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ZAMYLA CHAN: Ni-me, Zamyla.

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Leo, tunakwenda kutekeleza
Mario, ambapo sisi kuteka Mario

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piramidi kamili kwa ajili yake na kuruka juu.

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Hebu kuvunja chini
kazi ndogo kwa tatizo hili.

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>> Kwanza, tunataka kuchochea mtumiaji
kwa urefu wa piramidi.

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Na kisha tunataka kuhakikisha
kwamba kwamba pembejeo ni halali.

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Na kisha tunakwenda
wanataka kuteka piramidi.

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>> Hivyo hebu majadiliano juu na kusababisha
na kuthibitisha user pembejeo.

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Ni ili kuangalia kitu kama
hii, kitanzi do-wakati kwamba

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humshauri mtumiaji kwa
integer na kisha tu kurudia

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kama kwamba integer ni batili.

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Hivyo kile lazima hali hii kuwa?

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>> Kwa hili, hebu kwenda nyuma
na vipimo.

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Naam, spec anatueleza kwamba yoyote halali
urefu ni kwenda kuwa kati ya 0 na 23,

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umoja.

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Hivyo basi hiyo ina maana kwamba yoyote batili
urefu ni kwenda kuwa chini ya 0

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au zaidi ya 23.

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>> Hivyo sasa kwamba tuna habari hii,
hebu kubuni hali yetu.

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Lakini tunahitaji kuwa makini,
kwa sababu sasa tuna

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Booleans mbili kwamba tunataka kutathmini.

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>> Hapa nimekuwa zinazotolewa wewe
na meza ukweli.

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Hii inaruhusu sisi kuchukua mbili
Booleans, Boolean moja na mbili.

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Na tunaweza kutathmini ama bool1
na bool2 au bool1 au bool2.

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>> Basi nini tofauti
kati na na au?

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Naam, bool1 na bool2 mapenzi
kutathmini kwa kweli ikiwa na tu

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kama Booleans yote ni ya kweli,
ilhali au operesheni

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itakuwa kweli kama aidha moja ya
Booleans au yote ni ya kweli.

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Hivyo, pamoja na hili akilini,
kuona kama unaweza kufikiri

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nini hali mwafaka kwa
do-wakati kitanzi yako kwa n batili

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ni kwenda kuwa.

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>> Pamoja na kwamba, tumekuwa ilisababisha na kuthibitishwa
user kwa urefu wa piramidi

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kwamba wanataka.

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Hivyo sasa, ni juu yetu
kuteka piramidi.

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piramidi kamili kwa hili
tatizo itakuwa kuangalia kidogo

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kama hii, ambapo tuna piramidi kushoto,
baadhi pengo, na kisha piramidi haki.

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Basi hebu kuvunja hii chini kidogo.

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>> Kama mimi kwenda kwa mhariri wa maandishi yangu, hapa mimi wameweza
inayotolewa us kushoto na kompyuta piramidi.

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Lakini hiyo si kufanya.

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Nini tunataka kufanya ni tunataka
kujenga kulia na kompyuta piramidi kwanza.

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Hivyo kufanya hili, kushinikiza tu
hashes yangu pamoja na upande,

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Mimi tu kwenda kuweka baadhi ya wahusika
katika kati, dots hizi tu.

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Kisha mimi nina kwenda kuweka mbili juu ya
line ya pili, na moja juu ya mstari huo.

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Na hivyo hapa nina
kulia na kompyuta piramidi.

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>> Baada ya hapo, mimi nina kwenda kwa
kwenda nyuma ya mstari wa juu

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na kuweka katika pengo, ambayo
ni, kwa spec, nafasi mbili.

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Basi mimi nina kwenda kujaza
upande wa pili wa piramidi.

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Mimi nina kwenda kwa safu ya pili, kuandika
nafasi mbili kwa pengo na kisha mbili

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hashes.

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Nyuma ya safu ya tatu nafasi mbili
kwa pengo na hashes tatu.

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Na mwisho, nafasi mbili
kwa pengo na hashes nne.

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Hivyo kwamba ni nini full
piramidi itakuwa kuangalia kama.

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>> Bila shaka, hatutaki
dots hizi katika njia.

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Hivyo sisi ni kwenda kuchukua nafasi ya hizi
dots kwa kuweka baadhi ya maeneo katika.

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Moja, mbili, tatu katika mstari wa kwanza.

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Moja, mbili juu ya pili.

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Na moja juu ya mstari wa tatu.

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Hivyo hii ni nini tunataka kufanya kama sisi
alitaka kufanya tu piramidi kamili,

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kusema, katika mhariri wa maandishi yetu.

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>> Basi hebu kuchukua hii,
kuelewa mwelekeo,

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na kubadilisha kwa mabavu na baadhi pseudocode.

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Kwa kila mstari wa piramidi, tunataka
magazeti piramidi kushoto na kisha

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pengo na kisha piramidi haki.

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Kwa piramidi kushoto, sisi magazeti
zinazohitajika kiasi cha nafasi,

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ikifuatiwa na hashes.

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Kisha sisi magazeti pengo, ambayo
ni mbili tu nafasi kila wakati.

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Na katika piramidi haki, sisi magazeti
zinazohitajika idadi ya hashes.

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>> Kwa safu ya pili, tulifanya
huo halisi ya mchakato.

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Sisi magazeti mazingira kwa ajili ya kushoto
piramidi, zinazohitajika kiasi

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ya hashes, pengo, nafasi mbili, na
kisha hashes kwa piramidi haki.

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>> Hebu kukabiliana na mfano
kwa piramidi kushoto.

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Kama mimi alikuwa, kwa madhumuni
ya mfano huu, urefu

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ya nane ombi kwa
user, basi mstari yangu ya kwanza

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ingekuwa hash moja na nafasi saba.

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mstari yangu ya pili ingekuwa
mbili hashes, nafasi sita.

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Tatu mfululizo, hashes tatu, nafasi tano.

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Pengine unaweza kufanya hivyo
mwenyewe kwa urefu wa nane

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na kuamua kwa kila mstari ni wangapi
hashes na jinsi nafasi nyingi unahitaji.

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Lakini nini tunataka kufanya ni
tunataka abstract yake.

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Hivyo naomba kwa mstari yoyote nth, jinsi wengi
hashes na jinsi nafasi nyingi tunahitaji?

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>> Sasa, kama wewe kuamua
mfano kwa hashes wangapi

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na jinsi nafasi nyingi unahitaji kwa ajili ya
yoyote mstari nth kwa urefu fulani,

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kumbuka kuwa makini
ya jinsi wewe ni Indexing.

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Nini maana na hii ni kwamba katika kila siku
maisha wengi wetu kuanza kuhesabu kwa moja.

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Hivyo safu ya kwanza itakuwa namba moja.

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Na safu ya pili itakuwa mstari
namba mbili, kadhalika na kadhalika.

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>> Lakini katika sayansi ya kompyuta na
CS50, sisi ni zero-indexed.

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Hivyo sisi kweli kuanza kuhesabu saa sifuri.

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Hivyo safu ya kwanza ingekuwa
kuwa mstari simu zero.

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Na safu ya pili
itakuwa mstari namba moja.

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Hivyo kama mimi alikuwa urefu wa nane kwa
piramidi yangu, basi thamani ya mwisho ya n

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ingekuwa kweli kuwa saba na si minane.

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>> Hivyo kuwa makini kuhusu hili.

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Na kuwa na ufahamu wakati wewe ni kuamua
muundo yako iwe yako zero-indexed

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au moja ya indexed

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>> SAWA.

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Hivyo sasa kwamba tuna
mfano kwa piramidi kushoto,

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tunahitaji kuamua
mfano kwa pengo.

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Kwa bahati nzuri, hii ni kweli ni rahisi.

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Ni tu daima nafasi mbili.

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>> Hivyo sasa sisi kuendelea na mfano wa kulia.

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safu ya kwanza itakuwa na hash moja.

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safu ya pili miwili.

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Tatu mstari, tatu.

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Kadhalika na kadhalika.

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Hivyo tena, kuamua kwa yoyote abstract
n na urefu yoyote jinsi hashes wengi

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na nafasi ngapi
kila mstari wanapaswa kuwa.

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>> SAWA.

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Hivyo tunajua kwamba kwa kila sisi mstari
haja ya kuendesha baadhi mchakato.

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Jinsi gani sisi kufanya hivyo?

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Naam, sisi kutumia kwa kitanzi kujenga,
zikiwemo za initialization,

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hali, na update.

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Kwa loops inaweza kutumika
kurudia taratibu.

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>> Hivyo kusema mimi nataka kusema hello,
Mara dunia 50, kisha yangu kwa kitanzi

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bila kuangalia kitu kama hii, ambapo
Mimi initialize variable yangu na sifuri.

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hali ni kwamba i ni chini ya 50.

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Na kisha update ni kwamba
nyongeza kwa moja kila wakati.

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Kwa hiyo kile hii itakuwa kufanya itakuwa
magazeti hello, mara dunia 50 mfululizo.

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>> Sasa, kusema nilitaka iterate
zaidi ya urefu wa piramidi.

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Kisha badala ya coding ngumu
baadhi ya thamani katika hali,

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Mimi tu kutumia urefu kutofautiana.

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Kwa hiyo kile hii kufanya ni iterate
zaidi ya urefu kila mstari.

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Na siwezi kufanya kitu ndani ya
mwili wa kitanzi kwamba.

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>> Je, tunataka kufanya
ndani ya mwili wa kitanzi?

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Naam, kama tulivyoonyesha kabla, tunataka
magazeti nafasi na hashes

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kwa piramidi kushoto na kisha magazeti
nafasi mbili na kisha magazeti hashes.

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Hivyo tumekuwa tayari figured kwamba nje.

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Ili tuweze kuanza kujaza
katika mpango wetu mengi zaidi.

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>> Hapa nina nje kwa kitanzi kwamba
iterates juu ya kila mstari katika piramidi.

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Na ndani ya mwili kwamba mimi nina kwenda
magazeti nafasi tena na tena,

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hashes tena na tena, na kisha pengo,
na kisha hashes kwa piramidi haki,

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na kisha, mwisho, mpya
line ya kuanza mfululizo ijayo.

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>> Pamoja na kwamba, tumekuwa ilisababisha
user kwa ajili ya pembejeo.

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Tumekuwa alifanya uhakika kwamba ni halali.

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Na kisha tumekuwa inayotolewa piramidi.

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Hivyo Mario unaweza mafanikio
kupanda piramidi.

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>> Jina langu ni Zamyla.

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Na hii ni CS50.

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