyo
tena na tena na tena.

539
01:09:35,790 --> 01:09:40,760
>> Na hivyo kwa njia hii tuna njia kwa ajili
watu to-- kwa ajili ya programu na kuingiliana.

540
01:09:40,760 --> 01:09:43,120
Na hawana kwa
kuwa kama tarehe kama wengine.

541
01:09:43,120 --> 01:09:46,280
Kwa kweli, poking around--
pun hakuna intended--

542
01:09:46,280 --> 01:09:49,250
mtu alitumia kiasi kubwa ya
muda kwenye mtandao utekelezaji

543
01:09:49,250 --> 01:09:51,580
PokemonGo katika Scratch.

544
01:09:51,580 --> 01:09:55,440
Hata geolocates wewe katika
Cambridge au Allston hapa.

545
01:09:55,440 --> 01:10:03,120
Hivyo kama unataka kuona pia nini watu
unaweza kufanya ni hii orodha dhana sana.

546
01:10:03,120 --> 01:10:04,780
Bonyeza juu hapa.

547
01:10:04,780 --> 01:10:07,430
>> Hii ni mimi na mshale funguo yangu sasa.

548
01:10:07,430 --> 01:10:09,446
Mimi nina kwenda baada ya hii.

549
01:10:09,446 --> 01:10:09,946
Click.

550
01:10:09,946 --> 01:10:12,949

551
01:10:12,949 --> 01:10:14,240
Na sasa wewe click Pokeball.

552
01:10:14,240 --> 01:10:17,130

553
01:10:17,130 --> 01:10:20,260
I mean, nadhani uko
zinatakiwa bonyeza Pokeball.

554
01:10:20,260 --> 01:10:20,760
Sawa.

555
01:10:20,760 --> 01:10:22,680
Hivyo mimi alifanya hivyo.

556
01:10:22,680 --> 01:10:23,950
Siwezi kwenda zaidi ya hapa.

557
01:10:23,950 --> 01:10:27,790
Na mtu huyu kutekelezwa baadhi zaidi
Pokeballs juu here-- Pokeballs tatu.

558
01:10:27,790 --> 01:10:29,950
>> Tutaweza baada ya kiungo kwa hii
online hivyo unaweza kucheza.

559
01:10:29,950 --> 01:10:32,364
Lakini taarifa kuna tu
baadhi ya msingi matofali ya ujenzi.

560
01:10:32,364 --> 01:10:33,780
Inaonekana mengi fancier, na ni.

561
01:10:33,780 --> 01:10:35,905
Hii ni ya kuvutia na zaidi
kuliko sisi ingekuwa kawaida

562
01:10:35,905 --> 01:10:37,740
kutarajia, hakika kwa tatizo kuweka zero.

563
01:10:37,740 --> 01:10:40,809
Mimi sijui ni muda gani
mtu huyu alitumia online.

564
01:10:40,809 --> 01:10:41,850
Lakini zote tu kitanzi.

565
01:10:41,850 --> 01:10:43,180
Kuna sauti kucheza.

566
01:10:43,180 --> 01:10:44,850
Kuna baadhi ya aina ya kitanzi
kusikiliza kwa kama mimi nina

567
01:10:44,850 --> 01:10:47,558
kupiga mshale juu au chini
mshale au kushoto na kulia,

568
01:10:47,558 --> 01:10:49,834
na kisha kama ni hivyo, ni kusonga
ni baadhi ya idadi ya saizi.

569
01:10:49,834 --> 01:10:51,750
Na kisha kama mimi bonyeza
sprite mwingine, kuna

570
01:10:51,750 --> 01:10:53,390
aina fulani ya kama hali pale.

571
01:10:53,390 --> 01:10:54,806
Yeah, hii ni kupata makali mno.

572
01:10:54,806 --> 01:10:56,100
Tunakwenda kuacha.

573
01:10:56,100 --> 01:10:57,750
Ni wale jengo vitalu yote ya msingi.

574
01:10:57,750 --> 01:11:01,530
Hakuna viungo vingine vingine
kuliko wale tumekuwa inaonekana katika tayari.

575
01:11:01,530 --> 01:11:04,670
>> Na hata hapa, napenda kufanya
moja ya mwisho seti ya mifano

576
01:11:04,670 --> 01:11:06,960
kwamba inajenga picha pia
ya nini unaweza kufanya hapa.

577
01:11:06,960 --> 01:11:10,481
Hapa ni mpango rahisi sana kwamba
tu anafanya Haya kukohoa, kikohozi, kikohozi.

578
01:11:10,481 --> 01:11:12,480
Na msingi tu juu ya kile
tumekuwa inaonekana katika hivi sasa,

579
01:11:12,480 --> 01:11:14,570
ambapo ni dhahiri
nafasi ya kuboresha.

580
01:11:14,570 --> 01:11:15,570
Mpango huu ni sahihi.

581
01:11:15,570 --> 01:11:17,980
Ni mafua mara tatu,
ambayo ni nini mimi yaliyokusudiwa.

582
01:11:17,980 --> 01:11:19,650
Lakini ni hafifu kutekelezwa.

583
01:11:19,650 --> 01:11:20,600
Ni vibaya iliyoundwa.

584
01:11:20,600 --> 01:11:22,000
Kwa nini?

585
01:11:22,000 --> 01:11:22,500
Yeah.

586
01:11:22,500 --> 01:11:23,230
Siyo kitanzi.

587
01:11:23,230 --> 01:11:24,610
Na si sana
kwamba siyo kitanzi,

588
01:11:24,610 --> 01:11:26,400
ni kwamba kuna mengi ya redundancy.

589
01:11:26,400 --> 01:11:28,830
Kuna ni kunakiliwa na
kubandikwa kificho, hivyo kusema.

590
01:11:28,830 --> 01:11:31,830
Na ufumbuzi pengine
ni kweli kitanzi.

591
01:11:31,830 --> 01:11:34,350
Hivyo basi mimi kwenda mbele
na kuboresha juu kwamba.

592
01:11:34,350 --> 01:11:36,250
Na mimi nina kwenda kwa Drag hizi zaidi ya hapa.

593
01:11:36,250 --> 01:11:39,986
Hebu kwenda mbele na kupata kurudia
kuzuia, kubadili hali hii kwa tatu.

594
01:11:39,986 --> 01:11:41,860
Mimi nina kwenda kutupa mbali
baadhi ya vitalu hizo.

595
01:11:41,860 --> 01:11:43,150
>> Na wewe utakuwa taarifa ni pretty Intuitive.

596
01:11:43,150 --> 01:11:45,691
Wewe Drag na kuacha na mambo
kuonekana na kutoweka hatimaye.

597
01:11:45,691 --> 01:11:49,170
Na siwezi Drag tu hii hapa, na
sasa nina safi version bado.

598
01:11:49,170 --> 01:11:50,730
Lakini unajua nini?

599
01:11:50,730 --> 01:11:52,940
Kuna fursa hii
sasa kwa abstraction--

600
01:11:52,940 --> 01:11:56,350
kuanza kufafanua msamiati mpya
kwamba MIT Hawakutarajia.

601
01:11:56,350 --> 01:11:59,110
Kuna kusubiri na kurudia
na hata milele na kama,

602
01:11:59,110 --> 01:12:02,590
lakini kile kama nataka kuanzisha
neno kikohozi kama block?

603
01:12:02,590 --> 01:12:06,230
Nini kama nataka puzzle kipande
ambao lengo katika maisha ni kukohoa?

604
01:12:06,230 --> 01:12:10,720
>> Naam, hebu tuangalie hili toleo
hapa, ambayo mimi alifanya kama ifuatavyo.

605
01:12:10,720 --> 01:12:13,579
Magically, mimi tumemuumba
hii kipande puzzle hapa,

606
01:12:13,579 --> 01:12:14,870
ambayo Scratch inaruhusu kufanya.

607
01:12:14,870 --> 01:12:16,787
Na hakika C na Python
na JavaScript ni

608
01:12:16,787 --> 01:12:18,370
kwenda kuruhusu wewe kufanya hili pia.

609
01:12:18,370 --> 01:12:21,830
Unaweza kuunda yako mwenyewe desturi
vipande kwamba wewe piga unataka nini.

610
01:12:21,830 --> 01:12:24,890
Katika kesi hiyo, kikohozi anahisi
kama ufafanuzi nafuu.

611
01:12:24,890 --> 01:12:27,880
Na kisha kwa vipande hayo chini
hapa unaweza kufafanua nini maana yake.

612
01:12:27,880 --> 01:12:30,290
>> Mimi kuburuzwa na imeshuka kutoka
palette hii here-- zaidi

613
01:12:30,290 --> 01:12:33,500
blocks-- hii kubwa zambarau
kuzuia, ambapo mimi typed katika kikohozi

614
01:12:33,500 --> 01:12:35,290
kama jina la mpya puzzle kipande yangu.

615
01:12:35,290 --> 01:12:39,920
Na kisha mimi kusema wakati wowote user
wito huu mpya kikohozi puzzle kipande,

616
01:12:39,920 --> 01:12:41,770
kufanya kusema na kusubiri.

617
01:12:41,770 --> 01:12:46,160
Na hivyo hapa katika kuzuia yangu kurudia,
Siwezi tu kikohozi mara tatu.

618
01:12:46,160 --> 01:12:49,972
>> Na napenda wanasema, hasa
kama sasa wewe kujificha kwa undani hii.

619
01:12:49,972 --> 01:12:51,430
Nani anayejali jinsi kikohozi ni kutekelezwa?

620
01:12:51,430 --> 01:12:54,390
All I huduma ya juu kama
programu kwamba naweza kikohozi.

621
01:12:54,390 --> 01:12:56,280
Sijali jinsi kusema ni kutekelezwa.

622
01:12:56,280 --> 01:12:58,620
I just huduma ya kwamba
paka inaweza kusema kitu.

623
01:12:58,620 --> 01:13:02,720
Naweza abstract mbali kwamba kwa undani na
lengo tu juu ya nini juu ya screen hapa.

624
01:13:02,720 --> 01:13:04,400
Lakini siwezi kuchukua hatua hii moja zaidi.

625
01:13:04,400 --> 01:13:08,070
>> Taarifa kwamba hapa, nina
kutekelezwa kitanzi mara tatu.

626
01:13:08,070 --> 01:13:11,560
Lakini nini kama badala mimi kunyakua toleo hili?

627
01:13:11,560 --> 01:13:14,640
Na nini kama badala
katika toleo hili hapa,

628
01:13:14,640 --> 01:13:18,730
I just mabadiliko puzzle yangu kipande kuchukua
Hoja na pembejeo kwa yenyewe?

629
01:13:18,730 --> 01:13:21,100
Na kwamba pembejeo inaweza kuwa
idadi kama tatu.

630
01:13:21,100 --> 01:13:24,580
Hivyo sasa, kama mimi kuandika mpango
na mimi nataka paka na kikohozi,

631
01:13:24,580 --> 01:13:28,270
Mimi kweli anaweza kuwaambia puzzle
kipande mara ngapi na kikohozi,

632
01:13:28,270 --> 01:13:31,990
kwa sababu chini hapa, fancier
toleo la hivi vipande desturi puzzle

633
01:13:31,990 --> 01:13:34,500
lets me bayana kwamba
kikohozi kweli inachukua

634
01:13:34,500 --> 01:13:36,951
pembejeo inachukua hoja kama hii.

635
01:13:36,951 --> 01:13:37,700
Na unajua nini?

636
01:13:37,700 --> 01:13:38,890
Labda mimi kutambua, kusubiri dakika.

637
01:13:38,890 --> 01:13:40,680
Kukohoa ni same--
ni kimsingi

638
01:13:40,680 --> 01:13:42,120
jambo moja na kupiga chafya.

639
01:13:42,120 --> 01:13:44,040
Ni tu tofauti
neno juu ya screen.

640
01:13:44,040 --> 01:13:46,550
Naweza abstract mbali
zaidi na kutekeleza

641
01:13:46,550 --> 01:13:48,750
hii toleo la mwisho la
kikohozi, ambayo katika mtazamo wa kwanza

642
01:13:48,750 --> 01:13:50,660
ni njia ngumu zaidi kuangalia.

643
01:13:50,660 --> 01:13:52,140
Lakini taarifa ya nini mimi tumefanya.

644
01:13:52,140 --> 01:13:55,930
Nina sasa generalized-- genericized
really-- hii kipande puzzle

645
01:13:55,930 --> 01:13:59,900
kuitwa kusema neno n nyakati.

646
01:13:59,900 --> 01:14:04,410
>> Na sasa nina mbili vipande mpya puzzle
chini hapa kufafanua kikohozi n nyakati.

647
01:14:04,410 --> 01:14:06,790
Na je kikohozi kazi nini?

648
01:14:06,790 --> 01:14:08,420
Je desturi yangu puzzle kipande nini?

649
01:14:08,420 --> 01:14:11,996
Ni tu wito kuzuia kusema,
kupita katika neno nataka kusema,

650
01:14:11,996 --> 01:14:13,870
kupita katika idadi
ya nyakati nataka kusema.

651
01:14:13,870 --> 01:14:18,210
Kwa sababu sasa siwezi kutekeleza
kuchafya kwa kifupi akisema Achoo,

652
01:14:18,210 --> 01:14:20,320
katika kesi hii, baadhi idadi ya nyakati.

653
01:14:20,320 --> 01:14:22,360
>> Na hivyo mimi nina layering na layering.

654
01:14:22,360 --> 01:14:25,690
Na tena, muhimu hapa ni si
jinsi mimi kutekelezwa yake, lakini ukweli

655
01:14:25,690 --> 01:14:28,070
kwamba kama mimi tu literally
hoja ya hizi mbali screen,

656
01:14:28,070 --> 01:14:31,280
kuangalia jinsi rahisi kama sio
pretty mpango wangu sasa inaonekana.

657
01:14:31,280 --> 01:14:33,930
Kwa sababu ni anafanya nini
anasema, nimekuwa yanayotumika

658
01:14:33,930 --> 01:14:37,640
mbali lililo ndani ya kwamba sanduku nyeusi.
hutokea kwa kuwa zambarau sanduku hapa,

659
01:14:37,640 --> 01:14:41,430
lakini nimekuwa pingamizi mbali nini ndani
kwa sababu mimi sijali jinsi kazi.

660
01:14:41,430 --> 01:14:43,650
Mimi tu huduma sasa kwamba ni kazi.

661
01:14:43,650 --> 01:14:46,375
>> Na hakika, katika tatizo
kuweka zero, hii ni hasa

662
01:14:46,375 --> 01:14:49,250
aina ya layering wa mawazo utasikia
kuwa na nafasi ya kuchunguza.

663
01:14:49,250 --> 01:14:53,510
Ni hasa nafasi ya
kuomba kutatua tatizo mbinu,

664
01:14:53,510 --> 01:14:55,550
kwa nini pengine
usio wa kawaida mazingira.

665
01:14:55,550 --> 01:14:57,890
Na kama umefanya si iliyowekwa
kabla au iliyowekwa mbele,

666
01:14:57,890 --> 01:14:59,500
utapata kwamba kuna
kitu kidogo

667
01:14:59,500 --> 01:15:00,874
katika mazingira haya kwa kila mtu.

668
01:15:00,874 --> 01:15:02,770
Na kwa tatizo kuweka
moja katika muda wa wiki,

669
01:15:02,770 --> 01:15:06,630
tutaweza kuwa na kuelekeza nguvu zilianza kwa
juu ya lugha kiwango cha juu aitwaye

670
01:15:06,630 --> 01:15:09,290
C-- au tuseme chini
Lugha ngazi inayoitwa

671
01:15:09,290 --> 01:15:11,347
C-- hiyo ni hata zaidi
nguvu, hata kama ni

672
01:15:11,347 --> 01:15:12,930
kidogo cryptic zaidi katika mtazamo wa kwanza.

673
01:15:12,930 --> 01:15:16,740
>> Na wewe utakuwa kutambua per TL leo: DR,
kwamba tatizo hili kuweka ina mfupi

674
01:15:16,740 --> 01:15:19,880
dirisha la muda zaidi kuliko wale siku zijazo, tu
kwa sababu unapaswa kupata hiyo haki

675
01:15:19,880 --> 01:15:20,420
kupatikana.

676
01:15:20,420 --> 01:15:22,211
Na si kuwa na wasiwasi kama
wewe kuongeza darasa marehemu.

677
01:15:22,211 --> 01:15:23,920
Tutaweza kushughulikia kwamba kabla ya muda mrefu.

678
01:15:23,920 --> 01:15:28,480
Na kabla ya sisi kuahirishwa kwa keki, hebu
kumaliza na tu dakika mbili kuangalia

679
01:15:28,480 --> 01:15:30,500
nini zakulaiki hapa katika CS50.

680
01:15:30,500 --> 01:15:40,950

681
01:15:40,950 --> 01:17:20,803
[Music kucheza]

682
01:17:20,803 --> 01:17:21,302
Sawa.

683
01:17:21,302 --> 01:17:22,690
Hiyo ni kwa CS50.

684
01:17:22,690 --> 01:17:23,650
Tutaona hivi karibuni.

685
01:17:23,650 --> 01:17:25,526
Keki ni sasa aliwahi.

686
01:17:25,526 --> 01:17:28,998

687
01:17:28,998 --> 01:18:14,267
[Music kucheza]

688
01:18:14,267 --> 01:18:16,350
SPIKA 17: Je, habari
ya Sabato, Chief?

689
01:18:16,350 --> 01:18:29,490

690
01:18:29,490 --> 01:18:31,920
SPIKA 18: Labda kuna
zaidi chini ya kofia.

691
01:18:31,920 --> 01:18:38,279