1
00:00:00,000 --> 00:00:02,742

2
00:00:02,742 --> 00:00:05,680
>> Oratè 1: Hi tout moun.

3
00:00:05,680 --> 00:00:07,530
Nou pral jwenn te kòmanse.

4
00:00:07,530 --> 00:00:09,330
Mwen panse ke moun yo toujou ale
yo dwe filtraj nan.

5
00:00:09,330 --> 00:00:12,840
Men, nan enterè a nan tan, se konsa nou kapab
jwenn ou nèg soti nan isit la sou tan,

6
00:00:12,840 --> 00:00:14,110
nou ap ale nan kòmanse.

7
00:00:14,110 --> 00:00:18,780
Se konsa, akeyi nan CS50 egzamen 0 revizyon an.

8
00:00:18,780 --> 00:00:23,020
Pou moun nan nou ki pa te reyalize
ankò, ou gen yon kesyon nan Mèkredi.

9
00:00:23,020 --> 00:00:25,700
Woo-ou.

10
00:00:25,700 --> 00:00:29,780
>> Si ou pa gen te kòmanse etidye ankò oswa
pa gen reyalize ke sa a egziste ankò,

11
00:00:29,780 --> 00:00:34,070
ti tès sot pase yo ak tout enfòmasyon sou
egzamen ou an se sou cs50.net/quizzes.

12
00:00:34,070 --> 00:00:38,090
Genyen kèk bagay trè bon sou la,
ti tès sot pase soti nan 10 dènye a

13
00:00:38,090 --> 00:00:43,760
ane kòm byen ke enfòmasyon
sou egzamen sa a ak sijè

14
00:00:43,760 --> 00:00:46,250
ke yo pral kouvri.

15
00:00:46,250 --> 00:00:48,980
Se konsa, kite a jwenn te kòmanse.

16
00:00:48,980 --> 00:00:54,240
>> Se konsa, ou nèg ta ka sonje, premye a
jou nan klas David te gen moun lanp sou.

17
00:00:54,240 --> 00:00:59,650
Se konsa, esansyèlman, tout bagay ki ale
sou anba kapo machin lan nan yon òdinatè se

18
00:00:59,650 --> 00:01:00,860
fè nan binè.

19
00:01:00,860 --> 00:01:04,080
Binè vle di ki sa li son
tankou, 0 a ak 1 a.

20
00:01:04,080 --> 00:01:09,290
Li te gen de valè ki
kapab reprezante.

21
00:01:09,290 --> 00:01:14,675
>> Se konsa, jis tankou nan premye jou a nan seksyon
Lè David vire sou yon limyè

22
00:01:14,675 --> 00:01:21,990
anpoul yo reprezante sou, oswa 1, konpitè nou an
konprann binè kòm 0 a ak

23
00:01:21,990 --> 00:01:24,110
1 a, limen oubyen etenn.

24
00:01:24,110 --> 00:01:25,360
Prensip Fondamantal nan nan binè.

25
00:01:25,360 --> 00:01:29,440

26
00:01:29,440 --> 00:01:32,470
Chak plas reprezante
nan baz de.

27
00:01:32,470 --> 00:01:36,260
Se konsa, ou ajoute 2 a 0 a nan
1 a la 2 tout wout la leve.

28
00:01:36,260 --> 00:01:41,970
>> Pou kalkile ki sa binè ou a se fè
desimal, ou jis swiv ekwasyon sa a

29
00:01:41,970 --> 00:01:42,840
kalite bagay.

30
00:01:42,840 --> 00:01:49,510
Si ou gen yon 1 nan nenpòt nan kote sa yo,
ou miltipliye li pa tou sa

31
00:01:49,510 --> 00:01:53,820
baz li nan nan, ajoute l 'kanpe, epi
ou jwenn desimal a.

32
00:01:53,820 --> 00:01:57,930
Se konsa, sa a se ki jan ou konte
a 5 nan binè.

33
00:01:57,930 --> 00:02:01,400
Jis tankou sa nou te fè sou la
dènye glise, sa a se ki jan ou ta

34
00:02:01,400 --> 00:02:02,650
reprezante 1 jiska 5.

35
00:02:02,650 --> 00:02:05,320

36
00:02:05,320 --> 00:02:09,660
>> Menm jan an tou, jis tankou ou ka ajoute ak
fè soustraksyon nan desimal oswa baz 10, oswa

37
00:02:09,660 --> 00:02:13,040
reyèlman nenpòt ki baz, sou kapab ajoute
ak soustraksyon nan binè.

38
00:02:13,040 --> 00:02:18,400
Ekzakteman ki sa ou ta atann lè ou
ajoute de moute a, si li egal pi gwo

39
00:02:18,400 --> 00:02:24,220
pase 1, ou pote yon 1, fè l 'yon 0,
epi fè adisyon a nan fason sa a, jis

40
00:02:24,220 --> 00:02:29,910
tankou ou ta atann ak regilye
desimal oswa nenpòt lòt baz.

41
00:02:29,910 --> 00:02:30,970
Fre.

42
00:02:30,970 --> 00:02:35,140
>> Se konsa, tankou mwen te di anvan, tout bagay ki
ale sou anba kapo machin lan nan òdinatè nou an

43
00:02:35,140 --> 00:02:37,560
se fè nan 0 a ak 1 a, oswa binè.

44
00:02:37,560 --> 00:02:43,470
Se konsa, kouman nou eksprime, pou egzanp,
lèt, oswa nimewo, oswa karaktè?

45
00:02:43,470 --> 00:02:45,560
Ak repons lan nan se ASCII.

46
00:02:45,560 --> 00:02:49,380
>> ASCII se yon kat ant pèsonaj
ke nou ta nòmalman wè nan nan

47
00:02:49,380 --> 00:02:53,360
Lang angle tankou yon an, B a,
C a, souliye, tirè, ak

48
00:02:53,360 --> 00:02:54,910
bagay tankou sa.

49
00:02:54,910 --> 00:02:57,260
Epi li kat ki nan yon valè ASCII.

50
00:02:57,260 --> 00:03:03,080
Yon valè ASCII se jis yon nimewo ki
ka konprann pa òdinatè ou.

51
00:03:03,080 --> 00:03:07,430
Ak jis tankou ou ka fè adisyon ak
soustraksyon ak nimewo, ou ka fè

52
00:03:07,430 --> 00:03:10,890
yo ak valè ASCII.

53
00:03:10,890 --> 00:03:14,050
>> Se konsa, nan egzanp sa a, sa ki
sa a pral enprime soti?

54
00:03:14,050 --> 00:03:26,790

55
00:03:26,790 --> 00:03:35,480
Yeah, se konsa jis Yon espas B space space C
D. Ki kote t 'sourit mwen an ale?

56
00:03:35,480 --> 00:03:39,200

57
00:03:39,200 --> 00:03:43,380
Avi ou ka defini yon int nan 65.

58
00:03:43,380 --> 00:03:47,080
Men, lè ou enprime ki soti lè l sèvi avèk
pousan C, li pral entèprete sa kòm yon

59
00:03:47,080 --> 00:03:49,330
karaktè ak pral enprime soti A.

60
00:03:49,330 --> 00:03:52,800
>> Menm jan an tou, ou ka deklare
li kòm yon Char.

61
00:03:52,800 --> 00:03:56,860
Men, lè ou enprime li lè l sèvi avèk pousan
C, li pral entèprete sa kòm

62
00:03:56,860 --> 00:04:05,240
pousan D. Ak jis tankou ou ka ajoute yon
Nimewo, ou ka ajoute karaktè yo

63
00:04:05,240 --> 00:04:06,878
Valè ASCII, nan ka sa a.

64
00:04:06,878 --> 00:04:11,370

65
00:04:11,370 --> 00:04:16,130
>> Se konsa, yon ti kras konsèy pou tout moun.

66
00:04:16,130 --> 00:04:19,610
5, kòm yon fisèl, pa fè sa
aktyèlman egal 5.

67
00:04:19,610 --> 00:04:26,610
Se konsa, ki jan ta ka nou konvèti nan
fisèl 5 a nonb antye relatif la 5?

68
00:04:26,610 --> 00:04:28,930
Nenpòt lide?

69
00:04:28,930 --> 00:04:31,630
Yeah.

70
00:04:31,630 --> 00:04:36,720
>> Se konsa, si nou gen 5 kòm yon fisèl,
nou ka fè soustraksyon 0.

71
00:04:36,720 --> 00:04:37,820
Epi sa pral ban nou 5.

72
00:04:37,820 --> 00:04:41,670
Epi Menm jan an tou, si nou gen 5 kòm yon
nonb antye relatif, ajoute ke yo fisèl la 0.

73
00:04:41,670 --> 00:04:43,112
Ak ki ba nou fisèl la 5.

74
00:04:43,112 --> 00:04:46,350

75
00:04:46,350 --> 00:04:48,350
Fre.

76
00:04:48,350 --> 00:04:52,940
>> Koulye a, sonje tounen nan konferans yon sèl kote
nou te pale de algoritm.

77
00:04:52,940 --> 00:04:57,260
Se konsa, kouman nou aktyèlman vle yon òdinatè
fè bagay sa yo enteresan?

78
00:04:57,260 --> 00:05:00,460
Ou konnen, jis ajoute ak soustraksyon
nimewo ak bagay sa yo enprime soti se pa

79
00:05:00,460 --> 00:05:01,730
ki eksitan.

80
00:05:01,730 --> 00:05:04,620
Anjeneral, nou vle òdinatè nou yo
fè kèk kalite algorithm.

81
00:05:04,620 --> 00:05:07,820
Yon bagay yon ti kras pi plis konplèks
pase jis senp aritmetik.

82
00:05:07,820 --> 00:05:11,930
>> Yon algorithm se jis yon etap pa mete etap
nan enstriksyon yo pou ki jan yo fè

83
00:05:11,930 --> 00:05:14,640
yon task-- sèten

84
00:05:14,640 --> 00:05:15,660
jis tankou yon resèt.

85
00:05:15,660 --> 00:05:19,990
Ou ta ka sonje premye jou a nan
klas kote David te nou konte yon chanm

86
00:05:19,990 --> 00:05:22,550
nan moun ak konbyen moun ki
te nan sal la.

87
00:05:22,550 --> 00:05:24,480
Ou ta ka dwe itilize yo konte
youn pa youn.

88
00:05:24,480 --> 00:05:25,860
1, 2, 3, 4.

89
00:05:25,860 --> 00:05:28,010
Nan ka sa a, yon algorithm tan lineyè.

90
00:05:28,010 --> 00:05:31,710
>> Men, David prezante yon algorithm pou
ou yo konte moun yo nan chanm nan

91
00:05:31,710 --> 00:05:37,340
kote tout moun kanpe leve, ou di ou
Nimewo bay yon lòt moun, ajoute ke

92
00:05:37,340 --> 00:05:39,200
Nimewo moute, ak yon sèl moun chita atè.

93
00:05:39,200 --> 00:05:40,410
Epi ou repete sa.

94
00:05:40,410 --> 00:05:42,910
Sa a yon sèl di ki kalite algorithm.

95
00:05:42,910 --> 00:05:47,520
Nou ka analize ki jan efikas yon
algorithm a baze sou li a kouri tan.

96
00:05:47,520 --> 00:05:49,680
Men, nou pral pale yon ti kras
plis sou sa pita.

97
00:05:49,680 --> 00:05:52,740

98
00:05:52,740 --> 00:05:57,090
>> Se konsa, tout algoritm kapab tou
dwe ekri nan pseudocode.

99
00:05:57,090 --> 00:06:01,120
Pseudocode se jis yon angle tankou
sentaks itilize reprezante

100
00:06:01,120 --> 00:06:02,420
yon lang programmation.

101
00:06:02,420 --> 00:06:06,070
Pou egzanp, si nou te vle mande yon itilizatè
devine nimewo pi renmen m ', nou

102
00:06:06,070 --> 00:06:08,390
ta ka gen pseudocode kòm sa yo.

103
00:06:08,390 --> 00:06:09,850
>> Jwenn yon itilizatè devine.

104
00:06:09,850 --> 00:06:13,570
Si devine nan ki kòrèk, di yo
yo ap kòrèk, lòt moun di yo

105
00:06:13,570 --> 00:06:15,560
yo ap pa kòrèk.

106
00:06:15,560 --> 00:06:22,530
Epi pseudocode se yon fason pou fasil
repwezantan yon lide oswa yon algorithm.

107
00:06:22,530 --> 00:06:26,910
Se konsa, kounye a nou ta ka vle aktyèlman ekri
sa a nan lang la ke òdinatè a

108
00:06:26,910 --> 00:06:27,980
ta ka konprann.

109
00:06:27,980 --> 00:06:35,660
Se konsa, nou ta ka ekri pseudocode nou yo ak
entèprete ki nan kòd sous.

110
00:06:35,660 --> 00:06:41,320
>> Se konsa, lwen, kòd sous dwe respekte
nan yon sentaks sèten nan

111
00:06:41,320 --> 00:06:42,490
yon lang programmation.

112
00:06:42,490 --> 00:06:45,430
Se konsa, lwen, nan CS50, nou te
lè l sèvi avèk sitou c.

113
00:06:45,430 --> 00:06:48,320
Se konsa, sa a ta kapab kòd sous pou c.

114
00:06:48,320 --> 00:06:51,440
Apre sa sou nan kou a, ou lannwit vini
an kontak avèk lòt pwogram

115
00:06:51,440 --> 00:06:52,480
lang tankou PHP.

116
00:06:52,480 --> 00:06:57,540
Oswa si w menm pran lòt klas, ou
ta ka fè Java, Piton, oswa menm OCML.

117
00:06:57,540 --> 00:07:01,570
Men, nan lang pwogram c nou an, sa a se
ki jan nou ta ka ekri kòd la sous pou

118
00:07:01,570 --> 00:07:04,760
algorithm nan pseudocode ki
Mwen jis dekri pi bonè.

119
00:07:04,760 --> 00:07:08,630

120
00:07:08,630 --> 00:07:11,430
>> Se konsa, kouman fè òdinatè w lan aktyèlman
konprann sa?

121
00:07:11,430 --> 00:07:14,490
Tankou mwen te di anvan, li sèlman vrèman
konprann zewo ak inite.

122
00:07:14,490 --> 00:07:17,880
Se konsa, kouman li jwenn soti nan sous la
Kòd nan yon bagay ki ka

123
00:07:17,880 --> 00:07:18,960
konprann?

124
00:07:18,960 --> 00:07:22,920
Oke, nou gen yon bagay
rele yon du.

125
00:07:22,920 --> 00:07:28,450
>> Si ou sonje tounen nan pi fò nan ou
psets, ou te gen kèk kalite pwogram

126
00:07:28,450 --> 00:07:30,370
ekri nan yon dosye dot c.

127
00:07:30,370 --> 00:07:32,550
Lè sa a, ou ta tape fè.

128
00:07:32,550 --> 00:07:35,970
Se konsa, sa se fè ap fè?

129
00:07:35,970 --> 00:07:39,970
>> Ou ka tape fè yo konpile ou
pwogram paske someone--

130
00:07:39,970 --> 00:07:42,730
moun ki va ekri seri p ou;
pwobableman David--

131
00:07:42,730 --> 00:07:44,190
kreye yon dosye fè.

132
00:07:44,190 --> 00:07:51,320
Epi ki di fè yo konnen nan kouri ou
du, ki rele rezone, ki volonte

133
00:07:51,320 --> 00:07:55,560
Lè sa a, konpile kòd sous ou fè objeksyon
Kòd, ki se zewo ak moun yo

134
00:07:55,560 --> 00:07:57,720
ke òdinatè w lan konprann.

135
00:07:57,720 --> 00:08:01,610
Men, yon ti kras pita sou, nou pral ale
plis nan pwofondè sou konpilateur.

136
00:08:01,610 --> 00:08:05,640

137
00:08:05,640 --> 00:08:10,800
>> Se konsa, sonje pset 0, where-- repons lan se wi,
ou gen yon kesyon?

138
00:08:10,800 --> 00:08:11,620
>> ODYANS: [fèbl]?

139
00:08:11,620 --> 00:08:12,490
>> Oratè 1: Wi.

140
00:08:12,490 --> 00:08:14,960
Mwen panse ke yo aktyèlman
yo ta dwe sou entènèt.

141
00:08:14,960 --> 00:08:15,120
Yeah.

142
00:08:15,120 --> 00:08:16,572
>> ODYANS li: Eske se tankou [fèbl]?

143
00:08:16,572 --> 00:08:19,476

144
00:08:19,476 --> 00:08:20,830
>> Oratè 1: Li se pa.

145
00:08:20,830 --> 00:08:25,810
Yo se la sou cs50.net/quizzes.

146
00:08:25,810 --> 00:08:32,900
>> ODYANS: ti tès koupe, koupe 2013,
koupe 0, ak jis klike sou atravè

147
00:08:32,900 --> 00:08:35,956
ti tès 2013 ak egzamen 0,
revize glisad seksyon.

148
00:08:35,956 --> 00:08:40,380
>> Oratè 1: Yeah, se konsa si ou nèg vle
rale li leve ak gade nan l 'sou ou

149
00:08:40,380 --> 00:08:42,740
pwòp òdinatè, ki nan amann tou.

150
00:08:42,740 --> 00:08:43,130
Di sa ankò.

151
00:08:43,130 --> 00:08:44,546
>> ODYANS: [fèbl].

152
00:08:44,546 --> 00:08:48,780
>> Oratè 1: Yeah, [fèbl]
se varyab la egare.

153
00:08:48,780 --> 00:08:49,644
Oh, repons lan se wi?

154
00:08:49,644 --> 00:08:51,372
>> ODYANS: [fèbl]?

155
00:08:51,372 --> 00:08:54,300
>> Oratè 1: Non, grèv
yo pa nan egzamen an.

156
00:08:54,300 --> 00:08:55,950
Padon, kesyon li te ye a, te
grèv nan egzamen an.

157
00:08:55,950 --> 00:08:59,530
Epi li se pa.

158
00:08:59,530 --> 00:09:05,780
Se konsa, pset 0, ou nèg ta dwe gen tout
aplike yon bagay sèvi ak grate.

159
00:09:05,780 --> 00:09:13,100
Apre sa, nou aprann kèk pwogram debaz
blòk bilding lè l sèvi avèk grate.

160
00:09:13,100 --> 00:09:15,590
>> Se konsa, kite a pran yon gade nan kèk
nan eleman debaz sa yo

161
00:09:15,590 --> 00:09:18,170
ki fè moute yon pwogram.

162
00:09:18,170 --> 00:09:20,570
Premye se ekspresyon Boolean.

163
00:09:20,570 --> 00:09:24,540
Ekspresyon Boolean yo se yo menm ak
0 a oswa nenpòt bagay ki gen

164
00:09:24,540 --> 00:09:25,700
de valè posib.

165
00:09:25,700 --> 00:09:30,320
Nan ka sa a, vre oubyen fo,
limen oubyen etenn, ak repons lan se wi oswa ki pa gen.

166
00:09:30,320 --> 00:09:35,390
Yon egzanp sou yon senp, trè senp,
pwogram ki itilize yon Boolean

167
00:09:35,390 --> 00:09:39,140
ekspresyon moute isit la.

168
00:09:39,140 --> 00:09:43,220
>> Se konsa, nan lòd pou ekspresyon Boolean
kapab itil, nou gen operatè Boolean.

169
00:09:43,220 --> 00:09:48,920
Sa yo se operatè ki kapab itilize
yo konpare sèten valè.

170
00:09:48,920 --> 00:09:52,820
Se konsa, nou gen ak ou pa egal a, mwens
pase oswa egal a, pi gran pase oswa

171
00:09:52,820 --> 00:09:55,130
egal a, ak mwens pase
oswa pi gran pase.

172
00:09:55,130 --> 00:09:59,060
Men, sa yo operatè yo pa trè itil
sof si nou ka konbine yo nan

173
00:09:59,060 --> 00:10:00,320
kondisyon.

174
00:10:00,320 --> 00:10:04,370
>> Se konsa, ou nèg ta ka sonje nan grate
ak soti nan p ou kouche ke nou

175
00:10:04,370 --> 00:10:05,400
te gen kondisyon.

176
00:10:05,400 --> 00:10:09,710
Yo se, esansyèlman, tankou fouchèt nan
lojik nan pwogram ou an ki

177
00:10:09,710 --> 00:10:12,670
ègzekutra depann sou si wi ou non
se yon kondisyon rankontre.

178
00:10:12,670 --> 00:10:18,150
Se konsa, youn nan kondisyon sa ke nou te gen
itilize anpil fwa nan kou sa a se nan

179
00:10:18,150 --> 00:10:21,470
si, lòt moun, si, ak kondisyon lòt moun.

180
00:10:21,470 --> 00:10:24,060
>> Isit la nan yon egzanp sou kouman
ou ta ka sèvi ak sa.

181
00:10:24,060 --> 00:10:28,430
nenpòt moun ki konnen diferans ki genyen ant
jis lè l sèvi avèk si deklarasyon tout

182
00:10:28,430 --> 00:10:32,530
wout la desann vèsè si, lòt moun,
si, e lòt bagay konbine?

183
00:10:32,530 --> 00:10:33,013
Wi?

184
00:10:33,013 --> 00:10:34,263
>> ODYANS: [fèbl].

185
00:10:34,263 --> 00:10:40,741

186
00:10:40,741 --> 00:10:42,160
>> Oratè 1: Egzakteman.

187
00:10:42,160 --> 00:10:50,210
Se konsa, si mwen te gen si tout wout la desann sa a
fason sa a, menm si kondisyon sa a retounen

188
00:10:50,210 --> 00:10:52,800
vre, li ap toujou kontinye
tès de kap vini an.

189
00:10:52,800 --> 00:11:00,120
Lè nou konsidere ke, ak yon-si lòt moun, yon lòt moun
deklarasyon, si yon sèl nan retounen vre,

190
00:11:00,120 --> 00:11:02,640
lòt moun yo pa fè tès.

191
00:11:02,640 --> 00:11:05,955
Nenpòt kesyon sou sa?

192
00:11:05,955 --> 00:11:06,890
Fre.

193
00:11:06,890 --> 00:11:12,240
>> Se konsa, ou sèvi ak yon lòt moun si-nan yon lòt bagay
deklarasyon si ou konnen ke li kapab sèlman

194
00:11:12,240 --> 00:11:14,470
dwe youn nan ka sa yo.

195
00:11:14,470 --> 00:11:21,550
Se konsa, nou konnen si x se pi piti pase 0, li nan
definitivman pa pral fè

196
00:11:21,550 --> 00:11:22,890
pi gran pase 0.

197
00:11:22,890 --> 00:11:26,940

198
00:11:26,940 --> 00:11:31,480
>> Next, yon lòt eleman debaz
ki nou te aprann yo se pasan.

199
00:11:31,480 --> 00:11:33,310
Nou gen twa kalite pasan.

200
00:11:33,310 --> 00:11:35,830
Pou pasan, pandan y ap pasan,
ak fè pandan y ap pasan.

201
00:11:35,830 --> 00:11:38,730
Epi jeneralman, lè ou chita
ekri yon bagay, ou gen deside

202
00:11:38,730 --> 00:11:40,060
ki nan twa nan ou vle itilize.

203
00:11:40,060 --> 00:11:41,900
Se konsa, ki jan nou deside ki youn?

204
00:11:41,900 --> 00:11:44,920

205
00:11:44,920 --> 00:11:48,790
>> Nou jeneralman itilize yon riban pou si nou konnen
konbyen fwa nou vle repekte

206
00:11:48,790 --> 00:11:53,650
atravè yon bagay oswa konbyen fwa
nou vle fè yon travay.

207
00:11:53,650 --> 00:11:58,830
Nou itilize pandan y ap pasan si nou bezwen kèk
kondisyon yo dwe vre kenbe kouri.

208
00:11:58,830 --> 00:12:03,730
Epi nou itilize fè pandan y ap trè menm jan ak
pandan y ap, men nou vle Kòd nou yo kouri nan

209
00:12:03,730 --> 00:12:04,880
omwen yon sèl fwa.

210
00:12:04,880 --> 00:12:09,410
>> Se konsa, fè ti tan, tou sa se nan fè a pral
toujou kouri omwen yon fwa.

211
00:12:09,410 --> 00:12:13,120
Lè nou konsidere ke, ak pandan y ap a, li
pa ka kouri nan tout si la

212
00:12:13,120 --> 00:12:15,490
kondisyon pa satisfè.

213
00:12:15,490 --> 00:12:16,740
Nenpòt kesyon ak sa?

214
00:12:16,740 --> 00:12:20,480

215
00:12:20,480 --> 00:12:22,860
>> Se konsa, estrikti nan yon riban pou.

216
00:12:22,860 --> 00:12:23,620
Ou nèg te tout wè sa a.

217
00:12:23,620 --> 00:12:25,320
Ou inisyalize li.

218
00:12:25,320 --> 00:12:26,600
Ou gen kèk kalite kondisyon.

219
00:12:26,600 --> 00:12:32,340
Se konsa,, pou egzanp, nou ta ka inisyalize
kòm pou mwen egal 0.

220
00:12:32,340 --> 00:12:34,040
mwen se mwens pase 10.

221
00:12:34,040 --> 00:12:35,442
Apre sa, mwen ++.

222
00:12:35,442 --> 00:12:39,010
Yon sèl trè senp ke nou te fè.

223
00:12:39,010 --> 00:12:42,210
>> Pou yon riban pandan y ap, menm jan an tou, ou gen
gen kèk kalite inisyalizasyon,

224
00:12:42,210 --> 00:12:44,980
kèk kalite kondisyon, ak
kèk kalite aktyalizasyon.

225
00:12:44,980 --> 00:12:51,990
Se konsa, nou ka aplike nou an pou riban tou
kòm yon riban pandan y ap lè l sèvi avèk sa a.

226
00:12:51,990 --> 00:12:56,000
Epi Menm jan an tou ak yon fè pandan riban,
nou ta ka gen kèk inisyalizasyon,

227
00:12:56,000 --> 00:12:58,640
egzekite yon bagay, mete li, ak
Lè sa a, tcheke kondisyon an.

228
00:12:58,640 --> 00:13:03,500

229
00:13:03,500 --> 00:13:05,140
>> Se konsa, kounye fonksyon.

230
00:13:05,140 --> 00:13:06,460
Nou mete tout bagay ansanm.

231
00:13:06,460 --> 00:13:10,140
Nou ta ka vle ekri kèk
kalite fonksyon.

232
00:13:10,140 --> 00:13:12,790
Komen fonksyon ki ou ta ka
te wè deja se prensipal la.

233
00:13:12,790 --> 00:13:13,770
Prensipal la se yon fonksyon.

234
00:13:13,770 --> 00:13:16,160
Li te gen yon kalite retou, int.

235
00:13:16,160 --> 00:13:18,470
Li te gen yon non fonksyon, prensipal la.

236
00:13:18,470 --> 00:13:20,810
Epi li gen agiman, arg ak argv.

237
00:13:20,810 --> 00:13:24,040
Se konsa, prensipal la se jis yon fonksyon.

238
00:13:24,040 --> 00:13:27,230
>> Lòt fonksyon ou ta ka te itilize,
printf printf se yon function--

239
00:13:27,230 --> 00:13:29,330
GetInt, toupper.

240
00:13:29,330 --> 00:13:32,010
Men, sa yo rive yo te
aplike pou nou pa

241
00:13:32,010 --> 00:13:33,270
kèk kalite bibliyotèk.

242
00:13:33,270 --> 00:13:37,400
Si ou nèg sonje ki gen ladan
bibliyotèk sa a CS50.h oswa nan

243
00:13:37,400 --> 00:13:38,510
estanda I / O bibliyotèk.

244
00:13:38,510 --> 00:13:39,200
Wi, kesyon?

245
00:13:39,200 --> 00:13:41,610
>> ODYANS: Èske prensipal jis nannan nan c?

246
00:13:41,610 --> 00:13:44,740
Èske li jis kalite [fèbl]?

247
00:13:44,740 --> 00:13:47,370
>> Oratè 1: Kesyon an se
si prensipal la se nannan nan c.

248
00:13:47,370 --> 00:13:51,460
E wi, tout fonksyon
gen yon fonksyon prensipal.

249
00:13:51,460 --> 00:13:55,290
Li nan kalite ki nesesè pou òdinatè a
pou konnen kote pou kòmanse

250
00:13:55,290 --> 00:13:55,993
kouri kòd la.

251
00:13:55,993 --> 00:13:58,108
>> ODYANS: Se konsa, ou pa t 'vle [fèbl]?

252
00:13:58,108 --> 00:13:59,480
>> Oratè 1: No

253
00:13:59,480 --> 00:14:00,760
Nenpòt lòt kesyon?

254
00:14:00,760 --> 00:14:03,430

255
00:14:03,430 --> 00:14:04,770
Fre.

256
00:14:04,770 --> 00:14:08,050
Se konsa, jis tankou ou ka sèvi ak yon fonksyon
ki nan ekri pou ou, ou kapab tou

257
00:14:08,050 --> 00:14:10,380
ekri fonksyon pwòp ou yo.

258
00:14:10,380 --> 00:14:17,050
Sa a se yon fonksyon ke yon moun ta ka
te ekri a kalkile volim nan

259
00:14:17,050 --> 00:14:18,395
nan yon q, pou egzanp.

260
00:14:18,395 --> 00:14:21,300

261
00:14:21,300 --> 00:14:29,500
Genyen yon kalite retounen isit la, nan ka sa a
int, nou q Non fonksyon ak nou an

262
00:14:29,500 --> 00:14:31,360
lis paramèt.

263
00:14:31,360 --> 00:14:34,550
>> Epi sonje ke ou gen yo ekri done yo
di ki kalite paramèt la ou vle

264
00:14:34,550 --> 00:14:38,660
itilize oswa lòt moun fonksyon an fè sa ki pa
konnen ki kalite

265
00:14:38,660 --> 00:14:41,650
paramèt pou m 'ta aksepte.

266
00:14:41,650 --> 00:14:48,110
Se konsa, nan ka sa a, nou vle
yon nonb antye relatif kòm opinyon nou an.

267
00:14:48,110 --> 00:14:50,390
Se konsa, poukisa nou ta ka vle itilize fonksyon?

268
00:14:50,390 --> 00:14:52,800
>> Premye a tout, gwo pou òganizasyon.

269
00:14:52,800 --> 00:14:56,350
Yo ede kraze moute Kòd ou a nan
plis òganize fragman epi fè

270
00:14:56,350 --> 00:14:57,960
li pi fasil li.

271
00:14:57,960 --> 00:14:59,760
Senplifikasyon.

272
00:14:59,760 --> 00:15:01,740
Sa a se bon pou konsepsyon.

273
00:15:01,740 --> 00:15:04,570
Lè w ap li yon moso nan Kòd
ak fonksyon prensipal la se vrèman,

274
00:15:04,570 --> 00:15:07,750
reyèlman long, li ta kapab pi rèd
Rezon ki fè sou sa k ap pase sou.

275
00:15:07,750 --> 00:15:11,710
Se konsa, si ou kraze li desann nan fonksyon,
li ta kapab pi fasil li.

276
00:15:11,710 --> 00:15:12,750
Epi jam itilize-kapasite.

277
00:15:12,750 --> 00:15:16,940
Si ou gen yon ti moso nan Kòd ki nan ke yo te
rele oswa kouri plizyè fwa,

278
00:15:16,940 --> 00:15:20,690
olye pou yo reekri ke kòd 10 fwa
nan fonksyon prensipal ou an, ou ta ka

279
00:15:20,690 --> 00:15:21,440
vle jam itilize li.

280
00:15:21,440 --> 00:15:25,740
Lè sa a, chak fwa ou bezwen sèvi ak ki
moso nan Kòd, rele fonksyon an.

281
00:15:25,740 --> 00:15:30,550

282
00:15:30,550 --> 00:15:35,380
>> Se konsa, kounye a, si nou sonje tounen nan grafouyen,
nou menm tou nou te pale osijè de yon konsèp kèk,

283
00:15:35,380 --> 00:15:37,680
youn nan ki se anfile.

284
00:15:37,680 --> 00:15:41,120
Thread se konsèp nan miltip
sekans nan Kòd

285
00:15:41,120 --> 00:15:43,040
egzekite nan menm tan an.

286
00:15:43,040 --> 00:15:47,490
Se konsa, panse tounen nan jou yon sèl kote David te gen
ou nèg konte koupe nimewo a nan

287
00:15:47,490 --> 00:15:48,440
moun ki nan sal la.

288
00:15:48,440 --> 00:15:50,550
>> Esansyèlman, sa ki te ale
sou se tout nan ou nèg yo te

289
00:15:50,550 --> 00:15:52,370
kouri fil apa.

290
00:15:52,370 --> 00:15:55,540
Ak moun ki fil yo te vini ansanm
yo ka resevwa kèk kalite repons.

291
00:15:55,540 --> 00:15:58,890
Menm jan tou, nan grafouyen, lè ou gen
miltip sprites, ou ta ka

292
00:15:58,890 --> 00:16:01,070
gen yon chat ak yon chen.

293
00:16:01,070 --> 00:16:08,770
Apre sa, yo ta dwe an menm tan
kouri Scripts pwòp yo.

294
00:16:08,770 --> 00:16:10,020
Sa se yon egzanp nan anfile.

295
00:16:10,020 --> 00:16:12,860

296
00:16:12,860 --> 00:16:18,000
>> Ak konsèp nan lòt ki te
prezante nan grate te evènman yo.

297
00:16:18,000 --> 00:16:22,550
Ak evènman yo se lè miltip pati nan
kòd ou kominike youn ak lòt.

298
00:16:22,550 --> 00:16:26,840
Nan grafouyen, sa a te lè ou te itilize nan
difizyon kontwòl ak Lè an mwen

299
00:16:26,840 --> 00:16:29,500
Resevwa blòk.

300
00:16:29,500 --> 00:16:35,170
>> Epi tou, nan Set Pwoblèm 4, nou te wè
yon ti kras nan evènman kòm byen.

301
00:16:35,170 --> 00:16:38,250
Ou nèg ta ka te itilize
bibliyotèk la Gevent.

302
00:16:38,250 --> 00:16:42,450
Se konsa te gen yon fonksyon waitForClick
nan ki ou te ap tann

303
00:16:42,450 --> 00:16:44,300
pou itilizatè a klike sou.

304
00:16:44,300 --> 00:16:47,870
Epi klike sou ou, nan ka sa a, ta dwe
evènman an epi tann pou klike sou se ou

305
00:16:47,870 --> 00:16:49,120
evènman kap okipe.

306
00:16:49,120 --> 00:16:53,690

307
00:16:53,690 --> 00:16:58,630
>> Epi tou, pandan tout kouri psets ou
ak ap travay sou psets ou, ou

308
00:16:58,630 --> 00:17:01,920
ta ka yo te vin an kontak avèk
kèk nan kòmandman sa yo.

309
00:17:01,920 --> 00:17:05,579
Sa a se ki sa ou tape nan ou
fenèt tèminal oswa kèlkeswa sa fenèt

310
00:17:05,579 --> 00:17:12,119
ki montre moute sou modifye g ou a,
esansyèlman, navige òdinatè ou.

311
00:17:12,119 --> 00:17:19,440
>> Se konsa, pou egzanp, LS bay lis la
sa nan yon anyè.

312
00:17:19,440 --> 00:17:22,510
Fè anyè kreye yon nouvo dosye.

313
00:17:22,510 --> 00:17:24,819
CD, chanjman anyè.

314
00:17:24,819 --> 00:17:28,400
RM, retire, supresyon yon dosye
oswa kèk anyè.

315
00:17:28,400 --> 00:17:31,050
Lè sa a, retire anyè
retire yon anyè.

316
00:17:31,050 --> 00:17:32,300
>> ODYANS: [fèbl]?

317
00:17:32,300 --> 00:17:36,978

318
00:17:36,978 --> 00:17:38,370
>> Oratè 1: Yeah, asire w.

319
00:17:38,370 --> 00:17:42,530

320
00:17:42,530 --> 00:17:46,040
Padon, kesyon an te si ou
ta sijere mete sa a

321
00:17:46,040 --> 00:17:48,840
sou fèy la twonpe.

322
00:17:48,840 --> 00:17:49,440
Li ta kapab ede.

323
00:17:49,440 --> 00:17:51,490
Si ou gen chanm, ou ka mete l 'sou.

324
00:17:51,490 --> 00:17:56,170
Li la tou jis jeneralman bon ase
yo sonje paske lè ou sèvi ak li

325
00:17:56,170 --> 00:17:59,060
ou ta ka vle jis
genyen li memorize.

326
00:17:59,060 --> 00:18:02,750
Sa pral fè lavi ou yon anpil pi fasil.

327
00:18:02,750 --> 00:18:04,000
Èske mwen reponn kesyon ou a?

328
00:18:04,000 --> 00:18:10,528

329
00:18:10,528 --> 00:18:14,290
>> Se konsa, kounye a, nou te pale yon ti kras
yon ti tan sou bibliyotèk yo.

330
00:18:14,290 --> 00:18:18,570
Men, de yo menm ki prensipal ke nou ve yo te
lè l sèvi avèk byen lwen tèlman nan kou a yo se

331
00:18:18,570 --> 00:18:20,860
estanda I / O ak cs50.

332
00:18:20,860 --> 00:18:25,410
Ki kalite bagay sa yo yo enkli
nan mwen / O bibliyotèk la estanda?

333
00:18:25,410 --> 00:18:28,410
>> Yeah, se konsa byen lwen nou te itilize printf.

334
00:18:28,410 --> 00:18:31,150
Nan cs50, nou te itilize GetInt
ak GetString.

335
00:18:31,150 --> 00:18:37,200
Ak fisèl la kalite done tou k ap pase
yo dwe deklare nan sa a bibliyotèk cs50.

336
00:18:37,200 --> 00:18:40,250
Nou pral pale yon ti kras plis an pwofondè sou
ki jan bibliyotèk travay ak ki jan yo

337
00:18:40,250 --> 00:18:41,870
kominike avèk rès la nan kòd ou a.

338
00:18:41,870 --> 00:18:46,220
Men, moun yo se de yo menm ki prensipal ke nou
te vin an kontak avèk byen lwen tèlman nan

339
00:18:46,220 --> 00:18:48,430
kou a.

340
00:18:48,430 --> 00:18:50,050
>> Kalite.

341
00:18:50,050 --> 00:18:58,120
Sa yo se bon sonje konbyen lajan
se chak kalite reprezante pa oswa ki jan

342
00:18:58,120 --> 00:19:02,840
anpil bytes chak nan kalite requires--

343
00:19:02,840 --> 00:19:04,990
int, 4 bytes; Char, 1 multiple.

344
00:19:04,990 --> 00:19:06,550
Flote se 4 bytes.

345
00:19:06,550 --> 00:19:07,782
Ki sa ki se yon doub?

346
00:19:07,782 --> 00:19:09,032
>> ODYANS: [fèbl].

347
00:19:09,032 --> 00:19:11,398

348
00:19:11,398 --> 00:19:16,240
>> Oratè 1: Yeah, se konsa yon flote
men double gwosè a.

349
00:19:16,240 --> 00:19:17,150
Ki sa ki sou yon long?

350
00:19:17,150 --> 00:19:18,400
>> ODYANS: [fèbl].

351
00:19:18,400 --> 00:19:21,614

352
00:19:21,614 --> 00:19:24,680
>> Oratè 1: OK.

353
00:19:24,680 --> 00:19:25,410
Ki sa ki se yon long?

354
00:19:25,410 --> 00:19:26,660
>> ODYANS: [fèbl].

355
00:19:26,660 --> 00:19:29,400

356
00:19:29,400 --> 00:19:31,450
>> Oratè 1: Yeah, double yon Int.

357
00:19:31,450 --> 00:19:34,240

358
00:19:34,240 --> 00:19:34,705
Wi.

359
00:19:34,705 --> 00:19:36,100
>> ODYANS: [fèbl].

360
00:19:36,100 --> 00:19:38,030
>> Oratè 1: Long [fèbl].

361
00:19:38,030 --> 00:19:41,860
Lè sa a, yon long lontan se doub sa.

362
00:19:41,860 --> 00:19:42,814
>> ODYANS: Non, pa gen okenn.

363
00:19:42,814 --> 00:19:47,107
Yon long se jis yon Int.

364
00:19:47,107 --> 00:19:50,910
Sa depann de ki achitekti a
anvan [fèbl la]

365
00:19:50,910 --> 00:19:52,922
ak int gen gwosè nan menm.

366
00:19:52,922 --> 00:19:54,172
[Fèbl].

367
00:19:54,172 --> 00:19:58,841

368
00:19:58,841 --> 00:20:00,920
>> Oratè 1: Se konsa, yon long ak
yon int yo se menm bagay la.

369
00:20:00,920 --> 00:20:02,943
Lè sa a, yon long long
se doub Int la.

370
00:20:02,943 --> 00:20:03,910
Fre.

371
00:20:03,910 --> 00:20:05,550
Lè sa a,, ki sa ki kalite nan sot pase a?

372
00:20:05,550 --> 00:20:06,510
>> ODYANS: konsèy.

373
00:20:06,510 --> 00:20:10,350
>> Oratè 1: Yeah, se konsa nou te aprann
yon ti kras sou pwent.

374
00:20:10,350 --> 00:20:14,015
Ak kèlkeswa sa ki yon konsèy se
lonje dwèt to-- li te kapab fè yon etwal Char

375
00:20:14,015 --> 00:20:15,880
oswa yon int star--

376
00:20:15,880 --> 00:20:20,530
li la toujou 4 bytes pou yon konsèy.

377
00:20:20,530 --> 00:20:21,633
Kesyon sou sa?

378
00:20:21,633 --> 00:20:22,116
Wi?

379
00:20:22,116 --> 00:20:24,531
>> ODYANS: [fèbl]?

380
00:20:24,531 --> 00:20:29,530
>> Oratè 1: Se konsa, yon long ak yon int yo
menm bagay la tou nan sa a aparèy cs50.

381
00:20:29,530 --> 00:20:32,302
>> ODYANS: aparèy nan yo konplètman
ka ranplase.

382
00:20:32,302 --> 00:20:33,510
>> Oratè 1: Yeah.

383
00:20:33,510 --> 00:20:36,610
Se konsa, lè sa a yon se lontan lontan doub yon Int.

384
00:20:36,610 --> 00:20:39,250
>> ODYANS: Sa a se ti jan nan 32?

385
00:20:39,250 --> 00:20:40,620
>> Oratè 1: 32 ti jan, yeah.

386
00:20:40,620 --> 00:20:43,572
>> ODYANS: Se konsa [fèbl]?

387
00:20:43,572 --> 00:20:46,790
>> Oratè 1: Wi, si li pa fè sa
klèman di, ou

388
00:20:46,790 --> 00:20:47,870
ta dwe asime yon ti jan 32.

389
00:20:47,870 --> 00:20:50,040
>> ODYANS: Li ta di yon bagay
tankou asepte yon

390
00:20:50,040 --> 00:20:51,498
achitekti tankou aparèy la.

391
00:20:51,498 --> 00:20:58,800

392
00:20:58,800 --> 00:21:01,710
Pou 64 ti jan, bagay sa yo sèlman ki
chanjman yo fin fou ak endikasyon.

393
00:21:01,710 --> 00:21:05,614
Yo tou de [fèbl].

394
00:21:05,614 --> 00:21:06,590
>> Oratè 1: Wi?

395
00:21:06,590 --> 00:21:07,566
>> ODYANS: Kesyon.

396
00:21:07,566 --> 00:21:10,982
Se konsa, sou youn nan ti tès yo pratike,
li mande sou yon Int siye.

397
00:21:10,982 --> 00:21:15,374
Se konsa, ki jan ta ki dwe detèmine
soti nan yon int [fèbl]?

398
00:21:15,374 --> 00:21:18,140
>> Oratè 1: Yon siye
nan se tou 4 bytes.

399
00:21:18,140 --> 00:21:21,172
Men, sa ki se diferan sou yon siyen
int ak yon Int siye?

400
00:21:21,172 --> 00:21:22,422
>> ODYANS: [fèbl].

401
00:21:22,422 --> 00:21:24,868

402
00:21:24,868 --> 00:21:25,630
>> Oratè 1: Dwa.

403
00:21:25,630 --> 00:21:27,570
Yon moun kapab reprezante valè negatif.

404
00:21:27,570 --> 00:21:28,580
Men, ki jan li fè sa?

405
00:21:28,580 --> 00:21:30,536
>> ODYANS: [fèbl].

406
00:21:30,536 --> 00:21:36,370
>> Oratè 1: Yeah, l ap fè ekonomi 1
ti jan ki reprezante siy lan.

407
00:21:36,370 --> 00:21:40,910

408
00:21:40,910 --> 00:21:45,040
Siyen gen nan yon sèl ti jan ki
reprezante siy lan.

409
00:21:45,040 --> 00:21:48,886
Ak siye jis se tout positifs.

410
00:21:48,886 --> 00:21:50,365
>> ODYANS: OK.

411
00:21:50,365 --> 00:21:54,230
Se konsa, ou di ke yon doub se
de fwa gwosè a nan yon flote?

412
00:21:54,230 --> 00:21:58,202
>> Oratè 1: Double se de fwa
gwosè a nan yon flote, wi.

413
00:21:58,202 --> 00:22:01,639
>> ODYANS: Kijan yon konsèy
nan yon long lontan [fèbl]?

414
00:22:01,639 --> 00:22:06,058

415
00:22:06,058 --> 00:22:10,870
>> Oratè 1: Se konsa, kesyon an se ki jan fè
konsèy la nan yon long-- long

416
00:22:10,870 --> 00:22:13,800
ki jan se ke se sèlman kat bytes lè
yon long lontan bytes li yo 8.

417
00:22:13,800 --> 00:22:17,310
Se konsa, sonje sa ki se yon konsèy,
esansyèlman, nan valè a anpil baz.

418
00:22:17,310 --> 00:22:19,046
>> ODYANS: [fèbl].

419
00:22:19,046 --> 00:22:22,670
>> Oratè 1: Yeah, se konsa yon konsèy
se jis yon kote memwa.

420
00:22:22,670 --> 00:22:28,040
Se konsa, li pa gen pwoblèm ki jan anpil espas
ki konsèy ap montre yo.

421
00:22:28,040 --> 00:22:32,060
Li sèlman bezwen 4 bytes nan kenbe tras
nan ki kote memwa.

422
00:22:32,060 --> 00:22:34,760

423
00:22:34,760 --> 00:22:36,010
Nenpòt lòt kesyon?

424
00:22:36,010 --> 00:22:39,800

425
00:22:39,800 --> 00:22:41,050
Fre.

426
00:22:41,050 --> 00:22:42,920

427
00:22:42,920 --> 00:22:47,460
>> Se konsa, bagay la pase mwen gen
se estanda pwodiksyon.

428
00:22:47,460 --> 00:22:51,020
Ou ta dwe sèvi ak yo souvan
ase ke ou ka sonje.

429
00:22:51,020 --> 00:22:54,800
Men, sa a se lè nou sèvi ak
printf, pou egzanp.

430
00:22:54,800 --> 00:22:59,260
Epi nou gen placeholders sa yo ki
te rele kòd fòma.

431
00:22:59,260 --> 00:23:03,910
>> Se konsa, pousan c Char, pousan mwen pou Int,
epi nou ka tou itilize pousan d.

432
00:23:03,910 --> 00:23:05,130
Li nan menm bagay la.

433
00:23:05,130 --> 00:23:08,200
Men, jeneralman, nan CS50 nou
eseye sèvi ak pousan mwen.

434
00:23:08,200 --> 00:23:09,860
Pousan f pou flote.

435
00:23:09,860 --> 00:23:15,620
Pousan LD pou lontan long ak
pousan a pou fisèl.

436
00:23:15,620 --> 00:23:18,550
>> Menm jan tou, nou ve yo te lè l sèvi avèk yon kèk
nan sekans chape sa yo.

437
00:23:18,550 --> 00:23:22,431
Pou egzanp, antislach n pou nouvo liy.

438
00:23:22,431 --> 00:23:26,910
Sa a se jis pou lè w ap fòma
kòd ou a pou ekri an lèt detache f.

439
00:23:26,910 --> 00:23:27,260
Wi?

440
00:23:27,260 --> 00:23:28,906
>> ODYANS: Ki sa ki pousan d pou?

441
00:23:28,906 --> 00:23:31,850
>> Oratè 1: Se konsa, kesyon an
se ki sa ki pousan d pou?

442
00:23:31,850 --> 00:23:33,270
Pousan d se pou antye.

443
00:23:33,270 --> 00:23:37,392
Pousan d ak pousan mwen yo se menm bagay la.

444
00:23:37,392 --> 00:23:41,130
>> ODYANS: Ki sa ki nan diferans ki genyen ant
antislach n ak antislach r?

445
00:23:41,130 --> 00:23:45,300
>> Oratè 1: Se konsa, kesyon an se sa ki nan la
diferans ki genyen ant repèkisyon n ak

446
00:23:45,300 --> 00:23:48,615
repèkisyon r?

447
00:23:48,615 --> 00:23:50,906
Mwen panse ke antislach r is--

448
00:23:50,906 --> 00:23:54,340
>> ODYANS: Se konsa antislach r jis implique
retounen nan nan konmansman an nan liy lan

449
00:23:54,340 --> 00:23:56,670
san yo pa aktyèlman ale nan yon liy nouvo.

450
00:23:56,670 --> 00:24:01,000
Se konsa, si ou enprime yon r antislach epi ou
ale tounen nan kòmansman an nan liy lan

451
00:24:01,000 --> 00:24:04,005
Lè sa a, ou enprime plis bagay, ou recouvrir
bagay la sa a, se deja sou

452
00:24:04,005 --> 00:24:04,390
[Fèbl].

453
00:24:04,390 --> 00:24:06,725
Lè nou konsidere ke, n aktyèlman ale nan yon nouvo
liy ak ale nan [fèbl].

454
00:24:06,725 --> 00:24:10,525

455
00:24:10,525 --> 00:24:13,915
>> Oratè 1: Bon, nenpòt lòt kesyon?

456
00:24:13,915 --> 00:24:15,430
Tout dwa.

457
00:24:15,430 --> 00:24:18,617
Mwen pral lage li yo ale nan
Dan ki ap kontinye.

458
00:24:18,617 --> 00:24:25,078
>> [Aplodisman]

459
00:24:25,078 --> 00:25:08,814

460
00:25:08,814 --> 00:25:09,720
>> DAN: Tout righty.

461
00:25:09,720 --> 00:25:18,590
Se konsa, mwen pral pale sou yon lòt lajè
ran de lide nan klas la ki

462
00:25:18,590 --> 00:25:23,220
apeprè reprezantan nan semèn de ak
kòmansman an nan semèn twa kòmanse koupe

463
00:25:23,220 --> 00:25:28,690
ak Distribisyon, ki se jis yon fason pou
trete yon valè de yon kalite sèten kòm

464
00:25:28,690 --> 00:25:30,830
yon valè de yon kalite diferan.

465
00:25:30,830 --> 00:25:34,110
Se konsa, nou ka fè sa ak charaktèr
antye, flote antye, ak

466
00:25:34,110 --> 00:25:35,360
fin fou lontan a doub.

467
00:25:35,360 --> 00:25:38,170

468
00:25:38,170 --> 00:25:44,500
>> Tout bagay sa yo kapab itilize yo kòm fason
nan trete kèk nimerik valè

469
00:25:44,500 --> 00:25:48,370
Char mwens tankou kèk lòt
nimerik valè.

470
00:25:48,370 --> 00:25:54,480
Se konsa, gen kèk pwoblèm ak sa a, nan
kou, ki vini lè ou jete

471
00:25:54,480 --> 00:25:57,860
bagay sa yo tankou flote antye.

472
00:25:57,860 --> 00:26:00,500
Se konsa, sa a se yon ti kras etranj.

473
00:26:00,500 --> 00:26:03,170
Nou gen yon flote ki se 1.31.

474
00:26:03,170 --> 00:26:05,220
Nou miltipliye li pa 10,000.

475
00:26:05,220 --> 00:26:08,380
Lè sa a, nou enprime li kòm yon Int.

476
00:26:08,380 --> 00:26:09,630
Ki sa pwodiksyon sa a?

477
00:26:09,630 --> 00:26:11,600

478
00:26:11,600 --> 00:26:14,020
10,000 fwa 1.31.

479
00:26:14,020 --> 00:26:18,761
Se konsa, 13,000, se ke devine a?

480
00:26:18,761 --> 00:26:20,685
>> ODYANS: Mwen panse ke li nan 10,000.

481
00:26:20,685 --> 00:26:24,234
>> DAN: Se konsa, mwen miltipliye li pa 10,000
anvan mwen depoze li.

482
00:26:24,234 --> 00:26:25,202
>> ODYANS: Oh.

483
00:26:25,202 --> 00:26:27,622
Pa ta gen fè yon sèl 9
ak kèk 0 nimewo?

484
00:26:27,622 --> 00:26:29,270
>> DAN: Ou ta ka gen kèk chif etranj.

485
00:26:29,270 --> 00:26:32,410

486
00:26:32,410 --> 00:26:37,670
Se konsa, dwa, li nan 1.3 fwa 10,000.

487
00:26:37,670 --> 00:26:40,040
Se konsa, se 13,000.

488
00:26:40,040 --> 00:26:41,313
Lè sa a weird-- siplemantè

489
00:26:41,313 --> 00:26:42,160
>> ODYANS: 13.100.

490
00:26:42,160 --> 00:26:42,650
>> DAN: 13.100.

491
00:26:42,650 --> 00:26:44,910
Mèsi poutèt ou, Rob.

492
00:26:44,910 --> 00:26:46,610
Lè sa a weirdness-- siplemantè

493
00:26:46,610 --> 00:26:48,060
sa a 9,9--

494
00:26:48,060 --> 00:26:53,860
se tou senpleman paske Distribisyon sa a
te fini awondi desann kote

495
00:26:53,860 --> 00:26:55,394
li pa ta dwe gen.

496
00:26:55,394 --> 00:26:55,871
Yeah.

497
00:26:55,871 --> 00:26:58,256
>> ODYANS: Distribisyon nan k ap pase
apre nenpòt lòt bagay?

498
00:26:58,256 --> 00:27:03,865
>> DAN: Se konsa, paske mwen gen sa a nan ekri ak lèt ​​detache, li
fè miltiplikasyon sa a anvan li

499
00:27:03,865 --> 00:27:05,230
fè Distribisyon sa a.

500
00:27:05,230 --> 00:27:06,140
>> ODYANS: [fèbl].

501
00:27:06,140 --> 00:27:11,350
>> DAN: Mwen panse ke li ta jete premye,
yeah, ki ta dwe 10,000.

502
00:27:11,350 --> 00:27:12,610
Nenpòt lòt bagay?

503
00:27:12,610 --> 00:27:13,330
Fre.

504
00:27:13,330 --> 00:27:16,344
Se konsa, sa a se 13.099.

505
00:27:16,344 --> 00:27:17,840
Poukisa sa te rive?

506
00:27:17,840 --> 00:27:18,900
Enpresizyon.

507
00:27:18,900 --> 00:27:21,020
>> Flote yo pa pafè.

508
00:27:21,020 --> 00:27:27,550
Yo kapab sèlman reprezante nonb nan yon
sèten kantite figi enpòtan.

509
00:27:27,550 --> 00:27:35,120
Se konsa, si nou enprime soti 8 sig fig frans sou
flote sa a, nou jwenn yon kalite

510
00:27:35,120 --> 00:27:36,800
lèd Nimewo kap.

511
00:27:36,800 --> 00:27:45,580
Epi sa a, paske 1.31 pa kapab avèk presizyon
dwe reprezante pa senp

512
00:27:45,580 --> 00:27:49,000
pouvwa nan de nan machin nan.

513
00:27:49,000 --> 00:27:53,530
Se konsa, li fini moute pran pi pre a
devine, ki fini moute

514
00:27:53,530 --> 00:27:55,710
ke yo te yon ti kras ki ba.

515
00:27:55,710 --> 00:27:57,730
Fè sans?

516
00:27:57,730 --> 00:27:59,110
OK.

517
00:27:59,110 --> 00:28:05,840
>> Koulye a, chanje yo se yon fason diferan nan
fè deklarasyon kondisyonèl kote tout

518
00:28:05,840 --> 00:28:09,900
nou pran swen sou se yon varyab sèl.

519
00:28:09,900 --> 00:28:16,570
Se konsa, nan egzanp sa a an patikilye, nou ap
ap resevwa yon nonb antye relatif soti nan itilizatè a.

520
00:28:16,570 --> 00:28:21,070
Lè sa a, nou ap chèche a
ki sa sa nonb antye relatif se.

521
00:28:21,070 --> 00:28:23,500
Assume, li nan nimewo
ant youn ak kat.

522
00:28:23,500 --> 00:28:24,800
Sa a ki sa nou ap mande pou.

523
00:28:24,800 --> 00:28:28,450
>> Se konsa, ou fè yon switch nan
non an varyab.

524
00:28:28,450 --> 00:28:34,290
Lè sa a, ou mete kanpe ka nan posib
valè li te kapab.

525
00:28:34,290 --> 00:28:37,730
Se konsa, ka yon sèl, di li nan ba.

526
00:28:37,730 --> 00:28:41,080
Lè sa a, ou kase jwenn soti
nan kondisyon an switch konsa

527
00:28:41,080 --> 00:28:43,270
ou pa kenbe prale.

528
00:28:43,270 --> 00:28:44,830
>> Nan case-- nan pwochen

529
00:28:44,830 --> 00:28:46,940
se konsa ka de ak ka three--

530
00:28:46,940 --> 00:28:51,920
si li nan ka de li jis gout desann nan
liy lan premye nan Kòd li wè menm jan ak

531
00:28:51,920 --> 00:28:55,400
Ka twa jiskaske li wè yon ti repo.

532
00:28:55,400 --> 00:29:00,430
Se konsa, rezon ki fè yo ou jwenn ka youn nan
sèlman ekri an lèt detache ba se paske mwen

533
00:29:00,430 --> 00:29:01,890
gen sa a ti repo isit la.

534
00:29:01,890 --> 00:29:05,360
Si m ', di, inyore break-- sa a
si mwen jete breakaway-- sa a

535
00:29:05,360 --> 00:29:09,740
li ta ekri ak lèt ​​detache ba, ak Lè sa a, li ta
enprime mwayen, ak Lè sa a, li ta kraze.

536
00:29:09,740 --> 00:29:12,200
>> Se konsa, repo se yon pati enpòtan
nan chanje kondisyon ak

537
00:29:12,200 --> 00:29:14,340
yo ta dwe gen.

538
00:29:14,340 --> 00:29:20,070
Nenpòt ka ki pa te deklare klèman
yo okipe pa default a

539
00:29:20,070 --> 00:29:26,645
ta dwe ka nan switch la yo epi yo dwe jete.

540
00:29:26,645 --> 00:29:31,363
>> ODYANS: Se konsa 1, 2, 3,
ak 4 ta dwe n?

541
00:29:31,363 --> 00:29:33,310
>> DAN: Valè ki n kapab.

542
00:29:33,310 --> 00:29:34,654
Wi.

543
00:29:34,654 --> 00:29:35,146
Yeah?

544
00:29:35,146 --> 00:29:37,606
>> ODYANS: Se konsa lè ou gen
ki [fèbl]?

545
00:29:37,606 --> 00:29:44,002

546
00:29:44,002 --> 00:29:46,830
>> DAN: Ou ta enprime ba, ak Lè sa a,
li ta ekri ak lèt ​​detache mwayen, ak

547
00:29:46,830 --> 00:29:47,400
Lè sa a, li ta kraze.

548
00:29:47,400 --> 00:29:50,244
>> ODYANS: Poukisa ta li enprime
mitan si [fèbl]?

549
00:29:50,244 --> 00:29:54,036

550
00:29:54,036 --> 00:30:00,550
>> DAN: Se konsa, tout bagay anba yon ka
anvan yon ti repo tonbe anba.

551
00:30:00,550 --> 00:30:09,390
Se konsa, ka yon sèl ekri an lèt detache se anba ka
yon sèl kòm se enprime sa a anba la a.

552
00:30:09,390 --> 00:30:09,890
Yeah?

553
00:30:09,890 --> 00:30:11,140
>> ODYANS: [fèbl]?

554
00:30:11,140 --> 00:30:15,890

555
00:30:15,890 --> 00:30:22,170
>> DAN: Se konsa, nimewo sa a se jis yon patikilye
valè varyab sa sa a

556
00:30:22,170 --> 00:30:23,420
ka pran, dwa?

557
00:30:23,420 --> 00:30:26,740

558
00:30:26,740 --> 00:30:28,490
ki fè sans?

559
00:30:28,490 --> 00:30:28,990
Yeah.

560
00:30:28,990 --> 00:30:31,490
>> ODYANS: [fèbl]?

561
00:30:31,490 --> 00:30:34,130
>> DAN: Wi, ka de ta enprime
mwayen ak Lè sa a, kraze.

562
00:30:34,130 --> 00:30:35,380
>> ODYANS: [fèbl]?

563
00:30:35,380 --> 00:30:37,954

564
00:30:37,954 --> 00:30:40,050
>> DAN: Mwen panse ke nenpòt ki?

565
00:30:40,050 --> 00:30:43,855
Ki kalite done lòt
ou ka chanje sou?

566
00:30:43,855 --> 00:30:46,320
>> ODYANS: Ou ka chanje
sou nenpòt ki kalite done.

567
00:30:46,320 --> 00:30:50,905
Men, li sèlman vle di anyen sou char
ak antye ak lòt bagay tankou sa, paske

568
00:30:50,905 --> 00:30:55,600
si w ap oblije chanje sou yon konsèy
ki pa vrèman fè sans,

569
00:30:55,600 --> 00:30:59,555
oblije chanje sou charj, si li menm kite nan
ou fè sa, paske nan pwen k ap flote

570
00:30:59,555 --> 00:31:02,840
nan presizyon, ou ta pa reyèlman
vle fè sa de tout fason.

571
00:31:02,840 --> 00:31:07,320
Se konsa, bèl anpil, jis antye ak
charaktèr ak lòt bagay tankou sa.

572
00:31:07,320 --> 00:31:12,360
>> DAN: Yeah, li nan lè ou gen eksplisit
valè ke ou konnen, mwen panse, kapab

573
00:31:12,360 --> 00:31:14,250
ki yon switch se aktyèlman itil.

574
00:31:14,250 --> 00:31:17,094

575
00:31:17,094 --> 00:31:18,990
Bon?

576
00:31:18,990 --> 00:31:21,370
OK.

577
00:31:21,370 --> 00:31:26,180
>> Dimansyon se ranje a ke yon te deklare
varyab fin.

578
00:31:26,180 --> 00:31:32,190
Se konsa, nan sa a ti moso ti kras nan Kòd mwen gen,
li ta plen nan erè.

579
00:31:32,190 --> 00:31:41,450
Ak rezon an se mwen te deklare Int sa a
mwen nan sijè ki abòde lan nan sa a pou riban.

580
00:31:41,450 --> 00:31:46,390
Lè sa a, mwen ap eseye referans ki
mwen deyò nan ke pou sijè ki abòde bouk.

581
00:31:46,390 --> 00:31:50,330
>> Se konsa, fondamantalman, ou ka panse sou sijè ki abòde
kòm nenpòt ki bagay ki ou deklare

582
00:31:50,330 --> 00:31:59,750
ak andedan yon seri aparèy òtopedik Curly sèlman
egziste nan sa yo aparèy òtopedik Curly.

583
00:31:59,750 --> 00:32:04,990
Men, si ou eseye epi sèvi ak varyab sa
deyò nan sa yo aparèy òtopedik Curly, ou pral

584
00:32:04,990 --> 00:32:08,356
jwenn yon erè soti nan du a.

585
00:32:08,356 --> 00:32:08,812
Yeah?

586
00:32:08,812 --> 00:32:09,724
>> ODYANS: Se konsa yon sèl sa a pa travay?

587
00:32:09,724 --> 00:32:11,790
>> DAN: Sa a pa travay, wi.

588
00:32:11,790 --> 00:32:17,190

589
00:32:17,190 --> 00:32:18,660
Strings.

590
00:32:18,660 --> 00:32:19,780
Fisèl yon * Char.

591
00:32:19,780 --> 00:32:22,250
Yo ap ekzakteman menm bagay la.

592
00:32:22,250 --> 00:32:25,540
Yo yo se jis endikasyon nan karaktè.

593
00:32:25,540 --> 00:32:33,000
Ak nenpòt ki strings ke ou gen ta dwe fini
ak zewo antislach, ki se jis

594
00:32:33,000 --> 00:32:34,410
yon konvansyon c.

595
00:32:34,410 --> 00:32:36,680
>> Se sa yo rele Terminator a nil.

596
00:32:36,680 --> 00:32:39,050
Epi null--

597
00:32:39,050 --> 00:32:41,670
kapital N, kapital U, kapital
L, kapital L--

598
00:32:41,670 --> 00:32:44,290
se pa menm bagay la kòm nan
Nil Terminator.

599
00:32:44,290 --> 00:32:46,640
Sa a se yon konsèy.

600
00:32:46,640 --> 00:32:48,280
Sa a se yon karaktè.

601
00:32:48,280 --> 00:32:49,530
Yo se trè diferan.

602
00:32:49,530 --> 00:32:50,200
Sonje li.

603
00:32:50,200 --> 00:32:52,320
Li pral sou egzamen an, pwobableman.

604
00:32:52,320 --> 00:32:54,040
Mwen pa te wè egzamen an.

605
00:32:54,040 --> 00:32:57,880

606
00:32:57,880 --> 00:32:58,840
Yeah?

607
00:32:58,840 --> 00:33:01,232
>> ODYANS: Se konsa nil se, di, konsèy la?

608
00:33:01,232 --> 00:33:01,995
>> DAN: Wi.

609
00:33:01,995 --> 00:33:05,170
>> ODYANS: Ki sa [fèbl]?

610
00:33:05,170 --> 00:33:10,050
>> DAN: Si, di, malok yo rele lè ou
pa gen ase memwa yo ka resevwa

611
00:33:10,050 --> 00:33:14,400
kèlkeswa gwosè ou ap mande pou,
malok ap retounen nil.

612
00:33:14,400 --> 00:33:19,550
Li nan, fondamantalman, chak fwa yon fonksyon se
sipoze retounen yon konsèy, ou

613
00:33:19,550 --> 00:33:22,600
bezwen yo tcheke kont nil paske
Nil se yon good-- trè

614
00:33:22,600 --> 00:33:25,260
li a, sòt de, valè a fatra.

615
00:33:25,260 --> 00:33:27,050
Li se yon zewo osi lwen ke endikasyon ale.

616
00:33:27,050 --> 00:33:29,630

617
00:33:29,630 --> 00:33:32,250
>> Chak fwa ou rele yon fonksyon,
ki retounen yon konsèy.

618
00:33:32,250 --> 00:33:35,960
W ap ale nan vle tcheke yo dwe
asire w ke ki konsèy se pa nil

619
00:33:35,960 --> 00:33:37,760
paske nil se trè komen.

620
00:33:37,760 --> 00:33:40,160
Li nan sòt de yon retou fatra.

621
00:33:40,160 --> 00:33:44,902
Se konsa, si yon bagay pa t 'ale dwa,
jis retounen nil pito.

622
00:33:44,902 --> 00:33:45,898
>> ODYANS: [fèbl]?

623
00:33:45,898 --> 00:33:48,922
>> DAN: Wi, epi ki nan sa a.

624
00:33:48,922 --> 00:33:51,750
>> ODYANS: [fèbl]?

625
00:33:51,750 --> 00:33:52,800
>> DAN: korektè li kòm sa a.

626
00:33:52,800 --> 00:33:54,150
Li nan Terminator a nil.

627
00:33:54,150 --> 00:33:56,560
Li nan miniskil N-U-L-L si
w ap òtograf li.

628
00:33:56,560 --> 00:33:59,860
>> ODYANS: Apre sa, mwen jis te ale
retounen lakay yo epi teste li.

629
00:33:59,860 --> 00:34:03,010
Men, si ou eseye mete yon pwen k ap flote
valè nan yon switch, li pral rele nan ou

630
00:34:03,010 --> 00:34:05,916
li di, deklarasyon mande pou ekspresyon
nan kalite nonb antye relatif.

631
00:34:05,916 --> 00:34:07,166
>> DAN: Gen ou ale.

632
00:34:07,166 --> 00:34:09,639

633
00:34:09,639 --> 00:34:12,246
Men, yeah, sa ki te kesyon an ankò?

634
00:34:12,246 --> 00:34:13,496
>> ODYANS: [fèbl]?

635
00:34:13,496 --> 00:34:16,150

636
00:34:16,150 --> 00:34:23,679
>> DAN: Se konsa, kapital N, kapital U, kapital
L, kapital L se yon bagay c vrè.

637
00:34:23,679 --> 00:34:29,719
Li se konsèy la nil epi yo pral
sèlman dwe trete kòm sa yo.

638
00:34:29,719 --> 00:34:33,530
Ou pa pral tout tan tout tan eseye ak eple a
Karaktè nil epi wè nenpòt ki

639
00:34:33,530 --> 00:34:35,630
lòt fason pase sa.

640
00:34:35,630 --> 00:34:36,610
Yeah?

641
00:34:36,610 --> 00:34:42,490
>> ODYANS: Se konsa retounen nan Char max oswa
yon bagay nan nòt yo, ta li

642
00:34:42,490 --> 00:34:43,960
enkòpore fonksyon an menm
kòm [fèbl]?

643
00:34:43,960 --> 00:34:50,655

644
00:34:50,655 --> 00:34:54,949
>> ODYANS: Se konsa w'ap refere li a
retounen Char max soti nan getchar, oswa

645
00:34:54,949 --> 00:34:55,444
tou sa li se?

646
00:34:55,444 --> 00:34:55,940
>> ODYANS: Yeah.

647
00:34:55,940 --> 00:34:58,620
>> ODYANS: Yeah, se konsa jeneral la
tèm pou tout bagay sa yo

648
00:34:58,620 --> 00:34:59,920
yo Sentinel valè.

649
00:34:59,920 --> 00:35:03,640
Se konsa, tankou retounen Int max soti nan GetInt
ak Char max soti nan getchar, li nan

650
00:35:03,640 --> 00:35:06,010
sipoze tankou, tout dwa, si
bagay sa yo ap retounen nan nou,

651
00:35:06,010 --> 00:35:07,210
yon bagay ale mal.

652
00:35:07,210 --> 00:35:09,950
>> Pou endikasyon, nou jis rive gen
valè Sentinel sa a ke tout moun

653
00:35:09,950 --> 00:35:10,750
dakò sou li.

654
00:35:10,750 --> 00:35:13,210
Lè sa a se bagay la ou retounen
lè bagay sa yo ale mal.

655
00:35:13,210 --> 00:35:15,910
Se konsa, Char max se sa ki nou ap sèvi ak
reprezante yon bagay

656
00:35:15,910 --> 00:35:18,100
tankou nil oswa getchar.

657
00:35:18,100 --> 00:35:23,420
>> ODYANS: Se konsa, si w ap fè tès getchar,
te kapab ou jis mete nil?

658
00:35:23,420 --> 00:35:23,910
Ta ki fè yon diferans?

659
00:35:23,910 --> 00:35:25,400
>> DAN: Ou pa t 'kapab jis tcheke nil.

660
00:35:25,400 --> 00:35:30,130
Ou ta gen yo tcheke Char max paske nan
valè retounen soti nan fonksyon an se

661
00:35:30,130 --> 00:35:35,416
yon karaktè pa yon konsèy.

662
00:35:35,416 --> 00:35:35,888
Yeah?

663
00:35:35,888 --> 00:35:38,248
>> ODYANS: Kesyon sa a mande
pou longè a fisèl.

664
00:35:38,248 --> 00:35:40,136
Èske ki gen ladan yo pèsonaj la nil?

665
00:35:40,136 --> 00:35:41,000
>> DAN: No

666
00:35:41,000 --> 00:35:45,930
Epi sa a, aktyèlman ki jan longè fil
konnen yo sispann paske li ale nan

667
00:35:45,930 --> 00:35:49,070
etalaj ou nan karaktè jiskaske
li wè yon karaktè nil.

668
00:35:49,070 --> 00:35:51,030
Lè sa a, li la tankou, tout
dwat, mwen fè.

669
00:35:51,030 --> 00:35:52,130
>> ODYANS: [fèbl] senk?

670
00:35:52,130 --> 00:35:53,990
>> DAN: Hello ta dwe senk.

671
00:35:53,990 --> 00:35:55,240
Oui.

672
00:35:55,240 --> 00:35:59,580

673
00:35:59,580 --> 00:36:02,880
Se konsa, ranje yo se kontinyèl
blòk nan memwa.

674
00:36:02,880 --> 00:36:08,480
Yo gen aksè enstantane lè li di nan
non nan etalaj la ak Lè sa a, nan Curly

675
00:36:08,480 --> 00:36:16,720
aparèy òtopedik, kèlkeswa sa endèks ou vle ale
, yo ap Catalogue soti nan zewo a

676
00:36:16,720 --> 00:36:20,100
longè a nan etalaj la mwens 1.

677
00:36:20,100 --> 00:36:23,070
>> Apre sa, yo ap deklare pa kalite a nan la
bagay ke ou ap estoke nan la

678
00:36:23,070 --> 00:36:29,750
etalaj, non an nan etalaj la, ak Lè sa a,
tou sa gwosè a se nan ki etalaj.

679
00:36:29,750 --> 00:36:36,660
Se konsa, sa a se yon etalaj Char nan longè
sis ki gen valè sa yo.

680
00:36:36,660 --> 00:36:42,050

681
00:36:42,050 --> 00:36:42,700
Yeah?

682
00:36:42,700 --> 00:36:43,950
>> ODYANS: [fèbl]?

683
00:36:43,950 --> 00:36:47,980

684
00:36:47,980 --> 00:36:48,460
>> DAN: Yeah.

685
00:36:48,460 --> 00:36:51,340
>> ODYANS: [fèbl]?

686
00:36:51,340 --> 00:36:56,700
>> DAN: Si ou gen ki sa ki pwal
nan etalaj la deja fè fè yo.

687
00:36:56,700 --> 00:37:02,260
Se konsa, ou ta ka presize sa a olye ke,
di, Char, kèlkeswa sa non an nan ou

688
00:37:02,260 --> 00:37:12,200
etalaj se, parantèz vid egal Curly
mete sipò H vigil E vigil L vigil L vigil

689
00:37:12,200 --> 00:37:16,290
O vigil karaktè nil
ak Curly atèl.

690
00:37:16,290 --> 00:37:18,180
Ki ta ka travay tou kòm yon deklarasyon.

691
00:37:18,180 --> 00:37:20,886
>> ODYANS: [fèbl]?

692
00:37:20,886 --> 00:37:23,110
>> DAN: Lè sa a, ou bezwen gen
gwosè a deja fè fè yo.

693
00:37:23,110 --> 00:37:23,896
>> ODYANS: [fèbl]?

694
00:37:23,896 --> 00:37:25,146
>> DAN: Wi.

695
00:37:25,146 --> 00:37:30,114

696
00:37:30,114 --> 00:37:32,420
Tout righty.

697
00:37:32,420 --> 00:37:36,430
Agiman liy lòd yo se yon fason a
ap resevwa enfòmasyon nan men gwoup itilizatè a kòm

698
00:37:36,430 --> 00:37:39,380
agiman prensipal la.

699
00:37:39,380 --> 00:37:40,600
Main pran de agiman.

700
00:37:40,600 --> 00:37:47,680
Nimewo a nan agiman ki se ke yo te
pase sou liy lan bay lòd ak yon

701
00:37:47,680 --> 00:37:55,340
vektè fisèl oswa yon etalaj fisèl
nan tout nan agiman yo.

702
00:37:55,340 --> 00:38:07,840
>> Se konsa, si mwen, di, rele yon fonksyon tankou
yon dot soti 1 espas, 2 espas, twa,

703
00:38:07,840 --> 00:38:10,110
arg ta dwe 4.

704
00:38:10,110 --> 00:38:17,370
Ak argv 0 la ta dwe yon dot deyò.

705
00:38:17,370 --> 00:38:19,130
Argv1 ta dwe 1.

706
00:38:19,130 --> 00:38:23,030
argv2 ta dwe 2. argv3 ta dwe
3, nan ka sa a an patikilye.

707
00:38:23,030 --> 00:38:23,310
Yeah?

708
00:38:23,310 --> 00:38:25,400
>> ODYANS: [fèbl]?

709
00:38:25,400 --> 00:38:34,010
>> DAN: Se eleman ki sot pase a nan etalaj la
paske etalaj la se longè arg plis

710
00:38:34,010 --> 00:38:41,050
youn nan argb, eleman ki sot pase a
se konsèy la nil.

711
00:38:41,050 --> 00:38:42,580
Li se arg plis 1.

712
00:38:42,580 --> 00:38:46,210

713
00:38:46,210 --> 00:38:52,150
Se konsa, nan ka a ke mwen jis te di, li
ta dwe argv 0 se yon dot deyò.

714
00:38:52,150 --> 00:38:56,330
argv 1 se 1. argv2 se 2. argv 3 se 3.

715
00:38:56,330 --> 00:39:03,490
argv 4, ki se youn pi gwo
pase arg ta dwe nil.

716
00:39:03,490 --> 00:39:04,870
>> Epi sa a, konsèy la nil.

717
00:39:04,870 --> 00:39:06,590
Wi.

718
00:39:06,590 --> 00:39:11,250
Epi sa a, paske fisèl se
yon etwal Char se yon konsèy.

719
00:39:11,250 --> 00:39:14,102
Se konsa, li te gen kalite a menm.

720
00:39:14,102 --> 00:39:14,595
Yeah?

721
00:39:14,595 --> 00:39:16,074
>> ODYANS: De kesyon.

722
00:39:16,074 --> 00:39:21,004
Se konsa, yon sèl, sa ki nan diferans ki genyen ant
sa a epi GetString lòt pase yon sèl kalite

723
00:39:21,004 --> 00:39:22,483
nan motè a itilizatè?

724
00:39:22,483 --> 00:39:25,934
Ak de, se li ki estoke nan
memwa ki sot pase ou a?

725
00:39:25,934 --> 00:39:28,399
Se konsa, tankou, GetString ta
gen [fèbl]?

726
00:39:28,399 --> 00:39:31,357

727
00:39:31,357 --> 00:39:33,650
>> DAN: Ki kote li ki estoke?

728
00:39:33,650 --> 00:39:34,905
Mwen pa konnen ki kote li a ki estoke.

729
00:39:34,905 --> 00:39:40,000
>> ODYANS: Se konsa, aktyèlman, ou konnen ki jan nenpòt ki
fonksyone ou rele li nan agiman

730
00:39:40,000 --> 00:39:42,170
yo estoke nan chemine a?

731
00:39:42,170 --> 00:39:46,610
Se konsa, arg ak argv yo se agiman prensipal
ak yo sou chemine a, oswa reyèlman

732
00:39:46,610 --> 00:39:49,131
jis anwo a ki sa ou panse kòm
nan kòmansman an nan chemine a.

733
00:39:49,131 --> 00:39:53,490
Ki sa ki te pati nan lòt
nan kesyon an?

734
00:39:53,490 --> 00:39:56,821
>> ODYANS: Se konsa sa ki nan [fèbl la]?

735
00:39:56,821 --> 00:40:00,990
>> DAN: Yeah, li nan jis yon fason diferan
nan ap resevwa enfòmasyon nan men gwoup itilizatè a.

736
00:40:00,990 --> 00:40:06,030
Sa a yon sèl nan yon ti kras pi efikas ak
li nan handier pou Scripts paske ou

737
00:40:06,030 --> 00:40:10,070
ka jis pase agiman prensipal ou
fonksyon olye ke gen yo rete tann

738
00:40:10,070 --> 00:40:13,400
pou itilizatè si ou pa gen okenn itilizatè.

739
00:40:13,400 --> 00:40:16,280
>> ODYANS: Lè yeah, jwenn strings
ta dwe [fèbl].

740
00:40:16,280 --> 00:40:17,922
Li ta magazen bagay la ou bezwen.

741
00:40:17,922 --> 00:40:18,834
>> DAN: Yeah?

742
00:40:18,834 --> 00:40:21,114
>> ODYANS: [fèbl]?

743
00:40:21,114 --> 00:40:27,545
>> DAN: Wi, argv 0 toujou gen ladan nan
dot koupe nan apèl la fonksyon.

744
00:40:27,545 --> 00:40:28,042
Yeah?

745
00:40:28,042 --> 00:40:29,292
>> ODYANS: [fèbl]?

746
00:40:29,292 --> 00:40:33,509

747
00:40:33,509 --> 00:40:37,310
>> DAN: Wi, chak nan agiman yo se
te fini nan karaktè nil paske yo

748
00:40:37,310 --> 00:40:38,310
yo strings.

749
00:40:38,310 --> 00:40:40,892
>> ODYANS: [fèbl]?

750
00:40:40,892 --> 00:40:44,116
>> DAN: Wi, argv arg se yon konsèy nil.

751
00:40:44,116 --> 00:40:45,112
>> ODYANS: [fèbl]?

752
00:40:45,112 --> 00:40:47,104
>> DAN: Oh yeah.

753
00:40:47,104 --> 00:40:48,100
Yeah, regrèt.

754
00:40:48,100 --> 00:40:49,594
>> ODYANS: Se konsa [fèbl]?

755
00:40:49,594 --> 00:41:08,518

756
00:41:08,518 --> 00:41:16,340
>> DAN: Se konsa, kesyon an se si ou te gen an
liy lòd dot koupe yon dot soti 1, 2,

757
00:41:16,340 --> 00:41:20,410
ta ki kantite liy lòd
agiman gen de oswa li ta dwe twa?

758
00:41:20,410 --> 00:41:24,420

759
00:41:24,420 --> 00:41:28,240
>> ODYANS: Mwen panse ke li fè sa ki pa
reyèlman gen pwoblèm.

760
00:41:28,240 --> 00:41:31,370
Mwen gen tandans di, o, ou pa t 'pase
nenpòt agiman liy lòd lè,

761
00:41:31,370 --> 00:41:32,730
evidamman, ou rele fonksyon an.

762
00:41:32,730 --> 00:41:37,950
Se konsa, mwen gen tandans yo awotvwa eskli nan
fonksyon nan liy la lòd

763
00:41:37,950 --> 00:41:40,350
agiman menm si li nan
enkli nan argv.

764
00:41:40,350 --> 00:41:42,600
>> DAN: Men, si li te sou test-- la

765
00:41:42,600 --> 00:41:46,550
yeah-- epi tou si ou di yon bagay
tankou arg egal 3,

766
00:41:46,550 --> 00:41:48,512
w ap nan kanpe san danje.

767
00:41:48,512 --> 00:41:49,416
Yeah?

768
00:41:49,416 --> 00:41:50,666
>> ODYANS: [fèbl]?

769
00:41:50,666 --> 00:42:00,990

770
00:42:00,990 --> 00:42:09,510
>> DAN: Mwen panse ke si olye pou yo rele sa a
nan arg ak fisèl parantèz argv

771
00:42:09,510 --> 00:42:14,350
men kenbe kalite yo menm ak jis rele
yo yon bagay diferan tankou yon

772
00:42:14,350 --> 00:42:16,640
ak b, ta li toujou ap travay?

773
00:42:16,640 --> 00:42:18,790
Epi li ta toujou travay,
ou ta just--

774
00:42:18,790 --> 00:42:21,520
olye pou yo lè l sèvi avèk argc--
ou ta sèvi ak yon ak b.

775
00:42:21,520 --> 00:42:24,436

776
00:42:24,436 --> 00:42:25,408
Yeah?

777
00:42:25,408 --> 00:42:26,658
>> ODYANS: [fèbl]?

778
00:42:26,658 --> 00:42:34,642

779
00:42:34,642 --> 00:42:38,850
>> DAN: Se konsa, kesyon an se GetString se
pral nan magazen memwa nan pil wòch la

780
00:42:38,850 --> 00:42:42,280
paske GetString se * Char.

781
00:42:42,280 --> 00:42:47,530
Li estoke memwa nan pil wòch la paske li
rele kounye a malok ki nan aktyèl la

782
00:42:47,530 --> 00:42:49,258
aplikasyon nan GetString.

783
00:42:49,258 --> 00:42:53,210

784
00:42:53,210 --> 00:42:55,090
OK, deplase sou.

785
00:42:55,090 --> 00:42:55,950
>> Sekirite Sosyal.

786
00:42:55,950 --> 00:43:01,090
Se konsa, yo dwe vrèman an sekirite, ou konte sou pa gen okenn
yon sèl ak ou pèmèt pa gen yon aksè a nenpòt ki

787
00:43:01,090 --> 00:43:04,540
nan enfòmasyon ou, ki se poukisa
tout moun ap bati machin pwòp yo,

788
00:43:04,540 --> 00:43:09,580
pwòp sistèm fonksyònman yo, tout yo
pwogram nan grate, e evidameman

789
00:43:09,580 --> 00:43:13,410
pa konekte nan nenpòt lòt machin
atravè entènèt la.

790
00:43:13,410 --> 00:43:17,350
Se konsa, òdinatè yo sekirite.

791
00:43:17,350 --> 00:43:19,200
Yo te reyèlman yo ye.

792
00:43:19,200 --> 00:43:20,940
Nou gen gen konfyans nan lòt moun.

793
00:43:20,940 --> 00:43:26,500
>> Ak lide a nan sekirite se ke w ap
ap eseye limite kantite lajan an nan

794
00:43:26,500 --> 00:43:27,540
konfyans ke ou bezwen.

795
00:43:27,540 --> 00:43:32,080
Ak youn nan vle di yo ou fè sa
se nan chifreman.

796
00:43:32,080 --> 00:43:34,950
Chifreman se, esansyèlman,
nou gen sekrè.

797
00:43:34,950 --> 00:43:38,880
>> Pafwa nou gen yo pase sekrè nou an
ansanm nan, di, entènèt la oswa

798
00:43:38,880 --> 00:43:39,980
lòt bagay.

799
00:43:39,980 --> 00:43:43,180
Epi nou pa vle moun
yo konnen sekrè sa yo.

800
00:43:43,180 --> 00:43:50,100
Se konsa, nou ankripte sekrè nou an, nan yon fason
ke nou espere pesonn pa ka konnen.

801
00:43:50,100 --> 00:43:51,600
>> Se konsa, nou used--

802
00:43:51,600 --> 00:43:54,340
nan kou a nan class-- sa a

803
00:43:54,340 --> 00:44:00,750
bagay sa yo tankou Seza tande kòz kalkile ak
[Fèbl] yo, ki se tou de trè, trè

804
00:44:00,750 --> 00:44:03,200
fason anksyeu nan chifreman bagay sa yo.

805
00:44:03,200 --> 00:44:07,930
Yo ap fasil figi konnen kisa yo
ye epi ki sa sekrè ou yo.

806
00:44:07,930 --> 00:44:12,130
Mond reyèl la sèvi ak pi plis
konplike chifreman rapid.

807
00:44:12,130 --> 00:44:13,880
Epi nou pa pral jwenn nan
pi plis pase sa.

808
00:44:13,880 --> 00:44:18,280

809
00:44:18,280 --> 00:44:19,430
>> Debogaj.

810
00:44:19,430 --> 00:44:20,785
Gdb ki pi bon an.

811
00:44:20,785 --> 00:44:24,014

812
00:44:24,014 --> 00:44:25,810
Mwen pral estrès sa a ankò.

813
00:44:25,810 --> 00:44:30,920
Sèvi ak gdb tout tan tout tan an chak
tan ou gen yon pwoblèm.

814
00:44:30,920 --> 00:44:36,030
Kòmandman ki yo itil yo nan gdb yo
kraze, kote ou pase swa yon liy

815
00:44:36,030 --> 00:44:41,330
nimewo, yon non fonksyon, esansyèlman
ki kote nan kòd ou a ou vle yo sispann,

816
00:44:41,330 --> 00:44:45,600
epi yo dwe kapab pran kontwòl.

817
00:44:45,600 --> 00:44:54,140
>> Ekri an lèt detache pran yon varyab ak simagri soti
kèlkeswa sa ki varyab se nan ki

818
00:44:54,140 --> 00:44:55,990
pwen nan ekzekisyon ou.

819
00:44:55,990 --> 00:45:00,130
Next deplase ekzekisyon ou
ansanm yon sèl etap.

820
00:45:00,130 --> 00:45:05,050
Ak etap etap andedan yon fonksyon
nan ekzekisyon ou.

821
00:45:05,050 --> 00:45:10,480
>> Lòt bagay yo ap kouri, ki se ki jan
ou aktyèlman kouri kòd ou a.

822
00:45:10,480 --> 00:45:16,630
Kontinye pran tout etap ki nesesè
pou li ale nan pwen an repo vini an.

823
00:45:16,630 --> 00:45:18,300
E gen anpil moun, anpil lòt moun.

824
00:45:18,300 --> 00:45:19,040
Gade yo moute.

825
00:45:19,040 --> 00:45:19,901
Yo ap gwo.

826
00:45:19,901 --> 00:45:20,863
Yeah?

827
00:45:20,863 --> 00:45:22,113
>> ODYANS: [fèbl]?

828
00:45:22,113 --> 00:45:26,635

829
00:45:26,635 --> 00:45:28,200
>> DAN: Wi, ki se yon debugjeur.

830
00:45:28,200 --> 00:45:34,230
Se konsa, yon debugjeur se yon pwogram ki
pèmèt ou debug pwogram ou an.

831
00:45:34,230 --> 00:45:39,931
Li pa yon pwogram ki jwenn pinèz pou
ou, menm si ke ta gen gwo pouvwa.

832
00:45:39,931 --> 00:45:43,020

833
00:45:43,020 --> 00:45:46,040
>> Ak dènye pou m 'se rechèch.

834
00:45:46,040 --> 00:45:51,470
Se konsa, ki kalite rechèch ke nou te pale
sou nan klas sa a yo se rechèch lineyè,

835
00:45:51,470 --> 00:45:55,960
ki se jis ke ou gade nan chak
eleman nan espas ki la rechèch, youn

836
00:45:55,960 --> 00:46:00,410
eleman nan yon moman, jiskaske ou jwenn sa
w ap chèche pou oswa jiskaske ou rive nan

837
00:46:00,410 --> 00:46:03,350
nan fen espas rechèch ou an nan ki
pwen ou di ke ou pa t 'kapab jwenn

838
00:46:03,350 --> 00:46:06,360
eleman nan ke ou te kap chèche.

839
00:46:06,360 --> 00:46:13,450
Lè sa a pran tan nan pi bon konstan,
ki se 0 a 1 ak nan pi move lineyè

840
00:46:13,450 --> 00:46:16,070
tan, ki se 0 n.

841
00:46:16,070 --> 00:46:19,250
>> Rechèch binè, ki bezwen
eleman miserable.

842
00:46:19,250 --> 00:46:24,230
Ou ale nan mitan an nan eleman ou,
wè si eleman nan w ap chèche pou

843
00:46:24,230 --> 00:46:30,120
se pi gwo oswa pi piti pase eleman nan
ke w ap nan mitan yo.

844
00:46:30,120 --> 00:46:36,510
Li li nan pi gwo, ou di ke anba a
nan rechèch ou an espas se ou

845
00:46:36,510 --> 00:46:41,550
kote kounye a, mitan an,
epi ou rekòmanse pwosesis la.

846
00:46:41,550 --> 00:46:46,150
Si li nan pi piti, ou gade di
ki the-- yeah, sa ki nan moute?

847
00:46:46,150 --> 00:46:47,400
>> ODYANS: [fèbl]?

848
00:46:47,400 --> 00:46:51,000

849
00:46:51,000 --> 00:46:54,260
>> DAN: Wi.

850
00:46:54,260 --> 00:46:58,360
Nenpòt ki sòt de sòt sa a te anseye nan
klas la se jis jwèt pou tès la.

851
00:46:58,360 --> 00:47:01,504

852
00:47:01,504 --> 00:47:04,920
>> [Ri]

853
00:47:04,920 --> 00:47:10,260
>> DAN: Ak lefèt ke ou pa te gen
fè li pou yon seri pwoblèm, li nan jis

854
00:47:10,260 --> 00:47:12,420
jwèt pou tès la.

855
00:47:12,420 --> 00:47:15,186
>> ODYANS: Èske nou ka ale sou li ki jan to--

856
00:47:15,186 --> 00:47:17,052
>> DAN: Li pral fè wout sou.

857
00:47:17,052 --> 00:47:20,496
>> Oratè 2: Kòd aktyèl la pou
[Fèbl] se sou study.cs50.net.

858
00:47:20,496 --> 00:47:25,910

859
00:47:25,910 --> 00:47:32,680
Se konsa, si ou gade nan pwoblèm nan pratik
nan paj la rantre sòt de

860
00:47:32,680 --> 00:47:35,880
study.cs50.net, gen se kòd la
pou mete ann aplikasyon rantre sòt.

861
00:47:35,880 --> 00:47:38,550
Se konsa, ou pa bezwen aplike
li tèt ou aswè a.

862
00:47:38,550 --> 00:47:42,090
Men, asire w ke ou konprann li olye
pase jis memorize li.

863
00:47:42,090 --> 00:47:45,035
>> ODYANS: [fèbl]?

864
00:47:45,035 --> 00:47:49,720
>> Oratè 2: paj la rantre sòt sou
study.cs50.net, gen se yon pratik

865
00:47:49,720 --> 00:47:53,570
pwoblèm ki, si ou klike sou atravè nan
pwoblèm, nan fen a trè gen yon

866
00:47:53,570 --> 00:47:56,280
solisyon, ki se rantre nan
sòt aplikasyon.

867
00:47:56,280 --> 00:47:58,510
Men, asire w ke ou konprann li
olye ke sèlman memorize li

868
00:47:58,510 --> 00:47:59,760
oswa kopye li desann.

869
00:47:59,760 --> 00:48:02,870

870
00:48:02,870 --> 00:48:06,340
>> ODYANS: Ak yon parfe ki valab
pwoblèm pou egzamen an ta dwe

871
00:48:06,340 --> 00:48:07,990
yon bagay tankou isit la nan yon lis.

872
00:48:07,990 --> 00:48:12,100
Ki lis sa a gade tankou apre
yon sèl etap nan seleksyon sòt oswa

873
00:48:12,100 --> 00:48:13,330
sòt ensèsyon oswa kèlkeswa sa.

874
00:48:13,330 --> 00:48:14,940
Youn iteration plen nan lis la.

875
00:48:14,940 --> 00:48:18,530
Se konsa, menm si ou pa fini ki bezwen
Kòd pou li, ou bezwen yo konprann li

876
00:48:18,530 --> 00:48:20,440
ase yo konnen ki jan li k ap pase
yo dwe modifye sa a etalaj.

877
00:48:20,440 --> 00:48:24,144

878
00:48:24,144 --> 00:48:25,394
>> DAN: Sa a li pou mwen.

879
00:48:25,394 --> 00:48:30,604

880
00:48:30,604 --> 00:48:32,588
>> [Aplodisman]

881
00:48:32,588 --> 00:49:06,316

882
00:49:06,316 --> 00:49:07,410
>> LUCAS: Hey tout moun.

883
00:49:07,410 --> 00:49:08,390
Non mwen se Lucas.

884
00:49:08,390 --> 00:49:16,840
Mwen pral pale sou rkursyon, tout
kalite sa yo ke nou te aprann, ak yon

885
00:49:16,840 --> 00:49:18,050
ti kras nan tout endikasyon.

886
00:49:18,050 --> 00:49:18,740
OK?

887
00:49:18,740 --> 00:49:20,340
Se konsa, premye nan tout, rkursyon.

888
00:49:20,340 --> 00:49:22,951
Kisa sa vle di yo di ke
yon fonksyon se repetitif?

889
00:49:22,951 --> 00:49:24,675
>> ODYANS: apèl tèt li.

890
00:49:24,675 --> 00:49:26,500
>> LUCAS: OK, rele tèt li, yeah.

891
00:49:26,500 --> 00:49:27,700
Se konsa, tankou foto sa a, pou egzanp.

892
00:49:27,700 --> 00:49:30,280
Se tankou foto a andedan
nan yon foto ak sou sa.

893
00:49:30,280 --> 00:49:35,740
Se konsa, pou egzanp, ou ka have-- kòm Dann
ki te pale sou rechèch binè.

894
00:49:35,740 --> 00:49:41,840
Yon fason rechèch binè se
repetitif se lefèt ke w ap

895
00:49:41,840 --> 00:49:43,130
ap eseye jwenn yon nimewo.

896
00:49:43,130 --> 00:49:44,250
Se konsa, ou ale nan mitan yo.

897
00:49:44,250 --> 00:49:47,130
Lè sa a, ou tcheke si nimewo yo gen
nan bò gòch la ak nan bò dwat la.

898
00:49:47,130 --> 00:49:49,650
>> Lè sa a, si ou jwenn soti nimewo a se
pral fè sou bò gòch la, li nan menm bagay la tou

899
00:49:49,650 --> 00:49:53,340
bagay tankou fè rechèch la ankò men
jis sou bò gòch la nan lis la.

900
00:49:53,340 --> 00:49:57,350
Se konsa, lè sa a jan li son
tankou li nan repetitif.

901
00:49:57,350 --> 00:50:01,870
Se konsa, Se poutèt sa ou nèg gen repetitif
solisyon pou rantre sòt.

902
00:50:01,870 --> 00:50:04,270
>> OK, se konsa isit la nan yon egzanp.

903
00:50:04,270 --> 00:50:07,280
Se konsa, kite a di ke mwen vle yo chwazi
tout nimewo yo nan 1 rive nan n.

904
00:50:07,280 --> 00:50:13,790
Mwen kapab reyalize ke sòm total la nan n nan
Nimewo se n plis n mwens 1 jiska 1.

905
00:50:13,790 --> 00:50:17,810
Men, lè sa a, si mwen gade nan n mwens 1 plis
n mwens 2 plis 1, sa a, se menm bagay la tou

906
00:50:17,810 --> 00:50:20,680
bagay tankou nimewo adisyon
jiska n mwens 1.

907
00:50:20,680 --> 00:50:25,890
Se konsa, mwen ka di sòm total la nan yon sòm egal
egal n plis sòm total la nan n mwens 1.

908
00:50:25,890 --> 00:50:28,010
ki fè sans?

909
00:50:28,010 --> 00:50:32,630
>> Apre sa, mwen tou ta gen yon lòt bagay
rele ka a baz, ki se ke

910
00:50:32,630 --> 00:50:37,440
sòm total la nan nimewo yo moute
a zewo ta dwe zewo.

911
00:50:37,440 --> 00:50:42,770
Se konsa, le pli vit ke mwen jwenn yo nimewo a
zewo, mwen sispann konte.

912
00:50:42,770 --> 00:50:45,330
ki fè sans?

913
00:50:45,330 --> 00:50:48,120
>> Se konsa, isit la nan yon egzanp sou kouman
Mwen ka aplike sa.

914
00:50:48,120 --> 00:50:49,860
Se konsa, mwen gen sa a fonksyon nan kèk.

915
00:50:49,860 --> 00:50:51,700
Ki pran yon n nonb antye relatif.

916
00:50:51,700 --> 00:50:56,300
Se konsa, isit la mwen premye tcheke si n se
mwens oswa egal a zewo.

917
00:50:56,300 --> 00:51:00,310
Se konsa, si li nan mwens oswa egal a zewo, mwen
retounen zewo, ki se ka baz nou an.

918
00:51:00,310 --> 00:51:05,690
Sinon, mwen ka jis retounen n plis
sòm total la nan nimewo ki soti nan

919
00:51:05,690 --> 00:51:07,190
youn nan yon sèl n mwens.

920
00:51:07,190 --> 00:51:09,360
Fè sans?

921
00:51:09,360 --> 00:51:10,100
OK.

922
00:51:10,100 --> 00:51:11,610
>> Se konsa, isit la nan sa li sanble.

923
00:51:11,610 --> 00:51:15,260
Ou gen sòm nan 2 egal
2 plis sòm total la nan 1.

924
00:51:15,260 --> 00:51:18,930
Ak kèk nan 1 se 1 plis nan
sòm de 0, ki se 0.

925
00:51:18,930 --> 00:51:20,216
Fè sans?

926
00:51:20,216 --> 00:51:25,342
Se konsa, si nou gade nan chemine a nan ou
pwogram nan, sa a se sa li sanble.

927
00:51:25,342 --> 00:51:26,820
>> Premyèman, nou gen fonksyon prensipal la.

928
00:51:26,820 --> 00:51:30,320
Lè sa a, fonksyon prensipal
rele sòm 2.

929
00:51:30,320 --> 00:51:36,690
Lè sa a, sòm 2 ki pral di, o, sòm
2 egal 2 plis sòm total la nan yon sèl.

930
00:51:36,690 --> 00:51:39,460
Se konsa, mwen ajoute sòm de 1 a chemine a.

931
00:51:39,460 --> 00:51:43,860
Ak sòm total la nan 1 ki pral rele sòm de
0, ki se tou ale nan dwe ajoute

932
00:51:43,860 --> 00:51:44,630
chemine a.

933
00:51:44,630 --> 00:51:49,240
Lè sa a, chak nan timoun sa yo ki
sou tèt yon lòt gen retounen

934
00:51:49,240 --> 00:51:52,020
anvan yo menm ki lòt ka kenbe prale.

935
00:51:52,020 --> 00:51:56,240
>> Se konsa, pou egzanp, isit la, sòm total de 0,
premye, ki pral retounen 0.

936
00:51:56,240 --> 00:51:58,320
Lè sa a, chwazi sòm nan 1.

937
00:51:58,320 --> 00:52:00,850
Lè sa a, sòm nan 1 ki pral
retounen 1 sòm nan 2.

938
00:52:00,850 --> 00:52:03,900
Epi finalman, sòm de 2 ki pral
retounen 3 a prensipal la.

939
00:52:03,900 --> 00:52:05,320
ki fè sans?

940
00:52:05,320 --> 00:52:09,496
>> Li nan reyèlman enpòtan ke ou konprann ki jan
chemine a ap travay epi eseye

941
00:52:09,496 --> 00:52:11,980
wè si li fè sans.

942
00:52:11,980 --> 00:52:13,260
OK, se konsa klasman.

943
00:52:13,260 --> 00:52:16,170
Se konsa, poukisa se Fouye enpòtan,
premye a tout?

944
00:52:16,170 --> 00:52:18,260
Poukisa nou ta dwe pran swen?

945
00:52:18,260 --> 00:52:20,310
Nenpòt moun ki?

946
00:52:20,310 --> 00:52:20,695
Ban m 'yon egzanp?

947
00:52:20,695 --> 00:52:21,040
Yeah?

948
00:52:21,040 --> 00:52:22,968
>> ODYANS: [fèbl].

949
00:52:22,968 --> 00:52:24,700
>> LUCAS: Yeah, OK.

950
00:52:24,700 --> 00:52:26,090
Se konsa, ou kapab fè rechèch pi plis efikasite.

951
00:52:26,090 --> 00:52:28,580
Sa a se yon bon fason.

952
00:52:28,580 --> 00:52:32,462
Se konsa, pou egzanp, nou gen yon anpil nan
bagay sa yo, aktyèlman, nan lavi nou ki

953
00:52:32,462 --> 00:52:32,920
yo Ranje.

954
00:52:32,920 --> 00:52:34,830
Pou egzanp, diksyonè.

955
00:52:34,830 --> 00:52:39,210
>> Li trè enpòtan ke ou gen nan tout
mo nan kèk kalite lòd ke nou

956
00:52:39,210 --> 00:52:41,970
kapab jwenn aksè nan fasil.

957
00:52:41,970 --> 00:52:43,280
Se konsa, se sa l 'te di.

958
00:52:43,280 --> 00:52:45,530
Ou kapab fè rechèch pi plis efikasite.

959
00:52:45,530 --> 00:52:48,740
Panse a ki jan difisil li ta dwe gen yon
diksyonè nan ki mo sa yo se nan

960
00:52:48,740 --> 00:52:49,500
lòd o aza.

961
00:52:49,500 --> 00:52:53,120
Ou ap gen fè yon gade nan, bèl anpil,
chak mo sèl jiskaske ou jwenn nan

962
00:52:53,120 --> 00:52:54,720
mo ke w ap chèche pou.

963
00:52:54,720 --> 00:52:58,710
>> Si w ap sèvi ak Facebook tou, lè
w ap chèche a zanmi ou, w ap

964
00:52:58,710 --> 00:53:03,540
ale nan wè ki Facebook mete ou
pi pre zanmi nan sou tèt nan yo menm ki

965
00:53:03,540 --> 00:53:05,470
ke ou pa pale ak ki anpil.

966
00:53:05,470 --> 00:53:08,080
Si ou ale tout wout la nan pati anba a nan
lis zanmi ou, w ap ale nan gade

967
00:53:08,080 --> 00:53:11,250
moun ki pwobableman ou pa fè sa menm
sonje ke w ap zanmi avèk yo.

968
00:53:11,250 --> 00:53:14,590
Epi sa a, paske Facebook kalite
zanmi ou ki baze sou ki jan

969
00:53:14,590 --> 00:53:16,472
fèmen ou se nan yo.

970
00:53:16,472 --> 00:53:17,930
>> Se konsa, òganize done.

971
00:53:17,930 --> 00:53:18,450
Epitou Pokemon.

972
00:53:18,450 --> 00:53:21,400
Se konsa, ou wè ke tout Pokemons
gen nimewo.

973
00:53:21,400 --> 00:53:27,210
Epi sa a, tankou yon fasil
fason pou gen aksè nan done.

974
00:53:27,210 --> 00:53:29,050
>> ODYANS: Antre nan Pokemon.

975
00:53:29,050 --> 00:53:29,890
>> LUCAS: Yeah.

976
00:53:29,890 --> 00:53:32,395
>> ODYANS: [fèbl].

977
00:53:32,395 --> 00:53:33,460
>> LUCAS: Yèp.

978
00:53:33,460 --> 00:53:35,140
OK, se konsa sòt seleksyon an.

979
00:53:35,140 --> 00:53:41,610
Seleksyon sòt ki pral chwazi a
pi piti valè triye nan yon lis chak

980
00:53:41,610 --> 00:53:43,300
tan nan chak iteration.

981
00:53:43,300 --> 00:53:46,800
Li nan kalite tankou sòt nan ke ou fè
nan tèt ou lè w ap eseye

982
00:53:46,800 --> 00:53:48,430
sòt yon lis nan men ou.

983
00:53:48,430 --> 00:53:51,990
>> Fondamantalman, tout sa ou fè se ou gade
pou yon nimewo pou ki pi piti a.

984
00:53:51,990 --> 00:53:54,280
Ou mete l 'nan lis la Ranje.

985
00:53:54,280 --> 00:53:56,230
Lè sa a, ou gade pou nan
pwochen pi piti kantite.

986
00:53:56,230 --> 00:54:00,080
Lè sa a, ou kontinye ap fè
ki ak sou sa.

987
00:54:00,080 --> 00:54:04,600
>> Se konsa, sòt seleksyon se fondamantalman ou
chwazi chak fwa pi piti a

988
00:54:04,600 --> 00:54:05,750
triye valè.

989
00:54:05,750 --> 00:54:10,840
Mete nan fen Ranje a
yon pati nan lis la.

990
00:54:10,840 --> 00:54:12,370
Epi kenbe fè sa.

991
00:54:12,370 --> 00:54:15,890
Se konsa, kite a byen vit wè sa ki
sa a sanble.

992
00:54:15,890 --> 00:54:19,340
Se konsa, isit la nan Ranje a
ak triye lis la.

993
00:54:19,340 --> 00:54:23,350
>> Se konsa, pou Ranje a nan lis,
li a okòmansman vid.

994
00:54:23,350 --> 00:54:26,760
Lè sa a, mwen pral chwazi a
pi piti nimewo isit la, ki se 2.

995
00:54:26,760 --> 00:54:30,650
Se konsa, mwen jwenn nimewo a 2 ak mwen mete
nan devan la nan lis la.

996
00:54:30,650 --> 00:54:34,910
Lè sa a, mwen gade pou pi piti nan pwochen
eleman, ki se 3.

997
00:54:34,910 --> 00:54:37,050
Se konsa, mwen mete l 'nan fen a
nan lis la Ranje.

998
00:54:37,050 --> 00:54:38,140
Lè sa a, mwen kontinye ap fè sa.

999
00:54:38,140 --> 00:54:40,040
Mwen jwenn 4 li mete l 'nan fen an.

1000
00:54:40,040 --> 00:54:41,360
Jwenn 5 li mete l 'nan fen an.

1001
00:54:41,360 --> 00:54:44,830
>> Ak gade nan ki jan tout moun sa yo fwa ke
M ap di mete l 'nan fen an se,

1002
00:54:44,830 --> 00:54:46,850
fondamantalman, échanjé de valè.

1003
00:54:46,850 --> 00:54:48,100
OK?

1004
00:54:48,100 --> 00:54:50,140

1005
00:54:50,140 --> 00:54:52,825
Lè sa a, dènye yon sèl la, ou jis
gen yon sèl eleman pi plis.

1006
00:54:52,825 --> 00:54:55,870
Se konsa, li deja klase.

1007
00:54:55,870 --> 00:54:57,800
>> OK, se konsa sòt ensèsyon.

1008
00:54:57,800 --> 00:55:03,180
Sòt ensèsyon w ap ale nan yo te genyen tou
ke bagay ki gen yon klase epi

1009
00:55:03,180 --> 00:55:04,690
yon lis triye.

1010
00:55:04,690 --> 00:55:14,540
Bagay la sèlman se ke chak fwa ke
w ap ajoute yon eleman Ranje a

1011
00:55:14,540 --> 00:55:18,170
lis, ou jis chwazi eleman nan ki
se nan devan lis la triye.

1012
00:55:18,170 --> 00:55:20,880
Lè sa a, w ap ale nan jwenn sa
pozisyon li ta dwe nan Ranje a

1013
00:55:20,880 --> 00:55:22,300
yon pati nan lis la.

1014
00:55:22,300 --> 00:55:25,840
>> Ann wè sa ki sa a se konsa
sa a fè sans pi plis.

1015
00:55:25,840 --> 00:55:29,360
Se konsa, okòmansman, pou egzanp, mwen ap eseye
insert nimewo a twa nan nan

1016
00:55:29,360 --> 00:55:30,680
Ranje yon pati nan lis la.

1017
00:55:30,680 --> 00:55:31,800
Se konsa, lis la pa gen anyen.

1018
00:55:31,800 --> 00:55:34,160
Se konsa, mwen ka jis mete nimewo a 3.

1019
00:55:34,160 --> 00:55:37,480
>> Koulye a, mwen vle ajoute nimewo a 5 a
pati nan Ranje nan lis la.

1020
00:55:37,480 --> 00:55:38,900
Se konsa, mwen gade nan nimewo a 5.

1021
00:55:38,900 --> 00:55:40,450
Mwen remake ke li nan pi gran pase 3.

1022
00:55:40,450 --> 00:55:41,980
Se konsa, mwen konnen ke li gen yo dwe apre 3.

1023
00:55:41,980 --> 00:55:44,100
Se konsa, mwen mete 3 ak 5.

1024
00:55:44,100 --> 00:55:45,940
>> Lè sa a, mwen vle insert nimewo 2 a.

1025
00:55:45,940 --> 00:55:51,630
Mwen remake ke nimewo 2 a se aktyèlman
dire Lè sa a, tou de 3 ak 5.

1026
00:55:51,630 --> 00:55:54,580
Se konsa, mwen aktyèlman gen yo mete nan li tout
fason nan konmansman an nan lis la.

1027
00:55:54,580 --> 00:55:59,030
Se konsa, mwen gen yo, kalite, chanjman nan tout
eleman nan lis la Ranje pou m ka

1028
00:55:59,030 --> 00:56:01,970
fè plas pou nimewo 2 a.

1029
00:56:01,970 --> 00:56:03,160
>> Lè sa a, mwen wè nimewo a 6.

1030
00:56:03,160 --> 00:56:05,450
Mwen wè ke li ta dwe apre 5.

1031
00:56:05,450 --> 00:56:06,240
Se konsa, mwen mete l 'la.

1032
00:56:06,240 --> 00:56:07,965
Epi finalman, mwen gade nan nimewo a 4.

1033
00:56:07,965 --> 00:56:11,030
Apre sa, mwen remake li ta dwe
gen ant 3 ak 5.

1034
00:56:11,030 --> 00:56:14,870
Lè sa a, mwen mete l 'gen ak chanjman
tout lòt eleman yo.

1035
00:56:14,870 --> 00:56:16,120
Fè sans?

1036
00:56:16,120 --> 00:56:17,880

1037
00:56:17,880 --> 00:56:19,150
>> Jarèt Triye.

1038
00:56:19,150 --> 00:56:25,730
Se konsa, sòt jarèt se fondamantalman sa w ap
ale nan do-- nou rele li ti wonn

1039
00:56:25,730 --> 00:56:30,113
sòt paske ou ale nan list-- la
li la aktyèlman pi bon si mwen jis montre

1040
00:56:30,113 --> 00:56:32,300
ou renmen this--

1041
00:56:32,300 --> 00:56:35,030
epi ou ap ale nan konpare
nimewo adjasan.

1042
00:56:35,030 --> 00:56:38,410
Epi w ap ale nan swap yo
pozisyon yo si yo pa ap

1043
00:56:38,410 --> 00:56:39,190
nan lòd ki dwat.

1044
00:56:39,190 --> 00:56:42,570
>> Se konsa, fondamantalman, ki sa ki pwal
rive se isit la, pou egzanp,

1045
00:56:42,570 --> 00:56:44,160
ou gen 8 ak 6.

1046
00:56:44,160 --> 00:56:47,270
Ou konnen ke lòd la Ranje pral
aktyèlman ap 6 ak 5, dwa?

1047
00:56:47,270 --> 00:56:49,540
Se konsa, w ap ale nan swap lòd yo.

1048
00:56:49,540 --> 00:56:51,370
Lè sa a, mwen wè 8 ak 4 isit la.

1049
00:56:51,370 --> 00:56:52,250
Apre sa, mwen fè menm bagay la.

1050
00:56:52,250 --> 00:56:53,400
Mwen swap ankò.

1051
00:56:53,400 --> 00:56:55,070
Epi finalman, 2 ak 8.

1052
00:56:55,070 --> 00:56:56,670
Mwen menm mwen te boukante yo.

1053
00:56:56,670 --> 00:57:01,690
>> Yo rele li jarèt Triye paske apre
chak nan itérations sa yo, aktyèlman,

1054
00:57:01,690 --> 00:57:05,910
nimewo a pi gwo nan lis la vin tout
wout la nan fen a nan lis la.

1055
00:57:05,910 --> 00:57:06,940
ki fè sans?

1056
00:57:06,940 --> 00:57:11,880
Paske li kenbe échanjé li
ak deplase li nan bò dwat la.

1057
00:57:11,880 --> 00:57:14,440
>> OK, se konsa sa a se dezyèm iteration la.

1058
00:57:14,440 --> 00:57:17,200
Li ta menm bagay la.

1059
00:57:17,200 --> 00:57:20,190
Mwen pral fè yon sèl swap ak
Lè sa a, yon sèl ki sot pase a.

1060
00:57:20,190 --> 00:57:23,290
Mwen ke pa gen okenn echanj
epi li se lis la Ranje.

1061
00:57:23,290 --> 00:57:27,460
Se konsa, nan Triye jarèt, nou fondamantalman kenbe
ale atravè tout lis la ak échanjé

1062
00:57:27,460 --> 00:57:32,310
bagay sa yo jouk tan mwen remake ke mwen pa t 'fè
nenpòt ki echanj fè sa iteration, ki

1063
00:57:32,310 --> 00:57:34,270
vle di ke lis se deja klase.

1064
00:57:34,270 --> 00:57:35,520
Fè sans?

1065
00:57:35,520 --> 00:57:38,400

1066
00:57:38,400 --> 00:57:40,870
>> Se pou nou pale yon ti kras
sou kouri tan.

1067
00:57:40,870 --> 00:57:45,165
Se konsa, ou nèg sonje Big
O, Omega, ak Theta?

1068
00:57:45,165 --> 00:57:49,290

1069
00:57:49,290 --> 00:57:50,990
Yeah?

1070
00:57:50,990 --> 00:57:53,070
OK, ki sa ki Big O, premye nan tout?

1071
00:57:53,070 --> 00:57:54,315
>> ODYANS: [fèbl].

1072
00:57:54,315 --> 00:57:59,070
>> LUCAS: Yeah, sa yo rele yon ka pi mal
ègzekutabl, ki jis vle di ke li nan

1073
00:57:59,070 --> 00:58:03,470
konbyen lajan ou espere pwogram nan
yo pran kouri.

1074
00:58:03,470 --> 00:58:04,910
Tankou, nan tèm of--

1075
00:58:04,910 --> 00:58:06,660
nan sa a n case--.

1076
00:58:06,660 --> 00:58:09,150
Nimewo a nan eleman nan la
lis nan ka ki pi mal la.

1077
00:58:09,150 --> 00:58:12,520
Tankou, nan pi move ka a posib.

1078
00:58:12,520 --> 00:58:17,100
>> Se konsa, pou Triye jarèt, pou egzanp,
nou gen gwo O kare n.

1079
00:58:17,100 --> 00:58:20,580
Poukisa nou bezwen gen sa?

1080
00:58:20,580 --> 00:58:24,716
Poukisa se jarèt Triye Big kare O n?

1081
00:58:24,716 --> 00:58:27,614
>> ODYANS: [fèbl].

1082
00:58:27,614 --> 00:58:35,670
>> LUCAS: Yeah, se konsa ka ki pi mal yo pral
ke mwen pral oblije fè itérations n.

1083
00:58:35,670 --> 00:58:39,260
Se konsa, chak nan itérations yo ki pral
pote eleman nan pi gwo nan fen a

1084
00:58:39,260 --> 00:58:40,290
nan lis la.

1085
00:58:40,290 --> 00:58:44,230
Se konsa, ka ki pi mal se ke mwen gen
fè ke bagay n fwa.

1086
00:58:44,230 --> 00:58:48,550
Epi pou chak nan sa yo fwa, mwen gen
fè echanj n paske mwen gen yo konpare

1087
00:58:48,550 --> 00:58:49,870
chak de eleman.

1088
00:58:49,870 --> 00:58:53,730
Se konsa, Se poutèt sa li an n okib
paske li nan n fwa n.

1089
00:58:53,730 --> 00:59:00,120
>> Lè sa a, sòt seleksyon tou n kare se
paske, pou chak iteration, mwen gen

1090
00:59:00,120 --> 00:59:02,650
gade nan chak eleman sèl
nan lis la.

1091
00:59:02,650 --> 00:59:04,980
Lè sa a, jwenn pi piti a,
ki vle di ke mwen gen yo

1092
00:59:04,980 --> 00:59:06,130
gade nan eleman n.

1093
00:59:06,130 --> 00:59:11,750
Apre sa, mwen dwe fè ke fwa n paske
Mwen gen yo chwazi tout eleman ki n.

1094
00:59:11,750 --> 00:59:18,273
>> Yon sòt ensèsyon tou n kare se
paske senaryo a ka pi move pral

1095
00:59:18,273 --> 00:59:20,950
dwe, youn, mwen gen insert
nimewo n, dwa?

1096
00:59:20,950 --> 00:59:22,765
Se konsa, mwen deja konnen ke mwen pral
gen itérations n.

1097
00:59:22,765 --> 00:59:25,466

1098
00:59:25,466 --> 00:59:29,840
Men, pou chak nan nimewo sa yo, si mwen te gen
fè yon gade nan tout nan nimewo ki nan

1099
00:59:29,840 --> 00:59:34,380
lis la klase epi li mete l 'tout wout la
nan devan an, ki pral n kare

1100
00:59:34,380 --> 00:59:36,230
paske li pral n fwa n ankò.

1101
00:59:36,230 --> 00:59:38,280
Fè sans?

1102
00:59:38,280 --> 00:59:41,512
Ki sa ki sou omega?

1103
00:59:41,512 --> 00:59:42,886
>> ODYANS: [fèbl].

1104
00:59:42,886 --> 00:59:44,620
>> LUCAS: Se senaryo a ka pi byen.

1105
00:59:44,620 --> 00:59:48,810
Se konsa, li tankou, nan yon anpil nan fwa pou
klasman, senaryo a ka pi bon se

1106
00:59:48,810 --> 00:59:50,660
lè se lis la deja klase.

1107
00:59:50,660 --> 00:59:52,670
Se konsa, ou pa vrèman gen
fè anyen.

1108
00:59:52,670 --> 00:59:56,290
Triye jarèt gen pi bon an
ka senaryo nan n.

1109
00:59:56,290 --> 00:59:58,820
ou nèg konnen poukisa?

1110
00:59:58,820 --> 01:00:00,620
>> ODYANS: [fèbl].

1111
01:00:00,620 --> 01:00:05,640
>> LUCAS: Yeah, si ou kenbe tras nan
si wi ou non done rasyon te gen nenpòt echanj oswa

1112
01:00:05,640 --> 01:00:10,533
pa, si ou gen yon bagay tankou mete nan
vre si te gen yon iteration, si nan

1113
01:00:10,533 --> 01:00:15,140
Se lis deja klase, fondamantalman,
sa k pral rive se mwen pral

1114
01:00:15,140 --> 01:00:17,890
eseye swap chak de
eleman adjasan.

1115
01:00:17,890 --> 01:00:19,920
Mwen pral wè ke
pa gen okenn echanj.

1116
01:00:19,920 --> 01:00:21,230
Apre sa, mwen jis retounen touswit.

1117
01:00:21,230 --> 01:00:24,240
>> Se konsa, li vle di ke mwen jis te gen nan
ale nan lis yon sèl fwa a.

1118
01:00:24,240 --> 01:00:28,990
Se konsa, li n paske mwen gade
nan n eleman.

1119
01:00:28,990 --> 01:00:30,930
Poukisa seleksyon sòt n kare?

1120
01:00:30,930 --> 01:00:35,150

1121
01:00:35,150 --> 01:00:45,520
>> Yeah, menm si se lis la Ranje, pou
chak iterasyon nan sòt seleksyon, mwen

1122
01:00:45,520 --> 01:00:47,590
gen yo chwazi eleman nan minimòm.

1123
01:00:47,590 --> 01:00:49,980
Se konsa, sa vle di ke mwen gen soti nan gade
nan tout eleman yo nan triye la

1124
01:00:49,980 --> 01:00:53,350
lis epi jwenn minimòm la
pou chak iteration.

1125
01:00:53,350 --> 01:00:54,600
ki fè sans?

1126
01:00:54,600 --> 01:00:56,880

1127
01:00:56,880 --> 01:01:04,690
>> Ak nepe ensèsyon se n paske nan la
ka sa a mwen ap eseye insert nan

1128
01:01:04,690 --> 01:01:09,320
nimewo ak tout nan nimewo ki, lè m '
eseye insert yo, mwen wè yo ke yo

1129
01:01:09,320 --> 01:01:10,510
se nan yon pozisyon dwat la.

1130
01:01:10,510 --> 01:01:15,120
Mwen pa gen yo ale tcheke lòt nan tout
nimewo nan lis la triye.

1131
01:01:15,120 --> 01:01:17,170
Se konsa, Se poutèt sa li pral n.

1132
01:01:17,170 --> 01:01:19,480
Fè sans?

1133
01:01:19,480 --> 01:01:21,035
Ak sa ki Theta?

1134
01:01:21,035 --> 01:01:23,410
>> ODYANS: [fèbl].

1135
01:01:23,410 --> 01:01:24,380
>> LUCAS: Ki sa, regrèt?

1136
01:01:24,380 --> 01:01:24,960
Di l 'ankò.

1137
01:01:24,960 --> 01:01:25,666
>> ODYANS: [fèbl].

1138
01:01:25,666 --> 01:01:26,490
>> LUCAS: Egzakteman.

1139
01:01:26,490 --> 01:01:31,280
Se konsa, ou ka wè ke seleksyon sèlman
ki estoke nan rantre sòt gen thetas.

1140
01:01:31,280 --> 01:01:39,920
Epi sa a, paske ou gen sèlman Theta
si toude Big O ak Omega yo se menm bagay la.

1141
01:01:39,920 --> 01:01:41,520
OK.

1142
01:01:41,520 --> 01:01:44,210
Epi finalman, rantre sòt se nan boutèy demi lit n.

1143
01:01:44,210 --> 01:01:48,910
>> Lè sa a,, menm jan Dann te di, Rantre sòt
se kalite tankou menm fason ke

1144
01:01:48,910 --> 01:01:50,320
ou fè rechèch binè.

1145
01:01:50,320 --> 01:01:53,530
Se konsa, ou jwenn lis la.

1146
01:01:53,530 --> 01:01:55,170
Epi w ap ale nan koupe an mwatye.

1147
01:01:55,170 --> 01:02:00,580
Lè sa a, ou koupe yo
nan pi piti mwatye.

1148
01:02:00,580 --> 01:02:01,730
Lè sa a, ou rantre yo.

1149
01:02:01,730 --> 01:02:02,960
Ou nèg sonje ke, dwa?

1150
01:02:02,960 --> 01:02:04,960
OK, jan l 'te di.

1151
01:02:04,960 --> 01:02:08,330
>> OK, endikasyon.

1152
01:02:08,330 --> 01:02:11,078
Se konsa, sa se yon konsèy?

1153
01:02:11,078 --> 01:02:12,050
>> ODYANS: [fèbl].

1154
01:02:12,050 --> 01:02:12,820
>> LUCAS: Yon adrès.

1155
01:02:12,820 --> 01:02:13,720
OK.

1156
01:02:13,720 --> 01:02:18,530
Mwen konnen ke David montre yon pakèt moun sou
videyo nan binky ak bagay sa yo montre

1157
01:02:18,530 --> 01:02:19,080
youn ak lòt.

1158
01:02:19,080 --> 01:02:22,960
Men, mwen renmen panse a endikasyon
kòm senpleman yon adrès.

1159
01:02:22,960 --> 01:02:26,110
Se konsa, li yon varyab ki pral
nan magazen yon adrès.

1160
01:02:26,110 --> 01:02:31,940
>> Se konsa, li jis varyab espesyal sa a
ki se kat bytes long.

1161
01:02:31,940 --> 01:02:36,550
Sonje, ki konsèy nan anyen se
toujou kat bytes lontan pou 32-ti jan nou an

1162
01:02:36,550 --> 01:02:39,370
machin se konsa ka a ak
aparèy la.

1163
01:02:39,370 --> 01:02:41,920

1164
01:02:41,920 --> 01:02:47,050
Epi li jis gen kote nan
nan yon varyab andedan nan li.

1165
01:02:47,050 --> 01:02:50,240
>> OK, se konsa gen nan sa a memwa, fondamantalman.

1166
01:02:50,240 --> 01:02:57,420
Se konsa, chak blòk nan memwa aktyèlman gen yon
mete etikèt sou, ki se adrès ki nan a

1167
01:02:57,420 --> 01:02:58,890
slotty memwa.

1168
01:02:58,890 --> 01:03:02,370
Se konsa, ki vle di ke mwen ka gen
yon montre konsèy nan

1169
01:03:02,370 --> 01:03:03,380
nenpòt nan adrès sa yo.

1170
01:03:03,380 --> 01:03:09,930
Se konsa, rezon an pou kisa nou pral sèvi ak endikasyon se
si mwen gen sonje kote a

1171
01:03:09,930 --> 01:03:12,300
ke yon varyab espesifik se yon memwa.

1172
01:03:12,300 --> 01:03:16,560
>> Epi ou nèg sonje ke youn nan moun ki
ka te si mwen gen yon fonksyon

1173
01:03:16,560 --> 01:03:20,820
si mwen gen aktyèlman vle ou
swap pou ril, mwen aktyèlman

1174
01:03:20,820 --> 01:03:22,110
gen voye yon konsèy.

1175
01:03:22,110 --> 01:03:23,460
Pa varyab la.

1176
01:03:23,460 --> 01:03:25,200
ou nèg sonje ke?

1177
01:03:25,200 --> 01:03:26,450
Between-- la diferans

1178
01:03:26,450 --> 01:03:33,350

1179
01:03:33,350 --> 01:03:34,120
ki sa ki non a?

1180
01:03:34,120 --> 01:03:36,010
Rele pa valè ak rele
pa referans, dwa?

1181
01:03:36,010 --> 01:03:36,840
>> OK, yeah.

1182
01:03:36,840 --> 01:03:38,330
Se konsa, rele yo pa vo anyen.

1183
01:03:38,330 --> 01:03:43,570
Lè ou jis voye yon varyab
fonksyone w ap sèlman voye yon valè.

1184
01:03:43,570 --> 01:03:45,610
Se konsa, w ap aktyèlman voye
yon kopi nan varyab la.

1185
01:03:45,610 --> 01:03:49,720
Ak pwogram ou an pa t 'kapab pran swen mwens
sou si varyab a menm aktyèlman

1186
01:03:49,720 --> 01:03:51,650
fè yon kopi.

1187
01:03:51,650 --> 01:03:56,330
>> Ak rele pa referans vle di ke
Mwen aktyèlman voye yon kopi nan

1188
01:03:56,330 --> 01:03:57,550
konsèy nan varyab sa a.

1189
01:03:57,550 --> 01:04:00,970
Se konsa, sa vle di ke mwen ap voye a
kote nan varyab sa a.

1190
01:04:00,970 --> 01:04:04,440
Se konsa, santi mwen gen kote adrès la nan la
varyab, lè m 'rele fonksyon an

1191
01:04:04,440 --> 01:04:09,700
ak endikasyon, mwen kapab aktyèlman
chanje done yo ki te nan prensipal la.

1192
01:04:09,700 --> 01:04:12,050
Fè sans?

1193
01:04:12,050 --> 01:04:17,560
>> Malgre ke, konsèy la se nan yon kopi,
konsèy toujou gen adrès la reyèl nan

1194
01:04:17,560 --> 01:04:20,090
varyab la ke mwen vle chanje.

1195
01:04:20,090 --> 01:04:21,920
Fè sans?

1196
01:04:21,920 --> 01:04:24,290
>> Se konsa, kreye endikasyon.

1197
01:04:24,290 --> 01:04:28,410
Sonje byen, konsèy la toujou gen
kalite a ke li nan montre

1198
01:04:28,410 --> 01:04:29,890
ak Lè sa a yon etwal.

1199
01:04:29,890 --> 01:04:31,030
Lè sa a, ou mete non yo.

1200
01:04:31,030 --> 01:04:35,765
Se konsa, sonje ke chak fwa ou gen
kèlkeswa sa etwal, li la tankou yon konsèy nan

1201
01:04:35,765 --> 01:04:38,990
ke kèlkeswa sa varyab
tape ke ou te gen.

1202
01:04:38,990 --> 01:04:42,850
>> Se konsa, isit la nan zetwal, pou egzanp, li nan
yon konsèy ak yon antye relatif.

1203
01:04:42,850 --> 01:04:47,680
Lè sa a, zetwal Char se yon konsèy
Char zetwal yo ak pou fè.

1204
01:04:47,680 --> 01:04:47,960
Yeah?

1205
01:04:47,960 --> 01:04:52,710
>> ODYANS: E si nou gen yon
konsèy nan n nan zetwal x.

1206
01:04:52,710 --> 01:04:55,255
Mwen konnen ki ka kreye yon konsèy nan x.

1207
01:04:55,255 --> 01:04:59,432
li tou deklare x yon nonb antye relatif?

1208
01:04:59,432 --> 01:05:05,170
>> LUCAS: OK, Se konsa, lè ou di etwal n x,
ou pa ap kreye yon konsèy nan yon

1209
01:05:05,170 --> 01:05:06,000
varyab x.

1210
01:05:06,000 --> 01:05:08,170
W ap kreye yon konsèy yo te rele x.

1211
01:05:08,170 --> 01:05:09,396
>> ODYANS: [fèbl].

1212
01:05:09,396 --> 01:05:14,250
>> LUCAS: Se konsa, lè m 'di etwal n x, mwen se
li di, hey, nan memwa, mwen pral

1213
01:05:14,250 --> 01:05:16,390
jwenn youn nan twa bwat sa yo.

1214
01:05:16,390 --> 01:05:20,750
Men, mwen pral yo di ke ki
a pwal x, ki se

1215
01:05:20,750 --> 01:05:22,000
pral fè yon konsèy.

1216
01:05:22,000 --> 01:05:26,860

1217
01:05:26,860 --> 01:05:30,640
Ak yon bagay ki enteresan sou pwent
se ke nou di yo ke yo gen

1218
01:05:30,640 --> 01:05:32,620
4 bytes pou yon machin 32-ti jan.

1219
01:05:32,620 --> 01:05:36,320
Ak rezon an pou ki se paske
4 bytes yo 32-Bits.

1220
01:05:36,320 --> 01:05:40,490
>> Ak machin ki 64 Bits aktyèlman
gen endikasyon adrès

1221
01:05:40,490 --> 01:05:43,480
ki 64 Bits long.

1222
01:05:43,480 --> 01:05:49,820
Se konsa, li jis vle di ke gwosè a nan la
adrès nan machin nan se diferan.

1223
01:05:49,820 --> 01:05:52,270
>> Se konsa, Indican ak Dereferencing.

1224
01:05:52,270 --> 01:05:54,310
Gen de operatè yo ki
ou nèg ta dwe sonje.

1225
01:05:54,310 --> 01:05:55,450
Premye a se comercial.

1226
01:05:55,450 --> 01:05:56,810
Dezyèm nan se zetwal.

1227
01:05:56,810 --> 01:06:05,060
pa jwenn mele nan ki zetwal yo ak sa a
etwal paske sonje ke, nan

1228
01:06:05,060 --> 01:06:06,950
ka sa a, ou gen zetwal n.

1229
01:06:06,950 --> 01:06:08,700
>> Se tankou yon bagay antye ansanm.

1230
01:06:08,700 --> 01:06:10,720
Gen nan pa gen etwal espas n.

1231
01:06:10,720 --> 01:06:12,070
Se konsa, sa vle di ke li nan kalite la.

1232
01:06:12,070 --> 01:06:14,870
Sonje byen, lè ou gen
zetwal nan varyab, w ap

1233
01:06:14,870 --> 01:06:16,230
ap pale de kalite nan.

1234
01:06:16,230 --> 01:06:20,540
>> Lè ou gen jis zetwal yo ak Lè sa a, nan
non varyab la, sa vle di ke

1235
01:06:20,540 --> 01:06:24,100
w ap dereferencing konsèy la, ki
vle di ke w ap chèche a nan

1236
01:06:24,100 --> 01:06:28,290
konsèy, jwenn adrès la li a
montre nan, ale nan adrès sa a,

1237
01:06:28,290 --> 01:06:30,850
ak gade nan nenpòt lè
ou gen la.

1238
01:06:30,850 --> 01:06:34,310
Se konsa, mwen di elèv mwen ke lè ou gen
etwal, ou ta dwe panse ke li nan

1239
01:06:34,310 --> 01:06:36,850
abrevyasyon nan kontni nan.

1240
01:06:36,850 --> 01:06:39,770
>> Se konsa, si ou gen yon konsèy epi ou
fè zetwal konsèy, li la nan

1241
01:06:39,770 --> 01:06:41,720
kontni nan konsèy la.

1242
01:06:41,720 --> 01:06:44,580
Se konsa, ou ale nan tou sa li nan montre nan
ak gade nan kontni an konstan.

1243
01:06:44,580 --> 01:06:47,730
Epi comercial a se menm bagay la tou
bagay tankou adrès la.

1244
01:06:47,730 --> 01:06:52,560
>> Se konsa, si mwen gen yon varyab a-- tankou, kite la
di ke mwen te fè int yon egal 3--

1245
01:06:52,560 --> 01:06:56,900
si mwen vle jwenn adrès sa a nan
varyab yon memwa, mwen ka jis fè

1246
01:06:56,900 --> 01:06:58,240
comercial a.

1247
01:06:58,240 --> 01:07:00,280
Se konsa, li nan yon adrès.

1248
01:07:00,280 --> 01:07:01,530
Fè sans?

1249
01:07:01,530 --> 01:07:03,790

1250
01:07:03,790 --> 01:07:05,040
>> Se konsa, isit la nan yon egzanp.

1251
01:07:05,040 --> 01:07:08,370

1252
01:07:08,370 --> 01:07:11,530
Sa a ki manke Int b ak int c.

1253
01:07:11,530 --> 01:07:16,520
Se konsa, int yon egal 3 vle di ke
Mwen pral pou yo ale nan memwa.

1254
01:07:16,520 --> 01:07:19,870
Men, mwen pral jwenn yon plas
epi li mete nimewo a 3 isit la.

1255
01:07:19,870 --> 01:07:22,200
>> Lè sa a, int b egal 4.

1256
01:07:22,200 --> 01:07:23,100
Mwen pral fè menm bagay la.

1257
01:07:23,100 --> 01:07:25,840
Ale nan memwa ak mete yon nimewo
4 nan youn nan bwat yo.

1258
01:07:25,840 --> 01:07:27,100
Epi Int egal 5.

1259
01:07:27,100 --> 01:07:29,740
Jwenn yon lòt bwat, li mete yon nimewo 5.

1260
01:07:29,740 --> 01:07:36,160
>> Se konsa, sa se liy sa a fè soti?
zetwal n PA egal comercial a.

1261
01:07:36,160 --> 01:07:37,800
Se konsa, premye nan tout, n zetwal PA.

1262
01:07:37,800 --> 01:07:39,050
Ki sa li ap fè?

1263
01:07:39,050 --> 01:07:40,930

1264
01:07:40,930 --> 01:07:42,298
>> ODYANS: [fèbl].

1265
01:07:42,298 --> 01:07:47,890
>> LUCAS: Yeah, se konsa n zetwal PA, an premye,
deklare yon konsèy rele PA.

1266
01:07:47,890 --> 01:07:53,720
Lè sa a, li nan plase valè a nan
ki konsèy yo dwe adrès la nan yon.

1267
01:07:53,720 --> 01:07:55,790
Se konsa, comercial a.

1268
01:07:55,790 --> 01:07:58,510
Lè sa a, si m 'fè zetwal pb,
sa ki se yon pb zetwal?

1269
01:07:58,510 --> 01:08:02,418

1270
01:08:02,418 --> 01:08:03,150
>> Oh, regrèt.

1271
01:08:03,150 --> 01:08:06,330
Sa a se tou ki disparèt. n zetwal pb.

1272
01:08:06,330 --> 01:08:07,905
Mwen vle di zetwal PC.

1273
01:08:07,905 --> 01:08:11,200
Mwen se konsa regrèt.

1274
01:08:11,200 --> 01:08:11,940
Li nan menm bagay la.

1275
01:08:11,940 --> 01:08:16,408
Men koulye a, mwen se bon ar kreye yon konsèy
b ak Lè sa a yon konsèy nan c.

1276
01:08:16,408 --> 01:08:16,886
Yeah?

1277
01:08:16,886 --> 01:08:18,136
>> ODYANS: [fèbl]?

1278
01:08:18,136 --> 01:08:25,490

1279
01:08:25,490 --> 01:08:26,670
>> LUCAS: Wi.

1280
01:08:26,670 --> 01:08:32,630
Se konsa, si ou ale nan memwa ak ou ale nan
bwat la se sa ki Deziyasyon pou PA,

1281
01:08:32,630 --> 01:08:37,149
w ap aktyèlman ale nan
wè yon adrès nan yon.

1282
01:08:37,149 --> 01:08:38,399
OK?

1283
01:08:38,399 --> 01:08:42,970

1284
01:08:42,970 --> 01:08:43,300
Yeah?

1285
01:08:43,300 --> 01:08:45,605
>> ODYANS: [fèbl]?

1286
01:08:45,605 --> 01:08:49,260
>> LUCAS: Yeah, konsèy se yon adrès.

1287
01:08:49,260 --> 01:08:50,120
Pa janm bliye sa.

1288
01:08:50,120 --> 01:08:52,800
Se tankou ki pi enpòtan an
pati sou pwent.

1289
01:08:52,800 --> 01:08:56,180
Genyen estoke ak adrès
nan kèk varyab.

1290
01:08:56,180 --> 01:08:56,890
Nenpòt lòt bagay?

1291
01:08:56,890 --> 01:08:58,370
Nenpòt lòt kesyon?

1292
01:08:58,370 --> 01:08:59,189
OK.

1293
01:08:59,189 --> 01:09:00,399
>> Se konsa, Endikasyon ak ranje.

1294
01:09:00,399 --> 01:09:08,189
Sonje ke lè m 'fè Int etalaj 3,
fondamantalman, sa m ap fè se mwen se, kalite

1295
01:09:08,189 --> 01:09:12,779
nan, deklare nan yon konsèy.

1296
01:09:12,779 --> 01:09:18,960
Se konsa, etalaj se kalite tankou yon konsèy nan yon
kote espesifik nan memwa nan ki mwen

1297
01:09:18,960 --> 01:09:21,999
resevwa lajan twa fant pou nonm antye relatif.

1298
01:09:21,999 --> 01:09:23,430
ki fè sans?

1299
01:09:23,430 --> 01:09:30,250
>> Se konsa, lè m 'fè int etalaj 3, ki sa mwen se
fè, fondamantalman, se kreye twa

1300
01:09:30,250 --> 01:09:31,479
fant nan memwa.

1301
01:09:31,479 --> 01:09:33,899
Se konsa, mwen jis jwenn twa fant nan memwa.

1302
01:09:33,899 --> 01:09:38,810
Se konsa, si m 'fè, lè sa a, yon etalaj etwal, li
fondamantalman vle di sa ki ekri nan etalaj,

1303
01:09:38,810 --> 01:09:46,180
ki vle di mwen efase konsèy la, m 'ale
nan plas sa a ke li nan montre nan,

1304
01:09:46,180 --> 01:09:47,939
ak mwen mete nimewo a yon sèl.

1305
01:09:47,939 --> 01:09:53,729
>> Lè sa a,, si m 'fè zetwal etalaj plis 1,
sa a, se menm bagay la kòm fè etalaj

1306
01:09:53,729 --> 01:09:59,690
parantèz yon sèl, ki jis vle di m 'ale nan
plas la ke li nan montre nan.

1307
01:09:59,690 --> 01:10:03,000
Lè sa a, plis 1 la fè
m 'chanjman yon sèl pozisyon.

1308
01:10:03,000 --> 01:10:06,510
Se konsa, m 'ale nan pozisyon sa a, aktyèlman,
epi li mete nimewo a de.

1309
01:10:06,510 --> 01:10:10,900
>> Lè sa a,, finalman, lè m 'fè
etalaj plis 2, m 'ale nan kote

1310
01:10:10,900 --> 01:10:11,825
montre etalaj la nan.

1311
01:10:11,825 --> 01:10:14,690
Lè sa a, mwen demenaje nan blòk memwa.

1312
01:10:14,690 --> 01:10:16,240
Lè sa a, mwen mete nimewo a twa isit la.

1313
01:10:16,240 --> 01:10:16,600
Yeah?

1314
01:10:16,600 --> 01:10:21,400
>> ODYANS: Se konsa zetwal etalaj se tou senpleman
li di pwen an trè premye.

1315
01:10:21,400 --> 01:10:25,090
Epi ou ka ajoute 1, jis paske
nou ap sèlman vrèman

1316
01:10:25,090 --> 01:10:27,295
indican ke premye adrès.

1317
01:10:27,295 --> 01:10:28,545
>> LUCAS: Yeah.

1318
01:10:28,545 --> 01:10:32,720

1319
01:10:32,720 --> 01:10:36,020
Poukisa nou, pou egzanp, di etalaj
0, etalaj 1, ak etalaj 2?

1320
01:10:36,020 --> 01:10:38,970

1321
01:10:38,970 --> 01:10:42,790
M ap di, poukisa ou fè 0,
1, 2, 3 olye pou yo 1, 2, 3?

1322
01:10:42,790 --> 01:10:46,550
Youn nan rezon ki se, yon sèl, òdinatè
pwogramasyon prefere yo kòmanse

1323
01:10:46,550 --> 01:10:47,750
konte soti nan 0.

1324
01:10:47,750 --> 01:10:52,370
De se paske lè ou fè etalaj 0,
li nan menm bagay la kòm fè etalaj

1325
01:10:52,370 --> 01:10:56,330
plis 0, ki vle di m 'ale nan
pozisyon sa, epi mwen pa fè sa

1326
01:10:56,330 --> 01:10:59,320
sote nenpòt blòk memwa.

1327
01:10:59,320 --> 01:11:01,750
Se konsa, mwen pa deplase nenpòt ki blòk memwa.

1328
01:11:01,750 --> 01:11:02,015
Yeah?

1329
01:11:02,015 --> 01:11:03,265
>> ODYANS: [fèbl]?

1330
01:11:03,265 --> 01:11:05,928

1331
01:11:05,928 --> 01:11:12,670
>> LUCAS: Se konsa, li te mande ki sa ki
diferans ki genyen ant fè

1332
01:11:12,670 --> 01:11:14,000
sa a oubyen w ap fè malok.

1333
01:11:14,000 --> 01:11:17,550
Youn nan diferans ki genyen se ke
int etalaj 3 se kreye yon

1334
01:11:17,550 --> 01:11:19,260
etalaj sou pil la.

1335
01:11:19,260 --> 01:11:23,080
Epi lè m 'fè malok, li
kreye sou pil la.

1336
01:11:23,080 --> 01:11:25,250
ki fè sans?

1337
01:11:25,250 --> 01:11:28,870
>> Se konsa, kouman malok aktyèlman ap travay?

1338
01:11:28,870 --> 01:11:32,245
Se konsa, poukisa nou menm bezwen sèvi ak malok?

1339
01:11:32,245 --> 01:11:35,730

1340
01:11:35,730 --> 01:11:39,700
Kalite du ou nan figi soti tout
varyab yo ke ou te deklare.

1341
01:11:39,700 --> 01:11:44,040
Apre sa, li kreye espas pou tout
nan yo nan chemine a.

1342
01:11:44,040 --> 01:11:47,180
Se konsa, tout nan varyab ou yo pral
yo dwe yon kote nan chemine a.

1343
01:11:47,180 --> 01:11:49,460
Se konsa, isit la se varyab anviwònman yo.

1344
01:11:49,460 --> 01:11:53,850
>> Se konsa, fondamantalman, espas pou moun varyab
nan memwa se atribye ba nan

1345
01:11:53,850 --> 01:11:55,080
konpile tan.

1346
01:11:55,080 --> 01:11:58,790
Se konsa, sa vle di ke òdinatè ou a gen
konnen tout moun sa yo varyab

1347
01:11:58,790 --> 01:11:59,790
davans.

1348
01:11:59,790 --> 01:12:02,500
Li pa bezwen konnen ki sa valè
w ap ale nan mete nan yo.

1349
01:12:02,500 --> 01:12:05,490
Men li bezwen yo konnen ki jan
memwa anpil ou bezwen.

1350
01:12:05,490 --> 01:12:09,380
>> Men koulye a, kite a di ke, pou egzanp,
w ap kreye yon etalaj oswa pran yon

1351
01:12:09,380 --> 01:12:13,430
fisèl ke w ap pran
soti nan itilizatè a.

1352
01:12:13,430 --> 01:12:17,300
Ou pa konnen konbyen tan fisèl la
a pwal, pou egzanp.

1353
01:12:17,300 --> 01:12:20,600
Se konsa, ou pa konnen egzakteman ki jan anpil
blòk memwa ou asiyen, dwa?

1354
01:12:20,600 --> 01:12:24,120
>> Se konsa, li pa vrèman fè sans pou
ou di mete 100 karaktè.

1355
01:12:24,120 --> 01:12:26,420
Lè sa a, sa ki si itilizatè a ekri 150?

1356
01:12:26,420 --> 01:12:27,670
W ap ale nan dwe vise.

1357
01:12:27,670 --> 01:12:30,160

1358
01:12:30,160 --> 01:12:34,620
>> Se konsa, fondamantalman, ou pa kapab asire w nan ki jan
memwa anpil ou bezwen asiyen

1359
01:12:34,620 --> 01:12:35,960
lè ou konpile pwogram nan.

1360
01:12:35,960 --> 01:12:38,240
Ou jis konnen ke sou kouri tan.

1361
01:12:38,240 --> 01:12:39,950
Se konsa, Se poutèt sa ou gen pil wòch la.

1362
01:12:39,950 --> 01:12:47,610
Se konsa, pil wòch la ki pral gen memwa
ke w ap allocation pandan la

1363
01:12:47,610 --> 01:12:50,810
dire nan kouri nan pwogram nan.

1364
01:12:50,810 --> 01:12:55,780
>> Se konsa, fondamantalman, lè ou fè malok, sa ki
w ap fè se allocation memwa nan

1365
01:12:55,780 --> 01:13:00,160
ègzekutabl, ki vle di ke w ap
n ap deside dwa nan moman sa a ke ou

1366
01:13:00,160 --> 01:13:02,670
ta dwe gen ke memwa.

1367
01:13:02,670 --> 01:13:04,210
Se konsa, se lè w ap allocation li.

1368
01:13:04,210 --> 01:13:06,430
ki fè sans?

1369
01:13:06,430 --> 01:13:11,690
>> Se konsa, sonje, chemine an gen varyab
ke yo te kreye sou konpile tan.

1370
01:13:11,690 --> 01:13:14,560
Lè sa a, pil wòch la gen varyab
ke yo te kreye menm jan ou ale

1371
01:13:14,560 --> 01:13:15,600
ak malok, pou egzanp.

1372
01:13:15,600 --> 01:13:16,850
>> ODYANS: [fèbl]?

1373
01:13:16,850 --> 01:13:19,179

1374
01:13:19,179 --> 01:13:24,340
>> LUCAS: Se konsa, GetString se
ale nan rele malok.

1375
01:13:24,340 --> 01:13:26,710
Kite m 'pale sou malok, ak
Mwen pral eksplike GetString.

1376
01:13:26,710 --> 01:13:32,000
Se konsa, malok se menm bagay la
kòm alokasyon memwa.

1377
01:13:32,000 --> 01:13:34,600
Se konsa, li k ap pase yo asiyen
memwa sou pil wòch la.

1378
01:13:34,600 --> 01:13:40,010
Epi li pral retounen yon konsèy nan
kote yo te ki memwa resevwa lajan an.

1379
01:13:40,010 --> 01:13:43,090
>> Se konsa, lè ou do--

1380
01:13:43,090 --> 01:13:44,910
isit la pou example--

1381
01:13:44,910 --> 01:13:45,830
n zetwal konsèy.

1382
01:13:45,830 --> 01:13:50,520
Lè sa a, konsèy egal malok
gwosè nan fwa pous 10.

1383
01:13:50,520 --> 01:13:52,110
Mwen kreye yon konsèy.

1384
01:13:52,110 --> 01:13:59,020
Lè sa a, mwen deside ke konsèy nan
valè a nan konsèy la ki malok

1385
01:13:59,020 --> 01:13:59,680
an, ap ban m '.

1386
01:13:59,680 --> 01:14:04,150
>> Se konsa, mwen mande malok ou ka asiyen
espas pou 10 nonm antye relatif.

1387
01:14:04,150 --> 01:14:05,390
Sa a ki sa li la di.

1388
01:14:05,390 --> 01:14:09,020
Epi malok ki ban m 'tounen yon
konsèy nan kote sa a.

1389
01:14:09,020 --> 01:14:11,460
Fè sans?

1390
01:14:11,460 --> 01:14:12,270
OK.

1391
01:14:12,270 --> 01:14:17,940
Mwen Ak GetString se, fondamantalman, fè yon
rele malok konsa ou ka asiyen

1392
01:14:17,940 --> 01:14:21,680
memwa pandan ègzekutabl.

1393
01:14:21,680 --> 01:14:26,460
>> Toujou sonje yo tcheke pou nil
paske malok ki pral retounen nil

1394
01:14:26,460 --> 01:14:28,200
si li pa ka asiyen memwa.

1395
01:14:28,200 --> 01:14:31,660
Se pou nou di ke ou mande pou gen yon ridikil
kantite lajan nan memwa.

1396
01:14:31,660 --> 01:14:33,950
Òdinatè w lan pa pral yo dwe
kapab asiyen ki anpil.

1397
01:14:33,950 --> 01:14:36,410
>> Se konsa, malok se jis ale
retounen nil.

1398
01:14:36,410 --> 01:14:42,210
Se konsa, toujou sonje yo tcheke si an
konsèy ke ou te resevwa nan men malok se

1399
01:14:42,210 --> 01:14:45,640
nil oswa ou pa, paske, si li se, ou ta ka
dwe dereferencing yon konsèy ak

1400
01:14:45,640 --> 01:14:48,340
sa ki lakòz fot bò.

1401
01:14:48,340 --> 01:14:50,930
Epi finalman, pa bliye
memwa lib ou.

1402
01:14:50,930 --> 01:14:57,800

1403
01:14:57,800 --> 01:15:00,560
>> Malok se kreye memwa nan pil wòch la.

1404
01:15:00,560 --> 01:15:03,436
Epi ou gen yo libere memwa a
anvan pwogram la fini.

1405
01:15:03,436 --> 01:15:05,370
OK, ki nan tout pou mwen.

1406
01:15:05,370 --> 01:15:07,900
Padon, Rob.

1407
01:15:07,900 --> 01:15:07,950
Mèsi.

1408
01:15:07,950 --> 01:15:09,878
>> [Aplodisman]

1409
01:15:09,878 --> 01:15:12,679
>> LUCAS: Nenpòt kesyon dènye
anvan Rob vini?

1410
01:15:12,679 --> 01:15:13,138
Pa gen okenn?

1411
01:15:13,138 --> 01:15:13,597
Yeah?

1412
01:15:13,597 --> 01:15:15,892
>> ODYANS: Mwen pa t 'wè
yon sèl sa a sou entènèt.

1413
01:15:15,892 --> 01:15:17,269
Eske ou Uploaded li ankò?

1414
01:15:17,269 --> 01:15:19,106
>> LUCAS: Mwen panse ke Dave se
transfere li byento.

1415
01:15:19,106 --> 01:15:19,880
>> DAVE: Li pral afiche.

1416
01:15:19,880 --> 01:15:20,310
>> LUCAS: Li pral entènèt.

1417
01:15:20,310 --> 01:15:21,175
>> ODYANS: Li a jiska.

1418
01:15:21,175 --> 01:15:22,090
>> LUCAS: Li a jiska?

1419
01:15:22,090 --> 01:15:23,157
OK.

1420
01:15:23,157 --> 01:15:23,644
Yeah?

1421
01:15:23,644 --> 01:15:27,053
>> ODYANS: [fèbl]?

1422
01:15:27,053 --> 01:15:30,285
>> LUCAS: Wi, ou ta dwe libere tout la
memwa ki se mete nan pil wòch la.

1423
01:15:30,285 --> 01:15:31,535
>> ODYANS: [fèbl]?

1424
01:15:31,535 --> 01:15:34,518

1425
01:15:34,518 --> 01:15:36,160
>> LUCAS: Wi.

1426
01:15:36,160 --> 01:15:39,980
Nenpòt ki lè ke ou gen yon malok kilti,
ou ta dwe gen yon kilti gratis

1427
01:15:39,980 --> 01:15:42,640
apre ou sispann lè l sèvi avèk varyab sa a.

1428
01:15:42,640 --> 01:15:44,800
Se konsa, malok ak gratis yo
toujou ansanm.

1429
01:15:44,800 --> 01:15:45,410
Pi bon zanmi yo.

1430
01:15:45,410 --> 01:15:46,720
Yeah.

1431
01:15:46,720 --> 01:15:47,970
Rob?

1432
01:15:47,970 --> 01:15:55,595

1433
01:15:55,595 --> 01:15:56,850
>> ROB: Mwen pral ale byen vit.

1434
01:15:56,850 --> 01:16:00,466
Epi tou, y ap videyo a dwe mete kanpe.

1435
01:16:00,466 --> 01:16:01,716
Mwen gen MIC la sou.

1436
01:16:01,716 --> 01:16:24,060

1437
01:16:24,060 --> 01:16:26,230
>> OK, se konsa semèn senk bagay.

1438
01:16:26,230 --> 01:16:27,970
Premye bagay nou genyen se chemine a.

1439
01:16:27,970 --> 01:16:33,390
Se konsa, sonje ke gen nan yon sèl pil
ankadreman pou chak aktif apèl fonksyon.

1440
01:16:33,390 --> 01:16:34,710
Nou pral wè ke nan yon dezyèm fwa.

1441
01:16:34,710 --> 01:16:37,850
Epi tou li sonje sa ki aktyèlman ale
nan chak ankadreman chemine yo pral yo dwe

1442
01:16:37,850 --> 01:16:41,880
varyab yo lokal yo nan fonksyon nou an,
agiman yo ke yo te pase nan nou an

1443
01:16:41,880 --> 01:16:43,880
fonksyon, ansanm ak yon koup
lòt bagay ou pa fè sa vrèman

1444
01:16:43,880 --> 01:16:45,260
bezwen enkyete sou.

1445
01:16:45,260 --> 01:16:50,950
>> Se konsa, isit la nan yon pwogram egzanp kote,
avi, prensipal se printfing retounen nan

1446
01:16:50,950 --> 01:16:52,830
valè de foo 4.

1447
01:16:52,830 --> 01:16:57,930
foo se jis ale nan retounen nan
valè de bar 4 vigil 6.

1448
01:16:57,930 --> 01:17:02,380
Ak bar ki pral mete kèk lokal
n varyab egal a 4 fwa 6.

1449
01:17:02,380 --> 01:17:03,920
Lè sa a, retounen n.

1450
01:17:03,920 --> 01:17:09,130
>> Se konsa, kite pou yo gade nan chemine a nan tout
iteration aktyèl la nan pwogram sa a.

1451
01:17:09,130 --> 01:17:10,500
Se konsa, gen nan pati anba a nan chemine nou an.

1452
01:17:10,500 --> 01:17:12,620
Sonje ke chemine a grandi.

1453
01:17:12,620 --> 01:17:15,370
Se konsa, nan pati anba a nan chemine nou an, nou
gen yon ankadreman chemine pou prensipal la.

1454
01:17:15,370 --> 01:17:17,000
Lè pwogram lan kòmanse, prensipal
se toujou pral yo dwe nan a

1455
01:17:17,000 --> 01:17:18,560
anba nan chemine nou an.

1456
01:17:18,560 --> 01:17:20,880
>> Ak sa ki andedan nan nou an
chemine ankadreman pou prensipal yo?

1457
01:17:20,880 --> 01:17:23,810
Se konsa, menm si pa gen okenn lokal
varyab prensipal la, tankou mwen te di anvan,

1458
01:17:23,810 --> 01:17:29,670
nou te arg ak rgv pran moute espas
andedan nan prensipal ankadreman chemine.

1459
01:17:29,670 --> 01:17:33,260
Se konsa, prensipal se kounye a pral
rele foo an fonksyon.

1460
01:17:33,260 --> 01:17:35,125
Lè sa vle di foo ki pral
jwenn pwòp li yo ankadreman chemine.

1461
01:17:35,125 --> 01:17:36,970
>> Se konsa, kounye a nou ap andedan nan
foo an fonksyon.

1462
01:17:36,970 --> 01:17:38,610
Ak sa ki bezwen ale nan
chemine ankadreman foo a?

1463
01:17:38,610 --> 01:17:41,100
Oke, foo gen yon agiman n.

1464
01:17:41,100 --> 01:17:45,440
Ak n se egal a 4 depi se sa ki
prensipal ap pase kòm agiman foo la.

1465
01:17:45,440 --> 01:17:48,490
>> Se konsa, kounye foo ki pral rele ba.

1466
01:17:48,490 --> 01:17:52,070
Ki sa ki ba pral gen anndan
nan 'ankadreman chemine li yo?

1467
01:17:52,070 --> 01:17:55,610
Li te gen x egal a 4 y egal a sis.

1468
01:17:55,610 --> 01:17:58,540
Sa a pa tout sa ki nou ap ale nan gen
nan ankadreman an pil paske ba

1469
01:17:58,540 --> 01:18:00,580
tou te gen yon n varyab lokal yo.

1470
01:18:00,580 --> 01:18:03,370
Ak n nou ap ale nan mete egal a 24.

1471
01:18:03,370 --> 01:18:05,750
>> Se konsa, kounye bar ki pral retounen n.

1472
01:18:05,750 --> 01:18:09,300
Se konsa, ba ki retounen 24 a
foo nan chemine ankadreman.

1473
01:18:09,300 --> 01:18:12,560
Epi paske bar se kounye a retounen, ki
vle di nou ap eklate ankadreman an pil

1474
01:18:12,560 --> 01:18:14,250
pou ba koupe nan chemine a.

1475
01:18:14,250 --> 01:18:18,430
Se konsa, tout memwa nan ki ba te
lè l sèvi avèk se kounye a nan chemine a.

1476
01:18:18,430 --> 01:18:21,550
>> Koulye a, foo se tou ale
retounen 24 a prensipal la.

1477
01:18:21,550 --> 01:18:25,470
Se konsa, kounye a ke foo se retounen, memwa a
ki foo te lè l sèvi avèk nan 'li yo

1478
01:18:25,470 --> 01:18:27,550
se ankadreman chemine tou ale.

1479
01:18:27,550 --> 01:18:29,660
Epi, koulye a, prensipal ki pral rele printf.

1480
01:18:29,660 --> 01:18:31,660
Se konsa, printf se jis yon lòt fonksyon.

1481
01:18:31,660 --> 01:18:35,320
Lè nou rele printf, li pral yo dwe
yon lòt ankadreman chemine pou printf la

1482
01:18:35,320 --> 01:18:36,470
fonksyon apèl.

1483
01:18:36,470 --> 01:18:37,990
>> Ki sa yo nou pase printf?

1484
01:18:37,990 --> 01:18:40,090
Sa a ki sa k ap pase ale
sou ankadreman chemine li yo.

1485
01:18:40,090 --> 01:18:44,970
Omwen a anpil, nou ap pase
ki pousan mwen antislach n ak

1486
01:18:44,970 --> 01:18:47,180
agiman an 24.

1487
01:18:47,180 --> 01:18:50,370
Li ta ka gen plis nan li nan chemine ankadreman
si printf k ap pase yo dwe lè l sèvi avèk kèk

1488
01:18:50,370 --> 01:18:51,200
varyab lokal.

1489
01:18:51,200 --> 01:18:51,920
Nou pa konnen.

1490
01:18:51,920 --> 01:18:53,810
>> Men, tout sa ki ale nan printf a
chemine ankadreman.

1491
01:18:53,810 --> 01:18:55,740
Li nan pral egzekite printf la.

1492
01:18:55,740 --> 01:18:56,830
Lè sa a, printf a fè.

1493
01:18:56,830 --> 01:18:57,820
Li pral retounen.

1494
01:18:57,820 --> 01:18:58,960
Finalman, prensipal se fè.

1495
01:18:58,960 --> 01:18:59,860
Main pral retounen.

1496
01:18:59,860 --> 01:19:02,020
Lè sa a, se pwogram nou an fè.

1497
01:19:02,020 --> 01:19:02,480
Yeah?

1498
01:19:02,480 --> 01:19:04,505
>> ODYANS: Èske ou wè [fèbl]

1499
01:19:04,505 --> 01:19:05,900
agiman [fèbl]

1500
01:19:05,900 --> 01:19:06,830
paramèt?

1501
01:19:06,830 --> 01:19:09,970
>> ROB: Se konsa, gen se yon diferans sibtil
ant agiman ak paramèt.

1502
01:19:09,970 --> 01:19:14,400
E reyèlman, an komen pale, moun ki gen tandans
nan jis melanje yo moute tout tan tout tan an.

1503
01:19:14,400 --> 01:19:17,550
Men, paramèt yo se fòmèl la
non nan bagay sa yo.

1504
01:19:17,550 --> 01:19:20,180
>> Se konsa, arg ak argv yo nan
paramèt prensipal la.

1505
01:19:20,180 --> 01:19:23,440
Agiman yo se ki sa ou aktyèlman
pase nan kòm paramèt sa yo.

1506
01:19:23,440 --> 01:19:28,340
Se konsa, gen lè m'ap rele foo nan 4, 4
se agiman an mwen pase nan.

1507
01:19:28,340 --> 01:19:31,460
Ak n nan paramèt, andedan nan
foo, pran sou valè nan 4

1508
01:19:31,460 --> 01:19:32,880
depi 4 te agiman an.

1509
01:19:32,880 --> 01:19:35,826
>> ODYANS: [fèbl]?

1510
01:19:35,826 --> 01:19:37,880
>> ROB: n se yon varyab lokal yo ba.

1511
01:19:37,880 --> 01:19:41,420

1512
01:19:41,420 --> 01:19:44,960
n se toujou lokal yo foo, men
li nan yon paramèt foo.

1513
01:19:44,960 --> 01:19:48,190
Li pa yon varyab lokal yo.

1514
01:19:48,190 --> 01:19:48,546
Yeah?

1515
01:19:48,546 --> 01:19:51,180
>> ODYANS: [fèbl]?

1516
01:19:51,180 --> 01:19:55,400
>> ROB: foo se jis rele bar ak
retounen tou sa ba retounen.

1517
01:19:55,400 --> 01:19:56,786
>> ODYANS: [fèbl]?

1518
01:19:56,786 --> 01:19:59,591
>> ROB: Yeah, jis yo wè miltip
chemine ankadreman.

1519
01:19:59,591 --> 01:20:00,082
Yeah?

1520
01:20:00,082 --> 01:20:03,519
>> ODYANS: Poukisa foo te rele
anvan printf?

1521
01:20:03,519 --> 01:20:05,920
>> ROB: Poukisa yo te foo rele anvan printf?

1522
01:20:05,920 --> 01:20:10,740
Se konsa, mwen te kapab gen, olye de sa, fè yon bagay
tankou int x egal foo nan 4

1523
01:20:10,740 --> 01:20:12,980
ak Lè sa a enprime x.

1524
01:20:12,980 --> 01:20:17,900
Men, olye de sa, mwen konbine fonksyon an
rele nan agiman an printf.

1525
01:20:17,900 --> 01:20:23,670
>> Men, remake ke nou pa ka aktyèlman
egzekite apèl la printf jiskaske nou

1526
01:20:23,670 --> 01:20:25,610
konnen sa ki foo nan 4 se.

1527
01:20:25,610 --> 01:20:27,480
Se konsa, nou ap ale nan evalye sa a.

1528
01:20:27,480 --> 01:20:32,504
Ak sèlman yon fwa ki nan fè yo ale
tounen vin ak evalye sa a.

1529
01:20:32,504 --> 01:20:32,990
Yeah?

1530
01:20:32,990 --> 01:20:37,364
>> ODYANS: Depi tou de ba [fèbl]

1531
01:20:37,364 --> 01:20:41,738
valè, poukisa nou pa jwenn okenn [fèbl]?

1532
01:20:41,738 --> 01:20:44,400
>> ROB: Yo totalman ta dwe Int.

1533
01:20:44,400 --> 01:20:46,260
Sa pa te kenbe sou
miltip pass.

1534
01:20:46,260 --> 01:20:49,010
Se konsa, li ta dwe ba int ak int
foo depi tou de nan sa yo

1535
01:20:49,010 --> 01:20:50,460
ap retounen nonm antye relatif.

1536
01:20:50,460 --> 01:20:54,214
Anile se sèlman si yo pa ap ale
retounen valè vrè.

1537
01:20:54,214 --> 01:20:54,692
Yeah?

1538
01:20:54,692 --> 01:20:58,038
>> ODYANS: Si ou te gen yon liy pi wo a
retounen nan, [fèbl]?

1539
01:20:58,038 --> 01:21:01,862

1540
01:21:01,862 --> 01:21:03,730
>> ROB: Yon liy pi wo a retounen nan?

1541
01:21:03,730 --> 01:21:04,410
>> ODYANS: Yeah.

1542
01:21:04,410 --> 01:21:10,780
Menm jan ak si ou te fè printf ak [fèbl],
li ta ekri ak lèt ​​detache de fwa?

1543
01:21:10,780 --> 01:21:12,992
>> ROB: Se konsa andedan nan foo?

1544
01:21:12,992 --> 01:21:15,945
Si nou te gen yon printf dwa isit la?

1545
01:21:15,945 --> 01:21:16,750
>> ODYANS: Yeah.

1546
01:21:16,750 --> 01:21:19,510
>> ROB: Se konsa, si nou te gen yon dwa printf
isit la, li ta ekri ak lèt ​​detache yon fwa.

1547
01:21:19,510 --> 01:21:23,400
Depi nou ap rele foo yon fwa dwa
isit la, Lè sa a, nou pral frape printf la.

1548
01:21:23,400 --> 01:21:24,620
Lè sa a, nou pral rele ba.

1549
01:21:24,620 --> 01:21:25,710
Lè sa a, foo pral retounen.

1550
01:21:25,710 --> 01:21:26,275
Epi sa a, li.

1551
01:21:26,275 --> 01:21:30,985
Nou sèlman tout tan tout tan rankontre
printf nan yon fwa.

1552
01:21:30,985 --> 01:21:31,482
Yeah?

1553
01:21:31,482 --> 01:21:32,973
>> ODYANS: [fèbl]

1554
01:21:32,973 --> 01:21:37,950
printf rele foo paske nou premye
rele printf ak Lè sa a nou ap pase

1555
01:21:37,950 --> 01:21:38,580
agiman yo.

1556
01:21:38,580 --> 01:21:40,960
>> ROB: Se konsa, nan teyori, se pa
printf rele foo?

1557
01:21:40,960 --> 01:21:42,220
Se konsa, pa gen okenn.

1558
01:21:42,220 --> 01:21:47,360
Jis lòd la ki c ki pral
egzekite bagay sa yo se, anvan nou kapab

1559
01:21:47,360 --> 01:21:49,800
rele yon fonksyon, tout nan agiman yo
nan fonksyon an gen

1560
01:21:49,800 --> 01:21:51,600
ap evalye nèt.

1561
01:21:51,600 --> 01:21:53,540
Se konsa, se sa a konplètman evalye?

1562
01:21:53,540 --> 01:21:54,610
Wi, li nan jis yon fisèl.

1563
01:21:54,610 --> 01:21:55,480
Se jis nan yon valè.

1564
01:21:55,480 --> 01:21:57,200
>> Lè sa a, nou gen konplètman
evalye sa a.

1565
01:21:57,200 --> 01:21:59,720
Yon fwa sa a se fè, kounye a tout moun nan
yo evalye agiman li yo.

1566
01:21:59,720 --> 01:22:01,982
Epi, koulye a nou ka fè an
rele printf.

1567
01:22:01,982 --> 01:22:02,478
Yeah?

1568
01:22:02,478 --> 01:22:03,966
>> ODYANS: Yon kesyon.

1569
01:22:03,966 --> 01:22:06,942
Si ou gen yon fonksyon anile, yo dwe
ou gen retounen virgules?

1570
01:22:06,942 --> 01:22:09,910
>> ROB: Ou pa fè sa yon virgules retounen
si ou gen yon fonksyon anile.

1571
01:22:09,910 --> 01:22:13,370

1572
01:22:13,370 --> 01:22:14,780
OK.

1573
01:22:14,780 --> 01:22:15,830
Se konsa, kounye kèk bagay pil wòch.

1574
01:22:15,830 --> 01:22:19,640
Se konsa, pil wòch se ki jan nou pral fè fas
ak jesyon memwa dinamik.

1575
01:22:19,640 --> 01:22:23,100
Lè sa a dirèkteman diferansye ak nan
chemine ki nou ta ka rele otomatik

1576
01:22:23,100 --> 01:22:24,100
jesyon memwa.

1577
01:22:24,100 --> 01:22:27,140
>> Se konsa, sou chemine a, pa janm ou reyèlman gen
fè fas ak ki jan varyab lokal yo

1578
01:22:27,140 --> 01:22:30,400
yo te pouse ak déja koupe tout
sa yo ankadreman chemine ak tout sa ki bagay.

1579
01:22:30,400 --> 01:22:31,070
Ou pa bezwen enkyete sou li.

1580
01:22:31,070 --> 01:22:32,070
Li nan otomatik yo.

1581
01:22:32,070 --> 01:22:36,990
Se konsa, pil wòch la se manyèl.

1582
01:22:36,990 --> 01:22:38,070
Ak [fèbl la]

1583
01:22:38,070 --> 01:22:41,260
soti nan fonksyon sa yo
malok ak gratis.

1584
01:22:41,260 --> 01:22:43,550
>> Se konsa, isit la nan yon lòt pwogram nan.

1585
01:22:43,550 --> 01:22:47,145
Tout sa nou ap fè se mallocing
yon nonb antye relatif.

1586
01:22:47,145 --> 01:22:49,360
Nou ap estoke l 'nan zetwal x.

1587
01:22:49,360 --> 01:22:52,520
Natirèlman, nou gen yo tcheke
yo wè si x se nil.

1588
01:22:52,520 --> 01:22:56,400
Lè sa a, nou ap ale nan jis mete sa
x ap lonje dwèt nan 50.

1589
01:22:56,400 --> 01:23:00,350

1590
01:23:00,350 --> 01:23:03,260
Enprime sa x se lonje dwèt a,
ekri ak lèt ​​detache x, ak Lè sa a gratis x.

1591
01:23:03,260 --> 01:23:08,920
>> Se konsa, kouman sa a se aktyèlman ale nan gade
si nou gade nan chemine nou an ak pil wòch?

1592
01:23:08,920 --> 01:23:10,950
Se konsa, nou pral kòmanse ankò.

1593
01:23:10,950 --> 01:23:12,580
Anba a nan chemine nou an tankou anvan.

1594
01:23:12,580 --> 01:23:15,930
Sonje ke ou chalè dirèkteman
opoze chemine a?

1595
01:23:15,930 --> 01:23:18,850
Se konsa, nou ap ale nan gen nan
tèt nan pil wòch nou an moute a.

1596
01:23:18,850 --> 01:23:22,590
>> Se konsa, anba a nan chemine nou an, nou gen
ankadreman chemine nou an pou prensipal la.

1597
01:23:22,590 --> 01:23:28,000
Li te gen espas ki la pou arg, argv, epi nou
kounye a gen yon x varyab lokal yo, ki

1598
01:23:28,000 --> 01:23:30,030
se yon etwal Int.

1599
01:23:30,030 --> 01:23:32,240
Se konsa, nou ap ale nan repekte
nan pwogram sa a.

1600
01:23:32,240 --> 01:23:34,420
Premye bagay nou genyen se
yon rele nan malok.

1601
01:23:34,420 --> 01:23:36,250
>> Se konsa, nou ap fè yon apèl nan malok.

1602
01:23:36,250 --> 01:23:37,100
Malok se yon fonksyon.

1603
01:23:37,100 --> 01:23:38,770
Li k ap pase yo ka resevwa yon ankadreman chemine.

1604
01:23:38,770 --> 01:23:40,180
Ki sa yo nou pase nan malok?

1605
01:23:40,180 --> 01:23:41,610
Ki nan ale nan ale andedan
nan ankadreman an chemine.

1606
01:23:41,610 --> 01:23:45,130
Nou ap pase gwosè nan n, ki se 4.

1607
01:23:45,130 --> 01:23:49,700
Se konsa, ki se pase bay malok.

1608
01:23:49,700 --> 01:23:50,910
>> Ki sa ki malok fè?

1609
01:23:50,910 --> 01:23:53,820
Li bèn nou kèk espas sou pil wòch la.

1610
01:23:53,820 --> 01:23:55,320
Se konsa, nou ap ale nan ale nan pil wòch la.

1611
01:23:55,320 --> 01:23:57,990
E nou pral gen tan pwan
4 bytes soti nan pil wòch la.

1612
01:23:57,990 --> 01:24:01,500
Se konsa, kite la jis bay ki
yon adrès abitrè.

1613
01:24:01,500 --> 01:24:06,680
0x123 Jis pretann ke se yon
adrès ki se sou pil la.

1614
01:24:06,680 --> 01:24:12,300
>> Se konsa, sa se aktyèlman andedan nan ki
rejyon nan memwa nan adrès Ox123?

1615
01:24:12,300 --> 01:24:13,080
Fatra.

1616
01:24:13,080 --> 01:24:15,270
Se konsa, nou pa t 'ki estoke anyen nan li.

1617
01:24:15,270 --> 01:24:18,830
Se konsa, osi lwen ke nou konnen, li
te kapab anyen.

1618
01:24:18,830 --> 01:24:20,560
Ou pa ta dwe asime li a zewo.

1619
01:24:20,560 --> 01:24:23,870
Li nan gen plis chans pa zewo.

1620
01:24:23,870 --> 01:24:26,260
>> Retounen Se konsa, kounye malok.

1621
01:24:26,260 --> 01:24:28,020
Ak ki sa nou fè lè malok retounen?

1622
01:24:28,020 --> 01:24:29,800
Nou mete sa li tounen lakay la.

1623
01:24:29,800 --> 01:24:32,290
Nou mete x egal a sa
li se retounen.

1624
01:24:32,290 --> 01:24:33,690
Se konsa, sa se li retounen?

1625
01:24:33,690 --> 01:24:38,150
Li nan retounen 0x123 depi ke se nan
adrès nan blòk la nan memwa ke li

1626
01:24:38,150 --> 01:24:40,850
jis resevwa lajan nan pil wòch la.

1627
01:24:40,850 --> 01:24:47,160
>> Se konsa, retounen 0x123 x se kounye a pral yo dwe mete
egal a 0x123 ki, pictorially,

1628
01:24:47,160 --> 01:24:52,940
nou souvan trase kòm x gen yon vrè
flèch montre nan ki blòk.

1629
01:24:52,940 --> 01:24:55,820
Men, x se jis estoke adrès sa.

1630
01:24:55,820 --> 01:24:58,670
Se konsa, kounye a nou gen yo tcheke si x se nil.

1631
01:24:58,670 --> 01:24:59,120
Li pa nil.

1632
01:24:59,120 --> 01:25:02,170
Nou kwe ke ki malok plas.

1633
01:25:02,170 --> 01:25:04,950
>> Se konsa, kounye zetwal x egal 50.

1634
01:25:04,950 --> 01:25:08,450
Se konsa, zetwal sonje li vle di
ale nan adrès sa.

1635
01:25:08,450 --> 01:25:12,700
Se konsa, 0x123 Nou pwal
ale nan adrès sa.

1636
01:25:12,700 --> 01:25:14,660
Se konsa, ki pote nou moute a.

1637
01:25:14,660 --> 01:25:16,310
Ki sa yo nou fè nan adrès sa?

1638
01:25:16,310 --> 01:25:19,020
Nou ap estoke 50.

1639
01:25:19,020 --> 01:25:22,500
>> Se konsa, apre liy sa a, ke se sa ki
bagay yo ap mache yo gade tankou.

1640
01:25:22,500 --> 01:25:24,640
Se konsa, kounye a li nan pa gen okenn ankò
fatra moute a.

1641
01:25:24,640 --> 01:25:28,910
Koulye a, nou konnen ke 50 se nan ki
adrès patikilye paske

1642
01:25:28,910 --> 01:25:32,410
nou mete l 'nan sa.

1643
01:25:32,410 --> 01:25:32,790
OK?

1644
01:25:32,790 --> 01:25:34,370
Se konsa, kounye a nou ap ale nan enprime f.

1645
01:25:34,370 --> 01:25:38,490
>> Se konsa, premye nou ap ale nan enprime zetwal x.

1646
01:25:38,490 --> 01:25:39,640
Se konsa, sa se yon zetwal x?

1647
01:25:39,640 --> 01:25:44,300
Yon fwa ankò, zetwal x vle di ale nan nan
bagay ki x ap montre yo.

1648
01:25:44,300 --> 01:25:47,140
Se konsa, x se estoke 0x123 Ale nan sa.

1649
01:25:47,140 --> 01:25:48,490
Nou jwenn 50.

1650
01:25:48,490 --> 01:25:50,540
Se konsa, enprime f sa.

1651
01:25:50,540 --> 01:25:54,900
Lè sa vle di li pral ekri ak lèt ​​detache 50.

1652
01:25:54,900 --> 01:25:56,850
Lè sa a, ki retounen.

1653
01:25:56,850 --> 01:25:58,340
>> Lè sa a, nou gen dezyèm printf la.

1654
01:25:58,340 --> 01:25:59,370
Nou kounye a pousan p.

1655
01:25:59,370 --> 01:26:01,680
Si ou pa te wè l ', sa a, se
jis ki jan ou enprime yon konsèy.

1656
01:26:01,680 --> 01:26:04,960
Se konsa, nou gen pousan mwen, pousan
f, ak tout moun sa yo deja.

1657
01:26:04,960 --> 01:26:07,160
Se konsa, pousan p, enprime yon konsèy.

1658
01:26:07,160 --> 01:26:08,920
>> Se konsa, x se yon konsèy.

1659
01:26:08,920 --> 01:26:13,440
Se konsa, si nou ap ale nan enprime x tèt li,
nou ap enprime ki sa ki aktyèlman andedan

1660
01:26:13,440 --> 01:26:19,220
x, ki se 0x123 Se konsa, premye a
ekri ak lèt ​​detache f ki pral enprime 50.

1661
01:26:19,220 --> 01:26:23,620
Dezyèm ekri an lèt detache f a ki pral
ekri ak lèt ​​detache 0x123 Yeah?

1662
01:26:23,620 --> 01:26:27,460
>> ODYANS: Èske ou itilize pousan
x ekri ak lèt ​​detache yon konsèy?

1663
01:26:27,460 --> 01:26:31,200
>> ROB: Se konsa, ou sèvi ak pousan
x ekri ak lèt ​​detache yon konsèy?

1664
01:26:31,200 --> 01:26:38,350
Se konsa, ou kapab men pousan x se jis,
jeneralman, pou tankou si ou gen kèk

1665
01:26:38,350 --> 01:26:40,325
nonb antye ki pè, epi ou vle ekri ak lèt ​​detache
li kòm yon ekzadesimal.

1666
01:26:40,325 --> 01:26:43,250

1667
01:26:43,250 --> 01:26:44,880
Se jis ki jan ou fè sa.

1668
01:26:44,880 --> 01:26:47,160
>> Lè nou konsidere ke, pousan d ta
enprime kòm desimal.

1669
01:26:47,160 --> 01:26:50,310
Sa a te nou jwenn pousan
d. mwen se jis nonb antye relatif.

1670
01:26:50,310 --> 01:26:52,690
pousan p se espesyalman
pou endikasyon.

1671
01:26:52,690 --> 01:26:54,060
>> Se konsa, x se yon konsèy.

1672
01:26:54,060 --> 01:26:56,360
Nou vle itilize pousan p.

1673
01:26:56,360 --> 01:26:57,937
Men, pousan x te kapab travay.

1674
01:26:57,937 --> 01:26:58,414
Yeah?

1675
01:26:58,414 --> 01:26:59,664
>> ODYANS: [fèbl]?

1676
01:26:59,664 --> 01:27:04,138

1677
01:27:04,138 --> 01:27:05,388
>> ROB: Yeah.

1678
01:27:05,388 --> 01:27:07,870

1679
01:27:07,870 --> 01:27:13,440
Omwen pou sa a call-- Se konsa, mwen
pa t 'gen ladan li nan isit la.

1680
01:27:13,440 --> 01:27:19,850
Men, de agiman sa yo, se nesesèman
andedan nan sa a ankadreman chemine

1681
01:27:19,850 --> 01:27:23,040
ansanm ak nenpòt varyab lokal
printf k ap pase yo dwe itilize.

1682
01:27:23,040 --> 01:27:27,020
Lè sa a, rele nan pwochen nan printf kounye a
andedan nan printf chemine ankadreman se

1683
01:27:27,020 --> 01:27:33,960
pousan p antislach n ak tou sa a
valè x ki se, ki se 0x123.

1684
01:27:33,960 --> 01:27:34,425
Yeah?

1685
01:27:34,425 --> 01:27:35,675
>> ODYANS: [fèbl]?

1686
01:27:35,675 --> 01:27:38,145

1687
01:27:38,145 --> 01:27:40,880
>> ROB: Li pral enprime yon bagay
ki sanble tankou sa a.

1688
01:27:40,880 --> 01:27:41,846
>> ODYANS: [fèbl].

1689
01:27:41,846 --> 01:27:44,510
>> ROB: Se konsa li simagri li nan fòm adrès.

1690
01:27:44,510 --> 01:27:47,003
Li sanble ke yon adrès.

1691
01:27:47,003 --> 01:27:47,494
Yeah?

1692
01:27:47,494 --> 01:27:49,458
>> ODYANS: [fèbl]?

1693
01:27:49,458 --> 01:27:51,075
>> ROB: Poukisa se sa?

1694
01:27:51,075 --> 01:27:52,920
>> ODYANS: [fèbl]?

1695
01:27:52,920 --> 01:27:55,240
>> ROB: Poukisa se sa a konsèy 4 bytes?

1696
01:27:55,240 --> 01:27:58,500
Se konsa, gen yon pakèt antye
nan 0 a nan devan sa a.

1697
01:27:58,500 --> 01:28:03,740
Se konsa, li vrèman 0x0000000123.

1698
01:28:03,740 --> 01:28:06,510
Sou yon sistèm 64-ti jan, ta gen
yon pakèt antye nan plis zewo.

1699
01:28:06,510 --> 01:28:11,410

1700
01:28:11,410 --> 01:28:11,900
Yeah?

1701
01:28:11,900 --> 01:28:13,150
>> ODYANS: [fèbl].

1702
01:28:13,150 --> 01:28:17,290

1703
01:28:17,290 --> 01:28:21,130
>> ROB: Se konsa, printf nan premye
ki pral print--

1704
01:28:21,130 --> 01:28:21,980
>> ODYANS: [fèbl].

1705
01:28:21,980 --> 01:28:24,420
>> ROB: Wi, li k ap pase yo enprime
sa x ap montre yo.

1706
01:28:24,420 --> 01:28:27,030

1707
01:28:27,030 --> 01:28:29,070
Star di ki sa ki sa a
bagay lonje dwèt yo.

1708
01:28:29,070 --> 01:28:30,300
Gen tan pwan li.

1709
01:28:30,300 --> 01:28:31,455
Se konsa, sa se li lonje dwèt nan?

1710
01:28:31,455 --> 01:28:31,850
50.

1711
01:28:31,850 --> 01:28:32,410
Gen tan pwan li.

1712
01:28:32,410 --> 01:28:33,390
Sa a ki sa nou ap ale nan enprime.

1713
01:28:33,390 --> 01:28:37,020
Lè nou konsidere ke, youn nan pwochen, nou ap
jis enprime x tèt li.

1714
01:28:37,020 --> 01:28:38,850
Ki sa ki andedan nan f?

1715
01:28:38,850 --> 01:28:43,710
0x123.

1716
01:28:43,710 --> 01:28:44,500
OK.

1717
01:28:44,500 --> 01:28:46,620
>> Lè sa a,, finalman, nou gen gratis la.

1718
01:28:46,620 --> 01:28:48,040
Ki sa yo nou pase yo gratis?

1719
01:28:48,040 --> 01:28:49,470
Nou ap pase x.

1720
01:28:49,470 --> 01:28:52,380
Tan sa a mwen aktyèlman parèt
li nan ankadreman an pil.

1721
01:28:52,380 --> 01:28:56,370
>> Se konsa, nou ap pase valè a
0x123 yo gratis.

1722
01:28:56,370 --> 01:28:59,070
Se konsa, kounye a gratis konnen, tout dwa,
Mwen gen yo ale jiska pil wòch la

1723
01:28:59,070 --> 01:29:00,050
ak gratis ki memwa.

1724
01:29:00,050 --> 01:29:03,920
Li nan pa gen okenn ankò lè l sèvi avèk sa ki
se nan adrès 0x123.

1725
01:29:03,920 --> 01:29:07,010
>> Se konsa, gratis ki pral lage
ki soti nan pil wòch la.

1726
01:29:07,010 --> 01:29:09,490
Koulye a, pil wòch nou an, se vid ankò.

1727
01:29:09,490 --> 01:29:11,120
Nou pa gen okenn fwit memwa.

1728
01:29:11,120 --> 01:29:12,940
Kounye a gratis pral retounen.

1729
01:29:12,940 --> 01:29:16,130
Remake x se toujou 0x123.

1730
01:29:16,130 --> 01:29:18,240
Men sa se kounye a pa memwa ki valid.

1731
01:29:18,240 --> 01:29:21,220

1732
01:29:21,220 --> 01:29:23,986
Nou ta dwe pa gen okenn ankò dèreferans x.

1733
01:29:23,986 --> 01:29:24,440
Yeah?

1734
01:29:24,440 --> 01:29:27,240
>> ODYANS: Èske retounen 0 redondants?

1735
01:29:27,240 --> 01:29:28,290
>> ROB: Èske returen 0 redondants?

1736
01:29:28,290 --> 01:29:31,110
Wi.

1737
01:29:31,110 --> 01:29:33,950
Nou jis mete sa la, paske
nou gen yon retou youn pou lè.

1738
01:29:33,950 --> 01:29:36,830
Se konsa, li la tankou, yeah, pèmèt
gen ladan yo retounen nan 0.

1739
01:29:36,830 --> 01:29:37,310
Yeah?

1740
01:29:37,310 --> 01:29:38,560
>> ODYANS: [fèbl]?

1741
01:29:38,560 --> 01:29:42,110

1742
01:29:42,110 --> 01:29:45,580
>> ROB: Se konsa, apre x gratis, ki sa k ap pase si
nou eseye dèreferans konsèy la?

1743
01:29:45,580 --> 01:29:47,240
Li posib ke pa gen anyen ale mal.

1744
01:29:47,240 --> 01:29:49,330
Li posib ke nou pral toujou jwenn 50.

1745
01:29:49,330 --> 01:29:53,590
>> Li posib, tou, ki ki memwa se
kounye a yo te itilize pou yon lòt bagay.

1746
01:29:53,590 --> 01:29:57,140
Se konsa, li konpòtman endefini.

1747
01:29:57,140 --> 01:30:00,772
Epi endefini vle di anyen
ka rive.

1748
01:30:00,772 --> 01:30:01,250
Yeah?

1749
01:30:01,250 --> 01:30:02,500
>> ODYANS: [fèbl]?

1750
01:30:02,500 --> 01:30:07,942

1751
01:30:07,942 --> 01:30:10,830
>> ROB: Non, kidonk si w bay
x yon lòt bagay.

1752
01:30:10,830 --> 01:30:15,870
Se konsa, si dwa isit la nou te di x egal
malok yon bagay else--

1753
01:30:15,870 --> 01:30:17,100
malok gwosè event--

1754
01:30:17,100 --> 01:30:20,180
Lè sa a, ki blòk orijinal
nan memwa se pa sa libere.

1755
01:30:20,180 --> 01:30:21,490
Epi nou te ofisyèlman pèdi li.

1756
01:30:21,490 --> 01:30:23,150
Sa se yon fwit memwa.

1757
01:30:23,150 --> 01:30:25,090
Nou te pèdi tout referans
ak sa yo ki blòk nan memwa.

1758
01:30:25,090 --> 01:30:26,827
Se konsa, gen nan pa gen fason nou ka tout tan tout tan libere li.

1759
01:30:26,827 --> 01:30:32,074

1760
01:30:32,074 --> 01:30:36,630
OK, se konsa Lè sa a, retounen 0 vle di fè.

1761
01:30:36,630 --> 01:30:37,900
>> Tout dwa, kidonk pil debòde.

1762
01:30:37,900 --> 01:30:39,320
Ki sa ki nan lide nan isit la?

1763
01:30:39,320 --> 01:30:41,210
Se konsa, sonje, pil wòch ki pral desann.

1764
01:30:41,210 --> 01:30:43,480
Stack ap moute.

1765
01:30:43,480 --> 01:30:48,000
Se konsa, sa a te egzanp ki soti nan konferans,
Mwen panse ke, kote prensipal se jis ale nan

1766
01:30:48,000 --> 01:30:51,380
rele sa a foo fonksyon, ki se ale
yo rele tèt li recursive sou yo ak

1767
01:30:51,380 --> 01:30:52,320
sou ankò.

1768
01:30:52,320 --> 01:30:55,370
>> Se konsa, chemine ankadreman yo ale nan
travay egzakteman menm bagay la.

1769
01:30:55,370 --> 01:30:58,130
Se konsa, nou ap ale nan kòmanse avèk prensipal
kòm pati anba ankadreman an pil.

1770
01:30:58,130 --> 01:31:02,000
Lè sa a, prensipal ki pral rele foo, ki
ki pral jwenn yon ankadreman chemine.

1771
01:31:02,000 --> 01:31:04,260
>> Lè sa a, foo ki pral rele foo
ankò, ki se ale nan jwenn

1772
01:31:04,260 --> 01:31:05,500
yon lòt ankadreman chemine.

1773
01:31:05,500 --> 01:31:08,270
Lè sa a, ankò, e ankò, e ankò,
e ankò jiskaske, evantyèlman, nou kouri

1774
01:31:08,270 --> 01:31:09,190
nan pil wòch la.

1775
01:31:09,190 --> 01:31:11,990
Se konsa, sa a se ki jan nou jwenn
yon debòde chemine.

1776
01:31:11,990 --> 01:31:14,910
Ak nan pwen sa a, ou fòt segman.

1777
01:31:14,910 --> 01:31:17,335
Oswa ou ta reyèlman seg fòt anvan
pwen sa a, men wi.

1778
01:31:17,335 --> 01:31:19,660
>> ODYANS: se nwayo pil fatra a
menm jan fòt seg?

1779
01:31:19,660 --> 01:31:26,140
>> ROB: Se konsa ou pral wè segmentation
nwayo fòt jete.

1780
01:31:26,140 --> 01:31:28,760
Ou jwenn yon pil fatra nwayo lè
ou fòt segman.

1781
01:31:28,760 --> 01:31:32,580
Epi li a tankou yon pil fatra nan tout nan nan
sa nan memwa ou ye kounye a se konsa

1782
01:31:32,580 --> 01:31:36,670
ke ou ka eseye epi idantifye
poukisa ou seg rproche.

1783
01:31:36,670 --> 01:31:37,135
Yeah?

1784
01:31:37,135 --> 01:31:38,385
>> ODYANS: [fèbl]?

1785
01:31:38,385 --> 01:31:40,855

1786
01:31:40,855 --> 01:31:45,460
>> ROB: Se konsa, yon segmentation fòt vle di
gen nan yon debòde chemine.

1787
01:31:45,460 --> 01:31:47,060
Se konsa, pa nesesèman.

1788
01:31:47,060 --> 01:31:49,880
Yon fay segmentation vle di ke w ap
manyen memwa nan yon fason

1789
01:31:49,880 --> 01:31:50,880
ou pa ta dwe.

1790
01:31:50,880 --> 01:31:54,750
Se konsa, yon sèl fason pou ke kap pase se, lè
ou chemine debòde, nou kòmanse manyen

1791
01:31:54,750 --> 01:31:58,736
memwa nan yon fason ke nou pa ta dwe.

1792
01:31:58,736 --> 01:31:59,208
Yeah?

1793
01:31:59,208 --> 01:32:00,458
>> ODYANS: [fèbl]?

1794
01:32:00,458 --> 01:32:03,456

1795
01:32:03,456 --> 01:32:05,830
>> ROB: Se konsa andedan nan yon riban enfini.

1796
01:32:05,830 --> 01:32:08,770
Tankou, sa a se tankou yon enfini repetitif
bouk ak pou nou jwenn yon lòt

1797
01:32:08,770 --> 01:32:09,770
chemine ankadreman chak fwa.

1798
01:32:09,770 --> 01:32:13,540
Men, jis andedan nan yon regilye
enfini pandan y ap one--

1799
01:32:13,540 --> 01:32:16,390
byen, kite a pa menm enprime f--

1800
01:32:16,390 --> 01:32:17,040
fè yon bagay.

1801
01:32:17,040 --> 01:32:18,390
Kèlkeswa sa.

1802
01:32:18,390 --> 01:32:20,610
>> Nou pa pwal yo dwe resevwa
yon lòt ankadreman chemine.

1803
01:32:20,610 --> 01:32:22,530
Nou jis ap ale nan kenbe loupin
sou enstriksyon sa a yon sèl.

1804
01:32:22,530 --> 01:32:23,920
Chemine a se pa ap grandi.

1805
01:32:23,920 --> 01:32:27,290
Li nan lefèt ke chak repetitif
rele an, ap ban nou yon ankadreman chemine.

1806
01:32:27,290 --> 01:32:31,231
Se poutèt sa nou jwenn yon debòde chemine.

1807
01:32:31,231 --> 01:32:31,728
Yeah?

1808
01:32:31,728 --> 01:32:38,189
>> ODYANS: Se konsa, si ou te di yo ka resevwa nan
pandan y ap riban ak Lè sa a [fèbl]?

1809
01:32:38,189 --> 01:32:42,000
>> ROB: Se konsa, si andedan nan riban an pandan y ap
te gen yon printf, ou toujou ta

1810
01:32:42,000 --> 01:32:42,790
pa seg fay.

1811
01:32:42,790 --> 01:32:46,090
Mwen jis pa t 'vle konfonn bagay sa yo.

1812
01:32:46,090 --> 01:32:46,610
Li ta bouk.

1813
01:32:46,610 --> 01:32:48,225
Ou ta jwenn yon pil sèl
ankadreman pou printf la.

1814
01:32:48,225 --> 01:32:49,580
>> Lè sa a, printf ta retounen.

1815
01:32:49,580 --> 01:32:50,280
Lè sa a, ou ta bouk ankò.

1816
01:32:50,280 --> 01:32:51,460
Ou ta jwenn yon pil sèl
ankadreman pou printf la.

1817
01:32:51,460 --> 01:32:52,850
Li ta retounen.

1818
01:32:52,850 --> 01:32:54,060
Single chemine ankadreman.

1819
01:32:54,060 --> 01:33:00,215
Se konsa, ou pa ap vin enfini sa a
anpile ankadreman chemine.

1820
01:33:00,215 --> 01:33:03,185
>> ODYANS: [fèbl]?

1821
01:33:03,185 --> 01:33:04,040
>> ROB: Wi.

1822
01:33:04,040 --> 01:33:09,360
Se konsa, sa debòde chemine k ap pase
paske Pa gen yonn nan sa yo

1823
01:33:09,360 --> 01:33:11,600
rele nan zòrèy foo ap retounen.

1824
01:33:11,600 --> 01:33:15,250
Se konsa, si nou retounen, lè sa a nou ta
kòmanse pèdi ankadreman chemine.

1825
01:33:15,250 --> 01:33:17,870
Lè sa a, nou pa ta chemine debòde.

1826
01:33:17,870 --> 01:33:20,070
Epi sa a, poukisa ou bezwen yon ka baz
pou fonksyon pèsonèl ou.

1827
01:33:20,070 --> 01:33:22,992

1828
01:33:22,992 --> 01:33:23,479
Yeah?

1829
01:33:23,479 --> 01:33:27,375
>> ODYANS: Èske gwosè a potansyèl ak nan
chemine pou pil wòch la menm bagay la pou

1830
01:33:27,375 --> 01:33:29,880
tout pwogram?

1831
01:33:29,880 --> 01:33:31,910
>> ROB: Apeprè.

1832
01:33:31,910 --> 01:33:35,090
Se gwosè a potansyèl nan chemine a ak
pil wòch la menm bagay la tou pou tout pwogram?

1833
01:33:35,090 --> 01:33:37,180
Apeprè.

1834
01:33:37,180 --> 01:33:40,080
Gen kèk Metòd chans
ki kote chemine a kòmanse ak

1835
01:33:40,080 --> 01:33:42,400
ki kote pil wòch la kòmanse.

1836
01:33:42,400 --> 01:33:45,870
Si ou rive gen yon lot antye nan
varyab mondyal ak bagay sa yo, ou ta ka

1837
01:33:45,870 --> 01:33:49,520
pran lwen kèk espas
pou pil wòch ou.

1838
01:33:49,520 --> 01:33:54,060
>> Sou yon sistèm 64-ti jan, ou nòmalman
gen enfini memwa.

1839
01:33:54,060 --> 01:33:55,820
Genyen sèlman anpil.

1840
01:33:55,820 --> 01:33:59,250
Ant 32 Bits ak 64 Bits, ki
yon diferans enpòtan.

1841
01:33:59,250 --> 01:34:02,350
>> W ap ale nan jwenn yon anpil antye plis
chemine ak espas pil wòch sou yon 64-ti jan

1842
01:34:02,350 --> 01:34:05,810
sistèm paske gen nan jis plis
adrese yo ke yo ka itilize.

1843
01:34:05,810 --> 01:34:09,360
Men, sou yon sistèm endividyèl, li pral
gen apeprè menm kantite lajan an nan chemine

1844
01:34:09,360 --> 01:34:10,785
ak pil wòch espas.

1845
01:34:10,785 --> 01:34:13,635

1846
01:34:13,635 --> 01:34:15,530
Tout dwa.

1847
01:34:15,530 --> 01:34:18,220
>> Se konsa, bagay pase a se konpilasyon.

1848
01:34:18,220 --> 01:34:19,810
Se konsa, ou ta dwe konnen pwosesis sa a.

1849
01:34:19,810 --> 01:34:22,240
Genyen kat etap gwo.

1850
01:34:22,240 --> 01:34:24,400
Se konsa, youn nan premye yo ta dwe
dwe fasil a sonje.

1851
01:34:24,400 --> 01:34:25,085
Pre-pwosesis.

1852
01:34:25,085 --> 01:34:28,390
Li te gen prefiks nan pre nan li.

1853
01:34:28,390 --> 01:34:32,080
Se konsa, li vini anvan tout lòt bagay.

1854
01:34:32,080 --> 01:34:34,000
>> Bagay la sonje se regle la.

1855
01:34:34,000 --> 01:34:37,250
Se konsa, regle defini ak regle an gen ladan
nan tout sa yo.

1856
01:34:37,250 --> 01:34:39,560
Moun sa yo ki, yo tout pre-processeur
direktiv.

1857
01:34:39,560 --> 01:34:42,030
Sa yo se bagay sa yo yo ki
pre-processeur pran swen nan.

1858
01:34:42,030 --> 01:34:43,680
>> Se konsa, sa yon-processeur pre fè?

1859
01:34:43,680 --> 01:34:44,850
Li se yon bagay vrèman bèbè.

1860
01:34:44,850 --> 01:34:49,380
Tout li a kapab nan yo se tout moun sa yo
kopi, e li te koupe, ak keratin operasyon yo.

1861
01:34:49,380 --> 01:34:51,790
>> Se konsa, regle an gen ladan estanda h i0 dot.

1862
01:34:51,790 --> 01:34:52,990
Ki sa ki se ke ap fè?

1863
01:34:52,990 --> 01:34:56,610
Li nan arachman estanda i0 dot h nan
ranpli e kole l 'nan tèt la

1864
01:34:56,610 --> 01:34:58,960
tout kote li di regle an gen ladan
estanda i0 dot h.

1865
01:34:58,960 --> 01:35:02,480
>> Ak nenpòt ki regle defini ki nou te
wè, ki sa ki ki ap fè?

1866
01:35:02,480 --> 01:35:06,730
Li kopye valè a ki regle nan
defini se defini kòm ak kole ki

1867
01:35:06,730 --> 01:35:08,500
tout kote w ap itilize valè an.

1868
01:35:08,500 --> 01:35:13,400
Se konsa, preproseseur la jis fè sa ki reyèlman
tèks ki senp ki baze operasyon yo.

1869
01:35:13,400 --> 01:35:15,870
Li fè sa ki pa gen anyen entelijan.

1870
01:35:15,870 --> 01:35:18,920
Se konsa, tout lòt bagay se
pi plis konplike.

1871
01:35:18,920 --> 01:35:22,970
>> Se konsa, kounye a ke preproseseur se
fè, nou aktyèlman konpile.

1872
01:35:22,970 --> 01:35:24,320
Se konsa, sa konpile vle di?

1873
01:35:24,320 --> 01:35:27,310
Nou ap kounye a pral nan kòd c
Kòd asanble.

1874
01:35:27,310 --> 01:35:27,570
Yeah?

1875
01:35:27,570 --> 01:35:28,820
>> ODYANS: [fèbl]?

1876
01:35:28,820 --> 01:35:32,390

1877
01:35:32,390 --> 01:35:34,220
>> ROB: Yeah, nou kenbe sa.

1878
01:35:34,220 --> 01:35:36,880

1879
01:35:36,880 --> 01:35:38,660
Se konsa, konpile.

1880
01:35:38,660 --> 01:35:40,310
Nou pwal soti nan C rive nan asanble.

1881
01:35:40,310 --> 01:35:42,470
Se konsa, sa a se yon chanjman lang vrè.

1882
01:35:42,470 --> 01:35:45,240
Konpile tèt li vle di pral soti nan
yon pi wo nivo nan lang

1883
01:35:45,240 --> 01:35:47,340
yon pi ba lang nivo.

1884
01:35:47,340 --> 01:35:50,720
>> Epi c se yon lang wo nivo
konpare ak asanble.

1885
01:35:50,720 --> 01:35:52,320
Ki sa ki se tout pèp?

1886
01:35:52,320 --> 01:35:56,440
Enstriksyon li yo ki, bèl
anpil, te fè pou CPU ou.

1887
01:35:56,440 --> 01:35:59,130
Men, òdinatè w lan toujou fè
pa konprann asanble.

1888
01:35:59,130 --> 01:36:01,570
Li sèlman konprann yo menm ak zewo.

1889
01:36:01,570 --> 01:36:06,160
Se konsa, pwochen etap la se rasanble, ki
pote nou soti nan enstriksyon sa yo ki

1890
01:36:06,160 --> 01:36:08,760
CPU ou a konprann ak aktyèlman
tradui yo, yo

1891
01:36:08,760 --> 01:36:10,820
yo menm ki ak zewo.

1892
01:36:10,820 --> 01:36:13,570
>> Se konsa, C rive nan asanble binè.

1893
01:36:13,570 --> 01:36:15,870
Men, mwen pa gen yon ègzèkutabl ankò.

1894
01:36:15,870 --> 01:36:19,550
Se konsa, panse nan bibliyotèk la cs50.

1895
01:36:19,550 --> 01:36:23,070
Nou te founi ou ak yon binè pou
sa a bibliyotèk cs50, ki te gen GetString

1896
01:36:23,070 --> 01:36:24,400
ak GetInt ak tout sa ki.

1897
01:36:24,400 --> 01:36:25,700
>> Men, cs50 bibliyotèk la

1898
01:36:25,700 --> 01:36:27,650
nan ak tèt li se pa ègzèkutabl.

1899
01:36:27,650 --> 01:36:29,570
Li pa gen yon fonksyon prensipal.

1900
01:36:29,570 --> 01:36:32,230
Se jis yon pakèt moun sou binè
ke ou ka itilize.

1901
01:36:32,230 --> 01:36:41,730
Se konsa, ki lye ak se ki jan nou pote ansanm tout
nan sa yo diferan dosye binè

1902
01:36:41,730 --> 01:36:43,110
nan yon ègzèkutabl vrè.

1903
01:36:43,110 --> 01:36:45,900
Youn ki ou ka tape
dot koupe yon dot deyò.

1904
01:36:45,900 --> 01:36:51,660
>> Se konsa, sa a se tankou dosye a ke ou
te ekri, - kèlkeswa pwogram ou an is--

1905
01:36:51,660 --> 01:36:53,620
Ceaser dot c.

1906
01:36:53,620 --> 01:36:55,100
Men koulye a, li a te konpile
desann nan binè.

1907
01:36:55,100 --> 01:36:56,480
Se konsa, Ceaser dot o.

1908
01:36:56,480 --> 01:36:59,620
Lè sa a se cs50 nou an bibliyotèk binè.

1909
01:36:59,620 --> 01:37:02,284
Apre sa, yo se ke yo te konbine
nan yon ègzèkutabl sèl.

1910
01:37:02,284 --> 01:37:02,758
Yeah?

1911
01:37:02,758 --> 01:37:04,008
>> ODYANS: [fèbl]?

1912
01:37:04,008 --> 01:37:08,800

1913
01:37:08,800 --> 01:37:12,710
>> ROB: Se konsa, premye enkli ladan yo, sonje,
regle an gen ladan se aktyèlman yon

1914
01:37:12,710 --> 01:37:13,810
etap pre-processeur.

1915
01:37:13,810 --> 01:37:14,750
Men, sa a ki apa a.

1916
01:37:14,750 --> 01:37:20,730
Si ou pa ap lè l sèvi avèk nenpòt ki fonksyon ki
yo deyò nan dosye sèl ou Lè sa a,

1917
01:37:20,730 --> 01:37:26,100
pa gen okenn, ou pa bezwen fè rapò ant anyen
depi ou gen tout bagay.

1918
01:37:26,100 --> 01:37:30,310
>> Se Sa te di, printf ke yo te lye nan.

1919
01:37:30,310 --> 01:37:32,820
Si ou janm sèvi ak printf, ki nan yon bagay
ki bezwen yo dwe lye nan

1920
01:37:32,820 --> 01:37:35,740
paske ou pa t 'ekri sa.

1921
01:37:35,740 --> 01:37:39,530
Epi, an reyalite, printf se otomatikman
lye nan.

1922
01:37:39,530 --> 01:37:42,760
Ou konnen ki jan nan liy lan lòd oswa lè
ou tape fè, ou wè li gen

1923
01:37:42,760 --> 01:37:46,690
priz l cs50, ki te gen lyen
nan bibliyotèk la cs50?

1924
01:37:46,690 --> 01:37:49,070
Printf, ak lòt bagay tankou sa yo, ki pral
yo dwe lye nan otomatikman.

1925
01:37:49,070 --> 01:37:51,730

1926
01:37:51,730 --> 01:37:53,930
Nenpòt lòt kesyon sou anyen?

1927
01:37:53,930 --> 01:37:56,280
>> ODYANS: [fèbl]?

1928
01:37:56,280 --> 01:37:58,300
>> ROB: Ki lye ak?

1929
01:37:58,300 --> 01:38:03,450
Nou gen yon pakèt antye nan
diferan dosye binè.

1930
01:38:03,450 --> 01:38:06,410
Sa a se egzanp nan kanonyal
ke nou itilize se bibliyotèk cs50.

1931
01:38:06,410 --> 01:38:09,960
Nou te konpile ak ba ou a
binè pou sa a bibliyotèk cs50.

1932
01:38:09,960 --> 01:38:12,410
>> Ou vle sèvi ak GetString
nan pwogram ou an.

1933
01:38:12,410 --> 01:38:14,750
Se konsa, ou ale epi sèvi ak GetString.

1934
01:38:14,750 --> 01:38:19,700
Men, san Kòd binè mwen an pou
GetString, lè ou konpile kòd ou a

1935
01:38:19,700 --> 01:38:23,140
desann, ou pa ka aktyèlman kouri ou
pwogram paske GetString chèn se

1936
01:38:23,140 --> 01:38:25,080
pa ankò konplètman defini.

1937
01:38:25,080 --> 01:38:29,220
>> Li nan sèlman lè ou konekte nan binè mwen
ki gen GetString ke kounye a, tout

1938
01:38:29,220 --> 01:38:31,130
dwat, mwen ka aktyèlman
egzekite GetString.

1939
01:38:31,130 --> 01:38:32,330
Dosye mwen an se konplè.

1940
01:38:32,330 --> 01:38:34,208
Apre sa, mwen ka kouri sa a.

1941
01:38:34,208 --> 01:38:34,697
Yeah?

1942
01:38:34,697 --> 01:38:37,631
>> ODYANS: Koneksyon konvèti
binè a ègzèkutabl?

1943
01:38:37,631 --> 01:38:42,032
Se konsa, menm si ou pa gen lòt
bibliyotèk, pa ta li toujou gen

1944
01:38:42,032 --> 01:38:44,477
nesesè yo tradui
[fèbl la]?

1945
01:38:44,477 --> 01:38:48,640
>> ROB: Se konsa yon ègzèkutabl
se toujou nan binè.

1946
01:38:48,640 --> 01:38:51,750
Li nan jis konbine yon antye
pakèt moun sou binèr.

1947
01:38:51,750 --> 01:38:55,124

1948
01:38:55,124 --> 01:38:56,591
>> ODYANS: Mèsi anpil.

1949
01:38:56,591 --> 01:38:58,560
>> ROB: Pa gen pwoblèm.

1950
01:38:58,560 --> 01:38:59,540
Nenpòt lòt kesyon?

1951
01:38:59,540 --> 01:39:02,001
Sinon, nou tout ap mete.

1952
01:39:02,001 --> 01:39:02,690
Tout dwa.

1953
01:39:02,690 --> 01:39:02,990
Mèsi.

1954
01:39:02,990 --> 01:39:03,590
>> [Aplodisman]

1955
01:39:03,590 --> 01:39:04,490
>> ODYANS: Mèsi poutèt ou.

1956
01:39:04,490 --> 01:39:05,740
>> ROB: Yeah.

1957
01:39:05,740 --> 01:39:06,582