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>> [MIZIK jwe]

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>> ROB BOWDEN: Se mwen, Rob.

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Se pou nou mache nan ki jan
aplike Mario.

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Se konsa, premye bagay nou bezwen fè se
de motive-itilizatè a pou D 'a.

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>> Nou bezwen mande yo egzakteman ki jan
wotè piramid la ta dwe.

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Se konsa, isit la, nou wè n ap fè
wotè = GetInt.

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Yon Apre sa, sonje ke fonksyon an GetInt
se aplike nan CS50 nan

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bibliyotèk, se konsa moute tèt, nou bezwen
sonje # enkli cs50.h.

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>> Se konsa, poukisa nou gen sa a vlope
nan yon bouk fè-pandan y ap?

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Oke, nou menm tou nou bezwen sonje ke
D 'itilizatè a gen yo dwe ki valid.

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Ki sa ki yon opinyon valab?

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Oke espèk nan pset espesyalman di
ki yon wotè pi piti pase 0 oswa pi plis

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pase 23 se valab.

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>> Se konsa, moute isit la, nou wè ke nou ap defini
yon konstan rele MAX_HEIGHT ak nan

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valè de 23.

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Sa a bouk fè-pandan y ap ap kontinye pandan y ap
wotè pi piti pase 0 oswa MAX_HEIGHT se

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mwens pase wotè, ki vle di ke
23 se mwens pase wotè an.

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Se konsa, si wotè se 24 oswa pi plis, nou
pral kontinye loupin.

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Sonje ke fè-pandan y ap pasan yo trè
itil chak fwa nou vle jwenn

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D 'itilizatè yo ak Lè sa a, valide li, depi
nou inevitableman bezwen mande itilizatè a nan

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omwen yon fwa pou valè a yo vle.

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>> Se konsa, yon fwa nou gen opinyon-yo, nou
kapab kounye a bati piramid la.

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Youn nan ke trik nouvèl yo nan pwoblèm sa a mete an se
ke nou gen yo kòmanse nan tèt yo nan

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piramid la.

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Ou pa ka printf anba a nan la
piramid ak Lè sa a, bati wout ou yo.

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Se konsa, kite yo gade nan egzanp lan
soti nan espèk a pset.

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>> Nou wè isit la ke lè nou antre nan yon wotè
nan 8, anba la anpil nan la

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piramid simagri nèf achaj.

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Yon nivo moute soti nan ke simagri
yon sèl espas ak uit achaj.

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Yon nivo moute soti nan se sa ki de espas ak
sèt achaj yo, tout wout la jouk nou

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jwenn nan tèt la nan piramid la, ki se
uit nivo moute, ki simagri sèt

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espas ak de achaj.

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Se konsa, sonje ke nou gen
fè nivo tèt sa a an premye.

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>> Isit la nou ap iteration soti nan la
tèt nivo, ranje 8, k ap kontinye

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jouk ranje rive nan 0.

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Espas Se konsa, ki jan anpil t 'nou bezwen
ekri ak lèt ​​detache nan ki tèt ranje?

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Nou enprime sèt espas
ak de achaj.

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Se konsa, nimewo a nan espas nou vle se
ranje a ki te sou mwens 1.

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>> Si tèt ranje a se 8, 8 mwens
1 ba nou sèt espas.

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Lè sa a, nou gen yon bouk ki pral ekri an lèt detache
soti chak yon sèl espas nan yon tan.

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Se konsa, lè espas se 7, sa a bouk
sèt fwa, enprime

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sèt espas endividyèl elèv yo.

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>> Se konsa, kounye a nou bezwen ekri ak lèt ​​detache achaj sa yo
nan fen a nan piramid la.

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Se konsa, isit la, nou bezwen kalkile
ki kantite achaj.

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Nou wè ke nou ap fè wotè
ranje mwens plis 2.

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Se konsa, kouman t 'nou jwenn sa?

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>> Sonje ke tèt la nan piramid lan
se ranje 8, epi wotè a se 8.

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Apre sa, nou toujou enprime de achaj.

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Se konsa, omwen nan anpil, 8 mwens 8 plis
2 ban nou repons kòrèk la.

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Lè sa a, konsidere anba a
nan piramid la, ranje 1.

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Ranje Tay mwens pral ban nou 7yèm, ak
Lè sa a, plis 2 ban nou nèf achaj,

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ki se egzakteman nimewo a
nan achaj ke nou enprime.

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Se konsa, sa a se fòmil la nou vle
sèvi ak kalkile kantite

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achaj nan chak ranje.

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>> Lè l sèvi avèk ladan nimewo, nou Lè sa a, gen yon lòt
pou bouk, sanble anpil ak nan

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pou bouk ke nou itilize pou espas yo,
ki iterates kantite achaj fwa

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enprime yon hash sèl chak fwa.

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Sou tèt ranje a, ki pral
ekri ak lèt ​​detache de achaj.

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Sou ranje anba a, ki pral
ekri ak lèt ​​detache nèf achaj.

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Apre sa, youn ak lòt ranje pral enprime chak
kantite achaj nan ant.

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>> Lè sa a, nan fen a anpil, nou bezwen
ekri ak lèt ​​detache nouvo liy nou an pou yo ale nan pwochen an

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ranje nan piramid la.

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Finalman, nou bezwen ekri ak lèt ​​detache liy nan nouvo
nan fen ranje a yo nan lòd yo

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kontinye pwochen an
ranje nan piramid la.

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Apre sa, nan fen pwogram nou an,
nou gen retounen nan 0.

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>> Tankou pou chak espèk nan pset, retounen nan
0 se pa entèdi sa nesesè.

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Men, li siyifi ke prensipal se fè.

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Non mwen se Rob, ak sa a te Mario.

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>> [MIZIK jwe]

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