1
00:00:00,000 --> 00:00:07,700

2
00:00:07,700 --> 00:00:15,180
>> SPEAKER: OK, hekk, inti mhux ser jemmnu dan,
iżda aħħar ġimgħa, nhar it-Tnejn, fil Pierce, I

3
00:00:15,180 --> 00:00:16,090
kien fl-kantina.

4
00:00:16,090 --> 00:00:17,010
I qatt ma jmurx lil Pierce.

5
00:00:17,010 --> 00:00:20,530
U jien qatt ma jmorru lura mill-ġdid, minħabba li
I xellug Jittieħed tiegħi waħdu għal,

6
00:00:20,530 --> 00:00:23,950
simili, ħames minuti u xi ħadd
seraq kompjuter tiegħi u tiegħi

7
00:00:23,950 --> 00:00:26,050
phone out ta 'backpack tiegħi.

8
00:00:26,050 --> 00:00:28,780
Li jfisser I ltqajna lura, u
imbagħad inqas minn ġimgħa wara

9
00:00:28,780 --> 00:00:30,220
li ltqajna misruqa mill-ġdid.

10
00:00:30,220 --> 00:00:31,570
>> U allura ltqajna mixgħula -

11
00:00:31,570 --> 00:00:34,540
Sib iPhone tiegħi tkompli
li jkun jgħinx.

12
00:00:34,540 --> 00:00:37,340
So I tkompli tħeġġeġ
inti ma tużah.

13
00:00:37,340 --> 00:00:42,270
Hija mixgħula darba, u kien fil MIT,
bħal 15-il minuta aktar tard, u l-persuna

14
00:00:42,270 --> 00:00:45,770
sejjaħ dan in-numru tat-telefon li wera
fil AT & T sejħa log tiegħi.

15
00:00:45,770 --> 00:00:48,830
>> So I marru online, imsejħa li phone
numru, u marru dritti għal dan

16
00:00:48,830 --> 00:00:50,540
jwieġeb magna fil-lingwa Spanjola.

17
00:00:50,540 --> 00:00:52,520
U jien ma semgħu dan peress.

18
00:00:52,520 --> 00:00:54,800
So I kellha tikseb ġdida
kompjuter u telefon.

19
00:00:54,800 --> 00:00:55,150
I know.

20
00:00:55,150 --> 00:00:56,326
Yeah.

21
00:00:56,326 --> 00:01:00,110
Iżda jekk inti guys tixtieq li ċippa in to my
fond tal-kompjuter wara dan, hu għalhekk

22
00:01:00,110 --> 00:01:01,030
Stajt talab inti hawn.

23
00:01:01,030 --> 00:01:02,280
Just kidding.

24
00:01:02,280 --> 00:01:04,239

25
00:01:04,239 --> 00:01:07,420
Iżda dan kien verament diqa u trawmatika.

26
00:01:07,420 --> 00:01:10,700
>> Imma dan kollu lura issa, u li kien għalhekk
il-p sett 8 ħa sakemm, minħabba

27
00:01:10,700 --> 00:01:12,480
I ma jkollhom kompjuter.

28
00:01:12,480 --> 00:01:13,730
U xi ħadd seraq.

29
00:01:13,730 --> 00:01:16,940
And I emailed, tistaqsi jekk dawn
kieku grad p sett 8 tiegħek.

30
00:01:16,940 --> 00:01:18,790
Iżda huma qal le.

31
00:01:18,790 --> 00:01:20,000
And I kien simili, jista 'jkolli
kompjuter tiegħi lura?

32
00:01:20,000 --> 00:01:21,270
U dawn qed simili, l-ebda.

33
00:01:21,270 --> 00:01:22,130
Just kidding.

34
00:01:22,130 --> 00:01:22,930
>> OK.

35
00:01:22,930 --> 00:01:28,140
Dan huwa it-taqsima finali tagħna, u jien
koppja ta '- aħna biss tliet

36
00:01:28,140 --> 00:01:29,790
affarijiet fuq l-aġenda.

37
00:01:29,790 --> 00:01:31,330
Aħna qed tmur biex jitkellmu daqsxejn
dwar il-gwida Q.

38
00:01:31,330 --> 00:01:33,900
Imbagħad aħna qed tmur biex jonfqu 15
minuta fuq demo jibred.

39
00:01:33,900 --> 00:01:36,890
Imbagħad aħna qed tmur biex kollha jgħidu
addiju għal xulxin.

40
00:01:36,890 --> 00:01:41,460
Inti ma verament bżonn kompjuters tiegħek
jew pinna jew karta li jieħdu noti, jew

41
00:01:41,460 --> 00:01:42,410
isegwu flimkien.

42
00:01:42,410 --> 00:01:45,620
So I jassumi jekk ikollok kompjuter tiegħek
up, allura int fuq Facebook.

43
00:01:45,620 --> 00:01:46,530
Just qal.

44
00:01:46,530 --> 00:01:49,650
Sakemm int timla l-
Gwida Q, li hija l-ewwel.

45
00:01:49,650 --> 00:01:50,690
>> Il-gwida Q hija miftuħa.

46
00:01:50,690 --> 00:01:53,520
You kellna email dwar dan.

47
00:01:53,520 --> 00:01:56,930
Ladarba l-għalf Q tiġi sottomessa
tmiem is-sena, I nikseb kollha tal-

48
00:01:56,930 --> 00:02:03,710
Kummenti Q fil-punteġġi minn kulħadd
li jagħżel li tagħti me feedback.

49
00:02:03,710 --> 00:02:04,810
U hekk meta tmur fil-Q -

50
00:02:04,810 --> 00:02:07,440
I do not know jekk inti tista 'tagħmel dan, Jeff,
għax int u student estensjoni.

51
00:02:07,440 --> 00:02:12,730
Imma meta tmur fil-Q, jekk inti ma jkunux
sar qabel, inti pick tiegħek

52
00:02:12,730 --> 00:02:14,020
għalliem, li huwa David Malan.

53
00:02:14,020 --> 00:02:14,970
Inti għandek tagħmel lilu.

54
00:02:14,970 --> 00:02:15,690
>> U allura inti tista 'pick TFS.

55
00:02:15,690 --> 00:02:17,750
U inti tista 'pick kemm
TFS kif tixtieq.

56
00:02:17,750 --> 00:02:18,990
Iżda hemm 60 minna.

57
00:02:18,990 --> 00:02:20,350
Inti ma għandekx pick kulħadd.

58
00:02:20,350 --> 00:02:23,090
Tista 'biss pick me, jew biss pick
koppja nies oħra, jekk trid, li

59
00:02:23,090 --> 00:02:24,470
jagħtuhom feedback ukoll.

60
00:02:24,470 --> 00:02:27,595
U mbagħad ikollok punteġġi fuq dawn kollha
assi differenti, u allura inti tista 'tħalli

61
00:02:27,595 --> 00:02:28,570
feedback.

62
00:02:28,570 --> 00:02:31,520
>> U mbagħad, bħal xahar wara,
I ser tingħata dak kollu li feedback.

63
00:02:31,520 --> 00:02:34,570
U bħall-feedback inti kont qed
tajtu lili matul il-semestru, I

64
00:02:34,570 --> 00:02:35,790
taqra kollha ta 'dak.

65
00:02:35,790 --> 00:02:39,620
U huwa verament utli, u dan jgħin
me jikbru bħala għalliem u bħala

66
00:02:39,620 --> 00:02:40,680
individwali.

67
00:02:40,680 --> 00:02:43,360
Allura, jekk jogħġbok, jieħdu xi żmien biex tagħmel dan.

68
00:02:43,360 --> 00:02:45,020
Aħna biss se jkun hawn
għal, simili, 30 minuta.

69
00:02:45,020 --> 00:02:48,090
Mela jekk inti tixtieq, fl-aħħar ta 'dan, li
tieħu ħames minuti, u biss jimlew

70
00:02:48,090 --> 00:02:49,960
il-Q, għaliex ma tieħu
kwalunkwe aktar żmien minn dik.

71
00:02:49,960 --> 00:02:53,410
Dan ikun isbaħ, u inti wkoll
jiksbu gradi tiegħek lura aktar malajr jekk

72
00:02:53,410 --> 00:02:54,620
inti timla l-Q.

73
00:02:54,620 --> 00:02:56,580
>> Allura ħafna minnkom għamlu dan qabel -

74
00:02:56,580 --> 00:02:58,240
jew l-ebda, madwar nofs tal inti
għamlu dan qabel.

75
00:02:58,240 --> 00:03:00,060
Imma jekk int freshman,
dan huwa dak li hu.

76
00:03:00,060 --> 00:03:01,910
Dan ser ikun l-istess għall-klassijiet kollha.

77
00:03:01,910 --> 00:03:02,270
Tagħmel dan.

78
00:03:02,270 --> 00:03:02,900
Huwa jieħu ħames minuti.

79
00:03:02,900 --> 00:03:07,610
Iżda wkoll, jekk inti tagħmel dan daqsxejn serjament,
li mhux l-agħar ħaġa

80
00:03:07,610 --> 00:03:10,270
fid-dinja, minħabba I ċertament
teħodha bis-serjetà.

81
00:03:10,270 --> 00:03:13,000
>> Mela jekk inti tħalli me wiċċ smiley,
I se japprezzaw dan.

82
00:03:13,000 --> 00:03:17,550
Iżda nixtieq ukoll japprezzaw jekk inti
telqu lili aktar minn wiċċ smiley.

83
00:03:17,550 --> 00:03:18,270
Iżda huwa sa inti.

84
00:03:18,270 --> 00:03:21,540
I ma jista 'jgħidlek - jew tixtieq smiley big
jiffaċċjaw, bi kapital D. Dik d

85
00:03:21,540 --> 00:03:23,060
jkun saħansitra aħjar.

86
00:03:23,060 --> 00:03:27,860
>> OK, li kollox għandi għall-Q. Jekk inti
xi mistoqsijiet, tista 'titlob

87
00:03:27,860 --> 00:03:29,370
me, iżda ta 'spjegazzjoni pretty.

88
00:03:29,370 --> 00:03:31,090
Just, jekk jogħġbok, imla out.

89
00:03:31,090 --> 00:03:34,390
Nixtieq verament japprezzaw dan,
u dan ifisser ħafna għalija.

90
00:03:34,390 --> 00:03:38,910
>> OK, dan huwa dak li aħna qed tmur biex jonfqu
15 minuta għaddejjin.

91
00:03:38,910 --> 00:03:39,800
Jien ser nuruk xi kodiċi.

92
00:03:39,800 --> 00:03:42,080
Naħseb li dan huwa verament jibred,
u dan ltqajna me aktar

93
00:03:42,080 --> 00:03:43,810
eċċitati fix-xjenza tal-kompjuter.

94
00:03:43,810 --> 00:03:46,480
So I hope li se tagħmel l-
istess għall inti kollha.

95
00:03:46,480 --> 00:03:51,760
>> Aħna ser jiftħu - u dan kollu
kodiċi I ser jibgħat għalik aktar tard.

96
00:03:51,760 --> 00:03:52,680
Iżda aħna qed biss ser tiftaħ up -

97
00:03:52,680 --> 00:03:54,310
Jien fil terminal tiegħi -

98
00:03:54,310 --> 00:03:56,810
aħna qed tmur biex il-programm jinfetaħ
imsejjaħ [? MySum. ?]

99
00:03:56,810 --> 00:04:01,290

100
00:04:01,290 --> 00:04:02,540
>> Jista kulħadd jaqra li, jew
għandi jagħmilha akbar?

101
00:04:02,540 --> 00:04:07,670

102
00:04:07,670 --> 00:04:13,040
Jista 'xi ħadd tell me dak li dan il-kodiċi se
tagħmel meta I run, jew dak li din

103
00:04:13,040 --> 00:04:14,320
programm se tagħmel meta I run?

104
00:04:14,320 --> 00:04:30,710

105
00:04:30,710 --> 00:04:32,400
>> [? Avi,?] X'taħseb
li għaddej biex tagħmel?

106
00:04:32,400 --> 00:04:33,335
Chewing Finish.

107
00:04:33,335 --> 00:04:35,033
Inti m'għandekx jitkellmu ma
ħalqek miftuħ.

108
00:04:35,033 --> 00:04:38,330

109
00:04:38,330 --> 00:04:42,860
>> UDJENZA: Ma tieħu mazz ta '
argumenti, isibu somma minnhom jirritornaw

110
00:04:42,860 --> 00:04:45,285
somma, u mbagħad ipprintjaha?

111
00:04:45,285 --> 00:04:53,045
Jew hija tieħu żewġ argumenti, u
allura ma [inaudible].

112
00:04:53,045 --> 00:04:56,460
U allura tistampa kwalunkwe
ir-riżultati huma.

113
00:04:56,460 --> 00:04:58,100
>> SPEAKER: Agħlaq, verament qrib.

114
00:04:58,100 --> 00:04:59,840
Kulmin tixtieq iżżid li
[? dak Avi?] qal?

115
00:04:59,840 --> 00:05:04,830

116
00:05:04,830 --> 00:05:07,293
Do ikollok bżonn tagħti dan il-programm
argumenti kmand tal-linja?

117
00:05:07,293 --> 00:05:09,145
>> UDJENZA: Le

118
00:05:09,145 --> 00:05:09,610
>> SPEAKER: Le

119
00:05:09,610 --> 00:05:11,250
X'jiġri jekk inti ma tagħtiha
argumenti kmand tal-linja?

120
00:05:11,250 --> 00:05:12,500
I biss jiktbu MySum dot slash.

121
00:05:12,500 --> 00:05:15,145

122
00:05:15,145 --> 00:05:16,630
>> UDJENZA: 1 plus 2 ugwali 3.

123
00:05:16,630 --> 00:05:17,250
>> SPEAKER: 1 plus 2 ugwali 3.

124
00:05:17,250 --> 00:05:18,570
U dan ser jistampaw li out.

125
00:05:18,570 --> 00:05:19,450
Dan huwa eżattament id-dritt.

126
00:05:19,450 --> 00:05:21,370
Tkun taf tara li print f
linja fil-qiegħ.

127
00:05:21,370 --> 00:05:23,450
Hija ser jistampa, b, u
allura s-somma ta 'u b.

128
00:05:23,450 --> 00:05:26,360
U I raden inti jassumi li
somma jaħdem b'mod korrett.

129
00:05:26,360 --> 00:05:28,120
Suppożizzjoni tajba.

130
00:05:28,120 --> 00:05:32,250
>> OK, u x'jiġri jekk I
tagħtiha liema argument?

131
00:05:32,250 --> 00:05:33,010
[? Manu? ?]

132
00:05:33,010 --> 00:05:36,230
>> UDJENZA: Hija ser żid kwalunkwe
l-ewwel argument huwa li b.

133
00:05:36,230 --> 00:05:37,150
Jew 2, sorry.

134
00:05:37,150 --> 00:05:38,480
>> SPEAKER: Dritt, għal 2.

135
00:05:38,480 --> 00:05:42,470
Ħadd ma jaf dak strtol ma?

136
00:05:42,470 --> 00:05:43,960
Huwa bażikament atoi.

137
00:05:43,960 --> 00:05:47,240
Atoi huwa attwalment verżjoni fancy ta '-

138
00:05:47,240 --> 00:05:49,600
jew verżjoni aktar sempliċi ta strtol.

139
00:05:49,600 --> 00:05:51,790
Iżda fil-fatt juża strtol.

140
00:05:51,790 --> 00:05:54,610

141
00:05:54,610 --> 00:05:58,010
U sibt li minn għaliex jien ridt
xi ħaġa simili atoi, u mbagħad meta I

142
00:05:58,010 --> 00:06:01,110
ma atoi, Naqra stabbiliti hawn.

143
00:06:01,110 --> 00:06:04,380
U sibt "din l-imġiba
huwa l-istess bħala "strtol.

144
00:06:04,380 --> 00:06:06,850
Allura huwa bażikament atoi għal
finijiet u effetti kollha.

145
00:06:06,850 --> 00:06:09,320
U tara I anki tuża null u 10.

146
00:06:09,320 --> 00:06:14,390
>> Dan fil-fatt ihallik tieħu string,
u jibdluh numru, u jagħżlu

147
00:06:14,390 --> 00:06:15,970
dak bażi inti tixtieq li tagħmel dan pulzieri

148
00:06:15,970 --> 00:06:17,370
Allura dan huwa bażi ta '10 dritt hawn.

149
00:06:17,370 --> 00:06:20,455
I seta 'jsir bażi tnejn għal informazzjoni,
bażi 16 għall hexadecimal.

150
00:06:20,455 --> 00:06:22,090
Huwa pretty jibred.

151
00:06:22,090 --> 00:06:25,860
Imma storja twila fil-qosor, dan jieħu żewġ
numri u żżid flimkien.

152
00:06:25,860 --> 00:06:29,260
>> Mela ejja run.

153
00:06:29,260 --> 00:06:32,560
U tkun taf ukoll avviż, hemm
huma xi affarijiet -

154
00:06:32,560 --> 00:06:37,830
so I jkollhom makefile dritt hawn, u
jekk inti tiftaħ dan up, xi affarijiet

155
00:06:37,830 --> 00:06:39,270
inti ser ikollok avviż huma differenti.

156
00:06:39,270 --> 00:06:42,370
B'mod partikolari, dan l-argument
dritt hawn, inti probabilment

157
00:06:42,370 --> 00:06:43,010
ma bbenefikawx dan qabel.

158
00:06:43,010 --> 00:06:45,770
Ġeneralment, aħna jiġbru l-affarijiet
ma 'sing żero, żero.

159
00:06:45,770 --> 00:06:51,500
Sing żero, żero, ifisser ma tagħmel
xi optimizations, kompilatur.

160
00:06:51,500 --> 00:06:54,950
Tippruvax u tagħmel xejn fancy, jew
jagħmlu xejn run aktar malajr, jew tikseb

161
00:06:54,950 --> 00:06:56,530
rid ta 'varjabbli li huma meħtieġa.

162
00:06:56,530 --> 00:06:58,080
Ma jottimizzaw dan il-kodiċi fil-livelli kollha,

163
00:06:58,080 --> 00:07:00,110
>> Jien tistaqsi għall-livell terzjarju
ottimizzazzjoni.

164
00:07:00,110 --> 00:07:02,580
Hekk jien tistaqsi kompilatur tagħmel
ħafna ta 'optimizations.

165
00:07:02,580 --> 00:07:05,870
Tista 'bidla li fil-makefile meta
ikollok dan il-kodiċi, jekk inti tixtieq

166
00:07:05,870 --> 00:07:07,190
biex tara Jittieħed differenti.

167
00:07:07,190 --> 00:07:08,660
Li aħna ser juru fit-tieni.

168
00:07:08,660 --> 00:07:12,080
Allura aħna run somma tiegħi 1 plus 2 plus 3.

169
00:07:12,080 --> 00:07:13,445
Xi ħadd jagħti me żewġ argumenti.

170
00:07:13,445 --> 00:07:17,221

171
00:07:17,221 --> 00:07:18,210
>> UDJENZA: 4 u 5.

172
00:07:18,210 --> 00:07:18,966
>> SPEAKER: 4 u 5.

173
00:07:18,966 --> 00:07:19,900
Grazzi.

174
00:07:19,900 --> 00:07:20,860
Great, hija taħdem.

175
00:07:20,860 --> 00:07:25,700
Liema huma xi argumenti oħra tajba
li jippruvaw, jagħmlu ċert li din taħdem?

176
00:07:25,700 --> 00:07:27,050
Kulħadd?

177
00:07:27,050 --> 00:07:27,430
>> UDJENZA: 0.

178
00:07:27,430 --> 00:07:29,210
>> SPEAKER: 0 u?

179
00:07:29,210 --> 00:07:31,010
>> UDJENZA: Negative 3.

180
00:07:31,010 --> 00:07:32,040
>> SPEAKER: Huwa jaħdem.

181
00:07:32,040 --> 00:07:33,670
Iżda dawk kienu għażliet tajba.

182
00:07:33,670 --> 00:07:36,600
OK, so ejja mmorru lura hawn.

183
00:07:36,600 --> 00:07:38,540
Dan huwa mysum.c.

184
00:07:38,540 --> 00:07:42,440
Int ser ikollok avviż hemm ukoll xi ħaġa
imsejħa sumfunction.c.

185
00:07:42,440 --> 00:07:48,110
U dan jgħid, oh, hemm xi ħaġa
definit fl sumfunction.c.

186
00:07:48,110 --> 00:07:51,480
I ma jinkludux dan il-fajl fil hawn
minħabba I m'għandhomx bżonn li.

187
00:07:51,480 --> 00:07:54,840
Imma I rabta li hija fil meta I jikkompilaw,
li inti innotata.

188
00:07:54,840 --> 00:07:57,380
>> Ejja iscroll.

189
00:07:57,380 --> 00:08:02,880
Rajna meta aħna kkompilata mysum, id-dritt
hemm, aħna marbuta fil-binarju minn

190
00:08:02,880 --> 00:08:04,130
sumfunction.o.

191
00:08:04,130 --> 00:08:05,780

192
00:08:05,780 --> 00:08:08,470
U jien ma bżonn l-fajl tal-header
minħabba li, naturalment, hemm il-

193
00:08:08,470 --> 00:08:09,240
dikjarazzjoni funzjoni.

194
00:08:09,240 --> 00:08:12,200
Allura sharp jinkludu normalment biss tpoġġi
f'dikjarazzjoni funzjoni.

195
00:08:12,200 --> 00:08:13,730
Hawnhekk stajt biss jitqiegħed dritta
fil-kodiċi.

196
00:08:13,730 --> 00:08:16,370
U so I bżonn tagħmel huwa link
fil-binarju, li nagħmel.

197
00:08:16,370 --> 00:08:19,950
>> Kwalunkwe guesses għal dak li huwa
fl sumfunction.c?

198
00:08:19,950 --> 00:08:21,950
What kodiċi stajt bil-miktub
fl sumfunction.c?

199
00:08:21,950 --> 00:08:25,445

200
00:08:25,445 --> 00:08:26,695
>> UDJENZA: [inaudible].

201
00:08:26,695 --> 00:08:29,460

202
00:08:29,460 --> 00:08:30,630
>> SPEAKER: Kwalunkwe guesses?

203
00:08:30,630 --> 00:08:30,940
Yeah?

204
00:08:30,940 --> 00:08:33,710
>> Udjenza: I think, jiddefinixxi
xi [inaudible].

205
00:08:33,710 --> 00:08:33,975
>> SPEAKER: Iva.

206
00:08:33,975 --> 00:08:37,650
So I do jiktbu somma int int a.

207
00:08:37,650 --> 00:08:41,120
Nikteb din il-linja, u mbagħad I jkollhom open
kaboċċi Brace, magħluqa kaboċċi Brace.

208
00:08:41,120 --> 00:08:46,160
What do you think I write ġewwa dawk
braces kaboċċi, ġewwa dik il-funzjoni?

209
00:08:46,160 --> 00:08:46,600
Yeah?

210
00:08:46,600 --> 00:08:48,150
>> UDJENZA: Return ugwali a.

211
00:08:48,150 --> 00:08:50,010
>> PROESSANT: Li raden verament tajba.

212
00:08:50,010 --> 00:08:51,720
Li jaħseb [? Manu?] Huwa dritt?

213
00:08:51,720 --> 00:08:54,122
Hija tgħid ritorn plus b.

214
00:08:54,122 --> 00:08:55,860
OK, ma jidhrux.

215
00:08:55,860 --> 00:08:56,520
[? Akshar,?]

216
00:08:56,520 --> 00:08:57,390
inti, wisq?

217
00:08:57,390 --> 00:09:00,430
Int żgur?

218
00:09:00,430 --> 00:09:01,680
OK.

219
00:09:01,680 --> 00:09:09,551

220
00:09:09,551 --> 00:09:10,050
What?

221
00:09:10,050 --> 00:09:11,662
>> UDJENZA: You spelt hija żbaljata.

222
00:09:11,662 --> 00:09:13,000
>> SPEAKER: Le, jien ma.

223
00:09:13,000 --> 00:09:13,966
Yeah, just kidding.

224
00:09:13,966 --> 00:09:15,300
Int dritt.

225
00:09:15,300 --> 00:09:15,930
Dan huwa eżattament dak li jgħid.

226
00:09:15,930 --> 00:09:17,110
Huwa jirritorna plus b.

227
00:09:17,110 --> 00:09:18,570
Li jagħmel ħafna sens.

228
00:09:18,570 --> 00:09:20,240
>> OK, ejja mmorru lura hawn.

229
00:09:20,240 --> 00:09:21,490
Naraw kif l-header -

230
00:09:21,490 --> 00:09:24,540

231
00:09:24,540 --> 00:09:25,660
dan huwa t-tip ta 'ritorn.

232
00:09:25,660 --> 00:09:29,100
Ftakar, Rajna li xi darba, il-
ritorn tip tal-funzjoni, iżda jmur

233
00:09:29,100 --> 00:09:30,160
qabel l-isem tal-funzjoni int.

234
00:09:30,160 --> 00:09:31,560
Hawnhekk, stajt int bil-miktub.

235
00:09:31,560 --> 00:09:35,680
X'taħseb li se jiġri jekk f'dan
funzjoni, I ma jiktbu int, imma

236
00:09:35,680 --> 00:09:38,270
I write mhux iffirmat?

237
00:09:38,270 --> 00:09:41,050
Id-differenza, naturalment, hija li
mhux iffirmat jirrappreżenta biss pożittiva

238
00:09:41,050 --> 00:09:43,620
interi, u int tista 'tkun
pożittiv jew negattiv.

239
00:09:43,620 --> 00:09:45,450
>> Hekk stajt biddel il-ritorn
tip ta 'din il-funzjoni.

240
00:09:45,450 --> 00:09:49,370
Dan il-kodiċi ma taqbilx
dan ir-ritorn tip hawnhekk.

241
00:09:49,370 --> 00:09:50,925
X'taħseb li se jiġri
meta I jikkompilaw?

242
00:09:50,925 --> 00:09:53,840

243
00:09:53,840 --> 00:09:56,240
Għandek Yell fil lili.

244
00:09:56,240 --> 00:09:57,700
Nru yelling.

245
00:09:57,700 --> 00:10:00,050
>> X'jiġri meta I run-programm?

246
00:10:00,050 --> 00:10:05,810
Ejja nagħmlu qabel 0 negattiv
3, jew negattivi 1.

247
00:10:05,810 --> 00:10:10,180
Għadu jaħdem, anki jekk jien qal
huwa jirritorna numru sħiħ mhux iffirmat.

248
00:10:10,180 --> 00:10:12,060
Ovvjament mhuwiex jirritornaw
integer mhux iffirmat.

249
00:10:12,060 --> 00:10:13,520
Huwa jirritorna numru sħiħ iffirmat.

250
00:10:13,520 --> 00:10:16,130
Huwa jirritorna negattiv 1.

251
00:10:16,130 --> 00:10:17,830
OK, dan huwa stramb.

252
00:10:17,830 --> 00:10:27,030
>> What about jekk immur fi
hawn u tagħmel dan?

253
00:10:27,030 --> 00:10:29,700
Hekk stajt mibdula kollox
minn int sa mhux iffirmat.

254
00:10:29,700 --> 00:10:31,590
Huwa jista 'jieħu biss interi mhux iffirmat.

255
00:10:31,590 --> 00:10:33,840
Imma aħna xorta waħda baqgħu jaħsbu li ser run?

256
00:10:33,840 --> 00:10:35,652
>> UDJENZA: Iva.

257
00:10:35,652 --> 00:10:37,270
>> SPEAKER: Huwa se.

258
00:10:37,270 --> 00:10:39,410
Li crazy.

259
00:10:39,410 --> 00:10:43,140
U aħna jgħaddu b'mod kjarament assenjati
numru sħiħ, nistgħu jgħaddu tnejn jiġu ffirmati

260
00:10:43,140 --> 00:10:46,280
integer, għadu jaħdem.

261
00:10:46,280 --> 00:10:52,150
>> OK, xi ideat ta 'għaliex xorta
xogħlijiet, jew x'inhu għaddej?

262
00:10:52,150 --> 00:10:53,368
Yeah, Jeff.

263
00:10:53,368 --> 00:10:56,296
>> UDJENZA: Huwa xi ħaġa li tagħmel
ottimizzazzjoni tiegħek li inti

264
00:10:56,296 --> 00:10:57,760
enfasizzati.

265
00:10:57,760 --> 00:10:58,210
>> SPEAKER: Le

266
00:10:58,210 --> 00:11:00,570
Aħna jista 'jbiddel l-ottimizzazzjoni,
ikun għadhom jaħdmu.

267
00:11:00,570 --> 00:11:02,240
I tista 'tagħmel dan għalik, iżda -

268
00:11:02,240 --> 00:11:02,930
>> UDJENZA: I ser tieħu kelma tiegħek għaliha.

269
00:11:02,930 --> 00:11:03,690
>> SPEAKER: Yeah.

270
00:11:03,690 --> 00:11:09,690
Jekk inti tiftaħ il-makefile dritt hawn,
I biddel il-ottimizzazzjoni.

271
00:11:09,690 --> 00:11:11,570
Allura inti tista 'tagħmel sing żero, żero.

272
00:11:11,570 --> 00:11:12,820
Hija xorta se taħdem.

273
00:11:12,820 --> 00:11:16,839

274
00:11:16,839 --> 00:11:20,280
Ħsibijiet oħra?

275
00:11:20,280 --> 00:11:22,600
>> Inti guys kollha mistennija li jaħdmu, so
why'd inti tistenna li taħdem?

276
00:11:22,600 --> 00:11:31,210

277
00:11:31,210 --> 00:11:32,150
Nru?

278
00:11:32,150 --> 00:11:33,660
Silenzju.

279
00:11:33,660 --> 00:11:34,910
OK.

280
00:11:34,910 --> 00:11:39,271

281
00:11:39,271 --> 00:11:41,650
I ikollhom jistennew seba 'sekondi,
minħabba I titressaq mistoqsija.

282
00:11:41,650 --> 00:11:44,190

283
00:11:44,190 --> 00:11:48,660
>> Allura l-ħaġa jibred dwar C, u inti stajt
probabbilment esperjenzaw qabel - inti

284
00:11:48,660 --> 00:11:50,260
jista 'ma jkollhomx, dan jista'
tkun l-ewwel darba.

285
00:11:50,260 --> 00:11:57,030
Imma kif you know kollha, meta nikteb
xi ħaġa C, ma tiffranka simili

286
00:11:57,030 --> 00:11:57,760
dan fuq il-kompjuter.

287
00:11:57,760 --> 00:11:59,440
Huwa ffrankati bħala dawk u zeroes.

288
00:11:59,440 --> 00:12:02,970
Hija tmur minn kodiċi C għall-kodiċi assemblaġġ.

289
00:12:02,970 --> 00:12:09,460
>> Has ħadd raw kodiċi assemblaġġ qabel,
kodiċi assemblaġġ magna?

290
00:12:09,460 --> 00:12:10,630
Aħna ser tħares lejn fit-tieni.

291
00:12:10,630 --> 00:12:12,040
Hija tmur minn kodiċi C għall-kodiċi assemblaġġ.

292
00:12:12,040 --> 00:12:13,755
U inti guys jafu l-istadji
tal-ġbir.

293
00:12:13,755 --> 00:12:17,410
Kellek li jimmemorizza li għal kwizz waħda,
u mbagħad jiktbu fuq kwizz żero.

294
00:12:17,410 --> 00:12:18,240
Ħafna nies ltqajna hija żbaljata.

295
00:12:18,240 --> 00:12:19,760
I think inti guys nailed.

296
00:12:19,760 --> 00:12:22,880
>> Iżda, inti guys huma l-aħjar taqsima
għall kwizzijiet, mill-mod.

297
00:12:22,880 --> 00:12:25,210
Li huwa tal-biża.

298
00:12:25,210 --> 00:12:25,910
Dan mhux se tweġġgħek.

299
00:12:25,910 --> 00:12:26,900
Ma jkun inkwetat.

300
00:12:26,900 --> 00:12:28,800
Imma huwa verament jibred.

301
00:12:28,800 --> 00:12:29,660
Tajba tax-xogħol.

302
00:12:29,660 --> 00:12:32,870
>> Għalhekk tmur lingwa assemblaġġ, u
allura tmur biex dawk u zeroes.

303
00:12:32,870 --> 00:12:35,500
U dawk u zeroes huma salvati fuq il-
kompjuter, u dan huwa dak iffrankat fil-

304
00:12:35,500 --> 00:12:38,340
l a.out, jew f'dan il-każ,
l-fajl eżekutibbli.

305
00:12:38,340 --> 00:12:41,040
U l-kompjuter runs dawk u zeroes.

306
00:12:41,040 --> 00:12:41,670
Dritt?

307
00:12:41,670 --> 00:12:43,890
Imxejna tgħallmu dan qabel.

308
00:12:43,890 --> 00:12:47,490
>> Allura l-ħaġa jibred hija, dan mhux iffirmat
idea, l-idea ta 'tipi ints mhux iffirmat,

309
00:12:47,490 --> 00:12:50,490
eċċetera, eċċetera, li
up here fil-lingwa C.

310
00:12:50,490 --> 00:12:51,110
Dawk jeżistu.

311
00:12:51,110 --> 00:12:53,770
Iżda tipi ma jeżistux
dawk u zeroes.

312
00:12:53,770 --> 00:12:57,110
Tipi lanqas biss verament jeżistu fil-
il-livell tal-lingwa assemblaġġ.

313
00:12:57,110 --> 00:13:00,075
Allura li xi ħaġa li teżisti fis-C
dinja, iżda ma teżistix fil-kompjuter

314
00:13:00,075 --> 00:13:01,640
dinja jew proċessur dinja.

315
00:13:01,640 --> 00:13:04,660
C'est xi estrazzjoni li l-C
lingwa inkludiet, biex jagħmlu tagħna

316
00:13:04,660 --> 00:13:06,240
ħajja aktar faċli.

317
00:13:06,240 --> 00:13:09,990
>> Għalhekk fl-aħħar tal-ġurnata, I tista 'tikteb
affarijiet differenti ħafna hawn, u dan

318
00:13:09,990 --> 00:13:10,700
ma tagħmilx differenza.

319
00:13:10,700 --> 00:13:12,060
Minħabba li jeżisti biss
fid-dinja C.

320
00:13:12,060 --> 00:13:14,100
Dan ma jeżistix fil-
dawk u zeroes dinja.

321
00:13:14,100 --> 00:13:17,310
U tagħna programm ta 'esekuzzjoni
dawk u zeroes dinja.

322
00:13:17,310 --> 00:13:21,170
Allura moħħok b'mod ċar mhux minfuħa s'issa.

323
00:13:21,170 --> 00:13:22,740
Imma naħseb li jibred.

324
00:13:22,740 --> 00:13:23,530
Yeah, Jeff.

325
00:13:23,530 --> 00:13:27,298
>> UDJENZA: Allura, jekk minflok
tagħmel int, inti tagħmel char.

326
00:13:27,298 --> 00:13:27,770
U inti kienu -

327
00:13:27,770 --> 00:13:29,311
>> SPEAKER: Ejja nagħmlu dan fil-sec.

328
00:13:29,311 --> 00:13:32,583
>> UDJENZA: Għaliex imbagħad ikollok
mhux iffirmat jmorru minn negattiv 128 sa

329
00:13:32,583 --> 00:13:34,720
127 jew 0-255.

330
00:13:34,720 --> 00:13:36,760
>> SPEAKER: Allura char hija problematika.

331
00:13:36,760 --> 00:13:39,460
Ħadd ma jaf għaliex char tkun
problematiku, u huwa fil-fatt

332
00:13:39,460 --> 00:13:42,930
affarijiet jinbidlu fil-dawk
u zeroes dinja?

333
00:13:42,930 --> 00:13:44,370
>> UDJENZA: Minħabba d-daqs ta 'char.

334
00:13:44,370 --> 00:13:46,200
>> SPEAKER: Daqs ta 'char huwa 1.

335
00:13:46,200 --> 00:13:48,260
Allura mhux iffirmat huwa wkoll 4 bytes.

336
00:13:48,260 --> 00:13:50,080
Allura char se screw affarijiet up.

337
00:13:50,080 --> 00:13:55,660
Imma dak li huwa 4 bytes C'est
relatata ma 'char?

338
00:13:55,660 --> 00:13:57,820
Jew f'dak żżid wieħed addizzjonali -

339
00:13:57,820 --> 00:13:59,760
inti tista 'tpoġġi wieħed karattru aktar
wara char.

340
00:13:59,760 --> 00:14:00,200
>> UDJENZA: Char star.

341
00:14:00,200 --> 00:14:01,220
>> SPEAKER: Char star għandha 4 bytes.

342
00:14:01,220 --> 00:14:02,490
Mela ejja nagħmlu xi ħaġa
thats star char.

343
00:14:02,490 --> 00:14:05,470

344
00:14:05,470 --> 00:14:07,240
>> Allura dan probabbilment taħdem, iżda aħna qed
se jagħmlu xi ħaġa anke

345
00:14:07,240 --> 00:14:09,710
crazier minn dan.

346
00:14:09,710 --> 00:14:10,960
Fl-opinjoni tiegħi, crazier.

347
00:14:10,960 --> 00:14:21,060

348
00:14:21,060 --> 00:14:24,570
>> Stajt issa miktuba funzjoni li prospetti
pointer, u li tieħu

349
00:14:24,570 --> 00:14:29,480
pointer u valur mhux iffirmat - aħna ser
tbiddel dan lura li int hekk aħna mhux qed

350
00:14:29,480 --> 00:14:31,250
jagħmlu bidliet wisq f'daqqa.

351
00:14:31,250 --> 00:14:35,370
U għandu firxa tissejjaħ, l-indiċi
fil-firxa, u prospetti il-

352
00:14:35,370 --> 00:14:35,850
indirizz ta '.

353
00:14:35,850 --> 00:14:37,470
Rajna dawn l-operaturi qabel.

354
00:14:37,470 --> 00:14:43,340
Dan, x'taħseb dan se
tagħmel, bħala kumpens, meta I run?

355
00:14:43,340 --> 00:14:48,280

356
00:14:48,280 --> 00:14:49,070
What do you think li għaddej biex tagħmel?

357
00:14:49,070 --> 00:14:50,320
Kwalunkwe guesses?

358
00:14:50,320 --> 00:14:54,220

359
00:14:54,220 --> 00:14:55,320
>> UDJENZA: Segfault.

360
00:14:55,320 --> 00:14:55,600
>> SPEAKER: What?

361
00:14:55,600 --> 00:14:56,660
Segfault?

362
00:14:56,660 --> 00:14:58,520
Li raden tajba.

363
00:14:58,520 --> 00:14:59,430
Tom jgħid l-istess ħaġa.

364
00:14:59,430 --> 00:15:02,240
Kwalunkwe guesses oħra?

365
00:15:02,240 --> 00:15:05,260
>> Min jaħseb li għaddej biex
jagħmlu l-istess ħaġa?

366
00:15:05,260 --> 00:15:06,510
Min jaħseb li għaddej biex segfault?

367
00:15:06,510 --> 00:15:09,350

368
00:15:09,350 --> 00:15:10,230
Hija ma l-istess ħaġa.

369
00:15:10,230 --> 00:15:11,880
Jiddispjacini.

370
00:15:11,880 --> 00:15:13,860
>> Imma, naturalment, npoġġux f'1 u 2.

371
00:15:13,860 --> 00:15:16,470
U dawk huma t-tnejn validi, id-dritt?

372
00:15:16,470 --> 00:15:19,420
Ejja naraw, nistgħu mmorru għall-
tieni post ta 'firxa.

373
00:15:19,420 --> 00:15:24,010
Imma x'jiġri jekk għamilna b
numru negattiv?

374
00:15:24,010 --> 00:15:26,380
Din hija probabbilment raden aħjar
għall segfaulting xi ħaġa.

375
00:15:26,380 --> 00:15:30,310

376
00:15:30,310 --> 00:15:32,260
Għadu jaħdem.

377
00:15:32,260 --> 00:15:35,020
>> OK, dan issa huwa crazy.

378
00:15:35,020 --> 00:15:38,350
Dan huwa ta 'funzjoni somma ugwalment validi.

379
00:15:38,350 --> 00:15:40,470
Dan ma l-istess ħaġa eżatt
bħala ritorn au b.

380
00:15:40,470 --> 00:15:44,600
Jista 'xi ħadd jispjega għaliex dan huwa tajjeb
qosor il-funzjoni, jew għaliex dan xogħlijiet?

381
00:15:44,600 --> 00:15:45,850
Dak li qed jiġri hawn?

382
00:15:45,850 --> 00:15:49,360

383
00:15:49,360 --> 00:15:55,750
Għaliex ma dan jagħmlu l-istess eżatt
Ħaġa bħala funzjoni tagħna somma qodma?

384
00:15:55,750 --> 00:15:56,890
[? Akshar,?]

385
00:15:56,890 --> 00:15:58,155
x'inhu għaddej?

386
00:15:58,155 --> 00:16:01,540
>> UDJENZA: Minħabba meta jkollok
A li l-indirizz li

387
00:16:01,540 --> 00:16:03,950
il-memorja post -

388
00:16:03,950 --> 00:16:07,910
u meta inti tagħmel l-ampersand, hija
tmur f'dak l-indirizz tal-memorja.

389
00:16:07,910 --> 00:16:13,610
U meta inti tmur biex b, int tip ta '
passi mill dak l-indirizz tal-memorja li jiċċaqalqu,

390
00:16:13,610 --> 00:16:15,550
int jirritornaw dik.

391
00:16:15,550 --> 00:16:20,083
Allura int fil-fatt, fil-fatt,
żżid u b [inaudible].

392
00:16:20,083 --> 00:16:23,300

393
00:16:23,300 --> 00:16:26,222
Fejn huma operazzjonijiet standard
fuq li r-ritorn?

394
00:16:26,222 --> 00:16:27,683
Bħal, fejn ma l-parentesi jaqgħu?

395
00:16:27,683 --> 00:16:30,610
Huwa r-ritorn ta 'l-indirizz fuq
a qabel jew wara [inaudible]?

396
00:16:30,610 --> 00:16:32,380
>> SPEAKER: Huwa ser indiċi fis b -

397
00:16:32,380 --> 00:16:34,430
jew indiċi fi - u mbagħad
jirritorna l-indirizz.

398
00:16:34,430 --> 00:16:38,800

399
00:16:38,800 --> 00:16:41,340
OK, hekk ma kulħadd jifhem
liema [? Akshar?]

400
00:16:41,340 --> 00:16:45,830
qal, u spjegat, għaliex dan xogħlijiet?

401
00:16:45,830 --> 00:16:49,430
I ma, xi ħadd l-ewwel darba
spjegat dan lili.

402
00:16:49,430 --> 00:16:51,900
Kieku xi ħadd tixtieq stampa
li tispjega dan?

403
00:16:51,900 --> 00:16:55,320
Aħna qed tmur biex tfassal stampa, ma
ebda markers, li l-kbir.

404
00:16:55,320 --> 00:16:57,920
Sabet xi.

405
00:16:57,920 --> 00:17:03,390
>> Allura aħna għandna firxa li l-
serje ta 'kaxxi.

406
00:17:03,390 --> 00:17:07,160

407
00:17:07,160 --> 00:17:13,710
L-ewwel wieħed huwa indiċi 0, indiċi
1, 2, 3, 4, dot, dot, dot.

408
00:17:13,710 --> 00:17:15,609
A array tipiku.

409
00:17:15,609 --> 00:17:19,540
U minbarra li jkollhom indiċi,
dawn kollha jkollhom indirizzi memorja.

410
00:17:19,540 --> 00:17:30,190
Mela ejja tagħti dan l-indirizz tal-memorja
13, 14, 15, 16, 17, eċċetera.

411
00:17:30,190 --> 00:17:32,490
Kulħadd huwa hawn s'issa.

412
00:17:32,490 --> 00:17:35,810
>> Allura huwa indirizz.

413
00:17:35,810 --> 00:17:38,850
L-isem ta 'firxa, a pointer
jiġi ffrankat hemmhekk.

414
00:17:38,850 --> 00:17:42,730
Huwa pointer, huwa post memorja,
il-bidu ta 'l-array.

415
00:17:42,730 --> 00:17:45,910
Hekk jekk dan kien il-firxa,
a tkun valur ta '13.

416
00:17:45,910 --> 00:17:49,110
U, naturalment, nistgħu nagħtu
a xi valur li rridu.

417
00:17:49,110 --> 00:17:52,450
Char star a, nistgħu tagħti kwalunkwe
memorja indirizz rridu.

418
00:17:52,450 --> 00:17:55,940
Nistgħu nagħtu 0, nistgħu tagħtiha
negattiv 1 - negattiva 1 ma teżistix,

419
00:17:55,940 --> 00:17:58,820
hekk li probabbilment problematiku, iżda
inti raw li għadu maħduma.

420
00:17:58,820 --> 00:18:03,070
Allura aħna tista 'tagħti kull numru li rridu,
kwalunkwe memorja indirizz rridu.

421
00:18:03,070 --> 00:18:08,720
>> Imbagħad, int b jgħid, OK, mur dan in-numru
tal-passi fil-firxa.

422
00:18:08,720 --> 00:18:13,150
Mela jekk b ugwali 2, u ugwali 13,
aħna qed fil-memorja indirizz 13.

423
00:18:13,150 --> 00:18:17,330
U immorru żewġ passi fl,
u hekk aħna qed hawn.

424
00:18:17,330 --> 00:18:21,150
U l-ampersand ifisser ritorn
l-indirizz ta 'dan il-post.

425
00:18:21,150 --> 00:18:23,990
U l-indirizz huwa, ovvjament, 15.

426
00:18:23,990 --> 00:18:28,710
Allura irridu jiksbu 13 flimkien ma '2, jew
plus b, li huwa 15.

427
00:18:28,710 --> 00:18:29,590
>> Il-kwistjoni hija, għalkemm -

428
00:18:29,590 --> 00:18:30,250
Jien sorry.

429
00:18:30,250 --> 00:18:34,324
Does li tiċċara l-affarijiet
għal għaliex dan xogħlijiet?

430
00:18:34,324 --> 00:18:36,300
>> UDJENZA: Għaliex kieku taħdem għaddej -

431
00:18:36,300 --> 00:18:38,770
sabiex inti jista 'jkollhom firxa u
mur indiċi negattiv?

432
00:18:38,770 --> 00:18:39,050
>> SPEAKER: Dritt.

433
00:18:39,050 --> 00:18:40,870
Allura għamilna numri negattivi,
b'tali mod li l -

434
00:18:40,870 --> 00:18:42,770
ma dan jagħmel sens għalkemm,
ewwel, [? Avi,?]

435
00:18:42,770 --> 00:18:43,120
għalik?

436
00:18:43,120 --> 00:18:48,840
>> UDJENZA: Yeah jien biss
[Inaudible], iżda -

437
00:18:48,840 --> 00:18:50,440
>> SPEAKER: Yeah, dan se jerġa 'lura 15.

438
00:18:50,440 --> 00:18:53,523
Jekk kien 13, u b kienet 2,
dan se jerġa 'lura 15.

439
00:18:53,523 --> 00:18:58,160
>> UDJENZA: Allura l-indiċjar żero ma
jsir kwistjoni, id-dritt?

440
00:18:58,160 --> 00:19:00,160
Għax int jiċċaqalqu minn 0.

441
00:19:00,160 --> 00:19:00,470
>> SPEAKER: Dritt.

442
00:19:00,470 --> 00:19:05,000
Allura inti qed jiċċaqalqu - hekk jekk b kien ta '0,
inti ma tgħaddix kullimkien.

443
00:19:05,000 --> 00:19:06,330
U youd biss lura l-indirizz -

444
00:19:06,330 --> 00:19:10,830
jekk b '0, li essenzjalment
jirritornaw dak l-indirizz ta '.

445
00:19:10,830 --> 00:19:13,960
Tgħaddi fil char star au jirritorna l-
indirizz ta 'huwa biss jirritornaw,

446
00:19:13,960 --> 00:19:15,860
essenzjalment.

447
00:19:15,860 --> 00:19:18,280
>> OK, il-kwistjoni hija għaliex
numri negattivi taħdem?

448
00:19:18,280 --> 00:19:21,670
U dan huwa l-ħaġa verament jibred dwar
dan, minħabba li dan għandu segfault.

449
00:19:21,670 --> 00:19:25,110
U dan ikun segfault jekk aħna
għamilt xi ħaġa bħal din.

450
00:19:25,110 --> 00:19:28,050

451
00:19:28,050 --> 00:19:29,300
Ejja ngħidu, int.

452
00:19:29,300 --> 00:19:34,390

453
00:19:34,390 --> 00:19:39,810
Allura dan il-kodiċi tidher identika u
għandhom iġibu ruħhom b'mod identiku.

454
00:19:39,810 --> 00:19:44,550
Essenzjalment, x hija varjabbli żibel,
u għalhekk dan għandu jġib ruħu b'mod identiku.

455
00:19:44,550 --> 00:19:46,370
>> Ejja jagħmlu dan -

456
00:19:46,370 --> 00:19:47,620
oops -

457
00:19:47,620 --> 00:19:54,790

458
00:19:54,790 --> 00:19:56,040
fil star.

459
00:19:56,040 --> 00:19:59,160

460
00:19:59,160 --> 00:20:02,733
OK, aħna qed diġà jkollna żbalji hawnhekk,
għaliex huwa diġà għaddej biex tkun rrabjata

461
00:20:02,733 --> 00:20:04,610
fil lili, għaliex diġà
jaf dak li ġejjin.

462
00:20:04,610 --> 00:20:07,060
B'mod partikolari, it-tieni wieħed.

463
00:20:07,060 --> 00:20:09,800
Indirizz tal-memorja f'munzelli assoċjati
ma 'varjabbli lokali.

464
00:20:09,800 --> 00:20:14,220
>> Essenzjalment, jien mhux ser jikkompilaw
dan, u mbagħad jien ser teqred tagħmel

465
00:20:14,220 --> 00:20:14,920
dak li aħna biss għamlet.

466
00:20:14,920 --> 00:20:19,130
Iżda għaliex aħna qed fatt qatt ma
aċċess x'hemm fil-memorja

467
00:20:19,130 --> 00:20:21,930
post, huwa mhux ser segfault.

468
00:20:21,930 --> 00:20:26,450
Aħna qed fatt qatt ma tħares lejn x'hemm
fit-tieni kaxxa jew x'hemm fi kwalunkwe kaxxa

469
00:20:26,450 --> 00:20:28,340
ta 'dan array.

470
00:20:28,340 --> 00:20:30,980
Aħna biss qal, hawn l-indirizz
tal-ħaġa aħna qed tfittex għal u

471
00:20:30,980 --> 00:20:32,410
jirritorna f'dak l-indirizz.

472
00:20:32,410 --> 00:20:35,700
Aħna qatt ma attwalment għaddejjin fil-
array li tħares lejn il-post.

473
00:20:35,700 --> 00:20:39,140
U għaliex aħna qatt ma tmissx il-memorja,
aħna ma jsibux fl-inkwiet.

474
00:20:39,140 --> 00:20:40,760
Aħna ma jiksbu segfault.

475
00:20:40,760 --> 00:20:46,225
>> Jekk aħna ppruvaw, għal darb'oħra, touch li
memorja, touch dak kien fi jew b -

476
00:20:46,225 --> 00:20:49,940
jew bracket b, u jekk wieħed jassumi
a kien 0 u -

477
00:20:49,940 --> 00:20:53,040
jekk kien ta '0, anki, li tkun pretty
bad, għaliex aħna ma tistax tmur

478
00:20:53,040 --> 00:20:54,090
isfel it-triq kollha hemmhekk.

479
00:20:54,090 --> 00:20:58,250
Jekk u b tnejn kienu 0, u aħna ppruvaw
tmissx dak li kien hemm, allura aħna kieku

480
00:20:58,250 --> 00:20:59,110
nikseb fl-inkwiet.

481
00:20:59,110 --> 00:21:02,160
Imma jekk aħna ma tmissx x'hemm hemmhekk,
aħna biss jirritorna l-indirizz, huwa

482
00:21:02,160 --> 00:21:08,300
fil-fatt mhux se segfault minħabba
ihallik twettaq dawk l-operazzjonijiet.

483
00:21:08,300 --> 00:21:11,920
Huwa biss gets ġenn fil inti, u gets super
rrabjata, meta inti tipprova u tmissx

484
00:21:11,920 --> 00:21:15,740
il-memorja attwali u r-ritorn x'hemm
f'dak il-post memorja.

485
00:21:15,740 --> 00:21:17,690
>> Does li jagħmel sens?

486
00:21:17,690 --> 00:21:24,820
Li jinsab biss parti crazy ta 'C. Allura,
aħna għandna waħda aktar minn dawn.

487
00:21:24,820 --> 00:21:27,760

488
00:21:27,760 --> 00:21:29,700
>> Li jaħseb dan huwa jibred?

489
00:21:29,700 --> 00:21:30,280
Aktar nies.

490
00:21:30,280 --> 00:21:31,070
Li tajjeb.

491
00:21:31,070 --> 00:21:34,860
OK, dan huwa l-aħħar wieħed tagħna.

492
00:21:34,860 --> 00:21:37,314
U nixtieq li inti tgħidli jekk
jew taħsibx dan se

493
00:21:37,314 --> 00:21:38,564
biex jagħmlu l-istess ħaġa eżatt.

494
00:21:38,564 --> 00:22:06,050

495
00:22:06,050 --> 00:22:07,390
>> Għandi dawn bil-miktub stabbiliti x'imkien.

496
00:22:07,390 --> 00:22:08,640
Jien ma memorizing minnhom.

497
00:22:08,640 --> 00:22:33,350

498
00:22:33,350 --> 00:22:42,900
>> Ejja naraw, 8, b 4, 4, 2, 4, 0,
8, 0, 3, 4, 4, 2, 4, 0, 4.

499
00:22:42,900 --> 00:22:46,670
Allura dan huwa firxa, issa,
mhix funzjoni.

500
00:22:46,670 --> 00:22:49,640
U huwa firxa għaliex għandna kwadru
parentesi, braces ma kaboċċi.

501
00:22:49,640 --> 00:22:52,360
U huwa firxa ta 'liema tip?

502
00:22:52,360 --> 00:22:55,540

503
00:22:55,540 --> 00:22:56,862
Kulħadd, hmm?

504
00:22:56,862 --> 00:22:57,694
>> UDJENZA: numri hexadecimal tagħhom?

505
00:22:57,694 --> 00:22:59,650
>> SPEAKER: Imma x'inhu t-tip C?

506
00:22:59,650 --> 00:23:00,710
Dawn kollha għandhom numri hexadecimal.

507
00:23:00,710 --> 00:23:01,960
X'hemm-tip C?

508
00:23:01,960 --> 00:23:04,730

509
00:23:04,730 --> 00:23:05,480
Dan jgħidlek.

510
00:23:05,480 --> 00:23:07,350
>> UDJENZA: Huwa Chars mhux iffirmat.

511
00:23:07,350 --> 00:23:09,170
>> SPEAKER: Dritt, Chars mhux iffirmat.

512
00:23:09,170 --> 00:23:13,050
U żewġ numri hexadecimal
huwa byte wieħed.

513
00:23:13,050 --> 00:23:18,540
Allura dawn huma 1, 2, 3, 4,
5, 6, 7, 8, 9 bytes.

514
00:23:18,540 --> 00:23:21,360
Huwa ta 'firxa ta' 9 bytes.

515
00:23:21,360 --> 00:23:25,530
>> OK, inti probabilment diġà taf
ir-risposta għal din il-mistoqsija.

516
00:23:25,530 --> 00:23:29,840
Iżda, dak li taħseb li se
jiġri meta I run dan?

517
00:23:29,840 --> 00:23:34,110
I say, għal darb'oħra, fil mysum.c,
Jien jistennew funzjoni

518
00:23:34,110 --> 00:23:36,280
li jieħu żewġ interi.

519
00:23:36,280 --> 00:23:40,265
U jien minflok tgħid li somma
firxa ta 'karattri.

520
00:23:40,265 --> 00:23:42,780

521
00:23:42,780 --> 00:23:48,070
X'inhu jiġri meta
I run. / Mysum u jagħmlu?

522
00:23:48,070 --> 00:23:53,230
>> Ukoll, l-ewwel, ħafna minnkom probabbilment se
jaqblu li jagħmlu - oh no, just kidding.

523
00:23:53,230 --> 00:23:54,746
What'd nagħmel ħażin?

524
00:23:54,746 --> 00:23:55,996
Uh oh.

525
00:23:55,996 --> 00:23:59,220

526
00:23:59,220 --> 00:24:01,160
Li għandu jkun ċineg kaboċċi.

527
00:24:01,160 --> 00:24:02,790
Thats kif inti initialize firxa.

528
00:24:02,790 --> 00:24:04,040
My bad.

529
00:24:04,040 --> 00:24:07,530

530
00:24:07,530 --> 00:24:11,670
>> Allura aħna diġà raw qabel li t-tipi
huma astrazzjoni ta 'livell C, mhux

531
00:24:11,670 --> 00:24:12,610
estrazzjoni livell kompjuter.

532
00:24:12,610 --> 00:24:16,360
Allura ħafna minnkom probabbilment mistenni li
jagħmlu, jew jekk wieħed jassumi li hija kienet ser tagħmel.

533
00:24:16,360 --> 00:24:18,680
Imma dak li meta I run. / Mysum?

534
00:24:18,680 --> 00:24:19,930
X'qed jiġri?

535
00:24:19,930 --> 00:24:21,790

536
00:24:21,790 --> 00:24:23,422
Kwalunkwe guesses?

537
00:24:23,422 --> 00:24:25,270
>> UDJENZA: Huwa ser
jistampa kelma.

538
00:24:25,270 --> 00:24:26,310
>> SPEAKER: Huwa ser
jistampa kelma.

539
00:24:26,310 --> 00:24:29,335
What kelma?

540
00:24:29,335 --> 00:24:32,200
>> UDJENZA: [inaudible].

541
00:24:32,200 --> 00:24:33,240
>> SPEAKER: Kull guesses oħra?

542
00:24:33,240 --> 00:24:34,000
OK, jistampa frażi.

543
00:24:34,000 --> 00:24:35,130
Inti jista 'jkollhom kwalunkwe frażi.

544
00:24:35,130 --> 00:24:36,240
Dak se jkun in-naħa tiegħek.

545
00:24:36,240 --> 00:24:38,480
Kull min għandu raden differenti?

546
00:24:38,480 --> 00:24:39,730
Anna, x'hemm raden tiegħek?

547
00:24:39,730 --> 00:24:42,675

548
00:24:42,675 --> 00:24:44,615
>> UDJENZA: Hija ser jistampa -

549
00:24:44,615 --> 00:24:47,525

550
00:24:47,525 --> 00:24:49,480
żewġ ittri, jew [inaudible]
ittra waħda.

551
00:24:49,480 --> 00:24:51,460
>> SPEAKER: ittra waħda.

552
00:24:51,460 --> 00:24:53,260
>> UDJENZA: Nista għadd kemm
ħafna [inaudible]?

553
00:24:53,260 --> 00:24:55,426
>> SPEAKER: Disa.

554
00:24:55,426 --> 00:24:56,640
Well, jien ser run.

555
00:24:56,640 --> 00:24:58,650
Hija ma l-istess ħaġa eżatt.

556
00:24:58,650 --> 00:25:00,190
Hija żżid żewġ numri flimkien.

557
00:25:00,190 --> 00:25:02,740
Well, ejja jgħaddu l-żewġ argumenti.

558
00:25:02,740 --> 00:25:03,710
Hija ma tikkunsidrax argumenti.

559
00:25:03,710 --> 00:25:06,080
So I do not know fejn hija setgħet
possibilment tinkiseb dawn l-argumenti.

560
00:25:06,080 --> 00:25:07,710
Imma ejja jgħaddu b'100 u 0.

561
00:25:07,710 --> 00:25:09,200
U żżid 100 u 0.

562
00:25:09,200 --> 00:25:10,220
Li insane.

563
00:25:10,220 --> 00:25:12,280
I think so.

564
00:25:12,280 --> 00:25:14,480
>> Negattiv 4, li x-xogħlijiet wisq.

565
00:25:14,480 --> 00:25:15,650
Tista 'tagħmel xi ħaġa li trid.

566
00:25:15,650 --> 00:25:17,920
Din hija funzjoni somma ugwalment validi.

567
00:25:17,920 --> 00:25:19,640
Din hija funzjoni somma.

568
00:25:19,640 --> 00:25:21,510
Iżda, l-ebda, inti qed tgħid huwa
firxa ta 'bytes.

569
00:25:21,510 --> 00:25:23,570
Allura dak li qed jiġri hawn?

570
00:25:23,570 --> 00:25:27,240
>> Għalhekk, għal darb'oħra, ejja mur lura għall-din l-idea
li għidna fil-bidu nett.

571
00:25:27,240 --> 00:25:32,050
Inti tmur mill-kodiċi ta 'livell C, għall-assemblaġġ
lingwa, li dawk u zeroes.

572
00:25:32,050 --> 00:25:33,050
Dan huwa hexadecimal.

573
00:25:33,050 --> 00:25:35,780
Iżda dan huwa verament ftit
lott ta 'dawk u zeroes.

574
00:25:35,780 --> 00:25:39,230
Dan huwa 72 dawk u zeroes, right?

575
00:25:39,230 --> 00:25:40,550
72 dawk u zeroes.

576
00:25:40,550 --> 00:25:42,160
9 bytes.

577
00:25:42,160 --> 00:25:43,740
Kull byte tkun 8 bits.

578
00:25:43,740 --> 00:25:44,760
Kull bit hija waħda jew żero.

579
00:25:44,760 --> 00:25:45,920
Allura 72 dawk jew zeroes.

580
00:25:45,920 --> 00:25:48,780
Stajt biss bil-miktub minnhom bħal dan -
minflok bil-miktub dan jitwettaq bħala lott ta '

581
00:25:48,780 --> 00:25:49,730
dawk u zeroes.

582
00:25:49,730 --> 00:25:53,560
>> Iżda dan se jmorru minn livell C
lingwa, għall-assemblaġġ

583
00:25:53,560 --> 00:25:54,620
lingwa, għall-kodiċi.

584
00:25:54,620 --> 00:25:59,020
U dan se jistampa fil-kodiċi,
x'imkien, dawn it-72 dawk u zeroes

585
00:25:59,020 --> 00:26:00,910
li stajt bil-miktub hawn.

586
00:26:00,910 --> 00:26:03,610
Allura x'imkien peress li -

587
00:26:03,610 --> 00:26:04,850
ejja mur hawn -

588
00:26:04,850 --> 00:26:11,240
x'imkien fl mysum, il-programm, hemm
huma dawn it-72 dawk u zeroes li stajt

589
00:26:11,240 --> 00:26:14,930
bil-miktub u qal li jiktbu.

590
00:26:14,930 --> 00:26:19,331
>> Issa, xi guesses għal liema dawk
72 dawk u zeroes jfisser?

591
00:26:19,331 --> 00:26:21,240
>> UDJENZA: Probabbilment l-istess
Ħaġa bħala ritorn plus b.

592
00:26:21,240 --> 00:26:22,890
>> SPEAKER: Probabbilment l-istess
Ħaġa bħala ritorn plus b.

593
00:26:22,890 --> 00:26:23,730
Ejja tivverifika.

594
00:26:23,730 --> 00:26:25,210
Ejja figura kif I ma 'dan.

595
00:26:25,210 --> 00:26:31,840
>> Mela jekk inti tmur lura hawn, I jgħidlek
biex imexxu dan il-kmand, objdump-S

596
00:26:31,840 --> 00:26:34,290
sumfunction.o.

597
00:26:34,290 --> 00:26:36,230
Ejja ħa mmorru run. objdump -

598
00:26:36,230 --> 00:26:37,990
obj, dump.

599
00:26:37,990 --> 00:26:39,840
Bażikament tista 'tagħti me
kwalunkwe I trid tara.

600
00:26:39,840 --> 00:26:40,840
Hija tista 'tagħti me-lingwa assemblaġġ.

601
00:26:40,840 --> 00:26:42,730
Hija tista 'tagħti me-dawk u zeroes.

602
00:26:42,730 --> 00:26:43,840
Hija għandha ton ta 'bnadar.

603
00:26:43,840 --> 00:26:45,860
Dan huwa l-waħda aħna qed tmur
għall-użu għal issa.

604
00:26:45,860 --> 00:26:46,980
Dot -

605
00:26:46,980 --> 00:26:48,810
kif tara fil-pjastri -

606
00:26:48,810 --> 00:26:53,840
kapital sing S jgħid, intersperse,
kodiċi tas-sors -

607
00:26:53,840 --> 00:26:58,410
din il-linja huwa minn C - bl-assemblaġġ
kodiċi u ma 'dawk u zeroes.

608
00:26:58,410 --> 00:27:00,350
U aħna qed tmur biex jimxu
fuq sumfunction.o.

609
00:27:00,350 --> 00:27:01,410
Għaliex dan ser ikun aktar faċli biex tara.

610
00:27:01,410 --> 00:27:02,670
Għal darb'oħra - hmm?

611
00:27:02,670 --> 00:27:04,700
>> UDJENZA: You spelt hija żbaljata.

612
00:27:04,700 --> 00:27:05,930
>> SPEAKER: Imma jien attwalment għaddejjin
biex ċar dan għat-tieni.

613
00:27:05,930 --> 00:27:09,160
Jien l-ewwel ser tiftaħ
biss sumfuntion.o.

614
00:27:09,160 --> 00:27:11,170
>> UDJENZA: You spelt dan
ħażin l-ewwel darba.

615
00:27:11,170 --> 00:27:12,420
>> SPEAKER: Classic.

616
00:27:12,420 --> 00:27:14,790

617
00:27:14,790 --> 00:27:15,480
Somma -

618
00:27:15,480 --> 00:27:16,680
li hija kelma iebsa, għalkemm.

619
00:27:16,680 --> 00:27:19,050
Youd tkun sorpriż.

620
00:27:19,050 --> 00:27:21,560
OK, għalhekk dan huwa sumfunction.o.

621
00:27:21,560 --> 00:27:24,494

622
00:27:24,494 --> 00:27:26,220
I ma setgħux lanqas jgħidlek.

623
00:27:26,220 --> 00:27:30,250
Hemm ħafna ta zeroes b'mod ċar ħafna
tal zeroes, u hemm xi oħrajn

624
00:27:30,250 --> 00:27:31,930
Jittieħed li mhux zeroes.

625
00:27:31,930 --> 00:27:33,220
Imma l-aktar zeroes.

626
00:27:33,220 --> 00:27:35,120
Qisu hemm xi wħud.

627
00:27:35,120 --> 00:27:36,810
Allura ċar, dan huwa diffiċli biex jinqara.

628
00:27:36,810 --> 00:27:39,320
Dik hija l-lingwa binarja.

629
00:27:39,320 --> 00:27:40,710
>> Ejja issa miftuħa -

630
00:27:40,710 --> 00:27:50,190

631
00:27:50,190 --> 00:27:52,350
liema?

632
00:27:52,350 --> 00:27:53,600
What am I tagħmel ħażin?

633
00:27:53,600 --> 00:27:56,955

634
00:27:56,955 --> 00:27:58,434
Did I jespliċitaw b'mod korrett?

635
00:27:58,434 --> 00:28:09,865

636
00:28:09,865 --> 00:28:11,120
OK, dan huwa skomda.

637
00:28:11,120 --> 00:28:37,560

638
00:28:37,560 --> 00:28:40,158
I bżonn tieni wieħed biex insemmu
out dak li jien tagħmel ħażin.

639
00:28:40,158 --> 00:28:46,030

640
00:28:46,030 --> 00:28:49,310
C'est żball wieħed.

641
00:28:49,310 --> 00:28:50,560
Li stramb.

642
00:28:50,560 --> 00:28:58,080

643
00:28:58,080 --> 00:29:01,800
Oh, hu għalhekk li.

644
00:29:01,800 --> 00:29:09,880
>> Jien se jmorru lura għall-bidu tagħna
wieħed, sabiex inkunu nistgħu nħarsu lejn il-

645
00:29:09,880 --> 00:29:10,560
kodiċi għan ta 'dan.

646
00:29:10,560 --> 00:29:13,390
Għaliex hemm mhux verament se
jkun xejn meta aħna biss jitqiegħed il-

647
00:29:13,390 --> 00:29:14,640
dawk u zeroes pulzieri

648
00:29:14,640 --> 00:29:29,000

649
00:29:29,000 --> 00:29:30,200
Hemm immorru.

650
00:29:30,200 --> 00:29:32,425
OK, hekk kulħadd jista 'jara dan.

651
00:29:32,425 --> 00:29:38,130
Din il-funzjoni, kif għidt,
tpoġġi l-linji C -

652
00:29:38,130 --> 00:29:39,060
linji source code -

653
00:29:39,060 --> 00:29:41,000
b'xi istruzzjonijiet għall-immuntar.

654
00:29:41,000 --> 00:29:42,760
>> Hawnhekk huwa linja kodiċi sors tagħna.

655
00:29:42,760 --> 00:29:44,910
Hawn wieħed, hawn ieħor.

656
00:29:44,910 --> 00:29:46,540
Hawn hu l-istruzzjoni assemblaġġ.

657
00:29:46,540 --> 00:29:47,820
Dan huwa dak li look like.

658
00:29:47,820 --> 00:29:49,010
Istruzzjonijiet -

659
00:29:49,010 --> 00:29:51,530
inti tista 'titgħallem aktar minn dawn jekk tieħu
klassijiet oħra CS, iżda dawn qed

660
00:29:51,530 --> 00:29:53,500
ġeneralment struzzjoni.

661
00:29:53,500 --> 00:29:57,940
U mbagħad sors u destinazzjoni.

662
00:29:57,940 --> 00:30:02,740
>> U allura hawn huwa l-kodiċi binarju
li jikkorrispondi għal dik l-assemblea

663
00:30:02,740 --> 00:30:04,940
istruzzjoni.

664
00:30:04,940 --> 00:30:09,760
Allura kif tistgħu taraw, din il-funzjoni somma,
fl-aħħar tal-ġurnata, huwa ta 'tliet

665
00:30:09,760 --> 00:30:10,950
istruzzjonijiet.

666
00:30:10,950 --> 00:30:12,870
Biss tlieta.

667
00:30:12,870 --> 00:30:14,180
One mov -

668
00:30:14,180 --> 00:30:16,740
dan m-o-v stands għal Nimxu.

669
00:30:16,740 --> 00:30:17,780
Żid stands għall Add.

670
00:30:17,780 --> 00:30:20,440
U r-e-t stands għall Ritorn.

671
00:30:20,440 --> 00:30:22,540
Allura mov waħda, żid waħda, ritorn wieħed.

672
00:30:22,540 --> 00:30:27,970
U dawn, hawn fuq, huma l zeroes u
dawk li jikkorrispondu għal dan il-kodiċi.

673
00:30:27,970 --> 00:30:31,100
>> Allura dawk zeroes u dawk, jekk inti
taf dawk, inti tista 'biss jitqiegħed

674
00:30:31,100 --> 00:30:32,140
dawk dritta pulzieri

675
00:30:32,140 --> 00:30:34,130
U allura ser tagħmel l-
istess ħaġa eżatt.

676
00:30:34,130 --> 00:30:37,260
Minħabba li, fl-aħħar tal-ġurnata, kollha
int eżekuzzjoni hija serje twila ta '

677
00:30:37,260 --> 00:30:38,480
zeroes u dawk.

678
00:30:38,480 --> 00:30:40,700
U dan huwa dak kodiċi tiegħek hija verament.

679
00:30:40,700 --> 00:30:41,770
>> U r-raġuni -

680
00:30:41,770 --> 00:30:43,680
ejja nħarsu lejn ħaġa waħda.

681
00:30:43,680 --> 00:30:45,440
Did I jkollhom l-makefile miftuħ?

682
00:30:45,440 --> 00:30:48,510
Allura jekk aħna marru lura għal sing
żero, żero up here -

683
00:30:48,510 --> 00:30:52,220

684
00:30:52,220 --> 00:30:57,300
sorry, o kapital, kapital
o zero, mhux żero, żero.

685
00:30:57,300 --> 00:31:01,810
U aħna ma jagħmlu, ikun
għadhom jaħdmu l-istess.

686
00:31:01,810 --> 00:31:05,420
Imma issa tinnota li hemm
ħafna aktar istruzzjonijiet.

687
00:31:05,420 --> 00:31:09,090
Dak għax, għal darb'oħra, I talab lill-
kompilatur ma tagħmel xi ottimizzazzjoni.

688
00:31:09,090 --> 00:31:12,800
>> So I setgħet xorta kollha ta 'dawn
zeroes u dawk, u tarmi lilhom fil,

689
00:31:12,800 --> 00:31:13,390
u li tkun taħdem.

690
00:31:13,390 --> 00:31:15,850
I biss għamlet l-optimizations, għaliex
huwa daqsxejn aktar faċli, allura,

691
00:31:15,850 --> 00:31:17,310
jiktbu dak array.

692
00:31:17,310 --> 00:31:19,730
Iżda din se taħdem biss ukoll.

693
00:31:19,730 --> 00:31:24,460
>> OK, aħna qed tmur biex tagħmel ħaġa waħda finali,
għaliex naħseb hija l-parti coolest.

694
00:31:24,460 --> 00:31:27,410
Anki jekk kulħadd huwa b'mod ċar
diġà minfuħa u speechless.

695
00:31:27,410 --> 00:31:30,520

696
00:31:30,520 --> 00:31:31,670
Imħuħ tagħna huma minfuħa.

697
00:31:31,670 --> 00:31:32,920
[Inaudible]

698
00:31:32,920 --> 00:31:47,580

699
00:31:47,580 --> 00:31:51,520
>> Għalhekk, dawn huma minn klassi CS differenti,
li huwa super interessanti,

700
00:31:51,520 --> 00:31:52,970
li ħadt -

701
00:31:52,970 --> 00:31:54,140
CS61.

702
00:31:54,140 --> 00:31:55,910
I ħafna ninkoraġġukom biex teħodha.

703
00:31:55,910 --> 00:31:58,990
Imma l-parti jibred dwar dan il-fatt, li
affarijiet huma biss zeroes u dawk,

704
00:31:58,990 --> 00:32:01,270
huma li kollox huwa
zeroes u dawk.

705
00:32:01,270 --> 00:32:05,330
>> Allura inti tista 'tieħu fajl li għandu l-
zeroes korretta u dawk li trid

706
00:32:05,330 --> 00:32:10,390
x'imkien fiha, u juża dak is-sezzjoni ta '
zeroes u dawk bħala funzjoni somma.

707
00:32:10,390 --> 00:32:11,480
>> What do I jfisser minn dak?

708
00:32:11,480 --> 00:32:15,755
I jfissirx li inti tista 'tieħu immaġni fajl li
għandha l-serje korretta tal zeroes u

709
00:32:15,755 --> 00:32:17,120
dawk, li jistampaw xi ħaġa
lil immaġini.

710
00:32:17,120 --> 00:32:20,070
U programm wieħed jista 'jinterpreta huwa
image, imma int tista 'tinterpreta dan, jekk

711
00:32:20,070 --> 00:32:22,040
trid, bħala funzjoni somma.

712
00:32:22,040 --> 00:32:27,010
>> Hekk jekk ridna li tiftaħ, għal
eżempju, din id-dehra.

713
00:32:27,010 --> 00:32:37,440
Ejja ħa mmorru, Hello Kitty.

714
00:32:37,440 --> 00:32:38,810
Image ftit mill-isbaħ.

715
00:32:38,810 --> 00:32:42,260
Fil hawn hemm li string
tal zeroes u dawk.

716
00:32:42,260 --> 00:32:45,500
Dawk zeroes 72 u dawk
jeżistu f'dan image.

717
00:32:45,500 --> 00:32:47,695
>> Allura dak I jistgħu jagħmlu, allura, hu li tikteb -

718
00:32:47,695 --> 00:32:50,510

719
00:32:50,510 --> 00:32:51,760
I għandek tiftakar fejn huma.

720
00:32:51,760 --> 00:32:54,550

721
00:32:54,550 --> 00:32:55,720
I ser issib li fit-tieni.

722
00:32:55,720 --> 00:32:57,840
Iżda nagħmlu -

723
00:32:57,840 --> 00:32:59,440
let me taf fejn huma.

724
00:32:59,440 --> 00:33:00,020
Wieħed taqs.

725
00:33:00,020 --> 00:33:01,270
Ejja nagħmlu -

726
00:33:01,270 --> 00:33:05,800

727
00:33:05,800 --> 00:33:07,240
>> UDJENZA: [inaudible].

728
00:33:07,240 --> 00:33:08,490
>> SPEAKER: Grazzi.

729
00:33:08,490 --> 00:33:24,240

730
00:33:24,240 --> 00:33:28,740
Allura jekk aħna tesegwixxi dan il-programm, li
minflok jaqra fil-fajl, allura tmur

731
00:33:28,740 --> 00:33:33,160
għal dan l-indiċi fil-fajl.

732
00:33:33,160 --> 00:33:35,500
U mbagħad, għal darb'oħra, bħad
mysum, jieħu żewġ numri.

733
00:33:35,500 --> 00:33:41,410
Nistgħu żid in-numri eżattament l-istess bħal
aħna kienu qed jagħmlu qabel, li tmur lil

734
00:33:41,410 --> 00:33:44,850
nuruk kif il-fatt li, fl-aħħar
tal-ġurnata, dawn l-affarijiet huma

735
00:33:44,850 --> 00:33:45,350
zeroes u dawk.

736
00:33:45,350 --> 00:33:48,170
U huwa biss kif inti tagħżel
li tinterpretahom.

737
00:33:48,170 --> 00:33:50,770
>> U jekk inti fil-fatt tfittex
f'dan image -

738
00:33:50,770 --> 00:33:52,930
ejja zoom daqsxejn.

739
00:33:52,930 --> 00:33:53,720
Jista kulħadd jarawha?

740
00:33:53,720 --> 00:33:57,570
Int ser ikollok avviż dritt hawn, hemm
xi smudge stramb.

741
00:33:57,570 --> 00:34:00,130

742
00:34:00,130 --> 00:34:02,290
Ejja ħa mmorru - dan huwa l-immaġini oriġinali.

743
00:34:02,290 --> 00:34:04,540
Int ser ikollok avviż hawn hemm ebda smudge.

744
00:34:04,540 --> 00:34:08,420
Dan huwa l-kodiċi għall-funzjoni somma,
hija li ftit smudge hemm dritt.

745
00:34:08,420 --> 00:34:13,449
>> U fil-fatt, għal darb'oħra, jekk inti titgħallem aktar
dwar dan, inti ser tirrealizza li dan

746
00:34:13,449 --> 00:34:18,270
Hello Kitty, li għandu saħansitra akbar
smudge, għandu kodiċi li tista 'tieħu f'idejha l-

747
00:34:18,270 --> 00:34:21,800
kompjuter jekk mhuwiex protett
xieraq.

748
00:34:21,800 --> 00:34:23,920
Allura inti tista 'tmexxi effettivament dan.

749
00:34:23,920 --> 00:34:25,380
Jien ma jmur biex imexxu dan id-dritt issa.

750
00:34:25,380 --> 00:34:30,600
Iżda int tista 'taħdem din il-Hello
Image Kitty, u din tista '

751
00:34:30,600 --> 00:34:32,429
tieħu f'idejha l-kompjuter tiegħek.

752
00:34:32,429 --> 00:34:35,159
>> Hekk li kollox għall-demo.

753
00:34:35,159 --> 00:34:38,560
Ħadd ma jkollu xi mistoqsijiet,
kummenti, tħassib?

754
00:34:38,560 --> 00:34:39,515
Naħseb li dan il-għalf huwa affaxxinanti.

755
00:34:39,515 --> 00:34:41,500
Hija ispirati lili biex jitgħallmu aktar.

756
00:34:41,500 --> 00:34:44,980
I jirrakkomanda ħafna, jekk int interessat
fil-livelli kollha fuq KEFA, tkellem lili.

757
00:34:44,980 --> 00:34:50,250
Anke jekk jien Istudji Soċjali
Konċentratur, jien CS, sekondarja, hekk

758
00:34:50,250 --> 00:34:52,340
I għadhom jafu ftit.

759
00:34:52,340 --> 00:34:53,810
Imma I ċertament taf liema
klassijiet għandek tieħu.

760
00:34:53,810 --> 00:34:57,940
Naħseb dan kollu tassew interessanti,
u I ninkoraġġukom, ċertament, li

761
00:34:57,940 --> 00:35:00,330
jitgħallmu aktar jekk int interessat.

762
00:35:00,330 --> 00:35:02,090
>> OK, għandi ħaġa waħda finali.

763
00:35:02,090 --> 00:35:05,530

764
00:35:05,530 --> 00:35:05,870
Jiddispjacini.

765
00:35:05,870 --> 00:35:06,460
Kwalunkwe mistoqsijiet?

766
00:35:06,460 --> 00:35:10,010
I ma nieqaf tistenna jekk xi ħadd
kellha xi mistoqsijiet dwar dan.

767
00:35:10,010 --> 00:35:13,220

768
00:35:13,220 --> 00:35:16,900
>> Huwa xi ħadd se tkun
a konċentratur CS?

769
00:35:16,900 --> 00:35:18,580
Jew taħseb dwar dan?

770
00:35:18,580 --> 00:35:20,730
Wieħed, tnejn, tlieta, erbgħa.

771
00:35:20,730 --> 00:35:21,620
Wieħed - biss wieħed.

772
00:35:21,620 --> 00:35:24,680
Anna huwa l-idejn biss li l-
mqajma awtorevoli.

773
00:35:24,680 --> 00:35:27,640

774
00:35:27,640 --> 00:35:29,390
OK, dan huwa jibred.

775
00:35:29,390 --> 00:35:30,110
Assam, liema huma inti se tagħmel?

776
00:35:30,110 --> 00:35:33,220
>> UDJENZA: [inaudible].

777
00:35:33,220 --> 00:35:33,910
>> SPEAKER: Constantine?

778
00:35:33,910 --> 00:35:34,990
>> UDJENZA: Fiżika.

779
00:35:34,990 --> 00:35:36,720
>> SPEAKER: Whoa, li kien mgħaġġel.

780
00:35:36,720 --> 00:35:40,770
You kellhom esperjenza ħażina fl CS50?

781
00:35:40,770 --> 00:35:42,015
[Inaudible], liema huma inti se tagħmel?

782
00:35:42,015 --> 00:35:42,980
>> UDJENZA: Għandi l-ebda idea.

783
00:35:42,980 --> 00:35:43,924
>> SPEAKER: Curt?

784
00:35:43,924 --> 00:35:45,900
>> UDJENZA: Econ jew CS.

785
00:35:45,900 --> 00:35:46,910
>> SPEAKER: Econ jew CS.

786
00:35:46,910 --> 00:35:47,840
Tom?

787
00:35:47,840 --> 00:35:48,385
>> UDJENZA: jien tagħmel Stat.

788
00:35:48,385 --> 00:35:48,950
>> SPEAKER: Stat?

789
00:35:48,950 --> 00:35:50,100
OK.

790
00:35:50,100 --> 00:35:51,000
X'Ser?

791
00:35:51,000 --> 00:35:51,310
>> UDJENZA: Me?

792
00:35:51,310 --> 00:35:51,750
>> SPEAKER: Yeah.

793
00:35:51,750 --> 00:35:52,190
>> UDJENZA: Stat.

794
00:35:52,190 --> 00:35:52,520
>> SPEAKER: Stat.

795
00:35:52,520 --> 00:35:53,500
Oh, hemm inti tmur.

796
00:35:53,500 --> 00:35:55,200
Tom, kellem lit-Alden.

797
00:35:55,200 --> 00:35:56,932
Emily, liema huma inti?

798
00:35:56,932 --> 00:35:57,396
>> UDJENZA: Bijomedika -

799
00:35:57,396 --> 00:36:00,178
>> SPEAKER: Inti f'din it-taqsima?

800
00:36:00,178 --> 00:36:03,040
>> UDJENZA: Le

801
00:36:03,040 --> 00:36:04,530
>> SPEAKER: OK, dan huwa Emily.

802
00:36:04,530 --> 00:36:05,670
Hi ħabib tiegħi.

803
00:36:05,670 --> 00:36:10,080
B'mod ċar mhix tajba ta 'ħabib,
għaliex hi tagħti me a hard time.

804
00:36:10,080 --> 00:36:13,223
Inti tista 'tkun nicer lili quddiem
ta 'kulħadd, student tiegħi -

805
00:36:13,223 --> 00:36:14,580
>> UDJENZA: jien tagħmel gwida Q tiegħek.

806
00:36:14,580 --> 00:36:14,870
>> SPEAKER: Really?

807
00:36:14,870 --> 00:36:15,510
Uh oh.

808
00:36:15,510 --> 00:36:17,224
OK, int aqwa.

809
00:36:17,224 --> 00:36:19,380
I love you daqshekk.

810
00:36:19,380 --> 00:36:20,600
Oh boy.

811
00:36:20,600 --> 00:36:28,320
>> Xorta waħda, I, l-aħħar bil-lejl,
bħal kollox -

812
00:36:28,320 --> 00:36:32,220
Jien ċert kulħadd jidher verament
saħaq dritt issa.

813
00:36:32,220 --> 00:36:35,970
I do not know, huma freshman - huma
inti guys tħossok enfasizzat?

814
00:36:35,970 --> 00:36:36,855
Jien tħossok enfasizzat.

815
00:36:36,855 --> 00:36:37,980
Kien simili, inti tmur id-dar
għall Thanksgiving.

816
00:36:37,980 --> 00:36:40,660
Int simili, jien ser
tagħmel dawn l-affarijiet.

817
00:36:40,660 --> 00:36:41,530
>> UDJENZA: Huwa tant differenti.

818
00:36:41,530 --> 00:36:42,560
>> SPEAKER: Yeah, u inti terga 'lura.

819
00:36:42,560 --> 00:36:45,290
Jeff, ma tħossokx li mod?

820
00:36:45,290 --> 00:36:46,610
>> UDJENZA: I maħsub biss
I d tagħmel ftit.

821
00:36:46,610 --> 00:36:48,660
>> SPEAKER: OK, kbir.

822
00:36:48,660 --> 00:36:51,650
So I come back, u jien ma
jsir xejn.

823
00:36:51,650 --> 00:36:53,260
U dan kollu super stressanti.

824
00:36:53,260 --> 00:36:55,640
U jien kkonċernati, ġenwinament kkonċernati,
dwar jekk jew le jien

825
00:36:55,640 --> 00:36:57,380
se jintemm kollox I jkollhom.

826
00:36:57,380 --> 00:37:01,750
Iżda aħħar lejl, I ma kienx enfasizzat,
I kien biss ftit imdejjaq.

827
00:37:01,750 --> 00:37:04,520
So I kiteb fil-ġurnal tiegħi dwar
dak I kien imdejjaq dwar.

828
00:37:04,520 --> 00:37:08,020
And I kien imdejjaq dwar din it-taqsima
f'din il-klassi wasal biex jintemm.

829
00:37:08,020 --> 00:37:11,100
>> So I kien biss jmorru biex taqra għalik guys
snippet ftit ta 'ġurnal tiegħi,

830
00:37:11,100 --> 00:37:12,950
mill-aħħar lejl.

831
00:37:12,950 --> 00:37:17,400
Nista 'nikseb xi srievet,
f'xi tessuti minn Tom?

832
00:37:17,400 --> 00:37:18,040
Le, jien ser cry.

833
00:37:18,040 --> 00:37:19,720
I ma cry.

834
00:37:19,720 --> 00:37:22,030
Mhux li inti ma tistax cry,
I biss ma cry.

835
00:37:22,030 --> 00:37:24,040
I do not know anki jekk tear tiegħi
glandoli maħduma - tubi tad-dmugħ.

836
00:37:24,040 --> 00:37:25,630
I ma cried fi żmien twil.

837
00:37:25,630 --> 00:37:26,510
>> UDJENZA: [inaudible].

838
00:37:26,510 --> 00:37:28,920
>> SPEAKER: OK, grazzi.

839
00:37:28,920 --> 00:37:30,070
OK, hemm prefazju ftit -

840
00:37:30,070 --> 00:37:32,480
hemm xi partijiet oħra tal-ġurnal tiegħi
dħul, minħabba I jippruvaw ġurnal kull

841
00:37:32,480 --> 00:37:33,600
lejl qabel I ltqajna fis-sodda.

842
00:37:33,600 --> 00:37:34,900
I jirrakkomanda ħafna journaling.

843
00:37:34,900 --> 00:37:38,600
Hija tgħin inti proċess affarijiet, u wkoll
jkunu apprezzaw ħafna tal-ġurnata tiegħek.

844
00:37:38,600 --> 00:37:43,063
U jagħmilha ħafna aktar faċli biex tfittex
lura fuq ġurnata tiegħek u tirrealizza li

845
00:37:43,063 --> 00:37:44,240
kien hemm ħafna ta 'tajba
affarijiet li ġara.

846
00:37:44,240 --> 00:37:47,240
Anke jekk tħossok verament enfasizzat
bil-lejl jew verament mqalleb, jew

847
00:37:47,240 --> 00:37:49,022
verament imdejjaq jew għajjien.

848
00:37:49,022 --> 00:37:50,272
>> Oh, my god.

849
00:37:50,272 --> 00:37:52,546

850
00:37:52,546 --> 00:37:54,400
I lanqas biss jafu jekk huwa bil-miktub li
ukoll minħabba I ma proofread.

851
00:37:54,400 --> 00:37:55,780
Iżda aħna ser taqrah.

852
00:37:55,780 --> 00:37:59,950
I normalment ma taqra tiegħi
ġurnal, ovvjament.

853
00:37:59,950 --> 00:38:03,720
>> "Għada, I ser jgħallmu finali tiegħi
Taqsima CS50 tas-sena.

854
00:38:03,720 --> 00:38:05,860
Huwa crazy kif fast time dubbien.

855
00:38:05,860 --> 00:38:09,900
Madankollu, jien milquta minn kemm differenti
esperjenza tiegħi tagħlim din is-sena kien

856
00:38:09,900 --> 00:38:11,365
milli meta I kien sophomore.

857
00:38:11,365 --> 00:38:14,120
Għall starters, I definitely
jafu l-materjal aħjar.

858
00:38:14,120 --> 00:38:16,820
Imma ma tgħid ewwel koorti tiegħi
ta 'studenti li.

859
00:38:16,820 --> 00:38:20,030
Aktar importanti, madankollu, I realizzati
li l-ferħ li tiġi minn pożizzjoni

860
00:38:20,030 --> 00:38:23,160
fil quddiem ta 'kamra ta' dak li jibda
bħala barranin, imma jispiċċa bħala, fil-

861
00:38:23,160 --> 00:38:27,150
inqas, ħbieb Facebook, huwa
mhux fluke-ewwel sena.

862
00:38:27,150 --> 00:38:29,970
Pjuttost, huwa minn jafu li,
xi mod żgħir, int tgħin

863
00:38:29,970 --> 00:38:32,980
talent, maħsub, delightful, u
nies passjonat jitgħallmu ftit aktar

864
00:38:32,980 --> 00:38:34,750
dwar ix-xjenza tal-kompjuter.

865
00:38:34,750 --> 00:38:37,480
>> Inti ċaqliq li bozza tad-dawl biss
daqsxejn socket tagħha, b'tali mod li huwa kapaċi

866
00:38:37,480 --> 00:38:42,120
shine isbaħ milli suppost, jew,
seta 'immaġina fil-bidu semestru.

867
00:38:42,120 --> 00:38:45,390
Inti tgħin dawran dawk frowns rasu
isfel u tistaqsi mistoqsijiet li

868
00:38:45,390 --> 00:38:49,240
jipprovdu appoġġ, iżda xorta jippermettu
istudenti biex stand up fuq tagħhom stess.

869
00:38:49,240 --> 00:38:52,190
>> Huwa ċertament mhux eżaġerazzjoni li
jgħidu li din it-taqsima huwa favorit tiegħi

870
00:38:52,190 --> 00:38:53,190
parti tal-ġimgħa.

871
00:38:53,190 --> 00:38:57,930
Jew anki li I taħsibha darbtejn biex ngħid, li l-
kollha, fi 05:30 kull ġimgħa, li jafu

872
00:38:57,930 --> 00:39:00,640
li ser tkun triq twila wisq
sakemm aħna jerġgħu jiltaqgħu.

873
00:39:00,640 --> 00:39:02,740
>> Madankollu, jien oerhört thankful
kulħadd li tani dan

874
00:39:02,740 --> 00:39:05,010
opportunità li jagħtu lura lill-oħrajn.

875
00:39:05,010 --> 00:39:07,340
Biex David, għall-paċenzja tiegħu u l-fiduċja.

876
00:39:07,340 --> 00:39:11,040
Biex film u l-produzzjoni l-ekwipaġġ, għall-
jagħmlu me ħarsa kemmxejn rispettabbli.

877
00:39:11,040 --> 00:39:15,380
U, aktar importanti, għall-istudenti tiegħi,
mingħajr min I d jkollhom ebda raġuni biex

878
00:39:15,380 --> 00:39:17,890
jonfqu 10 siegħa jidhru l-aħjar
mod kif jinstilet pointers, jew jistabbilixxu l-

879
00:39:17,890 --> 00:39:20,330
tabella ta 'delfini, permezz JavaScript.

880
00:39:20,330 --> 00:39:22,620
Bħal dejjem, huwa kien barka. "

881
00:39:22,620 --> 00:39:25,420
>> Allura ma 'dan, nirringrazzjak guys.

882
00:39:25,420 --> 00:39:29,000
I ser tara int kollha fl-CS50 ġust, u
l hackathon, jekk int hemm.

883
00:39:29,000 --> 00:39:32,020
U jekk ikollok aktar mistoqsijiet, jien ser twaħħal
madwar sakemm ma jkunx hemm aktar.

884
00:39:32,020 --> 00:39:33,760
Imma jien nirringrazzjak guys għal
sena mill-isbaħ.

885
00:39:33,760 --> 00:39:37,290
>> [Applause]

886
00:39:37,290 --> 00:39:38,540
>> SPEAKER: I jista cry.

887
00:39:38,540 --> 00:39:40,800