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[Powered by Google Translate] [♪ ♪ buzzing]

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Hivyo kuanzisha wewe kile Mimi nimepata up kwenye screen;

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ni moja ya zana sisi maendeleo juu ya jua;

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ni kuitwa CS50 Spaces,

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na ni coding yetu shirikishi ya maombi

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kwamba sisi ni kwenda kutumia katika sehemu.

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Ni pretty cool.

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Je yoyote ya wewe kuonekana CS50 kukimbia bado?

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Ngoja nikuondoe kuwa hadi katika tabo nyingine.

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Run.cs50.net

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Hivyo

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kama kwenda kwa run.cs50.net,

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unaweza kuona hii ni katika njia browser yako

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kweli code - kuandika C kificho,

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na kisha kukimbia,

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hivyo wote inaandaa yake, anaendesha, basi anarudi pato na wewe,

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hivyo hii ni aina ya njia ya baridi kwa majaribio

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na baadhi ya kificho kwamba huenda juu ya Daudi katika mihadhara

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na sisi kutoa kwa juu yenu juu ya seti tatizo

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bila hasa moto hadi appliance.

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>> Basi nini Spaces gani kwamba ni tofauti na ile

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kama mimi kubadili nyuma kwa tab hii,

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Spaces ni CS50 kukimbia, kama unaweza kuona hapa hapa,

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lakini kama sisi kitabu juu na kuangalia upande mwingine wa dirisha,

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unaweza kuona haki mimi nina mtu tu katika nafasi hii,

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lakini kile Mimi naenda kufanya ni kuuliza wewe guys kujiunga hii Space na mimi

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na wote tutaweza kupata code katika dirisha moja kidogo,

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kushiriki kificho na kila mmoja,

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na majadiliano juu ya tofauti kati ya code yetu.

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Hivyo ni aina ya kitu baridi -

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hivyo kujiunga, kama ungependa kutembelea kiungo hiki hapa hapa kwa juu

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kwamba nimepata yalionyesha,

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unaweza tu aina katika apps.cs50.net/spaces/vqcspSnO.

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>> Haki ya wote, hivyo kuanza mbali,

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Mimi naenda kukupa kidogo ya ziara ya hii.

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Sisi ni gonna kufanya baadhi silly coding kidogo na ni mara ya kwanza,

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hivyo tu kwamba kila mtu anapata kinda kujisikia kwa nini ni kama,

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lakini kile nimepata kufanyika -

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au nini mimi kuhusu kufanya haki hapa ni -

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Mimi naenda kuchukua kificho kwamba nimepata yaliyoandikwa katika hapa,

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ambayo kama unaweza kuona sasa hivi ni tupu;

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haina kufanya kitu chochote.

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Ni tu boiler sahani code, tutaweza simu yake.

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Na kidogo-nini maoni.

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Mimi naenda kuokoa ni kwa kupiga button hii Save.

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Na nini kwamba hana ni

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yalionyesha it up hapa kwa ufupi - kwamba marekebisho ila kijani sanduku,

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na sasa, kama wewe tafuta kwa ajili yangu katika Space,

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ukibonyeza jina langu,

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unaweza kuona kwamba mimi nimepata hii marekebisho haki hapa,

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na kama wewe bonyeza marekebisho kwamba,

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utakuwa mzigo kwamba code katika Space yako, pia.

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>> Hivyo ina kila mtu kubeba kwamba code katika Space zao?

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Haki zote, kama una bado, kwenda mbele na kufanya hivyo,

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na kisha nini nataka wewe guys kufanya katika hiki kidogo kwa-nini sehemu

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ni kuandika kidogo kutumia printf kuhusu wewe mwenyewe,

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hivyo kwa mfano, napenda kuandika

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printf ("Jina langu ni Nate");

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na kisha Ningependa kuandika

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"Mimi kufuzu katika 2009

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kutoka Stanford "

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na upendo Ningependa kusikia kuhusu

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mwaka gani wewe ni katika shule,

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kama wewe ni katika chuo au shule ya biashara

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au nyingine Harvard shule,

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nini wewe kusoma kama ni anajulikana bado;

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kama si inajulikana, kwamba ni kabisa cool.

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Sikuweza kuamua mpaka mimi nilikuwa marehemu katika sophomore mwaka wangu.

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na basi napenda pia upendo na kujua

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chochote mambo unataka kuniambia au

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kitu kuhusu darasa au tu kitu kingine chochote.

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Wakati wewe ni kufanyika kwa kuandika kwamba printf wako mdogo,

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kama wewe utakuwa kuokoa marekebisho au tuseme

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kwanza kuhakikisha kwamba unaweza kukimbia

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na kwamba Prints nje hasa unataka kwa magazeti nje,

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na kisha kama wewe kwenda mbele na kuokoa kwamba marekebisho

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kutumia Revision Save button, hii kwanza kidogo guy zaidi ya hapa,

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na tutaweza kinda kupitia na kufanya utangulizi kidogo kwa njia hiyo.

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Hivyo unapaswa tu hit button Play,

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ambayo ni hapa juu upande wa kushoto juu,

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hivyo hii kifungo Play juu ya upande wa juu kushoto mapenzi

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kutuma code yako mbali na server yetu ambapo anapata compiled na kisha kukimbia.

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Basi nini kinda mambo kuhusu hii

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code hii kwa kweli si mbio kwenye kompyuta yako;

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ni kweli kuwa alimtuma katika mtandao.

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>> Jinsi ambacho ni kwenda, Charlotte?

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>> Mimi - sawa. I'm - nadhani mimi nina

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Baada ya matatizo ya kuuhifadhi

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kwenye server kwamba vile inaweza - naweza kuendesha programu.

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Na kisha wakati mimi kujaribu kukimbia, inasema kwamba kuna makosa.

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Alitangaza kama virusi, ambayo si katika humo tena.

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Oh, hebu angalia; unaweza hit Ila tena?

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Mimi naona ni juu ya screen.

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>> Haki, sawa, hivyo kwamba ni nini nina.

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Na sijui ni kwa nini haitaki kuniachia kukimbia.

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Oh, sawa, sorry.

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Je, unaweza kueleza kwa nini - nini ilikuwa na makosa - nini haikuwa kazi kwa hayo?

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>> Yeah, kwa sababu sikuweza kuona kwamba kulikuwa mstari wa mwisho ambapo bado kuna kutofautiana

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kwamba mimi hawakutangaza, ambayo sikuwa na nia kwa kuwa huko.

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Yeah, kamilifu!

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>> Sasa kama mimi ila it, nadhani ni lazima kazi.

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Sasa kwa kuwa umehifadhi hilo, ni kazi; kutisha.

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>> Hivyo yeah, kama sisi kwenda kwa njia ya -

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hivyo kile kinachoendelea,

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Mimi tu anaenda repeat hii kwa kamera.

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Kile kinachotokea ni kwamba hii variable s

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akabaki katika baada ya - mimi kudhani wewe ilifutwa baadhi ya mambo mengine

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ambapo wewe kama alitangaza,

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na hivyo hii ilikuwa kutupa mambo mbali na wala hakuwa na kuruhusu wewe kukimbia.

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Hivyo hii ni nini hasa tunataka kufanya katika sehemu

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ni kuwa watu jaribu kuandika vipande mbalimbali ya kificho,

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kuandaa hiyo, kuona kazi gani, kuona nini hana,

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na kisha kinda majadiliano kuhusu mambo haya, kwa sababu hizi ni tripping pointi kwamba

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Mimi bado kukutana,

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Mimi bado - I kufanya kura ya mambo silly wakati wote,

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na sijui nini haifanyi kazi,

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hivyo hebu vuta hadi marekebisho Charlotte wa 3,

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na tutaweza kukimbia.

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>> Hivyo wakati mimi kukimbia, sasa kwamba mimi nimepata code yake katika hapa,

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Mimi wanaweza kuvuta, hit button Run,

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uploads yake, hujenga yake, anaendesha hiyo,

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anasema ni mbio kwa mafanikio, na kama mimi kitabu chini,

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kuona Charlotte ni junior katika Adams House,

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saikolojia, sekondari katika uchumi; kutisha.

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Kubwa kukutana na wewe!

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Ajabu.

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Okay, kusonga, hebu nenda Danieli,

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kwenda marekebisho 3,

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kukusanya, kukimbia;

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kwa nini wewe kutuambia kidogo kuhusu wewe mwenyewe, Danieli?

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>> Niitie Dani.

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Mimi nina kwenda shule ya biashara hela kutoka guys,

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na mimi nilikuwa katika majini kabla ya hapa,

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na hii yote ni mpya kwangu, hivyo yeah.

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Je, si kujisikia vibaya, mimi nina 30 na sijui yoyote ya mambo haya.

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Ajabu; shukrani, Dan!

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Haki zote, sisi got mwingine Daniel.

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Unaweza kwenda na Daniel - wewe kuanzisha mwenyewe, Daniel?

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>> >> Hakika, mimi nina Daniel.

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Mimi nina sophomore katika Mather hivi sasa.

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Mimi nina kuzingatia serikali,

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lakini nilitaka kuchukua CS50 sababu Nimesikia kitaalam kubwa juu ya darasa

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na sijawahi walijaribu CS kabla.

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Kitabu chini hapa na kuonyesha hii - cool.

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Kuhama, Yaredi.

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Jinsi ambacho ni kwenda?

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>> Bora, habari gani?

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Kama unaweza kuona, mimi nina junior falsafa concentrator katika Eliot,

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awali kutoka kusini mwa California,

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na mimi nina nia ya kuchukua CS50 sababu mimi kama mantiki hiyo,

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na inaonekana kweli cool kufanya mambo juu ya kompyuta, hivyo.

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Ajabu; ambapo katika kusini mwa California ni wewe?

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>> Kuhusu saa kutoka [inaudible], mji mdogo [inaudible].

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Oh, yeah, baba yangu ni kutoka Redlands.

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Cool stuff.

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>> Haki zote, Jimmy; jinsi ambacho ni kwenda, Jimmy?

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>> Bora, habari gani?

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Kufanya pretty vizuri!

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Tueleze kuhusu wewe mwenyewe.

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>> Mimi nina Freshman, na mimi nina uhakika kabisa nini mimi majoring katika

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lakini nina kinda leaning kuelekea uchumi.

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Kama Danieli mbele yangu, sijawahi kufanyika yoyote CS, lakini inaonekana kinda cool.

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Mimi nina awali kutoka Chicago.

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Ajabu. Ili kuangalia nje ya printout yake hapa.

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Nilitaka kuuliza, alifanya hivyo magazeti nje kama ilivyotarajiwa?

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>> Hapana, I forgot magazeti mstari mpya.

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Mimi kwa kweli wamesahau kwamba wakati mimi nilikuwa kuandika kitu wangu

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kwa mara ya kwanza, pia.

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Ni aina ya maumivu ya kukumbuka kuweka wale katika manually.

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Ni d kuwa nzuri kama tu kujua kwamba ni nini alitaka.

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>> Okay, Kelly.

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Wow, tuna Kellys 2; 2 Daniels, 2 Kellys.

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Hivyo Kelly - wala kwenda na Kelly Ren?

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Okay, kutisha.

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Au Kelly, I mean.

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>> Hivyo yeah, hivyo mimi nina Kelly.

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Mimi nina sophomore katika Pfoho.

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I got barua pepe leo kwamba bado nina 7 wiki kutangaza ukolezi yangu,

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hivyo mimi nina kujaribu kufikiri kuhusu hilo,

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na mimi kama kuoka, kukimbia, na Craisins.

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Sina uzoefu na zaidi ya CS;

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Mimi mwenyewe alifundisha kujenga maeneo Mtandao wakati mimi kwa kweli alikuwa kijana,

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lakini mimi nadhani pengine kufundishwa mwenyewe makosa mengi ya nyakati.

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Hopefully mimi itabidi kujifunza kidogo zaidi

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na - yeah.

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>> Ajabu; vizuri, asante.

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Hebu kwenda Kelly mengine;

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Sina kitu chochote - je kusema kitu hapa?

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>> [Inaudible]

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Kuna ni!

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Tamu!

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>> Sawa, hivyo mimi nina Kelly.

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Mimi nina mwaka wa kwanza ya kuhitimu mwanafunzi.

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Mimi nina majoring katika akili, Elimu Brain, na.

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Mimi kufuzu katika Franklin & Marshall College katika 2008

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na majors katika saikolojia na sosiolojia

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na madogo katika Kifaransa.

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Mimi kuchukua CS50

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kwa sababu mimi nina nia ya kupata PhD katika Sayansi ya niurolojia

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na mimi kuhisi kama hii itasaidia mimi kuelewa teknolojia iliyotumika.

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Ajabu.

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Kuhama, Mikaela.

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Ni kwamba matamshi sahihi?

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Okay, kutisha.

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>> >> Mimi nina Mikhaila.

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Mimi nina sophomore katika Kirkland House,

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na mimi nina kuzingatia katika Mechanical Engineering.

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Mimi kwa kweli kama baiskeli, kujengwa baiskeli huu majira.

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Mimi kuchukua CS, kwa kweli,

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kama mahitaji ya ukolezi,

211
00:10:48,350 --> 00:10:52,550
lakini unajua, mimi nadhani ni bado baridi aina ya darasa uhandisi.

212
00:10:52,550 --> 00:10:55,150
Kutisha - wewe kujengwa baiskeli huu majira?

213
00:10:55,150 --> 00:10:56,730
>> Yeah.

214
00:10:56,730 --> 00:10:58,900
Wow, kama frame na yote hayo?

215
00:10:58,900 --> 00:11:00,120
>> Uh-hunh (chanya).

216
00:11:00,120 --> 00:11:01,530
Wow, kwamba ni kweli cool.

217
00:11:01,530 --> 00:11:06,370
>> [Inaudible mbali-kamera mazungumzo]

218
00:11:06,370 --> 00:11:10,000
[Kicheko]

219
00:11:12,640 --> 00:11:14,200
Yeah, ni kuwa muda mrefu.

220
00:11:14,200 --> 00:11:16,730
Huwezi kujua, sawa?

221
00:11:16,730 --> 00:11:19,420
Naam, baridi; vizuri shukrani, Mikhaila.

222
00:11:19,420 --> 00:11:21,390
>> Haki zote, Missy.

223
00:11:21,390 --> 00:11:23,280
>> Jina langu Missy; mimi nina Freshman,

224
00:11:23,280 --> 00:11:25,500
hivyo kwamba maana mimi sijui kitu chochote!

225
00:11:25,500 --> 00:11:29,180
Nataka makini katika astrofysik.

226
00:11:29,180 --> 00:11:31,220
Katika CS50,

227
00:11:31,220 --> 00:11:33,350
Najisikia kama dhahiri kusaidia na kwamba.

228
00:11:33,350 --> 00:11:37,750
ukweli isiyo ya kawaida kuhusu mimi ni mimi nina firefighter kitaifa kuthibitishwa.

229
00:11:37,750 --> 00:11:39,960
Wow!

230
00:11:39,960 --> 00:11:42,440
Hiyo ilitokeaje?

231
00:11:42,440 --> 00:11:45,570
>> Mimi walihudhuria academy

232
00:11:45,570 --> 00:11:49,000
akaenda kwa njia ya Jahannamu kwa mengi ya wiki

233
00:11:49,000 --> 00:11:51,200
na got vyeti yangu.

234
00:11:51,200 --> 00:11:54,090
Wow, Hongera!

235
00:11:54,090 --> 00:11:57,280
Kwamba hakuna feat ndogo, kwa uhakika.

236
00:11:57,280 --> 00:11:59,070
Sawa, hivyo sasa tutaweza kufanya mimi.

237
00:11:59,070 --> 00:12:01,290
Mimi nina moja ijayo katika mfululizo.

238
00:12:01,290 --> 00:12:04,510
I'm - kukimbia.

239
00:12:04,510 --> 00:12:07,580
>> Hivyo jina langu ni Nate.

240
00:12:07,580 --> 00:12:11,160
Mimi nilikuwa darasa la 2009 saa Stanford.

241
00:12:11,160 --> 00:12:13,840
Mimi nilikuwa Systems Ishara kubwa,

242
00:12:13,840 --> 00:12:17,370
ambayo ni sawa na akili, ubongo ukolezi, Tabia hapa,

243
00:12:17,370 --> 00:12:19,300
lakini ni aina ya mchanganyiko wa

244
00:12:19,300 --> 00:12:22,350
sayansi ya kompyuta, lugha, saikolojia, na falsafa.

245
00:12:22,350 --> 00:12:26,600
Aina ya - yeah, mengi ya mambo weird, lakini ilikuwa ni kubwa,

246
00:12:26,600 --> 00:12:29,880
na kisha mimi bwana wangu katika Sayansi ya Kompyuta huko, kama vile.

247
00:12:29,880 --> 00:12:33,250
Hivyo mimi nina mpya Harvard mwaka huu.

248
00:12:33,250 --> 00:12:35,750
Mimi kwa kweli alitaka kupata katika ufundishaji.

249
00:12:35,750 --> 00:12:39,860
Mimi alitumia miaka 4 iliyopita saa Stanford TA-ing madarasa ya Sayansi ya Kompyuta

250
00:12:39,860 --> 00:12:43,370
na hivyo Daudi basi mimi kuja juu,

251
00:12:43,370 --> 00:12:45,550
na mimi nina gonna kuwa kusaidia nje kwa CS50,

252
00:12:45,550 --> 00:12:47,890
hivyo mimi kufanya hili wakati kamili; mimi si katika shule grad.

253
00:12:47,890 --> 00:12:50,330
Imekuwa ni furaha.

254
00:12:50,330 --> 00:12:53,130
Nadhani itabidi kuendelea kuwa fun; mimi nina uhakika itakuwa.

255
00:12:53,130 --> 00:12:56,040
>> Haki zote, Sam.

256
00:13:01,910 --> 00:13:05,470
>> Jina langu ni Sam, mimi nina sophomore katika chuo, katika sheria maalum.

257
00:13:05,470 --> 00:13:10,110
Kubwa yangu itakuwa historia ya sayansi, pengine, na Ves sekondari,

258
00:13:10,110 --> 00:13:13,240
na rangi yangu favorite ni njano.

259
00:13:18,790 --> 00:13:21,100
Hakuna haja ya kupitisha hukumu au kitu chochote, lakini ni rangi nzuri!

260
00:13:21,100 --> 00:13:24,780
Na Stella.

261
00:13:24,780 --> 00:13:26,980
>> Hi, mimi nina Stella; mimi nina Freshman katika Grays.

262
00:13:26,980 --> 00:13:30,070
Mimi kuwa hakuna kidokezo kile nimepata kujilimbikizia katika bado,

263
00:13:30,070 --> 00:13:32,500
hivyo CS50 mara tu aina ya random,

264
00:13:32,500 --> 00:13:34,220
ambayo ni ya kuvutia.

265
00:13:34,220 --> 00:13:36,080
Furaha kweli, Jimmy alikuwa wa kwanza Harvard rafiki yangu,

266
00:13:36,080 --> 00:13:38,360
kwa sababu sisi ni wote kutoka Chicago.

267
00:13:38,360 --> 00:13:42,450
Baridi, na Grace - kwamba walidhani kuwa moja kweli nice, haki?

268
00:13:42,450 --> 00:13:45,220
>> Nilidhani [inaudible].

269
00:13:45,220 --> 00:13:46,690
Oh, yeah.

270
00:13:46,690 --> 00:13:51,210
[Inaudible / off-kamera mazungumzo]

271
00:13:51,210 --> 00:13:54,420
Sawa; mimi bado kujifunza, bado kujifunza.

272
00:13:54,420 --> 00:13:57,800
>> Hivyo sisi tumepewa kitu kingine kwamba ni aina ya kuvutia hapa.

273
00:13:59,600 --> 00:14:02,870
Yeah, mimi nina wanashangaa tu, je, una wazo kwamba kinaendelea hapa?

274
00:14:02,870 --> 00:14:05,890
Unajua jinsi ya kutafsiri hii?

275
00:14:05,890 --> 00:14:13,340
>> Mimi ilitakiwa kuwekwa semicolon baada ya mstari kila moja.

276
00:14:13,340 --> 00:14:16,370
Hiyo ni aina ya maumivu.

277
00:14:16,370 --> 00:14:19,100
Wakati mwingine wale semicolons inaweza kuwa maumivu ya kweli, na kufuatilia chini.

278
00:14:19,100 --> 00:14:21,420
Hivyo ni zinageuka kuwa

279
00:14:21,420 --> 00:14:22,820
mpango maalum sisi ni kutumia mwaka huu kwa

280
00:14:22,820 --> 00:14:26,670
kukusanya wetu C code inaitwa Clang,

281
00:14:26,670 --> 00:14:29,460
na sababu tumeanza kutumia Clang mwaka huu -

282
00:14:29,460 --> 00:14:32,030
kwa sababu sisi si kutumika kwamba mpango katika kipindi,

283
00:14:32,030 --> 00:14:35,710
tumekuwa kutumika mwingine mmoja aitwaye GCC hiyo kwa kweli maarufu -

284
00:14:35,710 --> 00:14:38,420
Clang kweli anakupa ujumbe wa makosa kwamba mantiki.

285
00:14:38,420 --> 00:14:41,420
Hii moja anasema "inatarajiwa ';' baada ya kujieleza",

286
00:14:41,420 --> 00:14:45,260
na hata anakwambia kujieleza baada ambayo inahitajika semicolon.

287
00:14:45,260 --> 00:14:47,830
Hivyo ni wewe fixing?

288
00:14:47,830 --> 00:14:48,930
>> Yeah, sasa hivi.

289
00:14:48,930 --> 00:14:52,040
Ajabu; napenda kujua na tutaweza kuvuta it up, na tutaweza kukimbia.

290
00:14:52,040 --> 00:14:55,830
Lakini yeah, kuweka semicolons hizi katika ni aina ya maumivu.

291
00:14:55,830 --> 00:14:59,580
>> Mimi fasta hivyo, hivyo nadhani ni lazima kazi.

292
00:14:59,580 --> 00:15:02,760
Kutisha - marekebisho 3.

293
00:15:02,760 --> 00:15:05,250
Kwamba inaonekana kama ni.

294
00:15:05,250 --> 00:15:08,580
Haki zote, hivyo sasa kama sisi kukimbia,

295
00:15:08,580 --> 00:15:11,020
kuna unaendelea.

296
00:15:11,020 --> 00:15:13,830
Cool stuff.

297
00:15:13,830 --> 00:15:15,340
>> Wote haki.

298
00:15:15,340 --> 00:15:18,230
Hivyo shukrani kwa ajili ya kufanya hivyo.

299
00:15:18,230 --> 00:15:20,210
Ni kubwa kukutana na wewe guys.

300
00:15:20,210 --> 00:15:22,880
Nini sisi ni gonna kufanya sasa ni kutumia ijayo kidogo kidogo

301
00:15:22,880 --> 00:15:24,740
kinda mbizi katika matatizo ya sehemu

302
00:15:24,740 --> 00:15:27,550
kwamba kuja kutokana na tatizo kuweka kutoka wiki hii

303
00:15:27,550 --> 00:15:29,920
na tutaweza kufanya hivyo kwa zaidi ya sehemu

304
00:15:29,920 --> 00:15:32,110
kwa ajili ya mapumziko ya muda mrefu,

305
00:15:32,110 --> 00:15:35,580
na kisha tutaweza kuokoa 15 iliyopita, dakika 20 au hivyo

306
00:15:35,580 --> 00:15:38,490
na kuzungumza kuhusu tatizo kuweka yenyewe

307
00:15:38,490 --> 00:15:41,420
na kisha tu maswali yoyote nyingine una katika jumla kuhusu darasa.

308
00:15:43,380 --> 00:15:45,670
Kwamba alisema, nini sisi kweli wanataka kufanya

309
00:15:45,670 --> 00:15:49,390
ni kuwa kila mtu kushiriki

310
00:15:49,390 --> 00:15:51,500
kutumia stuff Spaces,

311
00:15:51,500 --> 00:15:53,500
kutupa katika kanuni, kutupa katika mapendekezo,

312
00:15:53,500 --> 00:15:56,500
na kuzungumza juu wakati mambo kama hii mapumziko

313
00:15:56,500 --> 00:15:58,360
au kufanya kazi, kwa sababu tu haya ni mambo ambayo

314
00:15:58,360 --> 00:16:00,870
Najua mimi tulikipata

315
00:16:00,870 --> 00:16:03,180
wakati mimi kuanza coding,

316
00:16:03,180 --> 00:16:05,490
na walikuwa kweli kinda frustrating wakati

317
00:16:05,490 --> 00:16:08,690
kwa sababu kama ni kama 2:00 kabla ya tatizo lako kuweka ni kutokana,

318
00:16:08,690 --> 00:16:11,330
hivyo - tu kwa kutoa taarifa,

319
00:16:11,330 --> 00:16:14,590
Sikuweza kuanza programu mpaka mimi nilikuwa sophomore katika chuo.

320
00:16:14,590 --> 00:16:17,360
Ilikuwa ni aina ya jambo hili weird, haijulikani

321
00:16:17,360 --> 00:16:20,360
kwamba niliyosikia ilikuwa kinda cool

322
00:16:20,360 --> 00:16:23,590
na mimi pia habari inaweza kuwa maumivu ya kweli katika kitako

323
00:16:23,590 --> 00:16:27,610
kama miss semicolon na kwamba ni kosa tu kuweka mpango wako kutoka kazi

324
00:16:27,610 --> 00:16:30,890
na kinachokuzuia ya kwenda kulala,

325
00:16:30,890 --> 00:16:32,650
hivyo dhahiri,

326
00:16:32,650 --> 00:16:34,020
kama una maswali kama hayo,

327
00:16:34,020 --> 00:16:37,060
ikiwa una wasiwasi kama huo, basi mimi kujua,

328
00:16:37,060 --> 00:16:40,050
sababu nataka kufanya hili uzoefu mzuri kwa nyie.

329
00:16:40,050 --> 00:16:44,620
>> Hivyo kuwa na wewe guys wote kupakuliwa tatizo kuweka bado?

330
00:16:44,620 --> 00:16:47,160
Kinda kujua ambapo ni? Sawa.

331
00:16:47,160 --> 00:16:51,490
Hivyo tutaweza kwenda cs50.net, kwa sababu mimi si kuwa juu ya akaunti hii,

332
00:16:51,490 --> 00:16:54,110
kuvuta up seti tatizo,

333
00:16:54,110 --> 00:16:57,940
kuvuta juu ya tatizo kuweka 2, na tutaweza kuangalia toleo la kawaida leo.

334
00:16:57,940 --> 00:17:01,190
Tutaweza kuvuta vipimo hapa.

335
00:17:02,640 --> 00:17:04,420
Kitabu chini.

336
00:17:06,790 --> 00:17:11,109
Hivyo sisi ni gonna kuanza kuangalia sehemu hii ya maswali.

337
00:17:14,069 --> 00:17:16,710
Je, guys watched Shorts haya bado?

338
00:17:16,710 --> 00:17:18,329
Sawa.

339
00:17:18,329 --> 00:17:21,329
Hivyo kuna kaptula kwenye tanzi,

340
00:17:21,329 --> 00:17:24,700
ambayo inafanywa na Tommy, mmoja wa wenzake kufundisha kichwa.

341
00:17:24,700 --> 00:17:27,230
Kuna moja juu ya upeo,

342
00:17:27,230 --> 00:17:30,530
Naamini na mwingine wenzake mafundisho aitwaye Daudi

343
00:17:30,530 --> 00:17:33,400
na kisha moja juu ya Kaisari Cipher pia kufanyika kwa Daudi.

344
00:17:33,400 --> 00:17:35,550
Wao ni pretty cool.

345
00:17:35,550 --> 00:17:37,770
Je, guys been watching kaptula zao hadi sasa?

346
00:17:37,770 --> 00:17:39,270
How've wao wamekuwa?

347
00:17:39,270 --> 00:17:41,490
Msaada? Okay, nzuri ya kujua.

348
00:17:41,490 --> 00:17:44,210
Kama siyo, unaweza kusema hivyo.

349
00:17:46,290 --> 00:17:49,870
Lakini kabla ya kufanya,

350
00:17:49,870 --> 00:17:52,600
kuwa wewe guys inaonekana katika maswali haya

351
00:17:52,600 --> 00:17:55,430
wakati wote?

352
00:17:55,430 --> 00:17:57,480
>> Hebu majadiliano kuhusu hili kidogo.

353
00:17:57,480 --> 00:18:00,600
Hivyo tumekuwa kuletwa juu ya wanandoa wa mwisho wa wiki

354
00:18:00,600 --> 00:18:02,480
katika hotuba

355
00:18:02,480 --> 00:18:04,910
idadi ya matanzi tofauti.

356
00:18:04,910 --> 00:18:06,140
Kuna kwa kitanzi,

357
00:18:06,140 --> 00:18:09,570
kitanzi wakati, na kisha kitanzi do-wakati,

358
00:18:09,570 --> 00:18:13,100
na katika hotuba, tumekuwa kuzungumza mengi kuhusu

359
00:18:13,100 --> 00:18:16,010
jinsi wale matanzi wote ni

360
00:18:16,010 --> 00:18:18,320
haki sawa katika njia nyingi,

361
00:18:18,320 --> 00:18:21,210
na unaweza kufanya mengi ya mambo sawa kwa kitanzi wakati

362
00:18:21,210 --> 00:18:23,260
kwamba unaweza na kitanzi kwa.

363
00:18:23,260 --> 00:18:26,300
Wewe tu aina ya kutumia michanganyiko haki ya vigezo na vile.

364
00:18:26,300 --> 00:18:28,680
na hivyo kweli

365
00:18:28,680 --> 00:18:31,200
Tofauti halisi kati ya wote wa matanzi ni kwamba

366
00:18:31,200 --> 00:18:33,620
wakati mwingine wao ni muhimu zaidi

367
00:18:33,620 --> 00:18:36,930
kuzitumia kwa wakati mmoja kuliko wakati mwingine.

368
00:18:36,930 --> 00:18:39,340
>> Hivyo kwa mfano,

369
00:18:39,340 --> 00:18:42,260
kitanzi wakati tofauti na kitanzi do-wakati.

370
00:18:42,260 --> 00:18:45,680
Je, kila mtu kujisikia kama wana kushughulikia nzuri juu ya wakati

371
00:18:45,680 --> 00:18:48,650
kufanya-wakati kitanzi ni zaidi

372
00:18:48,650 --> 00:18:50,990
muhimu au nini tofauti ni?

373
00:18:50,990 --> 00:18:53,410
>> Nadhani tofauti ni kitanzi do-wakati

374
00:18:53,410 --> 00:18:56,960
anaendesha - Sijui kabisa nini istilahi ni,

375
00:18:56,960 --> 00:18:59,750
lakini mfululizo wa kazi ndani ya kitanzi.

376
00:18:59,750 --> 00:19:02,020
Wao moja kwa moja - ni gani anaendesha wake angalau

377
00:19:02,020 --> 00:19:05,390
kabla hundi hali, au kitanzi wakati tu kukimbia wakati

378
00:19:05,390 --> 00:19:08,290
ni kuendelea anaendesha - iwapo au hali ni kuwa ameridhika.

379
00:19:08,290 --> 00:19:11,010
Yeah, je, hiyo mantiki?

380
00:19:11,010 --> 00:19:14,200
>> Hebu tuangalie kidogo ya code.

381
00:19:14,200 --> 00:19:16,930
Hivyo tu kurudia swali,

382
00:19:16,930 --> 00:19:19,230
au jibu, badala;

383
00:19:19,230 --> 00:19:22,050
Jibu ni kwamba

384
00:19:22,050 --> 00:19:25,850
kitanzi wakati itakuwa kuangalia ili kuona kama hali

385
00:19:25,850 --> 00:19:27,440
kwamba wewe taja ni alikutana

386
00:19:27,440 --> 00:19:31,320
kabla anaendesha mwili wa kitanzi kwa mara ya kwanza,

387
00:19:31,320 --> 00:19:35,000
ambapo do-wakati kitanzi moja kwa moja kukimbia mwili wa kitanzi,

388
00:19:35,000 --> 00:19:38,450
ni nini sisi kuiita - ni weird istilahi,

389
00:19:38,450 --> 00:19:41,460
lakini kama milele kusema chochote kuwa haina mantiki, napenda kujua -

390
00:19:41,460 --> 00:19:45,360
mwili kitanzi ni kwamba mambo ambayo wewe kuweka katika kati ya braces curly.

391
00:19:45,360 --> 00:19:47,840
Na katika kitanzi do-wakati,

392
00:19:47,840 --> 00:19:50,220
kwamba mwili kupata kukimbia angalau mara moja,

393
00:19:50,220 --> 00:19:54,460
na kisha hali anapata checked kabla anaendesha kila wakati mfululizo.

394
00:19:54,460 --> 00:19:56,580
>> Hivyo kweli, Sam,

395
00:19:56,580 --> 00:20:00,820
je, wewe akili kuandika rahisi wakati kitanzi

396
00:20:00,820 --> 00:20:02,840
katika Spaces?

397
00:20:02,840 --> 00:20:05,600
>> Je aina ya kama

398
00:20:05,600 --> 00:20:07,060
kufanya mwezi ...?

399
00:20:07,060 --> 00:20:09,220
Mimi tu kufuta chochote una huko.

400
00:20:09,220 --> 00:20:11,300
Yeah, tu wazi nje.

401
00:20:11,300 --> 00:20:14,510
>> Naam, ninaamini kuwa nina hii -

402
00:20:14,510 --> 00:20:16,640
ambayo moja unataka, wakati, au unataka ...?

403
00:20:16,640 --> 00:20:19,350
Yeah, wakati tu wala kweli, magazeti kitu nje.

404
00:20:21,050 --> 00:20:23,140
Na hebu angalia.

405
00:20:23,140 --> 00:20:25,850
Alexander, mimi barabara sisi kamwe ilianzisha wewe.

406
00:20:25,850 --> 00:20:27,510
>> Oh, hiyo ni faini.

407
00:20:27,510 --> 00:20:30,760
Je - unaweza code juu kitanzi do-wakati kwa ajili yetu?

408
00:20:30,760 --> 00:20:32,520
>> Yeah, mimi nitajaribu.

409
00:20:32,520 --> 00:20:34,370
Haki zote, tutaweza tu vuta haya juu kwenye screen,

410
00:20:34,370 --> 00:20:38,240
ili kuwa na aina ya kushughulikia juu ya nini tofauti ni.

411
00:20:38,240 --> 00:20:41,280
>> Hivyo hapa ni nini Sam amefanya.

412
00:20:41,280 --> 00:20:44,460
Anacho integer kuitwa i

413
00:20:44,460 --> 00:20:47,480
kwamba yeye initialized hadi 17.

414
00:20:47,480 --> 00:20:51,570
Kisha anasema wakati (int i = 17)

415
00:20:51,570 --> 00:20:54,230
printf ("jina langu ni Sam.");

416
00:20:54,230 --> 00:20:57,300
Hivyo kile kinachotokea wakati sisi kukimbia hii code?

417
00:20:57,300 --> 00:21:00,340
Kuna hitilafu; gani kosa kusema?

418
00:21:00,340 --> 00:21:02,890
Hebu vuta it up na kuzungumza juu yake.

419
00:21:02,890 --> 00:21:05,040
Hitilafu ilitokea, inasema.

420
00:21:05,040 --> 00:21:07,400
Hebu kitabu chini.

421
00:21:07,400 --> 00:21:09,460
Hivyo alitupa kosa hili, na akasema,

422
00:21:09,460 --> 00:21:12,690
"Hey, mimi inatarajiwa kujieleza."

423
00:21:12,690 --> 00:21:16,180
Hiyo ni kinda cryptic.

424
00:21:19,160 --> 00:21:23,140
Yeah, hivyo hasa - na tena,

425
00:21:23,140 --> 00:21:27,140
kutakuwa na mdudu mwingine akiwa mdogo kwamba sisi catch katika haki ya pili.

426
00:21:27,140 --> 00:21:31,800
Lakini hii ni nyingine ya wale aina ya mambo weird istilahi,

427
00:21:31,800 --> 00:21:36,150
hivyo hii int i = 17

428
00:21:36,150 --> 00:21:39,290
si kujieleza.

429
00:21:39,290 --> 00:21:41,220
Nini inaonekana kama ni kufanya ni ni

430
00:21:41,220 --> 00:21:43,410
kutangaza integer kuitwa i

431
00:21:43,410 --> 00:21:45,540
na kuiandaa kwa sawa kwa 17

432
00:21:45,540 --> 00:21:48,780
au, bali kuweka ndani ya 17 int kwamba kuitwa i.

433
00:21:50,560 --> 00:21:53,350
Na kwamba haina mantiki

434
00:21:53,350 --> 00:21:55,790
katika muktadha wa kitanzi hii wakati.

435
00:21:55,790 --> 00:21:58,190
Haina mantiki, kama tutaweza kuona,

436
00:21:58,190 --> 00:22:01,250
katika mazingira ya kwa kitanzi, kwa sababu kwa kitanzi maazimio kufanya kuanza mbali

437
00:22:01,250 --> 00:22:05,800
na kwamba kwa int i sawa na kitu

438
00:22:05,800 --> 00:22:07,830
na unaendelea.

439
00:22:07,830 --> 00:22:09,500
>> Ndivyo alivyofanya wewe -

440
00:22:09,500 --> 00:22:12,630
kurekebisha kitu, wote haki.

441
00:22:12,630 --> 00:22:15,270
Hapa huenda; kutisha.

442
00:22:15,270 --> 00:22:17,920
Hivyo sasa mambo kuangalia tofauti kidogo.

443
00:22:17,920 --> 00:22:19,030
michache ya mambo yamebadilika.

444
00:22:19,030 --> 00:22:21,300
Unaweza kutuambia nini mambo yamebadilika?

445
00:22:21,300 --> 00:22:24,950
>> Mimi alichukua nje int, hivyo kuna tamko hakuna [inaudible] badala ya zoezi.

446
00:22:24,950 --> 00:22:28,770
moja ishara sawa, mimi kuweka 2 ishara sawa, ambayo ina maana sawa.

447
00:22:28,770 --> 00:22:30,560
Ajabu.

448
00:22:30,560 --> 00:22:33,320
Yeah, hivyo nini Sam gani alikuwa akatoa int

449
00:22:33,320 --> 00:22:35,770
kwamba alikuwa sahihi hapa mapema,

450
00:22:35,770 --> 00:22:39,340
hivyo kama mimi tu kuangalia hili - ni nini ilikuwa mapema, alisema int,

451
00:22:39,340 --> 00:22:41,970
ambayo ilikuwa kutangaza yake - hivyo sisi alichukua nje aina.

452
00:22:41,970 --> 00:22:44,710
Kuna int, char, kamba, mfupi,

453
00:22:44,710 --> 00:22:47,380
wale walioitwa aina.

454
00:22:47,380 --> 00:22:49,510
Hivyo alichukua nje ya aina

455
00:22:49,510 --> 00:22:51,580
na kisha hapo awali,

456
00:22:51,580 --> 00:22:54,190
naye alikuwa na moja tu alama ya usawa

457
00:22:54,190 --> 00:22:57,300
na nini alisema ulikuwa na tatizo kuhusu hili

458
00:22:57,300 --> 00:22:59,580
wakati una 1 alama ya usawa,

459
00:22:59,580 --> 00:23:01,780
hiyo ni operator zoezi.

460
00:23:01,780 --> 00:23:04,930
Hiyo si kupima kama au 2 mambo ni sawa.

461
00:23:04,930 --> 00:23:07,920
Hiyo ni kweli kuweka kitu sawa na kitu.

462
00:23:07,920 --> 00:23:11,110
Sisi ni kuweka namba 17 ndani ya i kutofautiana.

463
00:23:11,110 --> 00:23:13,850
Hivyo kufanya aina hiyo ya kulinganisha,

464
00:23:13,850 --> 00:23:16,430
una kutumia mara mbili sawa,

465
00:23:16,430 --> 00:23:19,640
ambayo ni aina ya kitu weird

466
00:23:19,640 --> 00:23:22,760
lakini ni kosa haki ya kawaida.

467
00:23:23,980 --> 00:23:27,830
Hivyo jambo moja nyingine mimi itabidi kumweka nje, kama wewe huna akili,

468
00:23:27,830 --> 00:23:30,610
ni kwamba katika

469
00:23:30,610 --> 00:23:33,210
kazi yetu hapa katika kuu int,

470
00:23:33,210 --> 00:23:36,740
unaweza kuona kwamba mwili wa kazi zetu

471
00:23:36,740 --> 00:23:39,810
ni kukabiliana kutoka upande wa kushoto

472
00:23:39,810 --> 00:23:42,400
na 4 nafasi au tab.

473
00:23:42,400 --> 00:23:44,730
sababu za kufanya hivyo

474
00:23:44,730 --> 00:23:47,000
ni tu kwa readability.

475
00:23:47,000 --> 00:23:51,620
Kama unaweza kuona katika wakati kitanzi Sam hapa,

476
00:23:51,620 --> 00:23:53,120
hakuwa Indent wakati wote,

477
00:23:53,120 --> 00:23:55,390
na kwamba haina kuathiri utendaji wa kificho.

478
00:23:55,390 --> 00:23:57,860
Itakuwa kukimbia sawa.

479
00:23:57,860 --> 00:24:00,950
>> Hivyo kwa mfano, kama sisi kuja juu hapa

480
00:24:00,950 --> 00:24:02,680
na waandishi wetu Play button, itakuwa kujenga,

481
00:24:02,680 --> 00:24:04,470
utakuwa kukimbia,

482
00:24:04,470 --> 00:24:06,700
na nini kitatokea?

483
00:24:06,700 --> 00:24:08,360
Kwa nini ni bado wanasema mbio?

484
00:24:08,360 --> 00:24:10,560
>> Sababu hiyo itabidi kushika kurudia hi.

485
00:24:10,560 --> 00:24:12,900
Hasa, na kwa nini ni kushika kurudia hi?

486
00:24:12,900 --> 00:24:15,850
>> Sababu integer kamwe mabadiliko, hivyo ni daima 17.

487
00:24:15,850 --> 00:24:18,030
Yeah, kwa uhakika, hivyo

488
00:24:18,030 --> 00:24:20,970
hebu angalia, baada ya - unikumbushe ya jina yako tena?

489
00:24:20,970 --> 00:24:24,020
Jimmy. Hivyo Jimmy alisema kuwa

490
00:24:24,020 --> 00:24:27,340
sababu hii anaendelea kurudia hi tena na tena

491
00:24:27,340 --> 00:24:30,510
ni kwa sababu ya hali hii ni kweli daima.

492
00:24:30,510 --> 00:24:33,270
Sisi kamwe kubadilisha thamani ya i.

493
00:24:33,270 --> 00:24:36,170
Sisi kamwe kubadilisha yaliyomo ya nini kuhifadhiwa katika variable kwamba.

494
00:24:36,170 --> 00:24:39,180
Hivyo katika hatua hii tulipata kosa hili kwamba

495
00:24:39,180 --> 00:24:42,170
mpango wako yanayotokana sana pato,

496
00:24:42,170 --> 00:24:45,100
na kama sisi kitabu chini na aina ya kuangalia nini kinaendelea hapa,

497
00:24:45,100 --> 00:24:49,160
unaweza kuona kwamba ni hi, hi, hi, hi, hi, hi, hi njia zote.

498
00:24:49,160 --> 00:24:51,200
Ajabu.

499
00:24:51,200 --> 00:24:53,750
>> Hivyo aina ya nyuma kwa uhakika awali

500
00:24:53,750 --> 00:24:57,020
kwamba kuwa indentation hapa

501
00:24:57,020 --> 00:25:00,110
katika mwili wa kitanzi wakati hawakuwa kuathiri kitu chochote.

502
00:25:00,110 --> 00:25:03,050
mpango bado mbio faini tu.

503
00:25:03,050 --> 00:25:06,790
Kawaida kwa mtindo mzuri -

504
00:25:06,790 --> 00:25:10,210
na hili ni jambo ambalo sisi kuangalia katika seti yako tatizo -

505
00:25:10,210 --> 00:25:13,930
tunakuomba Indent hii na nafasi 4, ambayo unaweza kufanya

506
00:25:13,930 --> 00:25:16,440
na tu kubwa muhimu tab

507
00:25:16,440 --> 00:25:18,860
au kwa manually kuweka katika maeneo ya 4 mwenyewe.

508
00:25:21,880 --> 00:25:25,050
Cool, sawa hivyo hebu kwenda nyuma na kuangalia

509
00:25:25,050 --> 00:25:30,460
Alexander kufanya-wakati.

510
00:25:30,460 --> 00:25:32,980
>> Tu kinda shida kidogo.

511
00:25:32,980 --> 00:25:34,390
Okay, vizuri hebu kazi kwa njia hiyo.

512
00:25:34,390 --> 00:25:36,400
Ni kwamba baridi?

513
00:25:36,400 --> 00:25:37,430
>> Yeah.

514
00:25:37,430 --> 00:25:39,200
>> Okay, kwa hivyo hapa sisi kwenda.

515
00:25:39,200 --> 00:25:41,010
Hii ni kanuni kwamba Alexander aliandika.

516
00:25:41,010 --> 00:25:43,410
Je, wewe kwenda na Alex - sawa.

517
00:25:43,410 --> 00:25:46,380
Hivyo hapa ni kificho kwamba Alex ameandika.

518
00:25:46,380 --> 00:25:50,500
Hivyo, sisi tumepewa tamko wetu wa kuu wa kulia hapa,

519
00:25:50,500 --> 00:25:54,410
na kisha tumekuwa got hii variable integer kuitwa i

520
00:25:54,410 --> 00:25:57,320
kuwa alitangaza haki hapa.

521
00:25:57,320 --> 00:26:01,060
Sisi tumepewa taarifa do

522
00:26:01,060 --> 00:26:04,600
na kisha mwili tena na braces hizi,

523
00:26:04,600 --> 00:26:06,520
hivyo hii ni mwili wa do-wakati -

524
00:26:06,520 --> 00:26:09,210
basi mimi kuvuta hii hivyo ni zaidi someka -

525
00:26:09,210 --> 00:26:12,730
na katika mwili, sisi ni kujaribu magazeti "huu ni mwili",

526
00:26:12,730 --> 00:26:14,300
i + +,

527
00:26:14,300 --> 00:26:17,710
hivyo increment yaliyomo ya i na kufanya hivi

528
00:26:17,710 --> 00:26:19,470
mpaka i anapata kuwa 3,

529
00:26:19,470 --> 00:26:22,440
na kisha programu yetu ya mwisho.

530
00:26:22,440 --> 00:26:24,680
>> Hivyo kile kinachotokea wakati sisi kukimbia mpango huu?

531
00:26:24,680 --> 00:26:27,580
>> Nilitarajia kitambulisho.

532
00:26:27,580 --> 00:26:32,070
Sawa, hivyo kujenga, kuendesha, kosa hutokea.

533
00:26:32,070 --> 00:26:34,820
Nini kinatokea?

534
00:26:34,820 --> 00:26:37,060
Sisi kitabu chini hapa,

535
00:26:37,060 --> 00:26:40,260
sisi kupata hii kitu cryptic kuangalia kitu,

536
00:26:40,260 --> 00:26:43,930
inatarajiwa semicolon baada ya tamko ngazi ya juu.

537
00:26:43,930 --> 00:26:46,620
Hiyo ni kinda weird.

538
00:26:46,620 --> 00:26:50,990
Je, mtu yeyote kuwa na wazo ya nini kinaweza kuwa kinachoendelea?

539
00:26:53,080 --> 00:26:54,640
Kinda weird, yeah.

540
00:26:54,640 --> 00:26:57,640
>> [Inaudible] kutangazwa kuwa nje ya mabano?

541
00:26:57,640 --> 00:27:03,480
Hivyo gani kwamba si kuomba kisha wakati matumizi ya mabano?

542
00:27:03,480 --> 00:27:07,390
Kwa hiyo alitangaza guy hii nje ya ambayo mabano?

543
00:27:09,670 --> 00:27:12,240
Oh, haya guys - braces curly?

544
00:27:12,240 --> 00:27:13,850
>> Yeah.

545
00:27:13,850 --> 00:27:15,310
Yeah, kwa uhakika.

546
00:27:15,310 --> 00:27:17,120
Hivyo ni zinageuka kuwa

547
00:27:17,120 --> 00:27:21,550
huwezi kweli kutangaza variable haki hapa kama hii.

548
00:27:23,750 --> 00:27:26,690
Nini unaweza wamekuwa wakijaribu kufanya ni -

549
00:27:26,690 --> 00:27:30,110
waikate ya hapo -

550
00:27:30,110 --> 00:27:34,330
unaweza ama kuiweka ndani ya braces curly haki hapa

551
00:27:34,330 --> 00:27:37,400
au nyingine mbadala

552
00:27:37,400 --> 00:27:40,350
ni kuweka kabisa nje.

553
00:27:42,480 --> 00:27:46,610
Na hivyo hizi - kulingana na pale wewe kweli kuweka tangazo

554
00:27:46,610 --> 00:27:48,550
ya kwamba variable integer,

555
00:27:48,550 --> 00:27:53,540
unaweza kupata 2 aina tofauti sana ya vigezo;

556
00:27:53,540 --> 00:27:55,100
wakati ni nje ya kuu,

557
00:27:55,100 --> 00:27:58,240
ni nini tunaita variable kimataifa.

558
00:27:58,240 --> 00:28:00,070
Ni nje ya upeo wa yoyote ya kazi -

559
00:28:00,070 --> 00:28:03,420
si ndani ya kazi -

560
00:28:03,420 --> 00:28:07,050
lakini kama sisi kuweka ndani ya kuu,

561
00:28:07,050 --> 00:28:10,000
kama haki hapa, basi ni kuitwa variable mitaa,

562
00:28:10,000 --> 00:28:13,830
sababu ni mitaa ya wigo wa kuu.

563
00:28:13,830 --> 00:28:16,720
Na tutaweza kuzungumza kidogo zaidi kuhusu nini tofauti ni

564
00:28:16,720 --> 00:28:20,970
kati ya aina 2 na kwa nini wewe kutumia aina tofauti ya vigezo,

565
00:28:20,970 --> 00:28:23,040
lakini kwa sasa,

566
00:28:23,040 --> 00:28:25,070
unaweza kuweka tu vigezo vyote mitaa,

567
00:28:25,070 --> 00:28:28,320
kwa sababu hatuna haja yoyote kwa vigezo kimataifa.

568
00:28:28,320 --> 00:28:31,390
>> Sawa, hivyo kwamba jambo moja pale pale.

569
00:28:31,390 --> 00:28:34,680
Hebu jaribu mbio hii tena, kuona nini kinatokea.

570
00:28:37,420 --> 00:28:40,270
Kukimbia, kupata mwingine makosa.

571
00:28:40,270 --> 00:28:43,320
Zoom katika kidogo, je, sisi kupata?

572
00:28:45,110 --> 00:28:50,000
Sisi kupata hii mabano inatarajiwa baada ya kufanya / wakati.

573
00:28:53,660 --> 00:28:55,260
Mawazo yoyote ya nini kinaendelea? Dan?

574
00:28:55,260 --> 00:28:58,880
>> Je wakati basi mabano na kisha -

575
00:28:58,880 --> 00:29:01,990
Sijui kama unahitaji redeclare int,

576
00:29:01,990 --> 00:29:04,980
lakini kufanya wakati (i <3).

577
00:29:04,980 --> 00:29:06,930
Hasa, yeah.

578
00:29:06,930 --> 00:29:08,830
Hivyo ni zinageuka kuwa Dan ni sahihi kabisa.

579
00:29:08,830 --> 00:29:11,230
Hatuna haja ya kuweka aina hii hapa tena.

580
00:29:11,230 --> 00:29:14,440
Tunaweza badala kuua aina

581
00:29:14,440 --> 00:29:17,220
na tu kufanya hivyo.

582
00:29:19,270 --> 00:29:21,640
Wote haki.

583
00:29:21,640 --> 00:29:24,950
Mimi itabidi zoom nyuma nje, kujaribu moja zaidi wakati.

584
00:29:26,360 --> 00:29:29,580
Angalia katika hiyo; ni anaendesha mafanikio.

585
00:29:29,580 --> 00:29:33,260
Kama sisi kitabu chini, "huu ni mwili" kuchapishwa mara 3.

586
00:29:33,260 --> 00:29:35,820
Hiyo ni pretty tamu.

587
00:29:35,820 --> 00:29:38,670
Vema, vizuri, guys.

588
00:29:38,670 --> 00:29:41,080
Vema.

589
00:29:41,080 --> 00:29:43,250
Jinsi s hii kwenda hadi sasa?

590
00:29:43,250 --> 00:29:46,200
Heshima kasi?

591
00:29:46,200 --> 00:29:49,200
Okay, cool.

592
00:29:49,200 --> 00:29:52,590
>> Hivyo, kama sisi aina ya nyuma kwa swali la kwanza,

593
00:29:52,590 --> 00:29:55,430
sisi - na sasa kama sisi kuona tofauti,

594
00:29:55,430 --> 00:29:58,240
unaweza kuona kwamba katika hii kitanzi do-wakati,

595
00:29:58,240 --> 00:30:00,030
hali huja mwisho.

596
00:30:00,030 --> 00:30:02,530
Hivyo kama kompyuta wasomaji mpango

597
00:30:02,530 --> 00:30:06,050
tangu programu C ni kunyongwa aina ya utaratibu huu katika mtiririko,

598
00:30:06,050 --> 00:30:09,450
ambapo wao literally kuanza na mstari wa kwanza wa kuu,

599
00:30:09,450 --> 00:30:13,450
na kisha kutekeleza mstari 6, mstari 7, mstari 8, mstari 9,

600
00:30:13,450 --> 00:30:16,150
mstari wa 10, mstari wa 11,

601
00:30:16,150 --> 00:30:18,440
mambo haya yote katika juu kulia hapa

602
00:30:18,440 --> 00:30:20,020
ni kwenda kutekeleza mara moja

603
00:30:20,020 --> 00:30:23,350
kabla ya sisi milele mtihani hali hii ili kuona

604
00:30:23,350 --> 00:30:26,240
kama au si i - au yaliyomo i, badala -

605
00:30:26,240 --> 00:30:29,750
ni kidogo kuliko idadi 3.

606
00:30:29,750 --> 00:30:33,300
Na mara moja tu kama sisi kupata mstari 12,

607
00:30:33,300 --> 00:30:36,260
yaliyomo ya i ni chini ya 3

608
00:30:36,260 --> 00:30:39,150
je sisi kweli kuruka nyuma hadi mstari 7

609
00:30:39,150 --> 00:30:41,140
na kisha kurudia mchakato,

610
00:30:41,140 --> 00:30:44,620
na kisha sisi mtihani hali tena na tena na tena.

611
00:30:44,620 --> 00:30:47,440
>> Basi, tunaweza kulinganisha hii

612
00:30:47,440 --> 00:30:50,240
na - zooming nyuma nje,

613
00:30:50,240 --> 00:30:56,500
kitabu chini na toleo Sam,

614
00:30:56,500 --> 00:31:00,760
sisi ni gonna kuangalia hii, kidogo iliyopita hivyo kwamba hakuna tena kitanzi usio -

615
00:31:00,760 --> 00:31:03,570
ambapo kama sisi zoom katika,

616
00:31:03,570 --> 00:31:06,300
tunaona kwamba kama mpango huu executes,

617
00:31:06,300 --> 00:31:09,120
itakavyo kwanza kutangaza int i,

618
00:31:09,120 --> 00:31:12,030
kuweka yaliyomo i kuwa kwa 0,

619
00:31:12,030 --> 00:31:15,820
na kisha ni hits ya hali ya wakati kitanzi kwanza,

620
00:31:15,820 --> 00:31:19,210
hivyo katika kesi hii, mwili, hii printf ("hi") na i + +

621
00:31:19,210 --> 00:31:21,630
wala hata nitafanya

622
00:31:21,630 --> 00:31:24,310
isipokuwa i ni kweli chini ya au sawa na 2.

623
00:31:24,310 --> 00:31:26,750
Hivyo kama i ni 3, kwa mfano,

624
00:31:26,750 --> 00:31:28,840
kama sisi kuweka haki hii hapa

625
00:31:28,840 --> 00:31:32,160
sawa na 4 - au nitafanya 3, kwa sababu mimi alisema 3 -

626
00:31:32,160 --> 00:31:34,890
na kisha kukimbia,

627
00:31:34,890 --> 00:31:38,320
itabidi kujenga, hivyo itabidi kukimbia kabisa faini,

628
00:31:38,320 --> 00:31:40,530
lakini si kweli magazeti nje kitu chochote,

629
00:31:40,530 --> 00:31:43,030
kwa sababu ya kushindwa mtihani kwamba kwa kesi ya kwanza.

630
00:31:44,780 --> 00:31:47,530
Hivyo katika darasa, sisi aina ya walizungumzia juu ya sababu hizi matanzi do-wakati

631
00:31:47,530 --> 00:31:49,800
ni muhimu wakati mwingine

632
00:31:49,800 --> 00:31:53,140
na kwa nini tunataka kutumia kama kinyume na kitanzi wakati.

633
00:31:53,140 --> 00:31:56,450
>> Je, kuna - do you guys mapendekezo yoyote

634
00:31:56,450 --> 00:31:59,090
kwa nini-wakati kitanzi inaweza kuwa muhimu zaidi?

635
00:31:59,090 --> 00:32:02,560
>> Vizuri, nadhani kufanya-wakati matanzi ni kama unataka user pembejeo,

636
00:32:02,560 --> 00:32:05,020
kwa sababu njia hiyo unaweza waache

637
00:32:05,020 --> 00:32:07,780
kuweka kitu katika mara moja; kama ni sahihi,

638
00:32:07,780 --> 00:32:09,300
tunaweza kuendelea na mapumziko ya mpango,

639
00:32:09,300 --> 00:32:11,250
lakini kama si sahihi, basi wewe kuendelea na kusababisha mtumiaji

640
00:32:11,250 --> 00:32:13,250
mpaka wewe kuweka mchango wa kulia.

641
00:32:13,250 --> 00:32:14,260
Yeah, kwa uhakika - ya uhakika,

642
00:32:14,260 --> 00:32:16,840
hivyo kufanya-wakati kitanzi ni muhimu

643
00:32:16,840 --> 00:32:18,930
sababu wakati uvuvio kwa ajili ya pembejeo user

644
00:32:18,930 --> 00:32:23,000
kwa sababu unahitaji kupata pembejeo mtumiaji kabla unaweza kweli kuangalia ni.

645
00:32:23,000 --> 00:32:27,330
Hivyo katika pset 1, katika pset 2,

646
00:32:27,330 --> 00:32:29,650
ambapo wewe ni uvuvio kwa ajili ya pembejeo user mengi,

647
00:32:29,650 --> 00:32:31,200
hilo ni jambo Handy kutumia

648
00:32:31,200 --> 00:32:33,740
kinyume na kitanzi rahisi tu wakati.

649
00:32:33,740 --> 00:32:36,780
Kama kutumia kitanzi wakati, unaweza kufanya kitu kimoja -

650
00:32:36,780 --> 00:32:38,750
unaweza kufanya kitu kimoja kwa kitanzi wakati

651
00:32:38,750 --> 00:32:40,580
kama wewe kufanya na kitanzi do-wakati.

652
00:32:40,580 --> 00:32:43,380
Wewe tu aina ya kuwa na mchakato huu duplicate

653
00:32:43,380 --> 00:32:47,010
ambapo unaweza kupata pembejeo kwanza na kisha kuanza wakati wako kitanzi.

654
00:32:47,010 --> 00:32:49,800
Wakati do-wakati kitanzi, wewe tu na kuandika ni mara moja

655
00:32:49,800 --> 00:32:52,430
na ni safi sana.

656
00:32:52,430 --> 00:32:54,650
>> Wote haki.

657
00:32:55,970 --> 00:32:57,330
Maswali yoyote?

658
00:32:59,350 --> 00:33:01,380
Mantiki?

659
00:33:01,380 --> 00:33:06,200
>> Kurudi 0 - hiyo ni aina tu ya duka au ni -?

660
00:33:06,200 --> 00:33:08,960
Yeah, hivyo tunaweza -

661
00:33:08,960 --> 00:33:11,960
vizuri, tutaweza cover hii kidogo zaidi baadaye

662
00:33:11,960 --> 00:33:13,290
lakini zinageuka kuwa

663
00:33:13,290 --> 00:33:15,720
hii 0 kurudi kwamba sisi kuweka

664
00:33:15,720 --> 00:33:19,090
mwisho wa wakati wote kuu -

665
00:33:19,090 --> 00:33:21,980
unaweza kinda tu kuchukua kama kitu sisi kufanya

666
00:33:21,980 --> 00:33:24,930
kwa wakati huu.

667
00:33:24,930 --> 00:33:28,860
Nini tumekuwa walianza kuzungumzia na kazi

668
00:33:28,860 --> 00:33:31,600
aina ya mwishoni mwa wiki iliyopita na kisha tena wiki hii

669
00:33:31,600 --> 00:33:33,550
ni kwamba kazi

670
00:33:33,550 --> 00:33:37,680
inachukua pembejeo ambayo ni mambo haya ndani ya mabano;

671
00:33:37,680 --> 00:33:41,690
hizi ni 2 pembejeo, hoja yetu au vigezo,

672
00:33:41,690 --> 00:33:44,540
nini re pia hujulikana kwa kazi yetu kuu,

673
00:33:44,540 --> 00:33:48,510
na kisha kazi inazalisha pato

674
00:33:48,510 --> 00:33:51,290
ambayo sisi kuwaita thamani kurudi.

675
00:33:51,290 --> 00:33:56,260
Na thamani ya kurudi katika kesi ya kuu ni hii int,

676
00:33:56,260 --> 00:33:58,320
hii integer,

677
00:33:58,320 --> 00:34:01,160
na njia ya kumweleza kazi, "Hey, hii ni nini pato yako

678
00:34:01,160 --> 00:34:05,840
ni kwenda kuwa, "ni pamoja na hili neno" kurudi ",

679
00:34:05,840 --> 00:34:07,960
kwamba Keyword, badala yake,

680
00:34:07,960 --> 00:34:11,000
na hivyo kuu kurudi 0

681
00:34:11,000 --> 00:34:13,389
au kuu outputting 0

682
00:34:13,389 --> 00:34:15,139
ni ya kiwango katika programu C

683
00:34:15,139 --> 00:34:18,110
kwa sababu kurudi 0 kutoka njia kuu ya kuwa

684
00:34:18,110 --> 00:34:21,600
"Hey, kila kitu kunyongwa na mpango wangu faini tu."

685
00:34:21,600 --> 00:34:24,639
Kama tulikuwa na kuweka kitu kingine zaidi ya 0,

686
00:34:24,639 --> 00:34:27,440
kama 1, kwa mfano,

687
00:34:27,440 --> 00:34:31,080
hiyo ni kutumika kwa kuwaambia kila mbio mpango huu

688
00:34:31,080 --> 00:34:33,540
kitu ambacho potoka.

689
00:34:35,739 --> 00:34:39,989
Hivyo kama sisi kupata kushiriki zaidi na mambo juu ya muhula,

690
00:34:39,989 --> 00:34:42,670
kama wewe ni milele wanaohitaji kusema,

691
00:34:42,670 --> 00:34:46,650
"Lo, unajua, kitu potoka na mpango huu,"

692
00:34:46,650 --> 00:34:49,409
badala ya kuwa na mpango wangu ajali, nataka meddela

693
00:34:49,409 --> 00:34:52,310
mkimbiaji wa mpango wangu kwamba kitu potoka,

694
00:34:52,310 --> 00:34:54,530
unaweza kutumia kurudi thamani,

695
00:34:54,530 --> 00:34:57,230
kama sisi kuiita, kwamba si 0.

696
00:35:00,180 --> 00:35:02,240
>> Hivyo tutaweza cover kwamba kidogo zaidi

697
00:35:02,240 --> 00:35:05,480
mara moja sisi kupata katika utendaji.

698
00:35:05,480 --> 00:35:09,030
Kwamba aina ya mantiki?

699
00:35:09,030 --> 00:35:11,240
Sawa.

700
00:35:11,240 --> 00:35:13,530
Kazi ni aina ya ajabu -

701
00:35:13,530 --> 00:35:17,270
Nadhani kwa watu ambao wana kura ya background math,

702
00:35:17,270 --> 00:35:20,100
inakuja kidogo kwa urahisi zaidi,

703
00:35:20,100 --> 00:35:22,540
hasa kama una kidogo zaidi abstract math background

704
00:35:22,540 --> 00:35:24,240
na wewe ni kutumika kwa kuzungumza juu ya kazi

705
00:35:24,240 --> 00:35:27,370
na aina ya kwamba yote ya mambo.

706
00:35:28,590 --> 00:35:30,610
Lakini tutaweza kujaribu na kuvifunika

707
00:35:30,610 --> 00:35:33,280
na kwenda nzuri na polepole kama wao kuja.

708
00:35:34,730 --> 00:35:37,870
Aidha, hii yote int argc,

709
00:35:37,870 --> 00:35:41,090
Char * argv [],

710
00:35:41,090 --> 00:35:44,960
kwa sasa hivi, unaweza pia kuchukua kwamba kama boiler sahani.

711
00:35:46,650 --> 00:35:49,050
Tulishaanza kufidia wale kidogo kidogo katika hotuba

712
00:35:49,050 --> 00:35:53,060
tunapozungumzia hoja kwamba kupata kupita katika mipango juu ya mstari amri,

713
00:35:53,060 --> 00:35:55,700
lakini katika tatizo lako seti na mipango yako,

714
00:35:55,700 --> 00:35:58,760
ni kabisa faini tu kuandika utupu na kuitunza rahisi.

715
00:35:58,760 --> 00:36:01,490
Na nini utupu hii ina maana kwamba ni

716
00:36:01,490 --> 00:36:04,630
"Hey, kuu si kwenda kukubali pembejeo yoyote;

717
00:36:04,630 --> 00:36:07,440
hii ni mpango tuko gonna kukimbia tu.

718
00:36:07,440 --> 00:36:09,320
Sisi siyo gonna kuwapa taarifa yoyote ya ziada

719
00:36:09,320 --> 00:36:12,420
kila wakati sisi kuanza it up mbio. "

720
00:36:14,730 --> 00:36:16,600
Hivyo kwa sasa, unaweza kufanya hivyo;

721
00:36:16,600 --> 00:36:19,710
unaweza pia hata omit 0 kurudi

722
00:36:19,710 --> 00:36:22,650
mwisho wa programu yako na wao itabidi kukimbia faini tu,

723
00:36:22,650 --> 00:36:26,150
lakini mimi kupendekeza tu kuweka kwamba in

724
00:36:26,150 --> 00:36:28,320
Katika wiki kadhaa, tutaweza kuanza kwa aina ya

725
00:36:28,320 --> 00:36:31,340
kuvuta nyuma cover kidogo na kuelewa zaidi kuhusu

726
00:36:31,340 --> 00:36:34,380
tofauti wale wote kidogo kusonga sehemu.

727
00:36:34,380 --> 00:36:38,160
>> Haki zote, sasa hebu majadiliano kuhusu swali la pili hapa.

728
00:36:38,160 --> 00:36:43,190
Hiyo ni nini "Undeclared kitambulisho" kawaida zinaonyesha

729
00:36:43,190 --> 00:36:46,040
ikiwa outputted na Clang?

730
00:36:46,040 --> 00:36:49,290
Nadhani sisi aliyoiona kwamba tayari leo.

731
00:36:51,170 --> 00:36:54,370
Je, mtu kutoa recap ya nini maana ya?

732
00:36:54,370 --> 00:36:57,680
Hebu angalia, Kelly - moja ya Kellys.

733
00:37:02,580 --> 00:37:05,300
Hivyo >> -

734
00:37:05,300 --> 00:37:07,080
Yeah, ni nini -

735
00:37:07,080 --> 00:37:10,140
>> Nadhani wakati wewe, kama, wala kutangaza vigezo na kujaribu kuitumia.

736
00:37:10,140 --> 00:37:13,310
Yeah, kwa uhakika, hasa.

737
00:37:13,310 --> 00:37:15,250
Hivyo kama umewahi kuona hii pato

738
00:37:15,250 --> 00:37:17,690
wakati wewe kujaribu na kukusanya mpango wako,

739
00:37:17,690 --> 00:37:19,470
tu kama Kelly alisema,

740
00:37:19,470 --> 00:37:24,210
inamaanisha kuwa kutumika variable kwamba hawakuwa na kutangaza,

741
00:37:24,210 --> 00:37:28,460
hivyo kama mimi kurejea Space yetu,

742
00:37:28,460 --> 00:37:31,150
na mimi kufanya kitu kama

743
00:37:31,150 --> 00:37:34,800
printf (

744
00:37:34,800 --> 00:37:38,260
"Hello% s")

745
00:37:40,070 --> 00:37:42,440
na kujaribu na kuziba katika% s

746
00:37:42,440 --> 00:37:45,640
na s variable kwamba mimi si alitangaza popote

747
00:37:45,640 --> 00:37:48,330
na mimi kujaribu kukimbia,

748
00:37:48,330 --> 00:37:51,330
utaona nini mimi kupata chini kwa chini haki hii hapa:

749
00:37:51,330 --> 00:37:54,010
"Matumizi ya Undeclared kitambulisho 's'";

750
00:37:54,010 --> 00:37:57,710
kwamba tu ina maana hakuwa kutangaza variable yako.

751
00:37:57,710 --> 00:38:00,750
Kitu kimoja kinachotokea kama

752
00:38:00,750 --> 00:38:05,240
una x na wewe kujaribu na kuhifadhi 7 ndani yake

753
00:38:05,240 --> 00:38:08,720
na sikuweza kutangaza X.

754
00:38:08,720 --> 00:38:10,200
Mimi kupata kwamba kosa sawa:

755
00:38:10,200 --> 00:38:13,480
"Matumizi ya 'x' Undeclared kitambulisho".

756
00:38:16,390 --> 00:38:18,250
>> Yote ya haki,

757
00:38:18,250 --> 00:38:21,720
hivyo Cipher Kaisari, sio kuwa salama sana,

758
00:38:21,720 --> 00:38:24,590
Mimi itabidi basi guys kuangalia hii fupi, aina ya kuelewa kwa nini,

759
00:38:24,590 --> 00:38:27,590
na hopefully baada ya kufanya tatizo hili la wiki hii kuweka

760
00:38:27,590 --> 00:38:29,270
ambapo kwa kweli kuandika Cipher Kaisari, wewe utaweza kuelewa kidogo zaidi

761
00:38:29,270 --> 00:38:32,600
kuhusu nini maana ya kuwa salama na uhaba -

762
00:38:36,180 --> 00:38:38,960
au si salama, mimi nadhani - ni uhaba tofauti kidogo.

763
00:38:40,560 --> 00:38:43,140
Kitu nyingine ilikuwa tuna maswali haya mengine hapa

764
00:38:43,140 --> 00:38:45,470
juu ya kazi

765
00:38:45,470 --> 00:38:47,330
na nini kazi ni,

766
00:38:47,330 --> 00:38:52,820
na sisi aina ya kuongelea kwa ufupi kwamba wakati sisi aliyesema kuhusu maadili ya kurudi;

767
00:38:52,820 --> 00:38:54,560
kwa mtu ambaye amekuwepo kwa hotuba,

768
00:38:54,560 --> 00:38:57,790
unaweza kurejea ambaye amekuwepo kwa hotuba leo?

769
00:38:57,790 --> 00:38:59,670
Wote haki.

770
00:39:01,210 --> 00:39:04,320
Hebu angalia; hebu kuwa - inaweza mtu kutuambia nini kazi ni?

771
00:39:04,320 --> 00:39:06,060
Kelly?

772
00:39:07,800 --> 00:39:11,260
>> Kimsingi >> kitu kuteka juu ya kitu ambacho Imeandikwa katika maktaba hiyo ni

773
00:39:11,260 --> 00:39:14,460
ngumu zaidi juu huko, na kisha wewe andika tu fomu fupi ya hayo,

774
00:39:14,460 --> 00:39:17,360
hivyo kama wewe ni akimaanisha nyuma maktaba kwamba, kwa kutumia

775
00:39:17,360 --> 00:39:19,650
kificho kwamba muda wote na [inaudible].

776
00:39:19,650 --> 00:39:22,680
Yeah, kwa uhakika, na kisha unataka kuongeza kitu kwa kuwa?

777
00:39:22,680 --> 00:39:27,050
>> Yeah, nadhani kuhusu hilo kama sawa na dhana ya formula katika math

778
00:39:27,050 --> 00:39:30,130
ambapo wewe andika tu formula na kisha unaweza kuziba vigezo katika

779
00:39:30,130 --> 00:39:32,660
na kwamba ni nini kazi ni [inaudible].

780
00:39:32,660 --> 00:39:35,390
>> Yeah, hivyo sisi tumepewa michache ya majibu hapa

781
00:39:35,390 --> 00:39:38,080
kwamba wote ni mzuri na sahihi juu ya.

782
00:39:38,080 --> 00:39:43,040
Kuna akimaanisha code hiyo imekuwa imeandikwa katika maktaba mahali fulani

783
00:39:43,040 --> 00:39:45,390
kwamba ni ngumu zaidi

784
00:39:45,390 --> 00:39:47,130
na kisha unaweza kuteka juu ya kificho kwamba

785
00:39:47,130 --> 00:39:50,480
na kweli matumizi yake kwa kuandika tu fomu fupi ya hilo -

786
00:39:50,480 --> 00:39:54,060
au, bali jina lake -

787
00:39:54,060 --> 00:39:57,590
na kisha pia kuna hii kulinganisha na formula katika math

788
00:39:57,590 --> 00:40:00,400
au fizikia, aina yote ya mambo ya

789
00:40:00,400 --> 00:40:02,980
ambapo una formula

790
00:40:02,980 --> 00:40:05,690
na unaweza kisha kuziba katika

791
00:40:05,690 --> 00:40:08,100
vigezo formula kwamba

792
00:40:08,100 --> 00:40:11,130
na kisha kupata matokeo ya formula,

793
00:40:11,130 --> 00:40:14,580
hivyo wewe kufikiri juu yake kama kama equation quadratic.

794
00:40:14,580 --> 00:40:17,690
Hebu fikiria kama badala ya kuwa na kujifunza juu ya

795
00:40:17,690 --> 00:40:21,310
nini formula quadratic ni katika darasa math,

796
00:40:21,310 --> 00:40:24,610
wewe tu alikuwa kidogo Calculator mpango kwamba alifanya hivyo kwa ajili yenu.

797
00:40:24,610 --> 00:40:28,930
Je mtu yeyote kutumia programu Calculator katika madarasa math katika shule ya sekondari?

798
00:40:28,930 --> 00:40:31,020
Yeah, fizikia madarasa?

799
00:40:31,020 --> 00:40:34,670
Ambapo unaweza tu kusema, "Hey, formula quadratic.

800
00:40:34,670 --> 00:40:37,740
Hizi ni vigezo kwamba mimi nataka pembejeo.

801
00:40:37,740 --> 00:40:40,250
Sasa nipe jibu. "

802
00:40:40,250 --> 00:40:42,170
Hiyo ni aina ya kazi ni nini.

803
00:40:42,170 --> 00:40:44,850
Ni njia kwa sisi

804
00:40:44,850 --> 00:40:47,720
aina ya kuandika kama mpango kidogo kidogo ndogo

805
00:40:47,720 --> 00:40:51,700
ndani ya mpango wetu kubwa

806
00:40:51,700 --> 00:40:55,090
na matumizi yake tena na tena

807
00:40:55,090 --> 00:40:58,380
hivyo kwamba hatuna na nakala na kuweka kanuni,

808
00:40:58,380 --> 00:41:04,220
tunaweza kuwapa pembejeo mbalimbali na kupata matokeo tofauti,

809
00:41:04,220 --> 00:41:07,090
ni super Handy

810
00:41:07,090 --> 00:41:11,420
wakati wewe ni kujaribu kuandika programu mbalimbali kwa nyakati tofauti.

811
00:41:11,420 --> 00:41:14,580
>> Hivyo kwa mfano, kazi ambayo tumekuwa kutumia tena na tena na tena

812
00:41:14,580 --> 00:41:17,310
katika mwenendo ni printf.

813
00:41:17,310 --> 00:41:19,680
Printf ni yenyewe kazi

814
00:41:19,680 --> 00:41:23,360
na ni zinageuka kuwa ni kweli pretty muda mrefu na ngumu,

815
00:41:23,360 --> 00:41:26,420
nasty kuangalia, kazi ya kuandika.

816
00:41:26,420 --> 00:41:29,590
Hivyo kama rahisi kama inaonekana kwetu

817
00:41:29,590 --> 00:41:31,810
na magazeti stuff nje screen,

818
00:41:31,810 --> 00:41:34,820
kwa sababu sisi wote tu alifanya kwamba katika mwanzo wa leo sehemu,

819
00:41:34,820 --> 00:41:36,870
zinageuka kuwa ni kweli, unajua,

820
00:41:36,870 --> 00:41:39,900
wanandoa nzuri ya mistari mia ya maadili.

821
00:41:42,030 --> 00:41:45,620
Siyo kitu ambacho mimi ingekuwa milele unataka kuandika, kwa hakika,

822
00:41:45,620 --> 00:41:47,480
lakini sisi kupata na kutumia kila siku; hiyo ni aina ya baridi,

823
00:41:47,480 --> 00:41:49,020
hivyo sisi kupata kushiriki kwa kila mmoja,

824
00:41:49,020 --> 00:41:51,790
na mipango mbalimbali,

825
00:41:51,790 --> 00:41:54,520
hivyo tutaweza kuwa mbizi zaidi katika utendaji;

826
00:41:54,520 --> 00:41:56,090
kwa wakati kuwa, sisi siyo -

827
00:41:56,090 --> 00:41:59,150
kazi tu sisi utaenda kuandika ni kuu.

828
00:41:59,150 --> 00:42:01,570
Kuu yenyewe pia ni kazi,

829
00:42:01,570 --> 00:42:04,270
na unaweza kuona ni got pato lake,

830
00:42:04,270 --> 00:42:06,610
pembejeo wake kama kuongelea,

831
00:42:06,610 --> 00:42:08,930
na kisha jina yake, ambayo ni kuu.

832
00:42:08,930 --> 00:42:11,800
Kuu ni aina ya - ni kazi maalum huko.

833
00:42:11,800 --> 00:42:14,800
Katika mpango wako C, kuna ina kazi kubwa,

834
00:42:14,800 --> 00:42:17,900
na hivyo kwa sasa, tumekuwa aina ya uandishi omitted

835
00:42:17,900 --> 00:42:21,400
mfano, au tamko la, kuu.

836
00:42:21,400 --> 00:42:23,050
Tumekuwa aliyopewa kuwa na wewe,

837
00:42:23,050 --> 00:42:25,650
na tumekuwa tu alikuwa na wewe kujaza aina ya nafasi zilizoachwa wazi.

838
00:42:25,650 --> 00:42:29,120
>> >> Basi kwa ajili ya kuweka pili tatizo, hatuna haja ya

839
00:42:29,120 --> 00:42:31,350
kuandika ni katika kazi ya pili?

840
00:42:31,350 --> 00:42:34,200
Siamini hivyo.

841
00:42:34,200 --> 00:42:37,600
Naamini ni yote katika hapa.

842
00:42:37,600 --> 00:42:41,710
Yeah, hivyo Kaisari Cipher,

843
00:42:41,710 --> 00:42:45,000
wewe huna, haina kuangalia kama,

844
00:42:48,740 --> 00:42:53,150
na Vigenere, huna aidha,

845
00:42:53,150 --> 00:42:56,400
hivyo - na zinageuka wewe si milele kweli kuwa kuandika

846
00:42:56,400 --> 00:42:58,250
kazi, haki?

847
00:42:58,250 --> 00:43:01,950
Wewe piga daima kuweka yote ya code yako ndani ya kuu,

848
00:43:01,950 --> 00:43:04,500
na programmers wengi kufanya hivyo.

849
00:43:04,500 --> 00:43:07,130
Kama sisi kusonga mbele,

850
00:43:07,130 --> 00:43:09,480
sisi kuanza kazi kama njia ya kuanzisha

851
00:43:09,480 --> 00:43:11,530
kusafisha code yako,

852
00:43:11,530 --> 00:43:13,380
kufanya hivyo zaidi ya kifahari,

853
00:43:13,380 --> 00:43:16,890
katika kesi una kazi - aina ya kama wakati kuongelea tanzi,

854
00:43:16,890 --> 00:43:20,400
jinsi wakati mwingine kuna mambo ambayo unataka kufanya tena na tena na tena,

855
00:43:20,400 --> 00:43:23,510
na wewe kuwa na aina ya njia naive -

856
00:43:23,510 --> 00:43:26,360
au kile sisi mara nyingi huita "majani mtu" ufumbuzi,

857
00:43:26,360 --> 00:43:29,390
ni nakala tu na kuweka tena na tena -

858
00:43:29,390 --> 00:43:31,000
unaweza kufanya kitu kimoja na kazi ambapo wewe tu nakala na kuweka

859
00:43:31,000 --> 00:43:33,360
code sawa juu na juu tena,

860
00:43:33,360 --> 00:43:35,750
lakini kwamba bloats code yako -

861
00:43:35,750 --> 00:43:38,550
inaishia kufanya code yako kweli kwa muda mrefu -

862
00:43:38,550 --> 00:43:41,550
na pia anapata utata kidogo,

863
00:43:41,550 --> 00:43:43,470
na basi ina maana kwamba huwezi kupenda -

864
00:43:43,470 --> 00:43:45,250
kama wewe milele unataka kutumia code tena katika mpango mwingine,

865
00:43:45,250 --> 00:43:48,610
wewe pia kukwama kuiga na pasting tena,

866
00:43:48,610 --> 00:43:51,170
hivyo moja ya mambo tutaweza kuzungumzia ni

867
00:43:51,170 --> 00:43:54,960
aina ya kubuni na mtindo wa programu yako,

868
00:43:54,960 --> 00:43:57,010
na hivyo wakati inafanya hisia aina ya

869
00:43:57,010 --> 00:43:59,800
mfuko kitu juu na kuiweka kama kazi tofauti,

870
00:43:59,800 --> 00:44:02,080
tunakuhimiza kufanya hivyo,

871
00:44:02,080 --> 00:44:04,700
na kwamba ni jambo ambalo, tena,

872
00:44:04,700 --> 00:44:07,790
hakuna utawala ngumu na ya haraka.

873
00:44:07,790 --> 00:44:11,540
Sisi mara chache kusema kwamba lazima kuandika kazi kuitwa hii,

874
00:44:12,870 --> 00:44:16,320
lakini ni zaidi ya moja ya mambo hayo wewe tu kuendeleza zaidi ya muda

875
00:44:16,320 --> 00:44:19,470
kama wewe kuandika mipango zaidi na zaidi.

876
00:44:21,940 --> 00:44:24,790
>> Tena maswali?

877
00:44:26,340 --> 00:44:30,610
Sawa, hivyo hebu sasa

878
00:44:30,610 --> 00:44:34,750
kwenda nyuma juu ya guy haki hii hapa,

879
00:44:34,750 --> 00:44:37,800
hivyo mimi nina bado katika sehemu hii ya maswali.

880
00:44:37,800 --> 00:44:39,900
Tumekuwa kuongelea haya wale wote tofauti,

881
00:44:39,900 --> 00:44:42,050
nini kazi, kwa nini kuandika kazi,

882
00:44:42,050 --> 00:44:44,700
wakati unaweza tu nakala na kuweka?

883
00:44:44,700 --> 00:44:47,700
Hopefully tumekuwa ameshawishika kwamba kuandika kazi ni jambo jema.

884
00:44:47,700 --> 00:44:50,870
Hivyo sasa hebu hoja juu ya mpango huu MySpace,

885
00:44:50,870 --> 00:44:53,080
na tutaweza kutumia muda kidogo kufanya hivi.

886
00:44:54,600 --> 00:44:56,480
>> Hivyo, hebu angalia,

887
00:44:56,480 --> 00:45:00,230
naweza kuwa mtu kusoma kwa ajili yangu?

888
00:45:02,640 --> 00:45:04,660
Hebu kuwa na Mikhaila - hii itakuwa kusoma kwa ajili yetu?

889
00:45:07,660 --> 00:45:08,890
>> You maana nyuma wakati MySpace -

890
00:45:08,890 --> 00:45:10,920
Nyuma wakati MySpace ilikuwa baridi.

891
00:45:10,920 --> 00:45:12,070
>> "Nyuma wakati MySpace ilikuwa baridi,

892
00:45:12,070 --> 00:45:14,900
ilikuwa chuki yote ya aina kama hii.

893
00:45:14,900 --> 00:45:17,320
Labda bado ni? Mimi nina uhakika kabisa.

894
00:45:17,320 --> 00:45:19,990
Katika hali yoyote, kwa kutumia Appliance CS50,

895
00:45:19,990 --> 00:45:22,600
CS50 Run, au Spaces CS50,

896
00:45:22,600 --> 00:45:25,370
kuandika mpango kwamba humshauri mtumiaji kwa ajili ya ujumbe

897
00:45:25,370 --> 00:45:29,350
na kisha matokeo ujumbe na barua yake ya kwanza ya mtaji,

898
00:45:29,350 --> 00:45:31,800
pamoja na barua nyingine zote katika kesi alternating,

899
00:45:31,800 --> 00:45:34,010
kama kwa pato sampuli chini,

900
00:45:34,010 --> 00:45:37,060
ambamo Nakala boldfaced inawakilisha pembejeo baadhi ya mtumiaji.

901
00:45:37,060 --> 00:45:39,800
Kwa unyenyekevu, unaweza kudhani kwamba mtumiaji

902
00:45:39,800 --> 00:45:42,810
mapenzi tu pembejeo barua lowercase na mazingira.

903
00:45:42,810 --> 00:45:45,900
Fikiria hili tatizo nafasi ya kufanya mazoezi;

904
00:45:45,900 --> 00:45:48,640
huwezi kuwa na kuulizwa kuwasilisha mpango huu. "

905
00:45:48,640 --> 00:45:51,640
>> Ajabu, asante.

906
00:45:51,640 --> 00:45:54,750
Hivyo kama Mikhaila alisema,

907
00:45:54,750 --> 00:45:58,850
sisi ni kwenda kuandika mpango kwamba MySpaces code yako.

908
00:45:58,850 --> 00:46:02,230
Hivyo hakuwa yoyote ya wewe guys kutumia MySpace?

909
00:46:02,230 --> 00:46:04,100
Yoyote ya kuwa na akaunti MySpace?

910
00:46:04,100 --> 00:46:05,920
Oh, ndio, ndio!

911
00:46:05,920 --> 00:46:08,300
Ni pretty cool.

912
00:46:08,300 --> 00:46:09,950
[Kicheko]

913
00:46:09,950 --> 00:46:12,060
Mimi najua.

914
00:46:12,060 --> 00:46:14,500
Dating mwenyewe.

915
00:46:15,490 --> 00:46:18,300
Hivyo kile sisi ni kujaribu kufanya ni kuandika mpango

916
00:46:18,300 --> 00:46:21,110
kwamba huenda kwa njia ya

917
00:46:21,110 --> 00:46:24,490
na herufi kubwa katika herufi ya kwanza

918
00:46:24,490 --> 00:46:27,140
na kisha baada ya hapo kila barua -

919
00:46:27,140 --> 00:46:29,350
au kila barua nyingine baada ya hapo, samahani.

920
00:46:29,350 --> 00:46:32,910
>> Hivyo - na unaweza kuona katika mfano huu,

921
00:46:32,910 --> 00:46:35,260
hii ni jinsi sisi kukimbia mpango,

922
00:46:35,260 --> 00:46:38,780
na hivyo hii ni kusema tu, "Sisi ni mbio programu inayoitwa a.out.

923
00:46:41,490 --> 00:46:44,630
pembejeo kwamba sisi ni kwenda kutoa ni

924
00:46:44,630 --> 00:46:47,090
ni kwenda kuwa ilisababisha.

925
00:46:47,090 --> 00:46:51,150
Sisi siyo gonna ugavi pembejeo juu ya mstari amri. "

926
00:46:51,150 --> 00:46:54,100
Kama tumekuwa kufuatia mihadhara yote

927
00:46:54,100 --> 00:46:56,710
na kusikia juu ya hoja mstari amri,

928
00:46:57,810 --> 00:47:00,080
kwamba aina ya ambapo wale - kwamba syntax funky

929
00:47:00,080 --> 00:47:04,530
saa kuu huja katika na argc int, mambo ambayo yote,

930
00:47:04,530 --> 00:47:07,630
hivyo hapa sisi siyo kutumia kwamba; sisi siyo kushughulika na yoyote ya kuwa.

931
00:47:09,400 --> 00:47:12,650
Sisi ni tu gonna kupata hii typed katika kwa mtumiaji,

932
00:47:12,650 --> 00:47:15,700
na kisha line hii ya pili na mtaji wa funky

933
00:47:15,700 --> 00:47:18,550
ni nini tunataka programu yetu kwa pato.

934
00:47:19,790 --> 00:47:22,860
>> Hivyo badala ya kutumia Appliance au kukimbia, tutaweza kutumia Spaces,

935
00:47:22,860 --> 00:47:25,360
kwa sababu sisi tumepewa Spaces,

936
00:47:25,360 --> 00:47:28,640
na hivyo kama wewe guys ingekuwa

937
00:47:28,640 --> 00:47:32,380
kupata code yako na kuangalia kitu kama hii,

938
00:47:32,380 --> 00:47:35,930
hivyo mimi nina kwenda kuokoa hii marekebisho

939
00:47:35,930 --> 00:47:38,390
hivyo tu nimepata sahani boiler haki hapa

940
00:47:38,390 --> 00:47:42,840
kwamba inaonekana kama hii, int kuu (utupu), kitu ndani yake.

941
00:47:44,480 --> 00:47:48,460
Kweli, kile tutaweza kufanya ni tutaweza tu kufuta kila kitu wote pamoja.

942
00:47:48,460 --> 00:47:50,330
Tunataka slate tupu,

943
00:47:50,330 --> 00:47:52,470
kwa sababu sisi siyo gonna kuanza kuandika code;

944
00:47:52,470 --> 00:47:55,380
badala yake, sisi ni gonna kujaribu kuandika baadhi pseudocode

945
00:47:55,380 --> 00:47:58,580
ambayo kwa kweli ina maana sisi ni kwenda kuandika kitu ambacho si code

946
00:47:58,580 --> 00:48:01,010
kwamba aina ya inaeleza nini tunataka kufanya,

947
00:48:01,010 --> 00:48:05,180
kinda kama Daudi alivyofanya siku ya kwanza ya hotuba,

948
00:48:05,180 --> 00:48:08,310
au mimi nadhani kwamba ilikuwa siku ya pili ya hotuba wakati yeye alifanya soksi nzima demo.

949
00:48:08,310 --> 00:48:10,990
You guys kukumbuka kwamba - kuona soksi?

950
00:48:10,990 --> 00:48:13,300
Yusufu alikuwa huko aina ya kuandika nje kwa Kiingereza?

951
00:48:13,300 --> 00:48:16,300
Hivyo sisi ni gonna kufanya kitu kimoja.

952
00:48:16,300 --> 00:48:18,380
>> Hivyo wakati mimi kuanza kuandika pseudocode,

953
00:48:18,380 --> 00:48:22,640
Mimi kama kuanza kwa kuangalia nini pembejeo ni kwenda kuwa.

954
00:48:22,640 --> 00:48:24,950
Na mimi kutoa mwenyewe kesi sampuli,

955
00:48:24,950 --> 00:48:28,780
hivyo kama "shukrani kwa ajili ya kuongeza!"

956
00:48:35,030 --> 00:48:38,010
Na kisha mimi pia kuandika nini nataka pato kuwa,

957
00:48:38,010 --> 00:48:42,210
ambayo katika kesi hii ni kitu kama hiki.

958
00:48:53,790 --> 00:48:56,050
Na kwamba aina ya anitiaye nzuri, kama, kuanzia mahali pa kufikiri juu,

959
00:48:56,050 --> 00:48:59,730
"Sawa, nataka kuchukua line 1

960
00:48:59,730 --> 00:49:03,560
na mimi nataka kuigeuza katika mstari 2, "

961
00:49:03,560 --> 00:49:06,570
na kwamba aina ya inasaidia kuongoza kufikiri yangu.

962
00:49:06,570 --> 00:49:09,990
Hii ni nafasi nzuri kuanza.

963
00:49:09,990 --> 00:49:12,190
Njia nyingine ya kufikiri juu yake, pia, kama sisi kinda hoja juu ya

964
00:49:12,190 --> 00:49:15,020
na kama wewe kufanya hili katika programu yako mwenyewe, ni kwa

965
00:49:15,020 --> 00:49:18,530
kufikiri juu ya aina ya kama nini ni kesi makali na hii?

966
00:49:18,530 --> 00:49:20,740
Je, ni aina ya matukio weird?

967
00:49:20,740 --> 00:49:23,660
Je, ni pembejeo weird tupate kupata?

968
00:49:23,660 --> 00:49:26,550
Na kile lazima wale matokeo kuangalia kama?

969
00:49:26,550 --> 00:49:29,670
Kwa mfano, mmoja weird pembejeo

970
00:49:29,670 --> 00:49:33,200
itakuwa hii moja,

971
00:49:33,200 --> 00:49:35,630
kujenga kitu kabisa,

972
00:49:35,630 --> 00:49:37,840
kama kile lazima sisi pato katika kesi hiyo?

973
00:49:37,840 --> 00:49:40,530
Kitu sisi nataka kufikiri kuhusu, pia.

974
00:49:40,530 --> 00:49:44,450
>> Hivyo tu kama swali,

975
00:49:44,450 --> 00:49:46,870
nini kinaweza tunataka pato?

976
00:49:46,870 --> 00:49:50,740
Kama hatuwezi kupata yoyote ya pembejeo wakati wote, nini unapaswa kuwa mpango wetu outputting?

977
00:49:53,740 --> 00:49:54,860
>> Hakuna.

978
00:49:54,860 --> 00:49:57,340
Hakuna kitu? Sauti kubwa.

979
00:49:57,340 --> 00:49:59,280
Hivyo tunataka kuhakikisha kwamba sisi siyo kuandika chochote nje

980
00:49:59,280 --> 00:50:01,500
kama hatuwezi kupata kitu chochote in

981
00:50:01,500 --> 00:50:04,320
Cool. Sawa.

982
00:50:04,320 --> 00:50:07,370
Hivyo

983
00:50:07,370 --> 00:50:09,380
Mimi naenda kuwaita juu ya wanandoa wa watu kama sisi kwenda kwa njia ya

984
00:50:09,380 --> 00:50:12,790
na tu kufikiri aina ya kama nini algorithm ujumla ni

985
00:50:12,790 --> 00:50:15,250
na tutaweza aina ya kuanza kazi kwa njia ya pamoja hii.

986
00:50:16,240 --> 00:50:19,710
>> Hivyo, hebu angalia. Missy.

987
00:50:19,710 --> 00:50:21,220
Unadhani tunatarajia kuanza?

988
00:50:21,220 --> 00:50:24,830
Nini itakuwa nafasi nzuri kuanza hapa

989
00:50:24,830 --> 00:50:27,900
kama tunataka kubadilisha, kusema, mstari 1

990
00:50:27,900 --> 00:50:29,440
katika mstari wa 2?

991
00:50:29,440 --> 00:50:32,650
Je, unaweza tu aina ya kueleza kwangu, kwa Kiingereza, kile unachokifikiria?

992
00:50:32,650 --> 00:50:34,770
Hawana hata wasiwasi kuhusu code.

993
00:50:34,770 --> 00:50:38,250
>> Kitu kwanza napenda kufanya itakuwa

994
00:50:38,250 --> 00:50:41,170
aina ya mtumiaji moja kwa moja na kuwaambia unataka nini.

995
00:50:41,170 --> 00:50:44,730
Okay, kwa hivyo, wanasema,

996
00:50:44,730 --> 00:50:47,450
"Hey, mtumiaji. Nataka

997
00:50:47,450 --> 00:50:50,560
string "- kutisha.

998
00:50:50,560 --> 00:50:52,990
Basi hebu andika hii chini.

999
00:50:52,990 --> 00:50:56,140
Uliza mtumiaji kwa kamba.

1000
00:50:56,140 --> 00:50:59,270
Hii inaonekana kama mwanzo mzuri.

1001
00:51:03,920 --> 00:51:06,460
Wote haki.

1002
00:51:06,460 --> 00:51:09,750
Hebu kuuliza Kelly Ren wakati huu.

1003
00:51:09,750 --> 00:51:11,580
Nini sisi kisha unataka kufanya ijayo?

1004
00:51:11,580 --> 00:51:14,220
Nini aina ya pili yetu -?

1005
00:51:14,220 --> 00:51:18,080
Kusanya >> mchango wao na kuhifadhi kama variable.

1006
00:51:18,080 --> 00:51:20,470
Mkuu.

1007
00:51:20,470 --> 00:51:24,280
Hivyo kukusanya kamba,

1008
00:51:25,450 --> 00:51:27,880
kuhifadhi katika kutofautiana.

1009
00:51:34,840 --> 00:51:36,460
Hivyo ni kuna kitu maalumu tunataka kufanya hapa?

1010
00:51:36,460 --> 00:51:39,700
Je, tunataka kuangalia mchango wao

1011
00:51:39,700 --> 00:51:42,260
kabla -?

1012
00:51:42,260 --> 00:51:43,790
>> Yeah.

1013
00:51:43,790 --> 00:51:46,330
Nini kinaweza tunataka kuangalia kwa?

1014
00:51:46,330 --> 00:51:48,980
>> Naam, wewe alisema hatuna kuangalia kama ni idadi, haki?

1015
00:51:48,980 --> 00:51:52,400
Kwa sababu hiyo itabidi kudhani kwamba ni lowercase?

1016
00:51:52,400 --> 00:51:55,650
Yeah.

1017
00:51:56,380 --> 00:51:58,920
>> Hivyo ni zinageuka kuwa - yeah.

1018
00:51:58,920 --> 00:52:01,850
Hivyo getString ni uhakika wa kurudi kwetu kamba.

1019
00:52:01,850 --> 00:52:05,050
Si kwenda na kurudi idadi kwetu au kitu kama hicho.

1020
00:52:05,050 --> 00:52:09,140
Kunaweza kuwa na tarakimu wahusika ndani ya kamba kwamba, ingawa.

1021
00:52:09,140 --> 00:52:13,460
Na wale, tunaweza kupuuza kama tulivyofanya mtaji.

1022
00:52:13,460 --> 00:52:16,620
Lakini string tupu kabisa faini,

1023
00:52:16,620 --> 00:52:19,900
hivyo kesi haki hapa kwenye mstari 4 na 5,

1024
00:52:19,900 --> 00:52:22,020
haki, ambapo kuna hakuna pembejeo,

1025
00:52:22,020 --> 00:52:25,190
na tumekuwa kuweka kitu kama pato yetu.

1026
00:52:25,190 --> 00:52:28,730
Sisi si kuwa na wasiwasi kuhusu kuhakikisha kwamba kuna kitu katika string

1027
00:52:28,730 --> 00:52:31,840
au kwamba string ni angalau 4 wahusika muda mrefu;

1028
00:52:31,840 --> 00:52:34,190
chochote ni faini.

1029
00:52:34,190 --> 00:52:38,270
Hivyo hii ni kulinganishwa, kwa mfano, na kama mipango pennies kwamba aliandika

1030
00:52:38,270 --> 00:52:42,340
ambapo alikuwa na kuhakikisha walikuwa kupata namba zisizo hasi;

1031
00:52:42,340 --> 00:52:46,430
alikuwa na kuhakikisha kwamba walikuwa kupata idadi sahihi ya siku katika mwezi.

1032
00:52:46,430 --> 00:52:49,630
Na jinsi wewe guys kufanya hivyo?

1033
00:52:49,630 --> 00:52:51,470
Jinsi gani unaweza kufanya kwamba mtihani?

1034
00:52:51,470 --> 00:52:54,090
Nini ambazo zinahitaji wewe kutumia?

1035
00:52:54,090 --> 00:52:55,650
>> Do-wakati matanzi.

1036
00:52:55,650 --> 00:53:00,840
Do-wakati matanzi; aina nyingine ya tanzi, pia, yeah.

1037
00:53:02,190 --> 00:53:04,520
Hivyo zinageuka hatuna kutumia kitanzi katika kesi hii,

1038
00:53:04,520 --> 00:53:07,360
wakati sisi ni uvuvio kwa kamba, ambayo ni aina ya nice.

1039
00:53:08,280 --> 00:53:10,620
>> Yote ya haki, ya kuendelea.

1040
00:53:12,410 --> 00:53:14,270
Hivyo, Stella.

1041
00:53:14,270 --> 00:53:17,530
Unaweza kutuambia kidogo kuhusu nini tunapaswa kufanya ijayo?

1042
00:53:17,530 --> 00:53:20,270
Hivyo sasa sisi tumepewa kamba, sisi tumepewa ni kuhifadhiwa katika variable;

1043
00:53:20,270 --> 00:53:23,360
nini tunahitaji kufanya kwa kamba?

1044
00:53:26,790 --> 00:53:33,530
>> Tunahitaji -

1045
00:53:33,530 --> 00:53:36,550
kutambua 2 -

1046
00:53:36,550 --> 00:53:39,290
Yeah, tu kusema kwa Kiingereza, hiyo ni ya kutisha.

1047
00:53:39,290 --> 00:53:42,670
Tambua >> [inaudible] miji mikuu - au, uppercase.

1048
00:53:44,420 --> 00:53:48,130
Yeah, hivyo ningependa kutambua ambayo ndio ni kubwa na ndogo.

1049
00:53:50,020 --> 00:53:54,180
Hatuwezi uppercase au Herufi za chini yao mpaka tumekuwa kutambuliwa ndio ambayo.

1050
00:54:03,790 --> 00:54:06,350
Hivyo tutaweza kuweka kwamba katika hapa.

1051
00:54:06,350 --> 00:54:10,210
>> Hivyo, tu kufikiri kuhusu mchakato huu,

1052
00:54:10,210 --> 00:54:13,200
jinsi gani sisi kufanya utambulisho huu?

1053
00:54:13,200 --> 00:54:15,050
Unajua, Dan?

1054
00:54:15,050 --> 00:54:18,120
Namna ya nini sisi - kile chombo tunatarajia kuwa na matumizi ya nje ya toolbox yetu?

1055
00:54:18,120 --> 00:54:22,500
>> Ningependa kuiweka katika namna fulani katika safu kama au kila mstari

1056
00:54:22,500 --> 00:54:24,240
ni kidogo yake mwenyewe sanduku,

1057
00:54:24,240 --> 00:54:27,240
na kisha uppercase ni kutoka huko au la.

1058
00:54:27,240 --> 00:54:30,440
Sawa, hivyo moja chombo tunaweza kutumia ni safu.

1059
00:54:30,440 --> 00:54:33,760
Tufanye nini na kuangalia katika kamba,

1060
00:54:33,760 --> 00:54:36,680
ingawa, kwa takwimu nje - tulikuwa na kuangalia wahusika.

1061
00:54:36,680 --> 00:54:40,890
>> Basi nimepata kuangalia urefu wa kamba?

1062
00:54:40,890 --> 00:54:43,880
Yeah, hivyo sehemu ya kwamba ni kupata urefu wa kamba.

1063
00:54:50,450 --> 00:54:54,150
Tu nje ya udadisi, nini sisi kutumia ili kupata urefu wa kamba?

1064
00:54:54,150 --> 00:54:58,080
>> Strlen?

1065
00:54:58,080 --> 00:55:02,870
Yeah, strlen; sisi wito huu "strlen"

1066
00:55:04,180 --> 00:55:08,620
Kwa haya yote kamba, hivyo strlen ni kazi,

1067
00:55:08,620 --> 00:55:10,670
na ni super Handy, kwa sababu tunaweza kuitumia tu kusema,

1068
00:55:10,670 --> 00:55:13,430
Hey, strlen: Hapa ni kamba, niambie ni muda gani.

1069
00:55:13,430 --> 00:55:17,350
Katika hotuba ya leo, Daudi aliongea mengi kuhusu jinsi strlen ni kutekelezwa,

1070
00:55:17,350 --> 00:55:20,370
nini kweli kinachoendelea nyuma ya pazia.

1071
00:55:20,370 --> 00:55:25,450
Lakini hii ni moja ya wale sana super Handy.

1072
00:55:25,450 --> 00:55:29,170
Kuna wengine ndio kwamba ni pia katika maktaba kamba,

1073
00:55:29,170 --> 00:55:34,690
kama vile strcmp, ambayo yameandikwa "strcmp",

1074
00:55:34,690 --> 00:55:38,010
ambayo hutumiwa na kulinganisha masharti kwa kila mmoja.

1075
00:55:41,220 --> 00:55:45,020
Wale wengine utatumia kama strstr,

1076
00:55:45,020 --> 00:55:48,770
ambayo ni nzuri kwa ajili ya kutafuta masharti ndogo na kadhalika.

1077
00:55:48,770 --> 00:55:53,380
Kwa sehemu kubwa, wao wote kuanza na str na kisha kwenda kwenye kuwa kitu kingine.

1078
00:55:53,380 --> 00:55:57,080
sababu wao si kweli Spell yao kama kamba na kadhalika

1079
00:55:57,080 --> 00:56:00,260
ni kwa sababu nyuma katika kama siku za mwanzo za C,

1080
00:56:00,260 --> 00:56:04,100
wakati watu walikuwa wa kwanza kuandika na wote,

1081
00:56:04,100 --> 00:56:07,580
walikuwa na mapungufu kwenye idadi ya herufi kwamba unaweza kutumia

1082
00:56:07,580 --> 00:56:09,950
kwa ajili ya kazi majina na majina variable,

1083
00:56:09,950 --> 00:56:12,620
hivyo kila kitu ni kama super kufupishwa.

1084
00:56:12,620 --> 00:56:15,750
Lakini wakati wowote, unaweza kuona kitu ambacho kinaanza na str,

1085
00:56:15,750 --> 00:56:18,600
kwamba kwa kawaida maana hii ina kitu cha kufanya na kamba.

1086
00:56:20,990 --> 00:56:23,350
>> Okay, kwa hivyo nimepata kupata urefu wa kamba,

1087
00:56:23,350 --> 00:56:27,110
na kisha, tunafanya nini kwa wahusika?

1088
00:56:27,110 --> 00:56:29,020
Unajua, Sam?

1089
00:56:29,020 --> 00:56:32,410
>> Mimi sielewi, mimi alikuwa anajaribu ukafikirie.

1090
00:56:32,410 --> 00:56:35,410
Mimi kwa kweli sijui - I wish kulikuwa na baadhi ya njia ya -

1091
00:56:35,410 --> 00:56:38,990
I mean, napenda kufikiri labda tunaweza kufanya kitu kwa tabia mbaya na evens,

1092
00:56:38,990 --> 00:56:40,860
lakini sijui ya kazi yoyote kama hiyo.

1093
00:56:40,860 --> 00:56:42,240
Yeah.

1094
00:56:43,160 --> 00:56:45,200
>> Lakini kwamba - itakuwa si lazima kufanya kazi,

1095
00:56:45,200 --> 00:56:48,690
kwa sababu kisha ungependa kupata nafasi ya kuwa -

1096
00:56:48,690 --> 00:56:51,130
ungependa kuwa na nafasi ya kupata tips juu ya jinsi -

1097
00:56:51,130 --> 00:56:54,310
Sawa.

1098
00:56:54,310 --> 00:56:56,490
>> Sijui - aina I'm ya waliopotea katika hatua hii.

1099
00:56:56,490 --> 00:56:58,120
Yeah - hapana, hapana, hapana, hizi ni nzuri pointi.

1100
00:56:58,120 --> 00:57:00,420
Basi nini tunahitaji kufanya ni, kama Sam alisema,

1101
00:57:00,420 --> 00:57:02,970
tunahitaji kufuatilia ni barua ni barua isiyo ya kawaida,

1102
00:57:02,970 --> 00:57:05,540
na ambayo ndio ni barua hata.

1103
00:57:06,650 --> 00:57:09,090
Lakini tunataka kuhakikisha sisi siyo tu kuangalia

1104
00:57:09,090 --> 00:57:12,110
saa isiyo ya kawaida na hata

1105
00:57:12,110 --> 00:57:14,030
fahirisi katika kamba,

1106
00:57:14,030 --> 00:57:17,660
lakini badala ya kuangalia barua isiyo ya kawaida na hata katika kamba,

1107
00:57:17,660 --> 00:57:20,190
hivyo tunahitaji kuwa na kinda hii tofauti kati ya

1108
00:57:20,190 --> 00:57:25,190
barua - kama yale ya kweli, B, C, D, au kadhalika,

1109
00:57:25,190 --> 00:57:29,090
na mambo si barua lakini bado katika kamba yetu.

1110
00:57:29,090 --> 00:57:32,390
Kwa mfano hapa, kama hatua hii ni Moderators si barua,

1111
00:57:32,390 --> 00:57:36,060
lakini bado ni sehemu ya kamba yetu; bado Char.

1112
00:57:36,060 --> 00:57:38,820
Aidha, wote wa maeneo haya -

1113
00:57:38,820 --> 00:57:41,710
haina maana kufanya capitalize nafasi, haki?

1114
00:57:41,710 --> 00:57:46,160
Hivyo tunataka kuhakikisha kwamba sisi kwa namna fulani ruka wale

1115
00:57:46,160 --> 00:57:49,410
wakati bado kufuatilia tabia mbaya na evens.

1116
00:57:50,900 --> 00:57:54,990
>> Hivyo aina ya programu katika toolbox wetu

1117
00:57:54,990 --> 00:57:57,270
hivyo mbali, kama wewe,

1118
00:57:57,270 --> 00:58:01,310
tuna idadi ya zana mbalimbali kwamba tumekuwa kuzungumzwa.

1119
00:58:01,310 --> 00:58:04,640
Basi mmoja, kwa mfano, ni vigezo,

1120
00:58:04,640 --> 00:58:07,120
kama tumekuwa kuongelea hapa.

1121
00:58:07,120 --> 00:58:10,730
Mwingine chombo tumekuwa aliyesema kuhusu ni kazi.

1122
00:58:10,730 --> 00:58:15,800
Hivyo tumekuwa aliyesema kuhusu vigezo katika pseudocode wetu hapa

1123
00:58:15,800 --> 00:58:19,760
kama nini tuko kwenda kutumia kamba ya kuhifadhi yetu.

1124
00:58:19,760 --> 00:58:24,630
Tumekuwa aliyesema kuhusu kazi ya kupata urefu wa kamba, kama strlen.

1125
00:58:28,510 --> 00:58:31,170
Sisi tumekuwa kuzungumza juu ya kitu kingine, na tumekuwa aliyesema kuhusu hilo

1126
00:58:31,170 --> 00:58:34,850
kwa ajili ya kura mapema katika sehemu leo: matanzi.

1127
00:58:39,390 --> 00:58:42,030
>> Nini guys kufikiri kuhusu kutumia kitanzi katika mpango huu?

1128
00:58:42,030 --> 00:58:44,110
Yaredi, unafikiri nini?

1129
00:58:47,150 --> 00:58:50,030
Je, sisi kutumia kitanzi katika mpango huu?

1130
00:58:50,030 --> 00:58:52,500
>> Pengine si, hapana, kwa sababu huna kwenda kwa njia hiyo zaidi ya mara moja.

1131
00:58:52,500 --> 00:58:55,260
Okay, huna kupitia nini zaidi ya mara moja?

1132
00:58:55,260 --> 00:58:57,190
>> String nzima.

1133
00:58:57,190 --> 00:59:00,660
Haki, hivyo huna kupitia string nzima mara moja.

1134
00:59:00,660 --> 00:59:03,330
Samahani kwamba alifanya kabisa hakuna hisia!

1135
00:59:03,330 --> 00:59:06,360
Huna kupitia string nzima zaidi ya mara moja.

1136
00:59:06,360 --> 00:59:08,660
Sawa.

1137
00:59:09,790 --> 00:59:11,920
Unafikiri?

1138
00:59:11,920 --> 00:59:14,110
>> Nafikiri ni vema kutumia yao

1139
00:59:14,110 --> 00:59:16,640
hivyo tunaweza kufanya kama capitalize wakati

1140
00:59:16,640 --> 00:59:19,750
eneo la ni [inaudible] idadi.

1141
00:59:19,750 --> 00:59:22,940
Mkuu, na hivyo capitalize nini?

1142
00:59:22,940 --> 00:59:25,200
Okay, kwa hivyo sisi ni kusema kwamba

1143
00:59:25,200 --> 00:59:28,130
tunapaswa kutumia kitanzi kwa sababu tunataka

1144
00:59:28,130 --> 00:59:32,550
herufi wakati si idadi.

1145
00:59:35,130 --> 00:59:37,140
Hivyo - sorry, je, unataka kuongeza?

1146
00:59:37,140 --> 00:59:39,340
>> Mimi alikuwa anaenda kusema kwamba usiyesaidia string

1147
00:59:39,340 --> 00:59:42,290
na ni [inaudible] tofauti [inaudible] juu ya wahusika?

1148
00:59:42,290 --> 00:59:43,710
Yeah.

1149
00:59:43,710 --> 00:59:45,850
>> Na kisha tunaweza hawawajui idadi ya -

1150
00:59:45,850 --> 00:59:47,780
au kulingana na eneo la barua katika kamba?

1151
00:59:47,780 --> 00:59:49,720
Yeah.

1152
00:59:49,720 --> 00:59:53,640
>> Na kubaini kama ni odd au hata na capitalize barua yenyewe

1153
00:59:53,640 --> 00:59:57,750
wakati eneo la barua ni [inaudible] - sorry.

1154
00:59:57,750 --> 01:00:00,150
Mkuu.

1155
01:00:00,150 --> 01:00:03,430
>> Hivyo tu recap.

1156
01:00:03,430 --> 01:00:05,840
Je, unaweza kuwakumbusha yangu ya jina lako tena - I'm sorry.

1157
01:00:05,840 --> 01:00:06,900
>> Charlotte.

1158
01:00:06,900 --> 01:00:08,490
Charlotte, okay.

1159
01:00:08,490 --> 01:00:11,130
Basi nini Charlotte ni kusema,

1160
01:00:11,130 --> 01:00:14,950
ambayo ni haki kabisa - gosh, hii kinapenda auto Indent juu yangu -

1161
01:00:14,950 --> 01:00:17,770
ni kwamba kama sisi kuangalia string

1162
01:00:17,770 --> 01:00:19,160
vile kama hii moja kwa juu -

1163
01:00:19,160 --> 01:00:21,590
"Asante kwa kuongeza" -

1164
01:00:21,590 --> 01:00:24,790
kama mlolongo wa wahusika

1165
01:00:24,790 --> 01:00:29,010
ambapo ni katika nafasi 0,

1166
01:00:29,010 --> 01:00:32,260
h ni katika nafasi ya 1.

1167
01:00:32,260 --> 01:00:36,880
ni saa 2, basi sisi got 3, 4, 5;

1168
01:00:36,880 --> 01:00:40,830
nafasi ni katika nafasi ya 6.

1169
01:00:42,380 --> 01:00:45,300
Wakati - nini msimamo wa f?

1170
01:00:45,300 --> 01:00:47,610
7!

1171
01:00:47,610 --> 01:00:49,300
O? 8.

1172
01:00:49,300 --> 01:00:52,070
R? 9.

1173
01:00:52,070 --> 01:00:54,340
Na kisha sisi tumepewa 10, na kisha siwezi kuandika bila

1174
01:00:54,340 --> 01:00:57,430
kinda kupata messy kwenye screen.

1175
01:00:57,430 --> 01:01:02,340
Lakini hii ni kweli ni jinsi gani tunaweza kuzungumzia masharti katika kumbukumbu.

1176
01:01:02,340 --> 01:01:04,660
Je, ni kamba

1177
01:01:04,660 --> 01:01:07,920
ni mlolongo wa wahusika,

1178
01:01:07,920 --> 01:01:12,430
na wakati sisi rejea tabia ya mtu binafsi katika kamba,

1179
01:01:12,430 --> 01:01:15,280
sisi mara nyingi kufanya hivyo kwa kurejea msimamo kuwa na tabia ya

1180
01:01:15,280 --> 01:01:17,620
ndani ya kamba,

1181
01:01:17,620 --> 01:01:19,910
pengine njia sawa kwamba sisi majadiliano juu ya Septemba

1182
01:01:19,910 --> 01:01:22,870
kuwa mwezi wa tisa wa mwaka

1183
01:01:22,870 --> 01:01:27,730
au Jumatatu kuwa siku ya kwanza ya wiki.

1184
01:01:29,280 --> 01:01:33,070
Hivyo hii inatupatia njia ya

1185
01:01:33,070 --> 01:01:37,030
takwimu nje ambayo ndio ni odd dhidi hata

1186
01:01:37,030 --> 01:01:39,540
kwa sababu unaweza kuona hapa,

1187
01:01:39,540 --> 01:01:43,640
kama sisi mechi yake juu na T hii,

1188
01:01:46,310 --> 01:01:49,360
unaweza kuona kwamba wote wa wale mtaji

1189
01:01:49,360 --> 01:01:53,040
ni katika nafasi hata,

1190
01:01:53,040 --> 01:01:55,880
angalau kwa neno la kwanza,

1191
01:01:55,880 --> 01:01:59,080
na kisha mambo kupata kutupwa mbali mara moja sisi hit kwamba nafasi,

1192
01:01:59,080 --> 01:02:02,460
kwa sababu sisi wala kuhesabu nafasi hii kama barua,

1193
01:02:02,460 --> 01:02:05,150
hivyo ni kama sisi kuanza

1194
01:02:05,150 --> 01:02:08,930
akaenda 0, 1, 2, 3, 4, 5,

1195
01:02:08,930 --> 01:02:12,600
nafasi, 6, 7, 8, nafasi,

1196
01:02:12,600 --> 01:02:16,440
9, na kisha 10, 11, 12, na kadhalika.

1197
01:02:19,300 --> 01:02:22,910
>> Cool, hivyo sisi dhahiri atataka kutumia aina fulani ya kitanzi

1198
01:02:22,910 --> 01:02:27,760
kwenda juu ya kila mmoja wa wahusika katika zamu.

1199
01:02:31,330 --> 01:02:34,580
Hivyo katika hatua hii,

1200
01:02:36,490 --> 01:02:38,360
tutaweza kurudi pseudocode yetu ya zamani hapa.

1201
01:02:40,970 --> 01:02:42,650
Kama sehemu ya utambulisho huu wa wale ambao

1202
01:02:42,650 --> 01:02:45,350
ni kubwa na ambayo ndio ni lowercase,

1203
01:02:45,350 --> 01:02:48,340
tutaweza unataka kufanya hivi katika baadhi ya aina ya kitanzi.

1204
01:02:51,080 --> 01:02:53,390
Kitanzi, koloni.

1205
01:02:55,070 --> 01:03:01,220
Ni aina gani ya kitanzi, nje ya aina ya matanzi kwamba tuna,

1206
01:03:01,220 --> 01:03:03,670
inaonekana kuwa moja nzuri ya kutumia katika kesi hii?

1207
01:03:03,670 --> 01:03:05,610
>> Nilikuwa kufikiri kwa kitanzi.

1208
01:03:05,610 --> 01:03:07,500
Na kwa nini ni wewe kufikiria kwa kitanzi?

1209
01:03:07,500 --> 01:03:10,000
>> Sababu kuanza saa sifuri, na kisha

1210
01:03:10,000 --> 01:03:13,000
wakati sisi kufikia urefu wa kamba,

1211
01:03:13,000 --> 01:03:16,170
na kisha kila iteration unaweza [inaudible], pia?

1212
01:03:16,170 --> 01:03:18,260
Yeah, kwa uhakika.

1213
01:03:18,260 --> 01:03:21,490
Hivyo, nje ya uchaguzi tofauti ya tanzi,

1214
01:03:21,490 --> 01:03:25,350
tuna kwa tanzi, wakati tanzi, na kufanya-wakati matanzi.

1215
01:03:25,350 --> 01:03:28,550
Ambapo kwa kitanzi ni muhimu hasa

1216
01:03:28,550 --> 01:03:32,120
ni wakati unataka kujua

1217
01:03:32,120 --> 01:03:34,940
aina ya ambapo wewe saa katika kitanzi,

1218
01:03:34,940 --> 01:03:38,520
mara ngapi kitanzi imekuwa kunyongwa hadi sasa.

1219
01:03:38,520 --> 01:03:42,490
Ambayo ni hasa kile tunataka kujua katika hali hii,

1220
01:03:42,490 --> 01:03:44,640
kama Kelly alisema,

1221
01:03:44,640 --> 01:03:47,400
msingi mbali ya maoni Charlotte wa awali kwamba tunataka kujua msimamo

1222
01:03:47,400 --> 01:03:49,900
wa tabia ndani ya kamba,

1223
01:03:49,900 --> 01:03:51,750
na kwa kitanzi atatupa tu kwamba,

1224
01:03:51,750 --> 01:03:54,680
kwa sababu kama sisi kuanza aina ya kuangalia nyuma katika string yetu,

1225
01:03:54,680 --> 01:03:57,140
kama tunataka kuanza kitanzi yetu kwa saa 0,

1226
01:03:57,140 --> 01:04:00,350
na sisi kwenda juu kupitia urefu wa kamba nzima,

1227
01:04:00,350 --> 01:04:04,740
basi tunaweza kushirikiana Simu barua

1228
01:04:04,740 --> 01:04:08,110
na 0 katika yetu kwa kitanzi,

1229
01:04:09,950 --> 01:04:13,080
barua H kwa 1 katika kwa kitanzi yetu, na kadhalika,

1230
01:04:13,080 --> 01:04:16,600
kwenda njia yote kwa njia ya mwisho ya kamba.

1231
01:04:18,810 --> 01:04:21,890
>> Basi hebu kuanza coding hii kidogo tu

1232
01:04:21,890 --> 01:04:24,930
hivyo tu guys kupata kujisikia kwa nini hii inaonekana kama.

1233
01:04:24,930 --> 01:04:27,980
Mimi naenda kuwaokoa hii,

1234
01:04:27,980 --> 01:04:31,230
hivyo sisi tumepewa code yetu Pseudo katika hapa,

1235
01:04:33,490 --> 01:04:38,120
na mimi naenda kufuta kila kitu.

1236
01:04:38,120 --> 01:04:42,210
Hivyo nina slate tupu.

1237
01:04:42,210 --> 01:04:45,910
Mimi nina gonna kuanza kwa kuandika int kuu (utupu)

1238
01:04:45,910 --> 01:04:48,440
{

1239
01:04:48,440 --> 01:04:51,380
Mimi nina gonna kuweka 0 kurudi katika

1240
01:04:51,380 --> 01:04:53,320
na kisha}.

1241
01:04:53,320 --> 01:04:56,130
Hivyo kwa kawaida wakati mimi kuanza kwa mpango, hii ni nini mimi kuanza na.

1242
01:04:56,130 --> 01:04:59,370
Mimi utajiokoa hivyo kwamba wewe guys kuwa nayo.

1243
01:05:06,290 --> 01:05:08,440
Hivyo moja ya mambo ya kwanza kuongelea ilikuwa

1244
01:05:08,440 --> 01:05:10,920
kupata pembejeo kutoka kwa mtumiaji

1245
01:05:10,920 --> 01:05:13,740
na hifadhi hiyo katika kamba.

1246
01:05:13,740 --> 01:05:16,420
Jinsi gani sisi kupata mawazo kutoka kwa watumiaji?

1247
01:05:16,420 --> 01:05:19,640
>> GetString.

1248
01:05:19,640 --> 01:05:21,870
GetString, wote haki.

1249
01:05:23,150 --> 01:05:26,820
Hivyo kama ninapoandika GetString ()

1250
01:05:26,820 --> 01:05:32,150
na semicolon.

1251
01:05:32,150 --> 01:05:36,630
Hebu jaribu mbio hii; mapenzi hii kukimbia, kwanza ya yote?

1252
01:05:36,630 --> 01:05:38,430
Na kwa nini hii si kukimbia?

1253
01:05:38,430 --> 01:05:40,090
>> Una kutangaza kutofautiana.

1254
01:05:40,090 --> 01:05:43,040
Nina kutangaza kutofautiana. Sawa.

1255
01:05:43,040 --> 01:05:45,700
>> Hivyo ni jinsi gani mimi kufanya hivyo?

1256
01:05:45,700 --> 01:05:48,400
Je, wewe akili kuandika kitu, kugawana?

1257
01:05:48,400 --> 01:05:51,270
Na kisha tunaweza kuvuta it up.

1258
01:05:51,270 --> 01:05:54,630
Hebu angalia, Dan, haki, sawa.

1259
01:05:54,630 --> 01:05:59,100
Au Daniel. Nakili kwamba katika, pembejeo string = GetString ().

1260
01:05:59,100 --> 01:06:01,340
Ajabu.

1261
01:06:01,340 --> 01:06:02,890
Je hili kukimbia?

1262
01:06:02,890 --> 01:06:05,210
Hebu jaribu hilo.

1263
01:06:05,210 --> 01:06:08,890
Hit kukimbia, uploading chanzo code, jengo, kosa ilitokea.

1264
01:06:08,890 --> 01:06:11,040
Sawa.

1265
01:06:11,040 --> 01:06:14,950
Hivyo whats kinaendelea hapa?

1266
01:06:14,950 --> 01:06:18,700
Matumizi ya 'kamba' Undeclared kitambulisho.

1267
01:06:18,700 --> 01:06:22,840
>> Tuna kwa pamoja na maktaba?

1268
01:06:22,840 --> 01:06:25,130
Yeah, hivyo Dan akisema tuna ni maktaba.

1269
01:06:25,130 --> 01:06:28,270
Ni kwamba nini walikuwa kwenda kusema, Stella? Ajabu.

1270
01:06:29,450 --> 01:06:31,430
Hiyo ni ya kushangaza, hivyo Stella, unaweza

1271
01:06:31,430 --> 01:06:34,800
nakala hii code nje ya Space Danieli?

1272
01:06:34,800 --> 01:06:37,580
Ikiwa bonyeza Daniel Roland Ki, nakala yake,

1273
01:06:37,580 --> 01:06:41,360
na kisha itakuwa ya kuweka line ni pamoja na katika, na kisha kuokoa kumtoa?

1274
01:06:46,580 --> 01:06:49,360
Napenda kujua wakati uko tayari.

1275
01:06:57,160 --> 01:06:59,490
Hivyo hii ni pamoja na syntax pia ni aina ya funky;

1276
01:06:59,490 --> 01:07:02,210
kuna kama tag kwamba hash,

1277
01:07:02,210 --> 01:07:05,760
na kuna ni pamoja na, na kisha kuna haya mabano pembeni.

1278
01:07:12,490 --> 01:07:15,360
Unakumbuka jinsi kazi hii, au lazima mimi kuiweka juu ya kanuni hii hapa hapa?

1279
01:07:15,360 --> 01:07:17,850
>> Mimi nina nzuri.

1280
01:07:17,850 --> 01:07:19,810
Sawa.

1281
01:07:19,810 --> 01:07:23,260
>> Mimi ni printed - sikuwa na uhakika ambayo maktaba, ingawa.

1282
01:07:23,260 --> 01:07:25,570
Oh, sawa - yeah, hivyo ni maktaba CS50.

1283
01:07:25,570 --> 01:07:27,660
>> Oh, mimi kuweka maktaba stdio.

1284
01:07:27,660 --> 01:07:30,950
>> Oh, got it - yeah, hakuna, that's -

1285
01:07:30,950 --> 01:07:34,380
hivyo ni zinageuka kuwa string ni kweli kitu ambacho ni maalum kwa CS50.

1286
01:07:36,590 --> 01:07:41,240
Kuna kweli si kweli kamba ya aina

1287
01:07:41,240 --> 01:07:45,000
kwa sababu haki hapa, kamba ni katika nafasi ya aina, -

1288
01:07:45,000 --> 01:07:49,140
sisi ni kutangaza variable kuitwa pembejeo ya kamba ya aina -

1289
01:07:49,140 --> 01:07:53,320
na sisi ni kuweka ndani ya pembejeo

1290
01:07:53,320 --> 01:07:58,440
thamani ya kwamba anapata akarudi kwetu: pato ya wito huu GetString kazi.

1291
01:07:58,440 --> 01:08:02,910
Unaweza kuwaambia huu ni mwito kazi kwa sababu ni got mabano, kama printf gani,

1292
01:08:02,910 --> 01:08:05,920
tu kama strlen gani.

1293
01:08:05,920 --> 01:08:09,860
Lakini string ni kweli si aina halisi

1294
01:08:09,860 --> 01:08:11,760
katika lugha C.

1295
01:08:11,760 --> 01:08:15,710
Tumekuwa alifanya hivyo katika aina, na tutaweza kuchukua kuhusu nini zaidi, ni kweli ni

1296
01:08:15,710 --> 01:08:19,000
katika C, kwa sababu kuna njia ya kufanya kazi na masharti;

1297
01:08:19,000 --> 01:08:22,479
tumekuwa tu amefanya kitu kufanya ni kuangalia kidogo nicer.

1298
01:08:22,479 --> 01:08:25,240
>> Hivyo hapa sisi kwenda.

1299
01:08:25,240 --> 01:08:28,439
Hapa ni code Stella wa.

1300
01:08:28,439 --> 01:08:32,470
Ni got # pamoja <cs50.h>.

1301
01:08:32,470 --> 01:08:36,390
Watu wengine hii ni pamoja na kuwaita kama hash wakati mwingine au mkali pamoja.

1302
01:08:36,390 --> 01:08:39,580
Sasa tunaweza kuanza yake, kukimbia,

1303
01:08:39,580 --> 01:08:43,649
na sisi bado kupata kosa.

1304
01:08:43,649 --> 01:08:46,290
Hebu kuona nini kinatokea.

1305
01:08:48,069 --> 01:08:50,569
"Outnyttjade variable 'pembejeo."

1306
01:08:50,569 --> 01:08:53,350
Sawa, hivyo kwamba ni baridi, hiyo ni cool.

1307
01:08:53,350 --> 01:08:55,859
I mean, ni si kweli baridi,

1308
01:08:55,859 --> 01:08:57,930
kwa sababu sisi ni kupata hitilafu na si kukimbia,

1309
01:08:57,930 --> 01:09:00,410
lakini jambo hili ni kusema ni kwamba

1310
01:09:00,410 --> 01:09:03,130
sisi si kutumika variable yetu, ambayo hufanya akili.

1311
01:09:03,130 --> 01:09:06,090
Sisi si walijaribu kufanya kitu chochote kwa hayo.

1312
01:09:07,819 --> 01:09:10,490
Hii ni njia ambayo

1313
01:09:10,490 --> 01:09:14,170
Clang ni kujaribu kusaidia sisi kuhakikisha kwamba sisi siyo tu kwa kutumia vigezo

1314
01:09:14,170 --> 01:09:18,819
na kisha inadvertently kuwaita kitu kingine baadaye katika kanuni zetu,

1315
01:09:18,819 --> 01:09:21,649
kutusaidia kuepuka makosa kwa njia hiyo.

1316
01:09:23,130 --> 01:09:28,810
>> Haki zote, hivyo sisi tumepewa pembejeo kutoka kwa mtumiaji,

1317
01:09:28,810 --> 01:09:31,910
sisi ni kuhifadhiwa katika kutofautiana.

1318
01:09:31,910 --> 01:09:34,569
Hatua ya pili ilikuwa kisha

1319
01:09:34,569 --> 01:09:37,609
kuanza kuangalia yote ya wahusika katika string

1320
01:09:37,609 --> 01:09:41,830
na kutambua ambayo ndio ni kuwa uppercase

1321
01:09:41,830 --> 01:09:44,600
na ambayo ndio ni kuwa lowercase.

1322
01:09:44,600 --> 01:09:49,439
Na kama Kelly na Charlotte nililelewa,

1323
01:09:49,439 --> 01:09:52,340
hatuwezi kutumia hii kwa kitanzi.

1324
01:09:52,340 --> 01:09:55,520
Hivyo haina mtu yeyote kumbuka syntax ya kwa kitanzi

1325
01:09:55,520 --> 01:09:58,670
na napenda kuchukua kumchoma katika kuandika tu

1326
01:09:58,670 --> 01:10:03,170
mstari wa kwanza wa kwa kitanzi, tu kwa kidogo?

1327
01:10:05,740 --> 01:10:07,330
Kelly, unataka kutoa ni kujaribu?

1328
01:10:07,330 --> 01:10:10,300
>> Yeah, hivyo una initialize kwanza,

1329
01:10:10,300 --> 01:10:13,170
hivyo mimi kuweka i = 0,

1330
01:10:13,170 --> 01:10:15,390
na kisha mimi i <strlen ().

1331
01:10:15,390 --> 01:10:18,570
Je, ni katika Space zenu - inaweza mimi vuta it up?

1332
01:10:18,570 --> 01:10:21,330
>> Yeah, mimi Star up kidogo, lakini yeah.

1333
01:10:21,330 --> 01:10:24,180
>> Okay, hebu vuta it up.

1334
01:10:24,180 --> 01:10:26,490
Ajabu.

1335
01:10:26,490 --> 01:10:29,510
>> Lakini basi mimi sikujua kama alikuwa na kwamba -

1336
01:10:29,510 --> 01:10:32,180
Yeah, okay.

1337
01:10:33,020 --> 01:10:36,030
Hivyo hapa ni nini Kelly got: hebu tuangalie ni haraka.

1338
01:10:36,030 --> 01:10:40,290
Hivyo yeye ni pamoja na maktaba cs50 kwa juu.

1339
01:10:40,290 --> 01:10:44,790
Yeye ni pamoja na kiwango IO maktaba saa ya juu,

1340
01:10:45,550 --> 01:10:48,990
IO na kiwango ana kazi kama printf,

1341
01:10:48,990 --> 01:10:51,690
hivyo kama wewe milele unataka kutumia printf, unahitaji kuwa mstari.

1342
01:10:53,060 --> 01:10:56,140
Na kisha yeye pamoja na maktaba kamba,

1343
01:10:56,140 --> 01:10:58,200
ambayo sisi haja,

1344
01:10:58,200 --> 01:11:01,010
kwa sababu maktaba string ina strlen kazi,

1345
01:11:01,010 --> 01:11:04,320
ambayo tutaweza kupata katika kidogo tu.

1346
01:11:04,320 --> 01:11:07,560
Hivyo kama sisi kuangalia nini Kelly amefanya hapa,

1347
01:11:07,560 --> 01:11:10,260
unaweza kutembea kwetu kupitia mliyo kuwa mkiyatenda?

1348
01:11:10,260 --> 01:11:13,600
>> Yeah, hivyo - I mean, I got makosa, hivyo -

1349
01:11:13,600 --> 01:11:15,380
Yeah, hakuna, it's -

1350
01:11:15,380 --> 01:11:18,580
>> Hiyo mimi alitaka kuwaita string kwamba mimi got tu "kamba".

1351
01:11:18,580 --> 01:11:22,230
Nilitaka magazeti nje string

1352
01:11:22,230 --> 01:11:25,640
na kisha mimi -

1353
01:11:27,450 --> 01:11:30,930
Nilitaka kama kuweka kamba kama kama safu ya tabia ya kila

1354
01:11:30,930 --> 01:11:33,170
kuwa tofauti [inaudible], haki?

1355
01:11:33,170 --> 01:11:38,080
Na kisha mimi alitaka kuanza katika nafasi 0

1356
01:11:38,080 --> 01:11:40,630
na kisha kila nafasi ya 2,

1357
01:11:40,630 --> 01:11:42,580
Mimi ningelienda capitalize,

1358
01:11:42,580 --> 01:11:45,680
hivyo mimi tu kama ilivyoelezwa 23, kwa sababu mimi nilikuwa naangalia kwenye meza ASCII.

1359
01:11:45,680 --> 01:11:48,730
Hivyo kwamba ni nini nilikuwa kufikiri - Najua ni si sahihi.

1360
01:11:48,730 --> 01:11:50,920
>> Nimeipata, hivyo hii ni kuanza kubwa.

1361
01:11:50,920 --> 01:11:54,120
Nadhani mengi ya mfumo ni katika mahali hapa.

1362
01:11:54,120 --> 01:11:57,500
Hebu kwenda njia ya aina ya mstari kwa mstari na kuona nini kinaendelea.

1363
01:11:57,500 --> 01:12:01,040
Hivyo njia mimi kama kufanya hivyo ni tu kuanza kwa kuandaa kanuni

1364
01:12:01,040 --> 01:12:04,300
na kuruhusu compiler uniambie kama nini mbaya na code yangu,

1365
01:12:04,300 --> 01:12:07,450
kwa sababu compiler ni mzuri katika ninawaambieni kile ni vibaya kwa code yako.

1366
01:12:09,790 --> 01:12:12,780
Hivyo kama sisi kucheza, kujenga, na haina kujenga.

1367
01:12:12,780 --> 01:12:14,860
Ni anasema kulikuwa na kosa,

1368
01:12:14,860 --> 01:12:17,320
hivyo kama sisi kitabu chini na kuangalia makosa ya kwanza,

1369
01:12:17,320 --> 01:12:20,960
ilisema -

1370
01:12:20,960 --> 01:12:22,040
sisi kitabu nyuma hadi juu,

1371
01:12:22,040 --> 01:12:26,070
tunaweza kuona kuna 5 makosa yanayotokana chini hapa chini.

1372
01:12:26,070 --> 01:12:30,180
Lo, kwamba ni kweli kukatwa.

1373
01:12:31,810 --> 01:12:35,790
Nadhani hiyo ni tu si kwenda kupata bora yoyote.

1374
01:12:36,970 --> 01:12:38,500
>> Hapa sisi kwenda.

1375
01:12:39,790 --> 01:12:42,530
Hivyo kuna 5 jumla ya makosa yanayotokana.

1376
01:12:42,530 --> 01:12:45,140
Hapa naweza kuona tu 2 ya kwanza,

1377
01:12:45,140 --> 01:12:49,100
hivyo siwezi hoja hii juu kidogo na kisha aina ya kile kitabu.

1378
01:12:49,100 --> 01:12:53,220
Hii ni amri ambayo ilikuwa inaendeshwa na kukusanya kificho,

1379
01:12:53,220 --> 01:12:59,030
na kisha kosa ya kwanza ilikuwa katika file.c haki hapa:

1380
01:12:59,030 --> 01:13:03,300
"Inatarajiwa kutambua au '('", na ilikuwa juu ya mstari huu

1381
01:13:03,300 --> 01:13:06,680
ambapo sisi alisema string = GetString ().

1382
01:13:07,660 --> 01:13:12,920
Unaweza kuona haki hapa kwamba ilikuwa kwenye mstari wa 8 file.c,

1383
01:13:12,920 --> 01:13:17,230
na basi naamini hii ni tabia ya 12 - kwamba ni hitilafu.

1384
01:13:17,230 --> 01:13:20,390
Basi nini kinaendelea vibaya juu ya mstari 8 - Kelly?

1385
01:13:20,390 --> 01:13:22,810
>> Wewe tu haja ya simu yake, kama, barua au kitu,

1386
01:13:22,810 --> 01:13:24,400
kama kamba s au kitu?

1387
01:13:24,400 --> 01:13:28,250
Yeah, hivyo ni zinageuka kuwa haya maalum aina majina,

1388
01:13:28,250 --> 01:13:31,770
hivyo kamba, int, char, fupi,

1389
01:13:31,770 --> 01:13:35,740
wao uko wote maneno maalum,

1390
01:13:35,740 --> 01:13:38,940
na unaweza si kweli matumizi yao kama majina ya vigezo yako,

1391
01:13:38,940 --> 01:13:41,430
kwa sababu compiler inaangalia kwamba na anasema,

1392
01:13:41,430 --> 01:13:43,680
"Oh, najua kwamba aina,"

1393
01:13:43,680 --> 01:13:46,530
hivyo unaweza si kweli kuwa kutofautiana string kuitwa kamba,

1394
01:13:46,530 --> 01:13:50,800
kama mimi nina kujaribu kufanya hapa, hii si kazi.

1395
01:13:52,610 --> 01:13:58,250
Lakini badala yake, tunaweza kuiita kitu kama s au st au str.

1396
01:13:58,250 --> 01:14:01,540
Sisi pia hakuweza kuiita int.

1397
01:14:01,540 --> 01:14:03,740
Hatuwezi kuwa string kuitwa int.

1398
01:14:03,740 --> 01:14:06,740
Hatuwezi kuwa string kuitwa Char; hakuna hizo kazi.

1399
01:14:06,740 --> 01:14:09,420
>> Hivyo tutaweza tu kuiita s kwa wakati huu.

1400
01:14:10,630 --> 01:14:13,170
Ajabu.

1401
01:14:13,170 --> 01:14:17,500
Basi nini ijayo kinachoendelea katika mstari huu?

1402
01:14:21,390 --> 01:14:24,350
Kamba - mstari huu inaonekana pretty nzuri?

1403
01:14:24,350 --> 01:14:27,830
Hebu kuwapa mwingine kujaribu; hebu kukimbia.

1404
01:14:27,830 --> 01:14:30,360
Okay, kwa hivyo sisi bado kupata makosa.

1405
01:14:30,360 --> 01:14:32,080
Wakati huu, tuko chini ya makosa 4.

1406
01:14:32,080 --> 01:14:34,350
Hivyo tulipata mmoja wao.

1407
01:14:34,350 --> 01:14:36,130
Hebu hoja juu.

1408
01:14:36,130 --> 01:14:38,890
"Unexpected aina jina 'kamba': inatarajiwa kujieleza," ndiyo?

1409
01:14:38,890 --> 01:14:41,780
>> Yeah, hiyo ni kwa sababu mimi walijaribu kwa jina kamba.

1410
01:14:41,780 --> 01:14:44,270
Yeah, hivyo inaonekana kama sisi sasa pia kwenda fix

1411
01:14:44,270 --> 01:14:46,560
wote wa kufananisha kamba.

1412
01:14:46,560 --> 01:14:50,070
Unaweza kuona kuna kumbukumbu ya string hapa, moja hapa, moja hapa,

1413
01:14:50,070 --> 01:14:53,440
hivyo tunaweza kusonga zote hizi na s.

1414
01:14:56,040 --> 01:15:00,930
Mkuu. Okay, kukimbia tena.

1415
01:15:00,930 --> 01:15:03,260
Jengo - kosa jingine limetokea.

1416
01:15:03,260 --> 01:15:06,900
>> Okay, sasa tuko chini ya kosa moja,

1417
01:15:06,900 --> 01:15:11,090
hivyo int i = s na kisha mabano mraba.

1418
01:15:11,090 --> 01:15:14,880
Hivyo unaweza kutuambia kidogo kuhusu nini walikuwa kufanya hapa, Kelly?

1419
01:15:14,880 --> 01:15:17,120
>> Ndiyo.

1420
01:15:17,120 --> 01:15:19,410
Ilikuwa kwenye mstari 10.

1421
01:15:19,410 --> 01:15:22,760
>> Mimi sijui kama sisi zinahitajika yote,

1422
01:15:22,760 --> 01:15:25,560
lakini nadhani alikuwa anajaribu -

1423
01:15:25,560 --> 01:15:27,580
Mimi itabidi kuokoa ni hivyo unaweza kufuata pamoja.

1424
01:15:27,580 --> 01:15:30,470
>> Nadhani alikuwa

1425
01:15:30,470 --> 01:15:33,150
anajaribu kuwaambia ni kuanza katika nafasi 0

1426
01:15:33,150 --> 01:15:35,030
mwanzoni mwa yangu kwa kitanzi,

1427
01:15:35,030 --> 01:15:38,370
hivyo nadhani labda kwamba alikuwa akisema lazima.

1428
01:15:39,690 --> 01:15:41,350
Hivyo tu kwa kurejea,

1429
01:15:41,350 --> 01:15:44,850
wewe walikuwa wakisema kwamba hii - ungekuwa kujaribu kuanza hii katika nafasi 0

1430
01:15:44,850 --> 01:15:47,030
na kupata hii - yeah,

1431
01:15:47,030 --> 01:15:50,460
hivyo nadhani mapema, pia, wakati walikuwa wakitembea kupitia kanuni,

1432
01:15:50,460 --> 01:15:54,070
wewe walikuwa wanazungumza juu ya jinsi gani alitaka kutibu string kama safu

1433
01:15:54,070 --> 01:15:57,440
ili tuweze kupata kila tabia mmoja mmoja.

1434
01:15:57,440 --> 01:16:00,660
Nadhani Dan arrays zilizotajwa, pia, kujaribu kubadilisha masharti ndani ya arrays.

1435
01:16:01,400 --> 01:16:03,300
>> Ni zinageuka kuwa aina ya chini ya Hood,

1436
01:16:03,300 --> 01:16:06,060
kamba ni kweli kuhifadhiwa kama safu tayari,

1437
01:16:06,060 --> 01:16:08,060
na unaweza kuifikia kama safu;

1438
01:16:08,060 --> 01:16:12,390
hakuna uongofu kwamba una kufanya.

1439
01:16:12,390 --> 01:16:15,770
isn't string - hivyo -

1440
01:16:15,770 --> 01:16:18,200
kamba si kweli safu,

1441
01:16:18,200 --> 01:16:21,940
lakini unaweza kupata hiyo kama vile, kwa sababu wote wa wahusika ni kuhifadhiwa

1442
01:16:21,940 --> 01:16:25,160
haki ya mmoja karibu na kila mmoja katika kumbukumbu,

1443
01:16:25,160 --> 01:16:28,310
hivyo kama unataka kupata tabia ya kwanza ya kamba,

1444
01:16:28,310 --> 01:16:31,910
ni sawa kama kupata integer kwanza katika safu integer.

1445
01:16:31,910 --> 01:16:35,010
Hivyo sisi mara nyingi - we'll

1446
01:16:35,010 --> 01:16:36,360
rejea 2 kama

1447
01:16:36,360 --> 01:16:38,590
oh, kama kuwa kamba, kama kuwa safu,

1448
01:16:38,590 --> 01:16:40,830
hata kama ni kweli - they're mambo tofauti sana,

1449
01:16:40,830 --> 01:16:43,410
lakini unaweza kutibu yao mengi sana sawa.

1450
01:16:44,700 --> 01:16:47,400
Hivyo ni zinageuka kuwa mstari huu kweli -

1451
01:16:47,400 --> 01:16:51,270
hatuna haja ya kufanya lolote uongofu,

1452
01:16:51,270 --> 01:16:53,500
na kwa kweli,

1453
01:16:53,500 --> 01:16:56,790
hii kwa kweli si halali kujieleza,

1454
01:16:56,790 --> 01:16:59,040
ambayo ni nini compiler wetu anatuambia.

1455
01:16:59,040 --> 01:17:01,290
Ni kusema, "Hey, inatarajiwa kujieleza,

1456
01:17:01,290 --> 01:17:04,610
na kile Mimi nimepata hapa ni kitu ambacho si kujieleza. "

1457
01:17:04,610 --> 01:17:07,310
Kutangaza safu,

1458
01:17:07,310 --> 01:17:11,780
wote unahitaji kufanya ni kitu kama hii kwa semicolon,

1459
01:17:11,780 --> 01:17:15,080
na kisha kumweleza safu muda gani unataka kwa kuwa,

1460
01:17:15,080 --> 01:17:18,370
kama vile 5, hivyo hii line 10

1461
01:17:18,370 --> 01:17:23,880
atatangaza safu kuitwa i na integers 5 ndani yake.

1462
01:17:23,880 --> 01:17:26,540
>> Hii ni kando, hii si lazima kwa kificho,

1463
01:17:26,540 --> 01:17:30,970
lakini hii ni - hii ni aina ya nini tamko inaonekana kama.

1464
01:17:30,970 --> 01:17:35,310
>> Jinsi gani unaweza si kutumia Char i [strlen (s)]?

1465
01:17:35,310 --> 01:17:38,500
Char i [strlen (s)]?

1466
01:17:38,500 --> 01:17:41,500
>> Char i, na kisha ndani ya mabano, strlen (s).

1467
01:17:43,900 --> 01:17:47,710
Yeah, hivyo tunaweza -

1468
01:17:47,710 --> 01:17:49,460
tunaweza kufanya hii,

1469
01:17:49,460 --> 01:17:52,160
na hii ingekuwa kutangaza - gani hii nini?

1470
01:17:52,160 --> 01:17:55,900
>> Nadhani ingekuwa kutangaza safu

1471
01:17:55,900 --> 01:18:01,780
ya, kama - ya -

1472
01:18:01,780 --> 01:18:04,540
oh, huna haja ya i - oh,

1473
01:18:04,540 --> 01:18:06,420
yeah, wewe dhahiri hawana haja i.

1474
01:18:06,420 --> 01:18:10,250
Wewe kutangaza safu ya wahusika

1475
01:18:10,250 --> 01:18:13,150
s ya urefu.

1476
01:18:14,680 --> 01:18:16,770
Na hivyo kile Sam kusema ni kwamba

1477
01:18:16,770 --> 01:18:20,660
mstari 10 - basi mimi kuweka baadhi ya nafasi katika kati yake na wengine ili tuweze kutenganisha -

1478
01:18:20,660 --> 01:18:23,440
mstari 10 ingekuwa kutangaza safu

1479
01:18:23,440 --> 01:18:28,520
ya chars, strlen (s) yenye thamani ya yao,

1480
01:18:28,520 --> 01:18:32,270
lakini sisi kwa kweli wanahitaji i,

1481
01:18:32,270 --> 01:18:35,710
na sababu tunahitaji i ni kwa sababu sisi haja ya kutoa safu jina;

1482
01:18:35,710 --> 01:18:38,900
vinginevyo, tunataka kuwa njia ya kutaja safu baadaye katika code.

1483
01:18:38,900 --> 01:18:41,180
>> Hivyo hii ni haki hapa jina safu

1484
01:18:41,180 --> 01:18:43,420
na ndani ni urefu.

1485
01:18:43,420 --> 01:18:45,010
Hii itatupa safu,

1486
01:18:45,010 --> 01:18:47,430
lakini hii ni - tena, hii ni tamko.

1487
01:18:47,430 --> 01:18:50,380
Siyo zoezi; si initialization.

1488
01:18:50,380 --> 01:18:52,330
Kama sisi kutangaza hii safu kama hii,

1489
01:18:52,330 --> 01:18:54,490
kuna kweli hakuna kitu katika maudhui ya safu.

1490
01:18:54,490 --> 01:18:57,490
Ni tu Junk - chochote ni katika huko.

1491
01:18:57,490 --> 01:18:59,780
Na kama sisi alisema,

1492
01:18:59,780 --> 01:19:01,340
sisi kweli huna hata haja ya kufanya hili uongofu,

1493
01:19:01,340 --> 01:19:04,810
kwa sababu tunaweza tayari kutibu string s kama safu.

1494
01:19:06,750 --> 01:19:09,170
Mimi najua sisi ni mbio ndefu kidogo kwa wakati,

1495
01:19:09,170 --> 01:19:12,330
lakini nataka tu kweli haraka kupata hii kwa kitanzi

1496
01:19:12,330 --> 01:19:14,850
na kuonyesha jinsi ya kupata wahusika mmoja mmoja katika safu,

1497
01:19:14,850 --> 01:19:17,170
kwa sababu hiyo ni muhimu kwa ajili ya zoezi wetu.

1498
01:19:17,170 --> 01:19:20,790
Na kisha tutaweza basi wewe kwenda huko.

1499
01:19:20,790 --> 01:19:24,610
>> Hiyo hapa, sisi tumepewa kwa kitanzi

1500
01:19:24,610 --> 01:19:28,310
kwamba inaonekana karibu nzuri.

1501
01:19:28,310 --> 01:19:30,960
Nini si kabisa karibu huko?

1502
01:19:30,960 --> 01:19:33,240
What's - nini si haki kabisa kuhusu hili kwa kitanzi?

1503
01:19:33,240 --> 01:19:36,010
>> Hakuna braces curly?

1504
01:19:36,010 --> 01:19:38,420
Hakuna braces curly, kwa moja.

1505
01:19:38,420 --> 01:19:42,580
Wanataka kuhakikisha kwamba tuna mwili wa kitanzi na braces curly.

1506
01:19:42,580 --> 01:19:45,240
Lo, si brace mraba!

1507
01:19:45,240 --> 01:19:48,660
Na nini ni jambo la pili kwamba tunahitaji kufanya na kitanzi hii?

1508
01:19:48,660 --> 01:19:52,640
Kama mimi kujaribu na kukimbia,

1509
01:19:52,640 --> 01:19:56,740
whats kosa hili kwamba mimi kupata?

1510
01:19:56,740 --> 01:20:00,990
Mimi kupata hizi makosa yote - nina initialize i.

1511
01:20:00,990 --> 01:20:03,610
Mkuu.

1512
01:20:03,610 --> 01:20:05,770
Hivyo hii itakuwa kitanzi - hii si kabisa huko,

1513
01:20:05,770 --> 01:20:08,680
lakini ni kupata kweli karibu.

1514
01:20:08,680 --> 01:20:11,260
Kanuni hii tunaweza sasa kukimbia,

1515
01:20:11,260 --> 01:20:14,620
kujenga, kosa bado hutokea.

1516
01:20:17,960 --> 01:20:19,800
Kwa nini ni bado kulalamika,

1517
01:20:19,800 --> 01:20:22,030
akisema kujieleza ni outnyttjade,

1518
01:20:22,030 --> 01:20:24,600
na kwamba kwa sababu line hii haina kufanya kitu chochote.

1519
01:20:24,600 --> 01:20:27,620
Hatukuwa kuhifadhi mahali popote; hatukuwa kuokoa matokeo.

1520
01:20:27,620 --> 01:20:30,210
Ambapo tunapaswa kuwa kuokoa matokeo haya?

1521
01:20:30,210 --> 01:20:32,920
>> S au i?

1522
01:20:32,920 --> 01:20:35,990
Hasa, na hii syntax funky,

1523
01:20:35,990 --> 01:20:38,550
hii ni pamoja na mabano mraba

1524
01:20:38,550 --> 01:20:41,500
ina maana kupata tabia i-th wa s.

1525
01:20:41,500 --> 01:20:45,650
Hiyo kwenda kuwa kitu ambacho kweli ni muhimu kwa zoezi.

1526
01:20:45,650 --> 01:20:48,070
Kwa bahati mbaya, sisi ni kwenda haja ya kusimama hapa,

1527
01:20:48,070 --> 01:20:50,550
hivyo kwamba Sebastian sehemu wanaweza kuja katika,

1528
01:20:50,550 --> 01:20:53,980
lakini mimi nina furaha kukaa baada ya nje na kuchukua maswali yoyote.

1529
01:20:53,980 --> 01:20:56,680
Kwa hiyo asante guys kwa kuja.

1530
01:20:56,680 --> 01:20:59,730
Hii lazima sasa kupakia, kujenga, kuendesha.

1531
01:21:01,570 --> 01:21:04,320
Tunaweza kuingia string kama "hello"

1532
01:21:06,570 --> 01:21:08,730
na Prints "QOX".

1533
01:21:08,730 --> 01:21:11,030
[Kicheko]

1534
01:21:11,030 --> 01:21:14,640
>> Hivyo si kabisa huko, lakini kusonga, kupata kuelekea matanzi hizo!

1535
01:21:14,640 --> 01:21:18,640
Shukrani kwa kuja, na nitakuwa nje.