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>> Rob BOWDEN: Hi, mimi nina Rob, na hebu kuruka
ndani ya hacker toleo la Mario.

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Kitu hivyo kwanza tunahitaji kufanya ni
kupata urefu kutoka kwa mtumiaji.

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Hapa sisi ni kuwauliza kwa
integer mashirika yasiyo ya hasi chini ya 24 na

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sisi ni kutumia kazi CS50 GetInt
kwa kunyakua kwamba integer kutoka kwa mtumiaji.

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Tunaona tuko ndani ya do-kitanzi wakati
kwamba itaendelea wanaoendesha kwa muda mrefu kama

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urefu ni kubwa kuliko
23 au chini ya 0.

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Na hivyo tutaweza kuendelea mpaka user
kweli inatupa nini tunataka.

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>> Mara baada ya sisi na kwamba urefu, tunapata
kuu kwa kitanzi cha programu yetu.

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Basi hebu kwanza kuangalia mfano
kutoka pset spec.

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Tunaona katika mfano huu kwamba wakati sisi
kuingia urefu wa 4, mstari chini

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kwanza Prints hashes nne, nafasi mbili,
na hashes nne zaidi.

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>> Kisha safu moja juu ya kwamba Prints moja
nafasi tatu hashes, nafasi mbili kwa

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tofauti piramidi, na
kisha hashes tatu zaidi.

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Na juu ya kwamba, nafasi mbili, hashes mbili,
nafasi mbili, hashes mbili.

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Na hatimaye, nafasi ya tatu moja
hash, nafasi mbili hash moja.

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Hivyo unapaswa kuanza kwa taarifa
mfano hapa.

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>> Hebu tuangalie kanuni kwa ajili ya jinsi
tunakwenda kufanya hivyo.

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Tunaona hapa kwamba sisi ni iterating
juu ya safu yote ya piramidi.

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Kwanza tunataka mahesabu ya
idadi ya nafasi.

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Na kukumbuka kwamba sisi kuanza katika
juu ya piramidi na kazi yetu

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njia ya chini tangu hatuwezi magazeti
chini kisha safu moja up na

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kisha safu moja up.

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Hivyo juu ya piramidi, taarifa
kwamba idadi ya nafasi ni sawa na

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urefu minus 1.

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Tunakwenda magazeti nafasi tatu kisha
hash moja na kisha nafasi mbili kwa

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tofauti na hash mwingine.

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>> Hivyo nafasi ni sawa na
urefu minus mfululizo.

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Kama mstari ni 1 na urefu yetu ni 4,
kwamba utakuwa kutupa nafasi 3, kama tunataka.

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Kisha hii kwa kitanzi tu prints
kwamba idadi ya nafasi.

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Kama nafasi ni tatu, kisha tunakwenda
kuunda nafasi moja mara tatu.

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>> Kuendelea, sasa tunataka magazeti
hashes ya piramidi kushoto, ambao ni

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tu sawa na mstari idadi.

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Kuangalia nyuma hapa, katika mstari
moja, sisi magazeti hash moja.

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Katika mstari wa mbili sisi magazeti mbili, katika
mstari tatu sisi magazeti tatu.

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Hivyo sisi tu kitanzi mara mstari
uchapishaji hash mfano.

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Kisha kwa ajili ya safu yote ya piramidi, sisi
magazeti nafasi hasa mbili tofauti

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wale piramidi.

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>> Na hatimaye, tunataka magazeti haki
upande wa piramidi, ambayo ni

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tena idadi sawa ya hashes
kama upande wa kushoto.

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Na hivyo ni exact
kwa kitanzi kama juu hapa.

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Hatimaye, tunahitaji kujenga line mpya katika
ili kusonga mbele kwa karibu mstari wa

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piramidi na kuendelea uchapishaji.

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Na hiyo ni yake.

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Jina langu ni Rob na hii ilikuwa Mario.

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