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>> [Daqq tal-mużika]

2
00:00:03,290 --> 00:00:04,989

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JASON Hirschhorn: OK, kulħadd.

4
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Merħba għas-Sezzjoni.

5
00:00:07,460 --> 00:00:10,840
Dan huwa CS50, ħafna tagħna
ewwel taqsima super.

6
00:00:10,840 --> 00:00:13,700
As you know kollha, ġimgħa d-dieħla
sezzjonijiet regolari se tibda,

7
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iżda din il-ġimgħa aħna qed kollha flimkien.

8
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>> Hemm myself.

9
00:00:17,730 --> 00:00:18,840
Jisimni Jason.

10
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Jien lecturer fil-Computer Science.

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00:00:20,630 --> 00:00:23,910
Għandna Andi, li hija l-kap TA tat CS50.

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U Scaz, Professur Brian Scassellati,
hu professur fil-Computer Science.

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>> Aħna l-CS50 kapijiet fil Yale.

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Inti tista 'dejjem email
us heads@cs50.yale.edu.

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Aħna se jkun fil lectures.

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Aħna ser tkun fil-ħinijiet tal-uffiċċju.

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Jekk hemm qatt xi ħaġa li nistgħu
jagħmel għalik, xejn għandek bżonn,

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tħossok liberu li jilħqu lilna.

19
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>> Allura dak li aħna se jagħmlu llum?

20
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Jew qabel dakinhar, x'hemm
ġejjin up din il-ġimgħa?

21
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Allura ħinijiet tal-uffiċċju huma Tnejn, it-Tlieta,
L-Erbgħa, il-Ħamis u, 8:00-11:00.

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Hemm skeda fuq il-websajt.

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>> Sezzjonijiet, bħal semmejt,
qed jibdew il-ġimgħa d-dieħla.

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U inti ser issib din il-ġimgħa dak
żmien l taqsima tiegħek, f'liema ġurnata huwa,

25
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u li AT tiegħek.

26
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>> Problema Set 1 huwa dovut fil nhar ta 'Ħamis
nofsinhar, il-Ġimgħa f'nofsinhar bil-ġurnata tard.

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Iva, inti għandek disat ijiem tard.

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U hemm disa 'settijiet problema.

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U jistgħu jużaw waħda biss
ġurnata tard kull sett problema.

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Iva, fil-fatt, kollha problema
settijiet huma dovuti il-ġimgħa f'nofsinhar.

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Li hija kollha.

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Dak kollu li dettalji huma fuq il-sillabu.

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>> Kull Ġimgħa, għandna ikliet.

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Aħna nixtiequ li tagħmel dan kbar
kors tħoss daqsxejn iżgħar.

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Allura inti qed jilqgħu biex RSVP.

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Ikla b'xejn ma 'sħabi
klassi u l-persunal.

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cs50.yale.edu/rsvp.

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>> Kollha ta 'dawn l-affarijiet li
I jkollhom fuq l-iskrin,

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u aktar, inti tista 'ssib cs50.yale.edu jew
cs50.harvard.edu, jekk inti tmur biex Harvard

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u qed jaraw dan online.

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>> Wkoll fuq dawn il-websajts, hemm
ton ta 'riżorsi għalik.

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Kull lecture mhux biss għandha l-video
tal-lecture, iżda jinnota wkoll.

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Xi ħadd se tara l-
lecture u jieħdu noti għalik.

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Allura inti tista 'sempliċiment iħallsu
attenzjoni waqt lectures,

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jew tista 'tuża noti tagħhom / tagħna
jinnota li jissupplimentaw noti tiegħek stess.

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>> Hemm slides online.

47
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Is-sors code-- kollox
David tmur fuq fil lecture,

48
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jew Scaz tmur fuq lecture, li
kodiċi ta 'sors disponibbli online

49
00:02:09,979 --> 00:02:11,750
kif ukoll, kif bħal I, videos imsemmi.

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00:02:11,750 --> 00:02:14,257
>> Sezzjonijiet, bl-istess mod, kollha se jkunu iffilmjati.

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00:02:14,257 --> 00:02:15,840
Kollha ta 'dawk slajds se jkunu disponibbli.

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Kollha ta 'dan il-kodiċi se
jkun disponibbli għalik.

53
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Hemm xorts fuq il-websajt fejn
Membri tal-persunal CS50 jonfqu ħames sa 10

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minuti għaddejjin suġġetti għalik.

55
00:02:24,130 --> 00:02:26,750
Xi wħud minn dawk inti stajt diġà
jiltaqgħu magħhom f'settijiet problema.

56
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>> Ħinijiet tal-uffiċċju, kif semmejt, Tnejn
permezz Ħamis, 8:00 għal 11:00.

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Studju CS50 huwa riżorsa meraviljuż.

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Hemm problemi prattika,
slides kampjun, bugs magħrufa

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li l-istudenti simili li jinżel fit-
għal essenzjalment kull suġġett aħna

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se tkopri f'dan il-kors.

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>> U fl-aħħarnett, fuq dan slide
għall-inqas, Reference50

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li tagħtik informazzjoni
fuq il-funzjonijiet kollha C

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inti tista 'qatt possibilment tama
biex jintużaw u ħafna, ħafna aktar.

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>> Għal darb'oħra, li dot dot dot fil
il-qiegħ tal-iskrin

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huwa li jindika li hemm anke
aktar riżorsi fuq dawn iż-żewġ websajts:

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cs50.yale.edu, cs50.harvard.edu.

67
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>> Allura, dak li qed nagħmlu llum?

68
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Ukoll, qabel jien ser jagħti
inti tħares lejn ir-riżorsi.

69
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Diġà għamlet dan wieħed.

70
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Ħares lejn us.

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>> Issa, aħna qed tmur biex jmorru fuq
tipi ta 'data u operaturi C.

72
00:03:16,430 --> 00:03:19,990
Imbagħad Andi se toħroġ hawn u
jmorru fuq libreriji fl C, printf (),

73
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funzjoni li magħhom inti diġà
familjari jew se jsiru malajr ħafna

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familjari.

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00:03:25,530 --> 00:03:27,810
U tkun taf ukoll tmur fuq
conditionals u loops.

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>> U mbagħad finalment, Scaz
se jmorru fuq il-ID CS50.

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Jekk int ma dove fil
diġà Problem Set 1,

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kif ukoll kif tuża l-
terminali u utli kmandi

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u mbagħad jagħtuk xi demos u
prattika kodifikazzjoni fil-ID CS50.

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>> Qabel I Mur fil għal dan
kontenut fuq din in-naħa,

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ma xi ħadd xi mistoqsijiet s'issa?

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Great.

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KOLLOX SEW.

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Nibdlu gerijiet.

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>> [JINBIDLU APPARAT]

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>> Dan kien me ċaqliq
gearijiet karozza manwali.

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00:04:03,070 --> 00:04:10,920
Allura tipi ta 'data fis-C, inti tista' mhux biss għandhom
varjabbli x u li hija tkun fuq il-linja 10,

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integer, forsi in-numru 1,
fuq il-linja 20, numru deċimali 10.5,

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u linji imbagħad koppja
wara string, I imħabba CS50.

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>> Fil C, varjabbli tista 'tkun biss
ħaġa waħda, u ħaġa waħda biss.

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U hekk ikollok biex jagħtuhom tipi.

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U fuq dan il-bord, aħna
jkollhom lista ta 'tipi.

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Hemm Chars, li
toqgħod għal karattri.

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Allura dak ittra waħda A, B, C,
D. Dan jista 'jkun ukoll spazju,

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jew li jistgħu wkoll ikunu
karattru linja ġdida.

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>> Hemm interi, li huma biss
numri, numbers-- sħaħ jew interi

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00:04:45,030 --> 00:04:47,130
rather-- iżda mhux deċimali.

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>> Għal deċimali, għandna
f'wiċċ l-ilma punt numri.

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00:04:49,790 --> 00:04:53,200
Floating punt numri
huma numri bil deċimali.

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00:04:53,200 --> 00:04:58,160
>> Imbagħad hemm twal, li huma
interi essenzjalment itwal.

102
00:04:58,160 --> 00:05:01,160
Int ser ikollok avviż li fit
huwa ta '8 billi int huwa 4.

103
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I ser jiksbu għal dak fit-tieni.

104
00:05:02,640 --> 00:05:07,390
Dak għax twal jista 'jaħżen saħansitra
interi aktar minn int jista 'jaħżen.

105
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Double huwa float twil.

106
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>> U fl-aħħarnett, aħna għandna
spag, li huwa tip

107
00:05:12,460 --> 00:05:14,430
li probabilment ikollok użati qabel.

108
00:05:14,430 --> 00:05:21,100
Jekk inti jinkludu hashtag
# includeCS50.h fil-fajl sors tiegħek,

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allura inti tista 'tuża tip string.

110
00:05:23,170 --> 00:05:25,560
Mhuwiex effettivament mibnija fis C.

111
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>> Hemm koppja tipi oħrajn ukoll.

112
00:05:27,760 --> 00:05:32,900
Iżda dawn huma dawk prinċipali mal
li int ser tuża u jiltaqgħu.

113
00:05:32,900 --> 00:05:36,210
C kif, għal darb'oħra semmejt,
kull variable-- dan

114
00:05:36,210 --> 00:05:38,620
tista 'tkun biss tip wieħed u tip wieħed biss.

115
00:05:38,620 --> 00:05:42,890
Dan għaliex C hija statikament
lingwa ttajpjata, għall-kuntrarju

116
00:05:42,890 --> 00:05:45,780
għal-lingwi dinamiku ittajpjat
fejn jekk inti toħloq varjabbli

117
00:05:45,780 --> 00:05:50,081
tista 'tbiddel x'hemm maħżuna
bħala inti tmur fuq fil-programm tiegħek.

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Minn hawn fuq il-lemin
naħa, għandi l daqsijiet differenti

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00:05:52,580 --> 00:05:57,440
ta 'dawn it-tipi ta' data fil bytes.

120
00:05:57,440 --> 00:05:59,710
Allura karattru huwa 1 byte.

121
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C'est 8 bits.

122
00:06:01,250 --> 00:06:05,530
U dan ifisser minħabba 8
bits hemm tmien 0s u 1s.

123
00:06:05,530 --> 00:06:08,280
Rajna dawk demos fl-ewwel
ġimgħa ma 'dak basal binarja.

124
00:06:08,280 --> 00:06:15,680
>> Bil 8 bits jew 1 byte, nistgħu
jirrappreżentaw numri 0-255.

125
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Dritt.

126
00:06:16,180 --> 00:06:18,770
Jekk bits kollha 8 huma 0 thats 0.

127
00:06:18,770 --> 00:06:23,640
Jekk l-ewwel ftit huwa 1, dak l-għadd
waħda, u l-bqija, it-triq kollha sa 255.

128
00:06:23,640 --> 00:06:28,290
U hu għalhekk li għall-karattri inti tista
għandhom essenzjalment sa 255 minnhom,

129
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iżda li ħafna biex ikopru l
l-karattri għandna bżonn l-użu.

130
00:06:31,210 --> 00:06:38,060
>> Għal interi, inti jista 'jkollhom 0 u
imbagħad inti għandek 2 għall-32 minus 1.

131
00:06:38,060 --> 00:06:40,340
Dawk huma kif ħafna għażliet
għandek għall-interi.

132
00:06:40,340 --> 00:06:44,780
>> Għal twil, inti għandek 0
2 għall-64 minus 1.

133
00:06:44,780 --> 00:06:48,860
Allura inti għandek ħafna, ħafna,
aktar għażliet għall twal.

134
00:06:48,860 --> 00:06:54,220
>> Kordi, li l-kwistjoni mark
għaliex li l-cliffhanger għal aktar tard.

135
00:06:54,220 --> 00:06:55,000
Yeah.

136
00:06:55,000 --> 00:06:56,350
I setax jgħid kulħadd
fuq it-tarf tas-sedil tagħhom,

137
00:06:56,350 --> 00:06:57,450
bħal dak li kwistjoni mark?

138
00:06:57,450 --> 00:06:58,390
Huwa cliffhanger.

139
00:06:58,390 --> 00:07:02,340
Aħna eventwalment se jkopri d-daqs tal
kordi u jitkellmu aktar dwar kordi.

140
00:07:02,340 --> 00:07:04,692
Minħabba string huwa attwalment
wieħed mill-roti ta 'taħriġ

141
00:07:04,692 --> 00:07:06,400
nitfgħu fuq f'dan
Naturalment fil-bidu

142
00:07:06,400 --> 00:07:09,700
u mbagħad tluq aktar tard
fuq, minħabba kordi fis-C

143
00:07:09,700 --> 00:07:13,320
huma attwalment pointers
li arrays karattru.

144
00:07:13,320 --> 00:07:15,810
Iżda għal darb'oħra, li l-
cliffhanger għal aktar tard.

145
00:07:15,810 --> 00:07:18,890
Qabel I jimxu fuq xi mistoqsijiet,
kummenti, tħassib dwar din slide?

146
00:07:18,890 --> 00:07:25,800

147
00:07:25,800 --> 00:07:26,630
>> KOLLOX SEW.

148
00:07:26,630 --> 00:07:30,330
I trid tkun spjegatur meraviljuż.

149
00:07:30,330 --> 00:07:33,210
Ukoll meta inti qed programmazzjoni,
int ser tuża dawn l-operaturi.

150
00:07:33,210 --> 00:07:36,730
Sinjali verament sempliċi li tista 'tagħmel sempliċi
operazzjonijiet, li magħhom int probabilment

151
00:07:36,730 --> 00:07:38,340
diġà familjari ħafna.

152
00:07:38,340 --> 00:07:42,580
>> Per eżempju, fuq il-lemin
naħa tal-lemin, naraw żid.

153
00:07:42,580 --> 00:07:44,640
Biex iżżid, inti biss tagħmel sinjal Plus.

154
00:07:44,640 --> 00:07:46,850
U għalhekk inti jista 'jkollok
żewġ varjabbli xuy.

155
00:07:46,850 --> 00:07:48,810
Tista 'tagħmel x + y fil-kodiċi tiegħek.

156
00:07:48,810 --> 00:07:52,790
Forsi inti tixtieq to-- tgħidli int
jkollhom in-numru 7 u 3,

157
00:07:52,790 --> 00:07:55,780
inti tixtieq li taħżen li
fil-varjabbli imsejjaħ somma.

158
00:07:55,780 --> 00:08:03,010
Tista 'tagħmel int għat-tip, l-ispazju
somma, l-isem tal-varjabbli, = 7 + 3;

159
00:08:03,010 --> 00:08:05,780
>> Xi jkun li jaħżen fil somma?

160
00:08:05,780 --> 00:08:07,190
Kulħadd?

161
00:08:07,190 --> 00:08:09,270
Jekk kelli fil somma = 7 + 3.

162
00:08:09,270 --> 00:08:10,437
Dak li jkun maħżun fil somma?

163
00:08:10,437 --> 00:08:11,520
Tista 'biss shout out.

164
00:08:11,520 --> 00:08:12,120
UDJENZA: 10.

165
00:08:12,120 --> 00:08:12,995
>> JASON Hirschhorn: 10!

166
00:08:12,995 --> 00:08:14,870
Dan huwa eżattament id-dritt.

167
00:08:14,870 --> 00:08:19,520
What about fil somma = 7-3,
I biss użu dan is-sinjal sing.

168
00:08:19,520 --> 00:08:20,871
X'inhu għaddej li jiġu maħżuna?

169
00:08:20,871 --> 00:08:21,370
UDJENZA: 4.

170
00:08:21,370 --> 00:08:22,203
JASON Hirschhorn: 4.

171
00:08:22,203 --> 00:08:25,770
Somma huwa probabbilment l-isem ħażin għall
dak il-varjabbli, imma 4 tkun maħżuna.

172
00:08:25,770 --> 00:08:31,890
>> Li jimmultiplikaw fis-C, uża l-ftit
Karattru Star, inti ma tuża x.

173
00:08:31,890 --> 00:08:35,990
Li jaqsam, uża Forward
Slash mhux is-simbolu diviżjoni.

174
00:08:35,990 --> 00:08:39,580
U biex modulo, jintuża s-simbolu Perċentwali.

175
00:08:39,580 --> 00:08:47,900
>> Mela ejja ngħidu Irrid nara int z =
7% 3, dak li jkun maħżun fil z?

176
00:08:47,900 --> 00:08:51,250
Allura, dan huwa essenzjalment
tistaqsi liema ma modulo do?

177
00:08:51,250 --> 00:08:52,750
Ħadd ma jaf liema modulo ma?

178
00:08:52,750 --> 00:08:53,940
Yeah.

179
00:08:53,940 --> 00:08:54,870
y 4.

180
00:08:54,870 --> 00:08:56,120
SPEAKER 1: Hu l-bqija.

181
00:08:56,120 --> 00:08:58,369
JASON Hirschhorn: Huwa l-
bqija meta inti jaqsmu.

182
00:08:58,369 --> 00:09:02,790
Allura 7 diviż bl 3 hija ta '2 kumplament 1.

183
00:09:02,790 --> 00:09:04,690
Allura 1 tkun maħżuna.

184
00:09:04,690 --> 00:09:06,970
>> Inti ma tnaqqis,
imma li kif taħdem.

185
00:09:06,970 --> 00:09:09,140
Dak hu l-operatur modulo ma.

186
00:09:09,140 --> 00:09:12,360
Huwa jieħu numru jaqsam lilha mill
numru ieħor u prospetti lilek

187
00:09:12,360 --> 00:09:14,590
il-bqija.

188
00:09:14,590 --> 00:09:19,770
Għalhekk għal darb'oħra, 7% 3 tagħtik 1, minħabba
7 diviża bi 3 huwa 2 kumplament 1,

189
00:09:19,770 --> 00:09:21,650
u jirritorna l-bqija.

190
00:09:21,650 --> 00:09:24,470
>> What about ejja mmorru lura up
pass wieħed biex dan is-sinjal diviżjoni.

191
00:09:24,470 --> 00:09:29,194
Jekk jien ma 7 / diviż bil 3 ma
xi ħadd jaf liema dan se jerġa 'lura?

192
00:09:29,194 --> 00:09:30,090
>> SPEAKER 2: 2.

193
00:09:30,090 --> 00:09:32,240
>> JASON Hirschhorn: Għaliex 2 u mhux 2.333?

194
00:09:32,240 --> 00:09:34,560
>> SPEAKER 2: Naħseb li qatgħat
off wara n-numru sħiħ.

195
00:09:34,560 --> 00:09:36,310
JASON Hirschhorn: So
dan huwa eżattament id-dritt.

196
00:09:36,310 --> 00:09:39,880
Fil C, jekk inti tagħmel diviżjoni ta '
żewġ numri interi 7 diviż bi 3,

197
00:09:39,880 --> 00:09:43,430
jiġrilha-risposta li
f'dan il-każ 2.3333 għal dejjem

198
00:09:43,430 --> 00:09:47,080
u issib li punt deċimali u
Chops kollox off wara l-deċimali

199
00:09:47,080 --> 00:09:49,240
u jirritorna inti 2.

200
00:09:49,240 --> 00:09:51,120
>> Mela jekk jien għamilt 8 diviż bil 3.

201
00:09:51,120 --> 00:09:54,010
Li attwalment, nafu
li jirritornaw 2.666,

202
00:09:54,010 --> 00:09:57,050
iżda Chops kollox off
l-deċimali, taqta 'dan kollu,

203
00:09:57,050 --> 00:09:58,640
u jirritorna lilek 2.

204
00:09:58,640 --> 00:10:02,090
Allura 6 diviż bil 3, 7 maqsuma
bi 3, 8 diviża bi 3,

205
00:10:02,090 --> 00:10:04,840
huma kollha ser jirritornaw lilek 2.

206
00:10:04,840 --> 00:10:08,770
>> Ħadd ma jaf, jew ikollhom raden,
kif I jistgħu attwalment jiksbu

207
00:10:08,770 --> 00:10:10,790
ir-risposta sħiħa jekk irrid li deċimali?

208
00:10:10,790 --> 00:10:13,120

209
00:10:13,120 --> 00:10:13,620
Yeah.

210
00:10:13,620 --> 00:10:14,152
Jimxi 'l quddiem.

211
00:10:14,152 --> 00:10:15,110
SPEAKER 3: Uża float?

212
00:10:15,110 --> 00:10:16,942
JASON Hirschhorn: X'tifhem?

213
00:10:16,942 --> 00:10:19,786
SPEAKER 3: Għaliex inti qal li l-
float huwa għal numri [inaudible]

214
00:10:19,786 --> 00:10:22,900

215
00:10:22,900 --> 00:10:23,900
JASON Hirschhorn: Dritt.

216
00:10:23,900 --> 00:10:26,100
Allura, dan huwa eżattament id-dritt.

217
00:10:26,100 --> 00:10:28,440
7 huwa integer.

218
00:10:28,440 --> 00:10:31,690
Imma jekk jien ridt li tibdel din
f'numru b'punt li jvarja,

219
00:10:31,690 --> 00:10:34,674
I jkollhom jaħżnu dik
kif 7.0 minħabba li l-kompjuter

220
00:10:34,674 --> 00:10:37,090
huwa verament stupid-- rajna li
mal-PB u J example--

221
00:10:37,090 --> 00:10:38,930
se biss tagħmel eżattament
dak li tgħid dan.

222
00:10:38,930 --> 00:10:40,846
>> Mela jekk inti tikteb 7, it
jaħsbu li l integer.

223
00:10:40,846 --> 00:10:43,640
Jekk inti tikteb 7.0, anke jekk aħna
taf dawk l-affarijiet huma ekwivalenti,

224
00:10:43,640 --> 00:10:45,550
tittratta li bħal
punt numru f'wiċċ l-ilma.

225
00:10:45,550 --> 00:10:50,441
Mela jekk inti ma 7.0 maqsuma
bi 3, jew diviż 3.0,

226
00:10:50,441 --> 00:10:52,440
dan ngħid, OK, issa
aħna qed jittrattaw ma 'flowts.

227
00:10:52,440 --> 00:10:57,514
I se terġa 'lura lilek 2.333333 għal dejjem.

228
00:10:57,514 --> 00:10:59,930
Iżda mhux verament dejjem, għax
kif rajna wkoll lecture,

229
00:10:59,930 --> 00:11:03,350
dawn in-numri punt f'wiċċ l-ilma
mhumiex eżattament preċiżi.

230
00:11:03,350 --> 00:11:05,940
>> Mela jekk inti tagħmel tixtieq li deċimali,
jew parti ta 'dak deċimali,

231
00:11:05,940 --> 00:11:08,090
imbagħad inti għandek use-- waħda minnhom
għandu jkun hemm numru b'punt li jvarja

232
00:11:08,090 --> 00:11:11,048
u l-kompjuter irid jifhem
li dan huwa punt floating int

233
00:11:11,048 --> 00:11:13,350
jittrattaw, mhux numru sħiħ.

234
00:11:13,350 --> 00:11:16,760
Kwalunkwe mistoqsijiet dwar dik it-tabella fuq
il-lemin, s'issa?

235
00:11:16,760 --> 00:11:22,650
Jew in-naħa tiegħek naħa tax-xellug, tiegħek
xellug, in-naħa tiegħek xellug.

236
00:11:22,650 --> 00:11:23,264
Yeah.

237
00:11:23,264 --> 00:11:23,972
SPEAKER 4: Dritt.

238
00:11:23,972 --> 00:11:26,216
Għal bħad regolari
interi, inti

239
00:11:26,216 --> 00:11:30,230
write-- kieku inti għandek tikteb float?

240
00:11:30,230 --> 00:11:31,920
>> JASON Hirschhorn: Yeah hekk.

241
00:11:31,920 --> 00:11:34,400
Ukoll, jekk inti tixtieq li toħloq
varjabbli li l-float,

242
00:11:34,400 --> 00:11:37,020
ikollok bżonn li jgħidu float
z ugwali xi ħaġa.

243
00:11:37,020 --> 00:11:37,640
>> SPEAKER 4: OK.

244
00:11:37,640 --> 00:11:41,950
>> JASON Hirschhorn: Imma jekk jien ridt li
do 7 diviż bil 3 u nikseb li deċimali,

245
00:11:41,950 --> 00:11:48,540
Jien kont nagħmel float z = 7.0 / bi 3.0; u
li jagħti lili l-b'punt li jvarja

246
00:11:48,540 --> 00:11:49,273
Numru.

247
00:11:49,273 --> 00:11:50,000
>> SPEAKER 4: OK.

248
00:11:50,000 --> 00:11:56,370
>> JASON Hirschhorn: Jekk I ma
xi ħaġa bħal int z = 7 / bi 3,

249
00:11:56,370 --> 00:12:00,856
li jagħti me numru sħiħ,
għaliex dawn huma kollha interi.

250
00:12:00,856 --> 00:12:01,730
Does li jagħmel sens?

251
00:12:01,730 --> 00:12:02,320
>> SPEAKER 4: Iva.

252
00:12:02,320 --> 00:12:02,950
>> JASON Hirschhorn: OK.

253
00:12:02,950 --> 00:12:03,450
Great.

254
00:12:03,450 --> 00:12:06,030
Kwalunkwe mistoqsijiet oħra dwar dik it-tabella?

255
00:12:06,030 --> 00:12:07,220
Really?

256
00:12:07,220 --> 00:12:08,380
Jien hekk eċċitati.

257
00:12:08,380 --> 00:12:09,120
KOLLOX SEW.

258
00:12:09,120 --> 00:12:13,910
>> Allura xi affarijiet oħra li inti ser tuża,
oftentimes f'kundizzjonijiet jew linji,

259
00:12:13,910 --> 00:12:17,580
huma dawn it-tipi ta 'operators--
dawn it-tipi ta 'espressjonijiet Boolean.

260
00:12:17,580 --> 00:12:23,140
U kif aħna tgħallimna, == huwa dak li inti
jużaw biex jiċċekkjaw jekk żewġ affarijiet huma ugwali.

261
00:12:23,140 --> 00:12:28,170
>> So here I am verifika jekk y x ==, ejja
għal darb'oħra jassumi li x hija ta '7 u y hija ta' 3.

262
00:12:28,170 --> 00:12:33,220
Mela jekk jien kiteb 7 == 3, dak
kieku ritorn lejn lili?

263
00:12:33,220 --> 00:12:34,220
Hija li vera jew falza?

264
00:12:34,220 --> 00:12:35,275
>> UDJENZA: False.

265
00:12:35,275 --> 00:12:36,150
JASON Hirschhorn: OK.

266
00:12:36,150 --> 00:12:37,370
Inħoss bħal kulħadd jistgħu jiksbu dan wieħed.

267
00:12:37,370 --> 00:12:39,054
Allura kulħadd, dak li dak tirritorna?

268
00:12:39,054 --> 00:12:39,720
UDJENZA: False.

269
00:12:39,720 --> 00:12:40,130
JASON Hirschhorn: False.

270
00:12:40,130 --> 00:12:40,850
Great.

271
00:12:40,850 --> 00:12:41,930
7 ma tkunx daqs 3.

272
00:12:41,930 --> 00:12:44,530
Allura 7 == 3 se jerġa 'lura falza.

273
00:12:44,530 --> 00:12:50,746
Inti għandek sinjal mhux ugwali, hekk jekk I
ċċekkjati 7! = 3, dak li dak tirritorna?

274
00:12:50,746 --> 00:12:51,370
UDJENZA: True.

275
00:12:51,370 --> 00:12:52,650
JASON Hirschhorn: True.

276
00:12:52,650 --> 00:12:53,200
Eċċellenti.

277
00:12:53,200 --> 00:12:55,990
Xi ħadd kien enfatiku ħafna fil
id-dahar u japprezzaw dak.

278
00:12:55,990 --> 00:12:59,070
Imbagħad għandek inqas minn operatur,
inqas minn jew ugwali għal operatur,

279
00:12:59,070 --> 00:13:01,990
akbar minn operatur, akbar
minn jew ugwali għal operatur.

280
00:13:01,990 --> 00:13:03,490
>> Allura wieħed aktar kontroll sanità.

281
00:13:03,490 --> 00:13:05,660
Jekk kelli 7 huwa akbar
minn jew daqs 3.

282
00:13:05,660 --> 00:13:06,966
X'għandu li tirritorna?

283
00:13:06,966 --> 00:13:07,692
>> UDJENZA: True.

284
00:13:07,692 --> 00:13:08,650
JASON Hirschhorn: True.

285
00:13:08,650 --> 00:13:10,050
Iva.

286
00:13:10,050 --> 00:13:13,290
Dik il-kamra lura, ġenb ta 'wara
tal-kamra, meraviljuż.

287
00:13:13,290 --> 00:13:16,240
Inti tista 'tgħaqqad dawn
espressjonijiet jekk tixtieq, kif ukoll,

288
00:13:16,240 --> 00:13:21,880
bil-loġika u li hija
&& Jew loġika jew li jkun ||

289
00:13:21,880 --> 00:13:22,800
||.

290
00:13:22,800 --> 00:13:25,785
U hekk issa inti tista 'test tnejn
affarijiet together-- Hija li umoristiċi?

291
00:13:25,785 --> 00:13:28,250
Għaliex huwa li umoristiċi?

292
00:13:28,250 --> 00:13:35,200
>> Mela jekk jien ridt, nista 'ngħid huwa 7
akbar minn 3 U 2 ikun anqas minn 4?

293
00:13:35,200 --> 00:13:37,090
Ukoll, jekk 7 huwa akbar
minn 3, dan huwa veru.

294
00:13:37,090 --> 00:13:38,400
2 ikun anqas minn 4, dan huwa veru.

295
00:13:38,400 --> 00:13:41,140
Allura dan ħaġa sħiħa se jerġa 'lura veru.

296
00:13:41,140 --> 00:13:45,130
>> Jekk I ttestjati 7 huwa akbar minn 3 and--
Jien biss picking numri bl-addoċċ here--

297
00:13:45,130 --> 00:13:47,340
4 huwa inqas minn 2, ukoll, li l-foloz.

298
00:13:47,340 --> 00:13:49,610
Allura vera u falza jagħmlu falza.

299
00:13:49,610 --> 00:13:54,520
U inti tista 'tmur fuq u inti jikkombinaw bħala
ħafna kondizzjonijiet flimkien kif inti tixtieq.

300
00:13:54,520 --> 00:14:00,000
>> Ħadd ma jkollu xi mistoqsijiet,
kummenti, tħassib s'issa?

301
00:14:00,000 --> 00:14:03,862
U nara xi wħud minnkom jieħdu stampi
ta 'lili fil-iskrin, li Napprezza.

302
00:14:03,862 --> 00:14:05,070
Nisperaw, mhuwiex Snapchat.

303
00:14:05,070 --> 00:14:06,417
Nisperaw, huwa għall-karti tiegħek.

304
00:14:06,417 --> 00:14:08,500
Imma dawn kollha huma għaddejjin
li tkun disponibbli onlajn.

305
00:14:08,500 --> 00:14:11,210
Allura inti ma għandekx
jieħdu ritratti ta 'dan.

306
00:14:11,210 --> 00:14:15,150
Bħal semmejt, kollox
se jkunu disponibbli online għalik.

307
00:14:15,150 --> 00:14:15,650
KOLLOX SEW.

308
00:14:15,650 --> 00:14:17,980
Jien wasalt biex tikseb
offstage, sabiex ma xi ħadd

309
00:14:17,980 --> 00:14:20,350
trid tgħid xejn
qabel ma dan iseħħ?

310
00:14:20,350 --> 00:14:21,080
Mistoqsijiet?

311
00:14:21,080 --> 00:14:21,680
>> [INTERPOSING VOICES]

312
00:14:21,680 --> 00:14:22,250
>> JASON Hirschhorn: Oh, stop.

313
00:14:22,250 --> 00:14:23,290
Inti guys huma wisq sbieħ.

314
00:14:23,290 --> 00:14:23,790
KOLLOX SEW.

315
00:14:23,790 --> 00:14:26,520
Jien ser tag out.

316
00:14:26,520 --> 00:14:27,240
Tlaqna.

317
00:14:27,240 --> 00:14:29,570
>> ANDI Peng: Aħna ser tagħmel
bidla mic skomdi issa.

318
00:14:29,570 --> 00:14:32,280
>> JASON Hirschhorn: Ninsab
ser jieħdu dan off.

319
00:14:32,280 --> 00:14:33,946
ANDI Peng: Japprezzaw l-appoġġ, guys.

320
00:14:33,946 --> 00:14:42,250

321
00:14:42,250 --> 00:14:43,180
Inti tista 'tisma lili?

322
00:14:43,180 --> 00:14:43,930
Huwa li tajba?

323
00:14:43,930 --> 00:14:44,760
Perfect.

324
00:14:44,760 --> 00:14:45,630
Beautiful.

325
00:14:45,630 --> 00:14:47,490
Let me biss Tuck dik in.

326
00:14:47,490 --> 00:14:49,100
KOLLOX SEW.

327
00:14:49,100 --> 00:14:54,140
Allura, jien waslu biex jagħmlu bħal ġgant
informazzjoni jifqgħu s inti guys dritt issa.

328
00:14:54,140 --> 00:14:57,370
U l-ebda inkwiet tkun xi tkun jekk int
mhux wara kull linja ftit ta 'dak

329
00:14:57,370 --> 00:14:58,812
Li jien ser nuruk.

330
00:14:58,812 --> 00:15:00,770
Kif Jason qal, kollox
huwa kompletament online.

331
00:15:00,770 --> 00:15:03,780
Just aħna qed tmur biex tipprova tintroduċi
kulħadd għall-kunċetti koperti

332
00:15:03,780 --> 00:15:05,270
f'xi wħud minn dawn slides.

333
00:15:05,270 --> 00:15:06,582
Hekk biss isegwu flimkien.

334
00:15:06,582 --> 00:15:09,540
Nru inkwiet jekk inti ma tifhimx
kollox; madankollu, jekk fi kwalunkwe punt

335
00:15:09,540 --> 00:15:12,820
tħossok mitluf, iqajmu tiegħek
idejn, aħna ser tieqaf, l-ebda inkwiet.

336
00:15:12,820 --> 00:15:15,060
Kessaħ.

337
00:15:15,060 --> 00:15:19,270
>> Għalhekk naħseb xi ħaġa li David għandha
diġà tip ta 'msemmi fil lecture

338
00:15:19,270 --> 00:15:23,240
u Jason tip ta 'allużjoni
li llum huwa dak librerija hu.

339
00:15:23,240 --> 00:15:27,510
Allura fl-ipprogrammar, għandna
dawn l-affarijiet imsejħa libreriji.

340
00:15:27,510 --> 00:15:29,690
Fejn, essenzjalment, kollha
huma huwa biss sett

341
00:15:29,690 --> 00:15:32,610
ta 'funzjonijiet, jiġifieri
essenzjalment biss kodiċi li s

342
00:15:32,610 --> 00:15:35,070
diġà ġie miktub minn
xi ħadd ieħor li nistgħu kollha

343
00:15:35,070 --> 00:15:36,410
uża fi żmien programmi tagħna.

344
00:15:36,410 --> 00:15:38,790
>> Allura kif ma normali
xogħol librerija, id-dritt?

345
00:15:38,790 --> 00:15:40,030
Inti tidħol fil-bieb librerija.

346
00:15:40,030 --> 00:15:41,890
Inti għandek dawn kollha
kotba inti tista 'pull out

347
00:15:41,890 --> 00:15:44,590
u inti tista 'aċċess għall-informazzjoni
fi ħdan dawk il-kotba.

348
00:15:44,590 --> 00:15:45,840
L-istess ħaġa fil-programmazzjoni.

349
00:15:45,840 --> 00:15:48,820
>> Inti għandek librerija li diġà
ġew miktuba minn nies oħra.

350
00:15:48,820 --> 00:15:51,530
U l-mod li inti tista ',
bħala programmer jew student,

351
00:15:51,530 --> 00:15:55,780
jistgħu jiksbu aċċess għal dik librerija
huwa permezz #include hashtag.

352
00:15:55,780 --> 00:15:59,720
>> Per eżempju, fis-C aħna
tliet C-- l-aktar

353
00:15:59,720 --> 00:16:03,420
komunement użati tlieta standard C
libraries-- l-input / output librerija,

354
00:16:03,420 --> 00:16:05,540
l-librerija spag,
u l-librerija matematika.

355
00:16:05,540 --> 00:16:07,610
>> Dan fi żmien l-ewwel tiegħek
problema koppja settijiet,

356
00:16:07,610 --> 00:16:10,940
dawn se jkunu t-tliet
li int primarjament tuża.

357
00:16:10,940 --> 00:16:14,610
Allura kif David diġà
spjegat fil lecture,

358
00:16:14,610 --> 00:16:17,460
lI standard / librerija O, jew il-
input standard / output librerija

359
00:16:17,460 --> 00:16:18,620
ma eżattament dan.

360
00:16:18,620 --> 00:16:23,530
Jippermetti li inti, fil-kodiċi tiegħek, li l-input
xejn mill-utent u output li

361
00:16:23,530 --> 00:16:25,960
għall-iskrin, essenzjalment
istampar lill-iskrin.

362
00:16:25,960 --> 00:16:29,990
>> U hekk kull darba li tuża kwalunkwe funzjoni,
per eżempju l-printf funzjoni () li

363
00:16:29,990 --> 00:16:33,319
aħna qed tmur biex jmorru fuq il-pjastra jmiss,
kun żgur li tinkludi l-istandard I / O

364
00:16:33,319 --> 00:16:36,360
librerija jew inkella int mhux ser
tkun tista 'tuża l-printf () funzjoni.

365
00:16:36,360 --> 00:16:39,110
Għaliex inti, bħala l-programmer
fatt qatt ma kiteb dik il-funzjoni,

366
00:16:39,110 --> 00:16:41,840
int biss tuża xi ħadd
kodiċi ieħor taħt il-kodiċi tiegħek stess.

367
00:16:41,840 --> 00:16:43,620
>> Does li kulħadd jagħmel sens?

368
00:16:43,620 --> 00:16:44,520
Kessaħ.

369
00:16:44,520 --> 00:16:48,530
>> U allura aħna essenzjalment tikseb fuq
il-librerija string.h u l math.h

370
00:16:48,530 --> 00:16:52,970
librerija, .h biss ifisser librerija,
libreriji oħra li inti ser eventwalment

371
00:16:52,970 --> 00:16:55,310
tkun qed tuża fil-kodiċi tiegħek.

372
00:16:55,310 --> 00:16:57,620
>> Madankollu, għal skopijiet
ta 'din il-librerija, aħna wkoll

373
00:16:57,620 --> 00:17:01,170
have-- ta 'dan class-- irridu wkoll
dak li jissejjaħ il-librerija CS50,

374
00:17:01,170 --> 00:17:05,270
cs50.h, fejn aħna, għall
perusal tiegħek ħolqu

375
00:17:05,270 --> 00:17:07,369
bosta funzjonijiet importanti u utli.

376
00:17:07,369 --> 00:17:09,550
Allura li inti bħala programmer
jista piggyback off

377
00:17:09,550 --> 00:17:14,470
dak li aħna stajt diġà bil-miktub sabiex
din il-funzjoni disponibbli lilek

378
00:17:14,470 --> 00:17:15,599
għall-użu tiegħek.

379
00:17:15,599 --> 00:17:18,359
>> I ser tkun tkopri ftit
il-funzjonijiet komunement użati,

380
00:17:18,359 --> 00:17:20,839
imma jafu li dawn huma
kollha online googleable.

381
00:17:20,839 --> 00:17:24,904
Ħossok liberu, pull up-librerija CS50 u
imbagħad inti għandek l-funzjonijiet hemmhekk.

382
00:17:24,904 --> 00:17:25,828
Yeah.

383
00:17:25,828 --> 00:17:28,140
>> SPEAKER 5: Mela jekk inti ma kinux
tuża s-software li

384
00:17:28,140 --> 00:17:29,916
hija pprovduta lilna mill
il-klassi, ma li

385
00:17:29,916 --> 00:17:32,698
jfissirx li għandna d jkollhom biex tniżżel u jsibu
dan header fajl nfusna u għid

386
00:17:32,698 --> 00:17:33,840
il-kompjuter fejn hu?

387
00:17:33,840 --> 00:17:34,320
>> ANDI Peng: mistoqsija Great.

388
00:17:34,320 --> 00:17:34,820
Eżattament.

389
00:17:34,820 --> 00:17:38,194
Allura huwa simili jekk int ma
fiżikament preżenti fi librerija,

390
00:17:38,194 --> 00:17:40,360
hemm ebda mod biex inti
fil-fatt imorru u jkollhom aċċess għaliha.

391
00:17:40,360 --> 00:17:42,589
Allura l-istess ħaġa ma
programmazzjoni C, inti

392
00:17:42,589 --> 00:17:45,880
għandek taċċerta ruħek li qed tuża tagħna
appliance minħabba li l-librerija diġà

393
00:17:45,880 --> 00:17:47,270
ġew inkorporati fih.

394
00:17:47,270 --> 00:17:50,020
U allura meta inti hashtag
#include, tal-librerija hemmhekk.

395
00:17:50,020 --> 00:17:50,520
Yeah.

396
00:17:50,520 --> 00:17:51,920
Tajba kwistjoni.

397
00:17:51,920 --> 00:17:53,461
Kulħadd tajba?

398
00:17:53,461 --> 00:17:53,960
Kessaħ.

399
00:17:53,960 --> 00:17:56,371

400
00:17:56,371 --> 00:17:56,870
Kull dritt.

401
00:17:56,870 --> 00:17:59,330
Allura aħna qed tmur biex hit,
essenzjalment, dak li huwa

402
00:17:59,330 --> 00:18:01,620
l-ewwel funzjoni li
Aħna bħala programmaturi huma

403
00:18:01,620 --> 00:18:03,900
se tkun qed tuża fil-kodiċi tagħna.

404
00:18:03,900 --> 00:18:05,690
Din tissejjaħ l-printf () funzjoni.

405
00:18:05,690 --> 00:18:08,450
Allura, printf () funzjoni, kif stajt
diġà qal fl-aħħar slide,

406
00:18:08,450 --> 00:18:11,830
hija inkluża fl-istandard I / O,
input standard / output, librerija.

407
00:18:11,830 --> 00:18:16,470
>> Sabiex tagħmel żgur li kwalunkwe int using--
oh, let me grab-laser Pointer

408
00:18:16,470 --> 00:18:18,660
kull meta inti qed tuża
l printf () funzjoni,

409
00:18:18,660 --> 00:18:21,790
inti għandek jinkludi l-istandard I / O
librerija jew inkella, meta inti tiġbor,

410
00:18:21,790 --> 00:18:23,760
int ser tikseb żball
minħabba li l-kompjuter se jkun simili,

411
00:18:23,760 --> 00:18:26,140
oh I do not know fejn printf () huwa,
int ma javżak me fejn printf ()

412
00:18:26,140 --> 00:18:26,830
hu.

413
00:18:26,830 --> 00:18:30,150
Well printf () huwa inkluż fil-
I standard / O, hekk meta inti tuża printf (),

414
00:18:30,150 --> 00:18:32,960
kun żgur li jkollhom dik
linja ta 'hawn fuq kodiċi tiegħek.

415
00:18:32,960 --> 00:18:36,040
>> Hekk per eżempju, printf ()
hawnhekk hija funzjoni.

416
00:18:36,040 --> 00:18:40,260
Kull ma huwa print out xi ħaġa
ġewwa l-parentesi għall-utent.

417
00:18:40,260 --> 00:18:44,840
Kieku xi ħadd tixtieq li tieħu stab
lejn dak din il-linja tal-kodiċi dritt

418
00:18:44,840 --> 00:18:46,420
hawn se jistampa?

419
00:18:46,420 --> 00:18:48,730
Għalhekk, ir-risposta li hemm fuq l-iskrin.

420
00:18:48,730 --> 00:18:50,480
Kulħadd?

421
00:18:50,480 --> 00:18:51,380
>> VERDI: Il-qiegħ.

422
00:18:51,380 --> 00:18:53,510
>> ANDI Peng: Verdi, għaliex ma inti tmur
quddiem u jgħidu l-istqarrija kollu?

423
00:18:53,510 --> 00:18:55,718
>> VERDI: Hello, jien jisimni
Andi, u I am 20 sena qodma.

424
00:18:55,718 --> 00:18:57,270
ANDI Peng: Ah, sabiħ.

425
00:18:57,270 --> 00:19:00,240
Allura f'dan il-linja aħna qed tmur biex
jistampa, Hello, jien jisimni Andi,

426
00:19:00,240 --> 00:19:04,280
u I am 20 sena qodma, li
huwa fil-fatt dikjarazzjoni vera.

427
00:19:04,280 --> 00:19:05,090
>> Sintassi.

428
00:19:05,090 --> 00:19:08,830
Allura ftit kwistjonijiet sintattika li
inti guys tixtieq li tagħmel żgur li int taf.

429
00:19:08,830 --> 00:19:09,360
Kwotazzjonijiet.

430
00:19:09,360 --> 00:19:13,170
Kwotazzjonijiet doppja tgħid il-
kompjuter li kollox ġewwa

431
00:19:13,170 --> 00:19:14,850
se jiġu stampati.

432
00:19:14,850 --> 00:19:16,620
>> Kollox ġewwa jista
biss ikunu eżattament kif

433
00:19:16,620 --> 00:19:19,920
inti tip, ħlief għal
komunement fl-aħħar,

434
00:19:19,920 --> 00:19:23,610
aħna qed tmur jridu jinkludu
a hash-- oh sorry-- a n sing.

435
00:19:23,610 --> 00:19:24,640
Allura n sing.

436
00:19:24,640 --> 00:19:28,884
>> Hawn xi ħadd li tixtieq li tieħu raden
lejn dak li ma għall-kodiċi tagħna?

437
00:19:28,884 --> 00:19:29,465
Yeah.

438
00:19:29,465 --> 00:19:30,840
SPEAKER 6: tqiegħdu fuq linja ġdida.

439
00:19:30,840 --> 00:19:31,650
ANDI Peng: Eżattament.

440
00:19:31,650 --> 00:19:34,660
Allura dan kollu ma huwa
jippermettu jiġri x'jiġri

441
00:19:34,660 --> 00:19:37,520
wara dan, wara din id-dikjarazzjoni,
jiġu stampati għal linja ġdida.

442
00:19:37,520 --> 00:19:40,030
B'tali mod li meta int bil-miktub tiegħek
kodiċi inti ma saltwarjament jkollhom affarijiet

443
00:19:40,030 --> 00:19:41,738
tacked fuq l-aħħar
li ma tridu.

444
00:19:41,738 --> 00:19:43,700
Li kollox gets
pulit stampati linja waħda

445
00:19:43,700 --> 00:19:46,870
u mbagħad nibdew fuq il-linja li ġejja.

446
00:19:46,870 --> 00:19:50,970
>> Hawn xi ħadd ftakar dak li
punto virgola ma meta aħna qed kodifikazzjoni?

447
00:19:50,970 --> 00:19:54,580

448
00:19:54,580 --> 00:19:55,330
Yeah.

449
00:19:55,330 --> 00:19:55,740
>> SPEAKER 7: Dikjarazzjoni.

450
00:19:55,740 --> 00:19:56,010
>> ANDI Peng: Jiddispjacini?

451
00:19:56,010 --> 00:19:57,100
>> SPEAKER 7: Ma jispiċċaw id-dikjarazzjoni?

452
00:19:57,100 --> 00:19:57,766
>> ANDI Peng: Yeah.

453
00:19:57,766 --> 00:20:02,670
Għalhekk fl C, jew kwalunkwe ipprogrammar
lingwa, il-virgola

454
00:20:02,670 --> 00:20:04,640
tindika t-tmiem ta 'linja ta' programmazzjoni.

455
00:20:04,640 --> 00:20:09,240
Hekk per eżempju, bl-Ingliż aħna perjodu tuża
ngħid, oh dan huwa l-aħħar sentenza.

456
00:20:09,240 --> 00:20:12,857
Fl-ipprogrammar, l-istess ħaġa, aħna għandna
virgola biex juri l-aħħar ta 'linja.

457
00:20:12,857 --> 00:20:14,690
Oftentimes, meta int
jibdew programm,

458
00:20:14,690 --> 00:20:17,150
inti ser tirrealizza int
ninsewx li żżid punto virgola

459
00:20:17,150 --> 00:20:19,400
u allura inti tipprova tmexxi tiegħek
kodiċi u ma jaħdimx.

460
00:20:19,400 --> 00:20:21,520
U int simili, Ah, I ma
taf għaliex, għandu tkun qed taħdem.

461
00:20:21,520 --> 00:20:24,394
>> Ċansijiet huma inti probabilment nesa a
virgola jew kategorija jew xi ħaġa

462
00:20:24,394 --> 00:20:25,020
x'imkien.

463
00:20:25,020 --> 00:20:27,740
Allura, li l-importanti li wieħed jiftakru.

464
00:20:27,740 --> 00:20:29,627
Kessaħ.

465
00:20:29,627 --> 00:20:31,960
Dritt kollox, turija tal-idejn, kemm
ħafna nies hawn qatt

466
00:20:31,960 --> 00:20:37,210
meħuda AP Computer Science jew
programmati Java qabel, qatt?

467
00:20:37,210 --> 00:20:37,710
KOLLOX SEW.

468
00:20:37,710 --> 00:20:38,210
Sabiħ.

469
00:20:38,210 --> 00:20:41,340
Li mhux se tkun applikabbli
imbagħad, iżda fl Java, inti

470
00:20:41,340 --> 00:20:44,960
ikollhom xi ħaġa imsejħa println
li ma jeżistix fil C.

471
00:20:44,960 --> 00:20:49,927
>> Għalhekk fl C, kull meta inti
trid iżżid fil-varjabbli

472
00:20:49,927 --> 00:20:51,760
fis xi ħaġa li trid
li jistampa, hemm

473
00:20:51,760 --> 00:20:54,620
sintassi speċifiku aħna qed tmur għall-użu.

474
00:20:54,620 --> 00:20:56,520
Li sejjaħ il-
placeholding-- essenzjalment

475
00:20:56,520 --> 00:21:01,180
aħna żid placeholders fis-seħħ
tal-numru sħiħ jew il-varjabbli

476
00:21:01,180 --> 00:21:02,580
li aħna tixtieq li jistampaw.

477
00:21:02,580 --> 00:21:07,430
>> Allura kif inti guys tista 'tara konna inklużi
header librerija ġdida fajl hawn.

478
00:21:07,430 --> 00:21:09,130
Il-librerija CS50.

479
00:21:09,130 --> 00:21:13,160
U li jinsabu f'dak librerija CS50
hija funzjoni komuni aħna ser tkun qed tuża

480
00:21:13,160 --> 00:21:15,610
fil-kors tagħna imsejħa GetInt ().

481
00:21:15,610 --> 00:21:21,830
>> Ħadd ma tixtieq li tieħu stab fil
dak GetInt () jistgħu possibilment tagħmel.

482
00:21:21,830 --> 00:21:22,830
>> UDJENZA: [inaudible]

483
00:21:22,830 --> 00:21:23,550
>> ANDI Peng: Jiddispjacini.

484
00:21:23,550 --> 00:21:24,370
Ma kellekx tisma int.

485
00:21:24,370 --> 00:21:25,511
Maddie, xi ħadd.

486
00:21:25,511 --> 00:21:27,260
Maddie: Oh, hi tinkoraġġixxi
inti għal numru sħiħ.

487
00:21:27,260 --> 00:21:28,051
ANDI Peng: Eżattament.

488
00:21:28,051 --> 00:21:30,670
Allura din il-funzjoni, ieħor
funzjoni li diġà

489
00:21:30,670 --> 00:21:33,690
ġie miktub minn xi ħadd ieħor
li nistgħu jsejjaħ issa.

490
00:21:33,690 --> 00:21:38,000
Kollox huwa huwa fil-pront l-inti, l-utent,
li l-input xi trid bħala l-kodiċi

491
00:21:38,000 --> 00:21:41,850
tkun qiegħda taħdem u huwa jaħżen whatever--
f'dan il-każ aħna qed GetInt () - Ing,

492
00:21:41,850 --> 00:21:44,060
sabiex ifisser aħna qed
kisba integer.

493
00:21:44,060 --> 00:21:46,150
>> U aħna qed tmur biex jaħżnu
li integer ieħor

494
00:21:46,150 --> 00:21:48,900
li konna biss magħmula imsejħa età.

495
00:21:48,900 --> 00:21:51,500
Li jagħmel sens għal kulħadd?

496
00:21:51,500 --> 00:21:52,190
Kessaħ.

497
00:21:52,190 --> 00:21:56,400
>> Allura issa li konna maħżuna dan integer,
li konna wasslet mill-utent,

498
00:21:56,400 --> 00:22:00,010
f'dan varjabbli, konna
maħluqa mill int tip imsejħa età,

499
00:22:00,010 --> 00:22:03,720
nistgħu jimxi 'l quddiem u l-post
li fil printf tagħna () funzjoni.

500
00:22:03,720 --> 00:22:08,970
Allura l-sintassi normalment għal printf () huwa
li kull fejn fil attwali fiżika tiegħek

501
00:22:08,970 --> 00:22:14,410
linja trid tinkludi li numru sħiħ,
inti tagħmel dan is-simbolu hemm dritt,

502
00:22:14,410 --> 00:22:17,800
is-simbolu mija, bil-
tip ta 'varjabbli li tixtieq.

503
00:22:17,800 --> 00:22:20,090
>> Allura f'dan il-età każ huwa integer.

504
00:22:20,090 --> 00:22:25,030
Allura int ser jinkludi
% i għaliex dan huwa integer.

505
00:22:25,030 --> 00:22:26,860
U mbagħad wara tiegħek
dikjarazzjoni, int ser

506
00:22:26,860 --> 00:22:30,370
biex jagħmlu comma u l
isem tal-varjabbli.

507
00:22:30,370 --> 00:22:33,420
>> Allura hawnhekk, aħna qed tmur biex jistampaw
out, Hello, jien jisimni Andi,

508
00:22:33,420 --> 00:22:35,730
u I am snin vojta qodma.

509
00:22:35,730 --> 00:22:38,890
Hashta-- jew, sorry--,
età bi kwalunkwe input I.

510
00:22:38,890 --> 00:22:42,790
Mela jekk jien kellhom input
20 għall GetInt tiegħi () hawn,

511
00:22:42,790 --> 00:22:44,500
ikun jistampa l-istess ħaġa eżatt.

512
00:22:44,500 --> 00:22:47,990
Iżda, jekk jien ridt xi ħaġa input
inkella, bħal forsi 40 jew 45,

513
00:22:47,990 --> 00:22:50,800
allura inti tara li jirrifletti
għaldaqstant fil-kodiċi.

514
00:22:50,800 --> 00:22:52,886
>> Allura dan huwa eżempju
ta 'xi ħaġa li fihom

515
00:22:52,886 --> 00:22:55,260
prints out u jistenna li
inti kif jekk huwa l-istess ħaġa,

516
00:22:55,260 --> 00:22:57,593
iżda taħt il-barnuża ta
il-kompjuter hemm attwalment

517
00:22:57,593 --> 00:22:59,560
affarijiet differenti ħafna jiġri.

518
00:22:59,560 --> 00:23:00,060
Kessaħ.

519
00:23:00,060 --> 00:23:02,760

520
00:23:02,760 --> 00:23:03,260
Kull dritt.

521
00:23:03,260 --> 00:23:06,940
Allura dak jekk irridu varjabbli multipli?

522
00:23:06,940 --> 00:23:08,290
Pretty faċli.

523
00:23:08,290 --> 00:23:09,150
L-istess ħaġa.

524
00:23:09,150 --> 00:23:11,930
Għandna wkoll funzjoni ġdida
hawn imsejjaħ GetString (),

525
00:23:11,930 --> 00:23:15,380
wkoll inklużi fil-librerija CS50,
li kollox ma huwa l-utent fil-pront

526
00:23:15,380 --> 00:23:18,120
għal string, li hija
biss sett ta 'karattri,

527
00:23:18,120 --> 00:23:19,810
hekk bħal sentenza jew bħal isem.

528
00:23:19,810 --> 00:23:25,470
>> Allura f'dan il-każ, rridu naraw żewġ
placeholders% s għall spag u% i

529
00:23:25,470 --> 00:23:26,750
għall-eqreb numru sħiħ.

530
00:23:26,750 --> 00:23:29,190
U aħna qed tmur biex isegwu
li miż-żewġ varjabbli

531
00:23:29,190 --> 00:23:32,670
Irridu inklużi, fl-ordni
li jidhru fis-sentenza.

532
00:23:32,670 --> 00:23:35,471
Hekk per eżempju, jien jisimni
vojt, nixtieq isem hemmhekk,

533
00:23:35,471 --> 00:23:36,970
hekk jien ser ikollhom l-isem ewwel.

534
00:23:36,970 --> 00:23:39,637
U mbagħad wara, nixtieq
età, tixtieq li jkollok tieni età.

535
00:23:39,637 --> 00:23:42,720
U hekk jekk jien ridt li input, Hello,
isem tiegħi Andi, u I am 20 sena qodma.

536
00:23:42,720 --> 00:23:46,370
Jekk I inputted Andi u 20, l-
istess ħaġa eżatt se jistampaw;

537
00:23:46,370 --> 00:23:51,134
madankollu, issa konna ltqajna żewġ maħżuna
varjabbli ta 'isem, kif ukoll int.

538
00:23:51,134 --> 00:23:51,634
Yeah.

539
00:23:51,634 --> 00:23:54,124
>> SPEAKER 8: Ikun
kapaċi li jimxu jekk inti switched

540
00:23:54,124 --> 00:23:55,620
isem u l-età fl-aħħar ta 'dak?

541
00:23:55,620 --> 00:23:55,840
>> ANDI Peng: Yeah.

542
00:23:55,840 --> 00:23:57,006
Li kwistjoni verament tajba.

543
00:23:57,006 --> 00:23:59,520
Allura storja twila fil-qosor, l-ebda.

544
00:23:59,520 --> 00:24:03,070
Minħabba isem u age-- dak
tip ta 'varjabbli huwa l-isem?

545
00:24:03,070 --> 00:24:03,950
>> SPEAKER 8: String.

546
00:24:03,950 --> 00:24:05,440
>> ANDI Peng: U dak
tip ta 'varjabbli huwa l-età?

547
00:24:05,440 --> 00:24:06,231
>> SPEAKER 8: Integer.

548
00:24:06,231 --> 00:24:10,290
ANDI Peng: Allura hawnhekk għandna placeholder
għall spag u numru sħiħ, id-dritt?

549
00:24:10,290 --> 00:24:13,350
Mela jekk ġejt biex jaqilbu dawn,
il-kompjuter mhux se tkun taf.

550
00:24:13,350 --> 00:24:16,250
Huwa ser jiċċekkja għal string,
u jekk inti tipprova tagħtiha int,

551
00:24:16,250 --> 00:24:18,083
li għaddej biex jkun simili
stenna Jien konfuż, inti

552
00:24:18,083 --> 00:24:21,100
told me I għandhom ikunu
allotting memorja għal int.

553
00:24:21,100 --> 00:24:23,760
U d-dritt hawn, meta
huwa jistenna integer

554
00:24:23,760 --> 00:24:25,640
u inti tagħtiha isem
u string minflok,

555
00:24:25,640 --> 00:24:28,931
huwa wkoll se jkunu ħafna konfużjoni, huwa
mhux se jimxu eżattament il-mod inti bżonnha.

556
00:24:28,931 --> 00:24:35,280
Allura hawnhekk, ismijiet u s-sintassi hija
importanti ħafna għat-tmexxija kodiċi.

557
00:24:35,280 --> 00:24:37,991
Kulħadd tajba?

558
00:24:37,991 --> 00:24:38,490
Yeah.

559
00:24:38,490 --> 00:24:39,476
Maddie.

560
00:24:39,476 --> 00:24:44,620
>> Maddie: Hawnhekk, I know stajt ħares we
lejn eżempji fil-klassi, fejn dawn jistaqsu

561
00:24:44,620 --> 00:24:46,950
liema huwa l-età tiegħek, x'inhu l-isem tiegħek.

562
00:24:46,950 --> 00:24:50,250
Hawnhekk, kieku jkun it doesn't--
jekk konna biex imexxu dan il-kodiċi,

563
00:24:50,250 --> 00:24:51,750
ma jkunx titlob għal dan?

564
00:24:51,750 --> 00:24:54,740
Imma inti biss input żewġ numri
u allura tmur bħal dik?

565
00:24:54,740 --> 00:24:55,781
>> ANDI Peng: Yeah, eżattament.

566
00:24:55,781 --> 00:24:58,250
Mela jekk int riedu biex din
wiri, jekk jogħġbok niżżel l-età tiegħek,

567
00:24:58,250 --> 00:25:01,100
inti tista 'sempliċement żid printf () funzjoni
li jgħid, Jekk jogħġbok ikteb l-età tiegħek,

568
00:25:01,100 --> 00:25:01,600
hawn fuq.

569
00:25:01,600 --> 00:25:02,711
Li l-mistoqsija tajba.

570
00:25:02,711 --> 00:25:03,210
Yeah.

571
00:25:03,210 --> 00:25:07,964
>> SPEAKER 9: Allura, ikun diġà
inklużi fil GetInt () [inaudible].

572
00:25:07,964 --> 00:25:09,380
ANDI Peng: Le, attwalment mhuwiex.

573
00:25:09,380 --> 00:25:11,809
Allura dan kollu ma huwa biss
iqajjem skrin vojta

574
00:25:11,809 --> 00:25:13,100
lill-utent għal xi ħaġa input.

575
00:25:13,100 --> 00:25:17,420
Jekk inti tixtieq li, jekk inti tixtieq li jistampaw
xi ħaġa li jirrakkonta l-utent simili,

576
00:25:17,420 --> 00:25:21,110
jekk jogħġbok agħti me età tiegħek, allura inti
jkollhom printf () li yourself.

577
00:25:21,110 --> 00:25:23,789
Għaliex kulħadd juża din
funzjoni għall-affarijiet differenti,

578
00:25:23,789 --> 00:25:26,080
inti tista 'tkun ħażna età,
inti tista 'tkun indirizz ħażna,

579
00:25:26,080 --> 00:25:28,060
inti tista 'tkun ħażna numri tat-telefon.

580
00:25:28,060 --> 00:25:31,190
U dan huwa verament sa
użi individwali guys tiegħek "

581
00:25:31,190 --> 00:25:34,390
għal dak li inti tixtieq li jgħidu.

582
00:25:34,390 --> 00:25:34,890
Yeah.

583
00:25:34,890 --> 00:25:38,236
>> SPEAKER 10: Allura, biss biex tiċċara, fejn
do inti input l-isem u l-età

584
00:25:38,236 --> 00:25:43,020
b'tali mod li juri fil-post ta '% s?

585
00:25:43,020 --> 00:25:44,320
>> ANDI Peng: Bħal fil-utent?

586
00:25:44,320 --> 00:25:47,165
>> SPEAKER 10: Iva, bħal kif nista
jagħmlu it-- fejn ma nressaq Andi,

587
00:25:47,165 --> 00:25:48,350
u fejn ma nressaq 20?

588
00:25:48,350 --> 00:25:48,640
>> ANDI Peng: Yeah.

589
00:25:48,640 --> 00:25:50,250
Mela jekk ġejt biex
tmexxi effettivament dan il-kodiċi,

590
00:25:50,250 --> 00:25:52,875
Jien ma attwalment taħdem l
kodiċi, dan huwa biss hawn dritt issa.

591
00:25:52,875 --> 00:25:56,910
I Jekk kellhom imexxu l-kodiċi, nixtieq
jikkompilaw il-kodiċi, tagħmel il-fajl,

592
00:25:56,910 --> 00:26:00,760
imexxu l-kodiċi, u allura hemm kieku
jkun biss żewġ spazji għalija id-dħul dan.

593
00:26:00,760 --> 00:26:01,260
Yeah.

594
00:26:01,260 --> 00:26:03,843
Inti guys se tara meta inti play
madwar il-kodiċi yourself.

595
00:26:03,843 --> 00:26:05,760

596
00:26:05,760 --> 00:26:09,645
>> Dritt Kollha aħna qed tmur biex jimxu
fit-taqsima li jmiss ta 'dak

597
00:26:09,645 --> 00:26:11,610
aħna ser tkun tkopri llum.

598
00:26:11,610 --> 00:26:13,980
Aħna qed tmur biex jmorru fuq dak
dikjarazzjonijiet kondizzjonali huma.

599
00:26:13,980 --> 00:26:16,500
Mela jekk inti guys tiftakar
u jitlob lura mingħandhom lecture,

600
00:26:16,500 --> 00:26:19,210
dikjarazzjonijiet kondizzjonali,
kollha huma huma sett

601
00:26:19,210 --> 00:26:24,010
tal istruzzjonijiet lill-kompjuter fl
li jekk ċerta kondizzjoni hija vera,

602
00:26:24,010 --> 00:26:27,470
inti teżegwixxi l-kodiċi
ġewwa ta 'din il-kundizzjoni.

603
00:26:27,470 --> 00:26:30,101
>> Għalhekk fl Scratch-- essenzjalment
il big tema mil-lum

604
00:26:30,101 --> 00:26:32,850
hija li inti guys jkollhom diġà l
raw il-loġika wara kollox

605
00:26:32,850 --> 00:26:34,020
li aħna qed jkopru.

606
00:26:34,020 --> 00:26:36,190
U kollha li aħna qed tagħmel huwa
traduzzjoni xi ħaġa

607
00:26:36,190 --> 00:26:39,090
li kien ħafna intuwittivi fid
Scratch, u hard kodifikazzjoni dan

608
00:26:39,090 --> 00:26:41,950
fil-sintassi aħna ser tkun qed tuża
għall-klassi li C.

609
00:26:41,950 --> 00:26:47,550
Għalhekk loġikament, dan kollu blokk kien
huwa li l-biċċa ta 'kodiċi hemm dritt.

610
00:26:47,550 --> 00:26:49,995
Yeah.

611
00:26:49,995 --> 00:26:50,900
KOLLOX SEW.

612
00:26:50,900 --> 00:26:55,290
>> Aħna wkoll jsibu rwieħhom jekk ... inkella
dikjarazzjoni li huwa biss saff miżjud

613
00:26:55,290 --> 00:26:59,120
ta 'kumplessità għall-istqarrija jekk
fejn il-kompjuter jieħu ħarsa lejn din

614
00:26:59,120 --> 00:27:04,260
u jara jekk din il-kundizzjoni huwa veru, do
ikun x'ikun l ġewwa dawn iż-żewġ kategoriji,

615
00:27:04,260 --> 00:27:08,470
else-- tant tip ta bħall-default, jekk
ma tissodisfax il condition-- tagħmel dan.

616
00:27:08,470 --> 00:27:10,120
Huwa simili furketta fit-triq.

617
00:27:10,120 --> 00:27:14,400
Jekk ix-xita barra, nressaq
fuq ġakketta xita, kull ħaġ'oħra

618
00:27:14,400 --> 00:27:16,330
inkella I ma jitqiegħdu fuq ġakketta xita.

619
00:27:16,330 --> 00:27:18,400
>> Does li l-loġika jagħmel sens għal kulħadd?

620
00:27:18,400 --> 00:27:21,031
Kessaħ.

621
00:27:21,031 --> 00:27:21,530
Kull dritt.

622
00:27:21,530 --> 00:27:24,970
Allura bħal eżempju iebes ta '
dan li aħna se tara fil C

623
00:27:24,970 --> 00:27:28,890
hija jekk jien ridt li jinħoloq
imsejħa sigħat huiswerk varjabbli.

624
00:27:28,890 --> 00:27:32,050
U jekk sigħat huiswerk huwa inqas
minn ħamsa, I say Life hija kbira.

625
00:27:32,050 --> 00:27:33,070
Huwa wunderbare.

626
00:27:33,070 --> 00:27:36,450
Madankollu, jgħidu Il-ġlieda hija real--
li huwa dak li aħna kollha dwar din it-Tnejn

627
00:27:36,450 --> 00:27:39,337
wara nofsinhar up Xjenza Hill huma
probabbilment tagħmel id-dritt now--

628
00:27:39,337 --> 00:27:40,170
UDJENZA: [laughing]

629
00:27:40,170 --> 00:27:42,510
ANDI Peng: Huma mod aħna
kieku, nirringrazzjak għal dak.

630
00:27:42,510 --> 00:27:46,180
Il-mod kif aħna hardcode
B'dan C huwa if-- ejja nassumu

631
00:27:46,180 --> 00:27:49,920
aħna diġà għandhom varjabbli tat-tip
int imsejħa sigħat huiswerk dritt hawn.

632
00:27:49,920 --> 00:27:53,870
Jekk is-sigħat huiswerk huwa inqas minn
ħamsa printf (), Life hija kbira.

633
00:27:53,870 --> 00:27:57,330
Ftakar iżommu / n għaliex
inti tixtieq linja ġdida wara.

634
00:27:57,330 --> 00:27:59,660
Print Else, Il-ġlieda huwa reali.

635
00:27:59,660 --> 00:28:03,720
>> Ma kulħadd jifhem kif
I transitioned minn dan il-blokk

636
00:28:03,720 --> 00:28:07,610
fis dan blokk ta 'kodiċi?

637
00:28:07,610 --> 00:28:08,110
Kessaħ.

638
00:28:08,110 --> 00:28:11,030

639
00:28:11,030 --> 00:28:11,840
Kull dritt.

640
00:28:11,840 --> 00:28:15,930
>> Allura issa aħna qed tmur biex tagħti ħarsa lejn
dikjarazzjonijiet multipli Jekk kollox.

641
00:28:15,930 --> 00:28:18,140
Mela ejja nassumu l-
iskop ta 'dan il-programm

642
00:28:18,140 --> 00:28:20,870
kien aħna l-utent għal grad fil-pront.

643
00:28:20,870 --> 00:28:24,450
Aħna Prompt użu GetInt () għal
grad, u dawn input valur,

644
00:28:24,450 --> 00:28:27,700
u inti tixtieq li display
liema tip ta 'grad li ltqajna.

645
00:28:27,700 --> 00:28:30,730
>> Mela jekk jien kellhom ifasslu programm, I
jfissru tipikament fil kollha ta 'l-għajnejn tagħna,

646
00:28:30,730 --> 00:28:35,490
90-100 huwa A, 80-90 hija
B, u oħrajn u l-bqija.

647
00:28:35,490 --> 00:28:39,040
Dak li hu ħażin ma 'dan
biċċa tal-kodiċi li mhuwiex

648
00:28:39,040 --> 00:28:41,393
tagħmel dak li nixtieq li tagħmel.

649
00:28:41,393 --> 00:28:41,892
Yeah.

650
00:28:41,892 --> 00:28:45,100
>> SPEAKER 11: Huma għandhom limiti aktar baxxi,
iżda dawn ma jkollhomx limiti ta 'fuq.

651
00:28:45,100 --> 00:28:46,280
>> ANDI Peng: Eżattament.

652
00:28:46,280 --> 00:28:47,950
Did kulħadd jisma 'dak li qalet?

653
00:28:47,950 --> 00:28:50,200
Hemm għaddej li jkun ta 'fuq
limiti, iżda l-ebda limiti aktar baxxi.

654
00:28:50,200 --> 00:28:52,540
Jiddispjacini, maqlub,
limiti aktar baxxi, l-ogħla limiti.

655
00:28:52,540 --> 00:28:55,090
Allura kieku inti tixtieq li
tieħu stab fil tgħid

656
00:28:55,090 --> 00:28:58,945
dak li jkun stampat fuq dan
screen jekk I kellhom imexxu dan il-kodiċi.

657
00:28:58,945 --> 00:28:59,820
SPEAKER 11: Żball?

658
00:28:59,820 --> 00:29:01,140
ANDI Peng: Żball?

659
00:29:01,140 --> 00:29:02,740
Raden kbira, mhux tajba ħafna.

660
00:29:02,740 --> 00:29:05,465
Ħadd ma jkollu stab ieħor?

661
00:29:05,465 --> 00:29:06,640
Yeah, Aaron.

662
00:29:06,640 --> 00:29:10,099
>> AARON: Jekk inti tpoġġi fil
xi ħaġa akbar minn 90,

663
00:29:10,099 --> 00:29:11,640
ikun juri l-gradi inti ltqajna.

664
00:29:11,640 --> 00:29:13,640
Ikun nuruk ltqajna A,
inti ltqajna B, inti ltqajna C.

665
00:29:13,640 --> 00:29:13,870
>> ANDI Peng: Yeah.

666
00:29:13,870 --> 00:29:14,840
Dan huwa eżattament id-dritt.

667
00:29:14,840 --> 00:29:17,820
Allura, li d tkun isbaħ.

668
00:29:17,820 --> 00:29:21,781
Madankollu, huma reċiprokament
esklussiva, I think.

669
00:29:21,781 --> 00:29:23,280
I Jekk kellhom imexxu din il-biċċa ta 'kodiċi.

670
00:29:23,280 --> 00:29:26,200
U mbagħad ejja biss jgħidu, I
inputted-grad ta '95.

671
00:29:26,200 --> 00:29:30,360
Allura 95 issa hija maħżuna fil
l-int imsejjaħ grad.

672
00:29:30,360 --> 00:29:33,610
>> U għalhekk C hija lingwa
li tmur up fuq għal isfel,

673
00:29:33,610 --> 00:29:36,000
hekk li għaddej biex dejjem
mixja lejn qiegħ.

674
00:29:36,000 --> 00:29:39,420
Allura li għaddej biex jiġu hawn, aqra jekk
grad hija akbar minn jew ugwali għal 90,

675
00:29:39,420 --> 00:29:42,850
printf () inti ltqajna A. Great, I
jkollhom 95, li iktar minn 90.

676
00:29:42,850 --> 00:29:44,866
Huwa ser jistampaw,
I ltqajna A. Huwa ser

677
00:29:44,866 --> 00:29:48,850
li tagħti ħarsa lejn dan jekk, li għaddej
jgħidu, ukoll 95 hija wkoll aktar minn 80,

678
00:29:48,850 --> 00:29:52,970
li għaddej biex jistampaw inti wkoll ltqajna ltqajna
marka B exclamation, u hekk u hekk

679
00:29:52,970 --> 00:29:53,690
raba.

680
00:29:53,690 --> 00:29:55,890
>> Allura kif aħna kollha taraw,
dan huwa bug komuni

681
00:29:55,890 --> 00:30:00,760
li jistgħu jseħħu meta nkunu
miktub kodiċi li toqgħod attent għalihom.

682
00:30:00,760 --> 00:30:05,430
Kulħadd, kwalnkwe kwistjoni dwar
għaliex dan kien qed jiġri?

683
00:30:05,430 --> 00:30:05,930
Great.

684
00:30:05,930 --> 00:30:08,920

685
00:30:08,920 --> 00:30:09,440
KOLLOX SEW.

686
00:30:09,440 --> 00:30:12,110
>> Allura kif nistgħu jiffissaw dan, huwa ovvjament
il-mistoqsija li jmiss loġiku.

687
00:30:12,110 --> 00:30:16,290
Well, aħna għandna dawn beautiful
affarijiet imsejħa jekk inkella jekk inkella

688
00:30:16,290 --> 00:30:18,010
jekk id-dikjarazzjonijiet inkella.

689
00:30:18,010 --> 00:30:22,230
Allura tista 'tara, jekk int riedu
għall-bidla li problema,

690
00:30:22,230 --> 00:30:25,260
inti riedu jagħmlu kull
kundizzjonijiet li jeskludu lil xulxin,

691
00:30:25,260 --> 00:30:26,860
inti iżid ieħor ... jekk id-dikjarazzjoni.

692
00:30:26,860 --> 00:30:30,068
>> U dawn ta 'course-- jaħsbu minnhom bħala
slielem, jew bħall-iskaluni fuq il ladder--

693
00:30:30,068 --> 00:30:34,050
tista 'żżid peress li ħafna minn dawn kif inti
tixtieq għal kemm kondizzjonijiet kif tixtieq.

694
00:30:34,050 --> 00:30:36,790
Allura hawnhekk, jekk I inputted grad li jkun 95.

695
00:30:36,790 --> 00:30:39,479
Jekk grad tkun akbar minn 95,
printf (), I ltqajna A. Gran.

696
00:30:39,479 --> 00:30:42,020
Huwa ser tara inkella ... jekk
u li għaddej biex tkun taf, Oh no,

697
00:30:42,020 --> 00:30:43,750
I diġà wettaq l-ewwel ħaġa oħra.

698
00:30:43,750 --> 00:30:47,020
I know-- jew l-ewwel if-- Naf li
I ma jkollhomx biex tħares lejn xi wieħed minn dawn

699
00:30:47,020 --> 00:30:48,920
minħabba li wieħed minnhom
diġà kien veru.

700
00:30:48,920 --> 00:30:50,410
Allura li għaddej jiddekorri mill top down.

701
00:30:50,410 --> 00:30:53,650
Hekk kif l-ewwel waħda hija vera, allura
li għaddej biex skip fuq l-bqija

702
00:30:53,650 --> 00:30:54,675
mill-IfS ... inkella.

703
00:30:54,675 --> 00:30:55,550
Does li jagħmel sens?

704
00:30:55,550 --> 00:30:57,841
Allura, b'dan il-mod inti għandek
livelli differenti ta 'kontroll

705
00:30:57,841 --> 00:31:01,090
u hekk kif wieħed minnhom huwa falz, il-
bqija huma wkoll, dawn mhux se anki check.

706
00:31:01,090 --> 00:31:03,577

707
00:31:03,577 --> 00:31:04,076
Kessaħ.

708
00:31:04,076 --> 00:31:07,680

709
00:31:07,680 --> 00:31:08,180
Kull dritt.

710
00:31:08,180 --> 00:31:11,180
>> Allura dan huwa eżempju ta 'differenti
tip ta 'dikjarazzjoni kondizzjonali

711
00:31:11,180 --> 00:31:15,250
naraw inqas ta 'spiss, imma
Ser naraw minnhom u jużawhom.

712
00:31:15,250 --> 00:31:18,120
U dawn qed spiss aktar
effiċjenti għal ċerti każijiet.

713
00:31:18,120 --> 00:31:20,020
Allura aħna għandna dak li sejjaħ
dikjarazzjoni swiċċ.

714
00:31:20,020 --> 00:31:25,140
Allura qabel we koperti x'hemm xi ħaġa oħra
dikjarazzjoni, l-jekk ... dikjarazzjoni ieħor.

715
00:31:25,140 --> 00:31:27,790
Hawnhekk, aħna għandna liema huma
imsejħa dikjarazzjonijiet swiċċ.

716
00:31:27,790 --> 00:31:31,100
>> Allura meta nagħmlu nużaw swiċċ
dikjarazzjonijiet hija ċ-ċavetta?

717
00:31:31,100 --> 00:31:34,090
Allura fi stqarrija swiċċ, inti
normalment, tipikament, fil-fatt inti

718
00:31:34,090 --> 00:31:38,010
tista 'biss interi input għall tiegħek
varjabbli li int iċċekkjar.

719
00:31:38,010 --> 00:31:42,390
Mela jekk jien ridt li tikkontrolla biex tara
jekk ċertu number-- per eżempju

720
00:31:42,390 --> 00:31:43,720
grad, jekk sibt 90.

721
00:31:43,720 --> 00:31:48,190
I tixtieq li tara jekk dan huwa A,
B, jew Ċ I jista 'jkollhom każ hawnhekk.

722
00:31:48,190 --> 00:31:50,840
Madankollu, il-każ għandu
li jibqgħu kostanti ieħor.

723
00:31:50,840 --> 00:31:53,170
>> Allura f'dan is-sens, il-
dikjarazzjoni swiċċ jista 'biss

724
00:31:53,170 --> 00:31:55,290
jikkontrolla għal ugwaljanza ta 'żewġ numri.

725
00:31:55,290 --> 00:31:57,242
Ma jiċċekkja għal xi ħaġa oħra.

726
00:31:57,242 --> 00:31:59,950
Allura li xi ħaġa li jkun ferm
bir-reqqa ta meta inti qed tuża din.

727
00:31:59,950 --> 00:32:04,810
Allura hawnhekk, jekk jien ridt li tikkontrolla biex tara
jekk grad tiegħi ta '90 hija ugwali għal 90 jew 80

728
00:32:04,810 --> 00:32:08,500
jew 70 jew 60, u mbagħad print
il-grad korrispondenti,

729
00:32:08,500 --> 00:32:11,420
I d tkun tista 'tikteb li
fi stqarrija swiċċ.

730
00:32:11,420 --> 00:32:15,120
>> Allura li għaddej biex jiġu hawn, check huwa
dan integer daqs dan kostanti?

731
00:32:15,120 --> 00:32:17,030
Jekk le, li għaddej biex skip.

732
00:32:17,030 --> 00:32:19,880
Huwa ugwali għal kostanti
tnejn, u hekk u ibqa 'sejjer hekk,

733
00:32:19,880 --> 00:32:22,390
sakemm inti hit l-default,
jekk ħadd minnhom huma ugwali.

734
00:32:22,390 --> 00:32:24,590
Hekk kif wieħed minnhom
huwa mistenni li jkun ugwali,

735
00:32:24,590 --> 00:32:27,040
li għaddej biex tagħmel dan
linja tal-kodiċi u jinkisru.

736
00:32:27,040 --> 00:32:30,990
Li jfisser li għaddej biex hit li
run, break, u biss totalment skip

737
00:32:30,990 --> 00:32:32,240
għall-qiegħ tal-kodiċi.

738
00:32:32,240 --> 00:32:37,550
Allura f'dan is-sens it-tip ta 'funzjonijiet
bħal jekk inkella jekk inkella jekk id-dikjarazzjoni.

739
00:32:37,550 --> 00:32:40,830
>> Allura hawnhekk konkret
Eżempju għalik guys.

740
00:32:40,830 --> 00:32:46,140
Mela ejja nassumu li xtaqt li
toħloq varjabbli imsejjaħ sena fondat.

741
00:32:46,140 --> 00:32:50,230
U nixtieq li fil-pront lill-utent biex input
is-sena li l-iskola tagħhom ġiet imwaqqfa.

742
00:32:50,230 --> 00:32:53,300
So I tista 'toħloq dikjarazzjoni swiċċ hawn.

743
00:32:53,300 --> 00:32:56,650
U ejja biss jgħidu, I input 1636.

744
00:32:56,650 --> 00:33:01,120
>> Dan il-kodiċi hawn se tara bidla
sena fondat li jkun ugwali għal 1,636.

745
00:33:01,120 --> 00:33:03,940
Li għaddej biex tara każ
1636, oh dawn huma ugwali,

746
00:33:03,940 --> 00:33:06,230
printf () mhux Jekk inti tkun
f'dak iskola up tramuntana?

747
00:33:06,230 --> 00:33:08,770
Għaliex aħna nassumu li ma
mur hawn jekk imorru lil Harvard,

748
00:33:08,770 --> 00:33:10,380
tinkiser u skip sa l-aħħar.

749
00:33:10,380 --> 00:33:14,090
>> I Jekk kellhom input 1701, li
I jassumi lkoll input,

750
00:33:14,090 --> 00:33:17,500
ikun skip dan il-każ, come
isfel għal każ tnejn li 1701,

751
00:33:17,500 --> 00:33:19,660
u tistampa Merħba għall Yale!

752
00:33:19,660 --> 00:33:21,360
Break, skip sa l-aħħar.

753
00:33:21,360 --> 00:33:25,130
Inkella inti probabilment qed tieħu dan il-kors
online li fih case-- biża merħba

754
00:33:25,130 --> 00:33:29,020
li Yale-- li għaddej biex tmur fil-
print default, Hello Internet!

755
00:33:29,020 --> 00:33:29,870
U break.

756
00:33:29,870 --> 00:33:30,466
Yeah.

757
00:33:30,466 --> 00:33:32,090
>> SPEAKER 12: Tista 'tuża inkella
minflok ta 'nuqqas hemmhekk?

758
00:33:32,090 --> 00:33:34,550
>> ANDI Peng: Le, għaliex il-
mod li din il-funzjoni sħiħa

759
00:33:34,550 --> 00:33:39,170
swiċċ hija mibnija, l-sintassi inti
jeħtieġ li tintuża l-każ każ normali.

760
00:33:39,170 --> 00:33:42,400
Huwa bħall-jekk inkella jekk, dan
wieħed huwa każ każ normali. Yeah.

761
00:33:42,400 --> 00:33:45,650
SPEAKER 13: Inti forsi diġà ngħad dan,
imma inti jista 'jkollhom aktar minn żewġ każijiet?

762
00:33:45,650 --> 00:33:48,066
ANDI Peng: Yeah, inti tista '
jkollhom iktar każijiet trid.

763
00:33:48,066 --> 00:33:50,050
Jaħsbu li bħala bħad
infinitament żżid fuq.

764
00:33:50,050 --> 00:33:52,396
>> SPEAKER 14: Jekk inti
qalbu 1701 ma 1,636,

765
00:33:52,396 --> 00:33:54,187
ma verament tagħmel
dritt differenza?

766
00:33:54,187 --> 00:33:55,770
Huwa biss se jiġi verifikat għal dan.

767
00:33:55,770 --> 00:33:56,900
>> ANDI Peng: Li l-
kwistjoni verament tajba.

768
00:33:56,900 --> 00:33:58,880
U aħna ser tmissx
dan aktar tard, iżda biss

769
00:33:58,880 --> 00:34:01,160
jafu li l-bidla
id-dikjarazzjoni hija infinitely-- huwa

770
00:34:01,160 --> 00:34:03,536
aktar effiċjenti milli kieku u
inkella jekk minħabba li topera

771
00:34:03,536 --> 00:34:06,660
jużaw tip differenti ta 'funzjoni li
jippermettilek, li essenzjalment, għal ftit

772
00:34:06,660 --> 00:34:08,790
jaqbżu dritti għall-
każ li għandek bżonn biex tkun fuq.

773
00:34:08,790 --> 00:34:10,547
Yeah.

774
00:34:10,547 --> 00:34:11,255
SPEAKER 14: Kessaħ.

775
00:34:11,255 --> 00:34:11,754
Grazzi.

776
00:34:11,754 --> 00:34:12,526
ANDI Peng: Yeah

777
00:34:12,526 --> 00:34:16,687
>> SPEAKER 14: U inti ma setgħux
do każijiet simili u akbar minn.

778
00:34:16,687 --> 00:34:17,270
ANDI Peng: Le

779
00:34:17,270 --> 00:34:19,860
Allura, dan huwa dak li jillimitaha dwar il
dikjarazzjoni swiċċ huwa li inti għandek

780
00:34:19,860 --> 00:34:21,564
li jkollhom kostanti biss, biss interi.

781
00:34:21,564 --> 00:34:22,064
Yeah.

782
00:34:22,064 --> 00:34:25,179

783
00:34:25,179 --> 00:34:25,820
KOLLOX SEW.

784
00:34:25,820 --> 00:34:28,659
>> Allura din hija xi ħaġa li inti
guys se jiltaqgħu inqas spiss minn,

785
00:34:28,659 --> 00:34:32,280
imma jien biss riedu
jintroduċu fil-każ.

786
00:34:32,280 --> 00:34:36,210
Għandna hawnhekk x'hemm
imsejħa operatur ternarji.

787
00:34:36,210 --> 00:34:39,370
Fejn essenzjalment, huwa biss bħal
jekk id-dikjarazzjoni kkompilata konformi wieħed.

788
00:34:39,370 --> 00:34:42,630
Hawnhekk, I ser imorru fuq il-linja li jmiss, il-
paġna li jmiss, għaliex huwa aktar faċli biex tara.

789
00:34:42,630 --> 00:34:44,860
>> Allura aħna ve kollha raw dan id-dritt?

790
00:34:44,860 --> 00:34:46,110
Dan huwa pjuttost faċli biex isegwu.

791
00:34:46,110 --> 00:34:51,290
Jekk jien ridt li jagħmlu varjabbli imsejjaħ
spag jismu s, jekk ċertu numru ta

792
00:34:51,290 --> 00:34:54,770
I tagħtiha huwa inqas minn 100, I
tixtieq li tassenja baxxa għall-string,

793
00:34:54,770 --> 00:34:57,240
inkella nixtieq li tassenja għolja.

794
00:34:57,240 --> 00:35:01,370
>> Dan hawnhekk qed tagħmel l-istess ħaġa eżatt
dawk it-tmien linji ta 'kodiċi qed jagħmlu.

795
00:35:01,370 --> 00:35:03,600
So here I tixtieq li joħolqu
string varjabbli.

796
00:35:03,600 --> 00:35:08,520
U dan huwa l-kundizzjoni jien
verifika, jekk numru huwa inqas minn 100,

797
00:35:08,520 --> 00:35:12,750
allura inti tassenja l-valur tal baxx,
inkella tassenja l-valur ta 'high.

798
00:35:12,750 --> 00:35:15,802
>> Dawn slides se jkun online, ebda inkwiet
jekk inti guys ma jsibux dan isfel.

799
00:35:15,802 --> 00:35:18,510
Dan huwa biss mod sempliċi, aktar
mod effiċjenti ta 'kitba kodiċi.

800
00:35:18,510 --> 00:35:21,290

801
00:35:21,290 --> 00:35:21,810
KOLLOX SEW.

802
00:35:21,810 --> 00:35:25,190
>> Allura issa aħna qed tmur biex
jidħol liema, għal ħafna nies

803
00:35:25,190 --> 00:35:28,660
huma bħal ħafna, konfużjoni ħafna
ħaġa li wieħed jaħseb dwar fl-ewwel.

804
00:35:28,660 --> 00:35:30,226
Is-sezzjoni loop.

805
00:35:30,226 --> 00:35:32,600
Hekk illum, aħna qed tmur biex jitkellmu
madwar tliet tipi ta 'linji.

806
00:35:32,600 --> 00:35:34,890
Aħna qed tmur biex tibda bil ftit żmien
loop, allura jitkellmu dwar do filwaqt loop,

807
00:35:34,890 --> 00:35:36,740
u mbagħad jitkellmu dwar għal loops.

808
00:35:36,740 --> 00:35:40,010
>> Allura essenzjalment, għall-aktar
studenti viżwali hemmhekk,

809
00:35:40,010 --> 00:35:44,410
għandna, essenzjalment, a grafika
rappreżentazzjoni ta 'dak li loop waqt ma.

810
00:35:44,410 --> 00:35:48,290
Allura fil-programmazzjoni, inti tibda
u jidħlu fil-loop f'ċertu punt.

811
00:35:48,290 --> 00:35:49,470
Inti tiċċekkja kundizzjoni.

812
00:35:49,470 --> 00:35:52,165
U jekk il-kundizzjoni hija vera,
inti teżegwixxi l-kodiċi ġewwa.

813
00:35:52,165 --> 00:35:53,790
U inti terga 'lura madwar u inti tiċċekkja.

814
00:35:53,790 --> 00:35:57,190
Jekk huwa għadu veru inti żżomm taħdem
dan il-kodiċi madwar u madwar fi loop.

815
00:35:57,190 --> 00:36:00,970
>> Madankollu, it-tieni li
il-kundizzjoni isir falza,

816
00:36:00,970 --> 00:36:02,739
int ser tinkiser u tintemm il-linja.

817
00:36:02,739 --> 00:36:05,030
U dan huwa essenzjalment l-
livell sintattiku int ser tuża.

818
00:36:05,030 --> 00:36:08,250
Filwaqt li ċerta kondizzjoni hija
vera tagħmel dan, jekk mhuwiex veru,

819
00:36:08,250 --> 00:36:12,920
int ser skip sa l-aħħar
u jimxu 'l quddiem mal-programm tiegħek.

820
00:36:12,920 --> 00:36:13,690
KOLLOX SEW.

821
00:36:13,690 --> 00:36:17,250
>> Ħadd ma jkollu eżempju
fuq dak li jista 'potenzjalment jiġri

822
00:36:17,250 --> 00:36:19,160
jekk I tipprova tmexxi din il-biċċa tal-kodiċi?

823
00:36:19,160 --> 00:36:22,470
Mill-mod, SAJ-- li l-Scaz, Andi,
Jason-- aħna ser jiffirma emails tagħna,

824
00:36:22,470 --> 00:36:24,830
Imħabba, SAJ.

825
00:36:24,830 --> 00:36:25,573
Li us.

826
00:36:25,573 --> 00:36:26,500
KOLLOX SEW.

827
00:36:26,500 --> 00:36:29,829
>> Kull min ikollu eżempju, jew ikollhom
idea dwar dak li dan ikun istampar?

828
00:36:29,829 --> 00:36:30,870
Tip ta 'kwistjoni trick.

829
00:36:30,870 --> 00:36:34,550

830
00:36:34,550 --> 00:36:39,380
Allura hawnhekk, ftakar il-kundizzjoni
aħna qed verifika għall huwa waqt veru.

831
00:36:39,380 --> 00:36:42,840
Għalhekk, filwaqt li dan huwa minnu, huwa
morna għall-istampa, I love SAJ!

832
00:36:42,840 --> 00:36:48,460
Hemm xi punt li fih aħna'd
tbiddel dan li xejn inkella?

833
00:36:48,460 --> 00:36:49,050
Le, id-dritt?

834
00:36:49,050 --> 00:36:51,470
>> Allura fil hawn, aħna għandna
jiltaqgħu magħhom dak probabbilment

835
00:36:51,470 --> 00:36:54,310
se tkun bugging ħafna
programmi tiegħek, il-loop infinita.

836
00:36:54,310 --> 00:36:56,268
Inti ser issib li jekk inti
run din il-biċċa ta 'kodiċi,

837
00:36:56,268 --> 00:36:58,160
huwa biss se żżomm
istampar, I love SAJ!

838
00:36:58,160 --> 00:37:00,701
Filwaqt li napprezzaw l-appoġġ,
ma rridux kompjuters tiegħek

839
00:37:00,701 --> 00:37:02,910
li jikkraxxja għaliex inti
iżommu istampar I love SAJ!

840
00:37:02,910 --> 00:37:05,320
>> Allura jekk jogħġbok, jekk jogħġbok,
jevitaw il-loop infinita

841
00:37:05,320 --> 00:37:07,320
għaliex dan huwa qatt ser
biex tevalwa falza

842
00:37:07,320 --> 00:37:08,780
u int qatt ser
li jħallu l-linja.

843
00:37:08,780 --> 00:37:10,530
U int ser
jiġu miġbudin għal dejjem.

844
00:37:10,530 --> 00:37:13,000
Kessaħ.

845
00:37:13,000 --> 00:37:13,694
KOLLOX SEW.

846
00:37:13,694 --> 00:37:15,610
It-tieni tip ta 'linja
aħna ser nitkellmu dwar llum

847
00:37:15,610 --> 00:37:17,580
huwa l-do filwaqt loop, tagħmel waqt loop.

848
00:37:17,580 --> 00:37:20,580
U huwa msejjaħ do filwaqt loop
għax għandek do u waqt.

849
00:37:20,580 --> 00:37:24,390
Allura dan huwa pjuttost simili għal waqt
loop, iżda xi ftit differenti.

850
00:37:24,390 --> 00:37:27,620
Hawnhekk, int ser tagħmel
tkun xi tkun l ġewwa ta 'dan

851
00:37:27,620 --> 00:37:29,747
filwaqt ċerta kondizzjoni hija vera.

852
00:37:29,747 --> 00:37:32,580
Mela jekk jien kienu C u l-kompjuter jien
running r din il-biċċa ta 'kodiċi,

853
00:37:32,580 --> 00:37:33,880
I tagħti ħarsa fil-quċċata.

854
00:37:33,880 --> 00:37:36,890
Mmur C, I say tagħmel dan ħaġa.

855
00:37:36,890 --> 00:37:40,550
U mbagħad I kontroll, filwaqt li dan
huwa veru, ikolli jirrepetih.

856
00:37:40,550 --> 00:37:42,750
Iżda filwaqt li dan huwa falz,
imbagħad I timxi 'l quddiem

857
00:37:42,750 --> 00:37:44,700
u jien qatt ma jmurx lura għal dak loop mill-ġdid.

858
00:37:44,700 --> 00:37:48,360
>> Jista 'xi ħadd jieħu stab
fil x'inhi d-differenza

859
00:37:48,360 --> 00:37:52,130
bejn dan loop u l waħda aħna
biss ħares lejn kienet prattikament.

860
00:37:52,130 --> 00:37:52,717
Yeah.

861
00:37:52,717 --> 00:37:55,050
SPEAKER 15: Il-kondizzjoni
wasal wara minflok qabel?

862
00:37:55,050 --> 00:37:55,841
ANDI Peng: Eżattament.

863
00:37:55,841 --> 00:37:57,984
Hekk hi qalet l-kondizzjoni
wasal wara, mhux qabel.

864
00:37:57,984 --> 00:38:00,400
Fl-aħħarnett, id-differenza
bejn dan u l-loop filwaqt

865
00:38:00,400 --> 00:38:03,597
hija li int biss se jagħmlu
ikun x'ikun l ġewwa dan irrispettivament minn

866
00:38:03,597 --> 00:38:06,430
jekk il-kondizzjoni tiegħek jew le
vera, u mbagħad tiċċekkja l-kundizzjoni.

867
00:38:06,430 --> 00:38:08,304
Allura f'dan il-każ, int
always-- b'dan il-mod,

868
00:38:08,304 --> 00:38:11,240
int dejjem jagħmlu ċert
ikun x'ikun l ġewwa runs mill-inqas

869
00:38:11,240 --> 00:38:14,230
darba qabel verifika biex tara
jekk inti tixtieq li jimxu mill-ġdid.

870
00:38:14,230 --> 00:38:18,040
>> U hawn huwa eżempju
tal meta aħna se tużah.

871
00:38:18,040 --> 00:38:22,570
Għalhekk, per eżempju, jekk jien ridt li jkollhom
varjabbli ta 'int tip jismu età,

872
00:38:22,570 --> 00:38:25,640
u nixtieq li fil-pront
l-utent għall-età tagħhom,

873
00:38:25,640 --> 00:38:27,910
Jien ser tagħmel printf ()
Kemm ghandek zmien?

874
00:38:27,910 --> 00:38:30,330
età = GetInt (), li
huwa suġġeriment l-utent.

875
00:38:30,330 --> 00:38:32,140
>> U xi nies se jkunu verament annoying.

876
00:38:32,140 --> 00:38:34,931
U inti ma tridx bugs fil tiegħek
programm ta 'xi ħadd inputjar simili,

877
00:38:34,931 --> 00:38:36,680
oh jien negattiv 4 snin jew ikun x'ikun.

878
00:38:36,680 --> 00:38:39,900
F'liema każ jekk
tagħmel dan, dan jevalwa

879
00:38:39,900 --> 00:38:43,150
li minnu, li jfisser li jien ser
għandhom iżommu tmur lura u tagħmel dan.

880
00:38:43,150 --> 00:38:45,310
Allura dan se żżomm
l-utent 'suġġeriment mill-ġdid

881
00:38:45,310 --> 00:38:47,960
li jtik bħal reali
Numru età u huwa

882
00:38:47,960 --> 00:38:51,930
ser jibqgħu għaddejjin lura u redoing
sakemm huma jagħtuk età reali

883
00:38:51,930 --> 00:38:56,900
akbar minn wieħed, jew le żero.

884
00:38:56,900 --> 00:38:58,020
>> Allura ħjiel, ħjiel.

885
00:38:58,020 --> 00:39:02,263
Dan se jkun ħafna, utli ħafna
għal waħda mill-problemi PSet tiegħek.

886
00:39:02,263 --> 00:39:04,155
Yeah.

887
00:39:04,155 --> 00:39:05,580
>> SPEAKER 16: Whoops, sorry.

888
00:39:05,580 --> 00:39:06,288
>> ANDI Peng: Yep.

889
00:39:06,288 --> 00:39:09,424
>> SPEAKER 16: Hemm, mhux
li jkun asshole, but--

890
00:39:09,424 --> 00:39:10,340
ANDI Peng: Nru inkwiet.

891
00:39:10,340 --> 00:39:11,990
SPEAKER 16: --are hemm
regoli differenti hawn,

892
00:39:11,990 --> 00:39:13,810
jew ma inti biss tinsa
li jpoġġi l-kwotazzjoni?

893
00:39:13,810 --> 00:39:14,250
>> ANDI Peng: Oh Yeah.

894
00:39:14,250 --> 00:39:15,530
Jiddispjacini, li l-totalment ħżiena tiegħi.

895
00:39:15,530 --> 00:39:17,100
Dan kien definittivament
suppost li tkun kwotazzjoni.

896
00:39:17,100 --> 00:39:17,690
Qabda tajba.

897
00:39:17,690 --> 00:39:18,800
Li ma run.

898
00:39:18,800 --> 00:39:22,070

899
00:39:22,070 --> 00:39:22,830
KOLLOX SEW.

900
00:39:22,830 --> 00:39:26,160
>> Allura l-aħħar tip ta 'loop aħna ser nitkellmu
dwar u, finalment, it-tip mill-aktar

901
00:39:26,160 --> 00:39:28,854
kumpless huwa l għall loop.

902
00:39:28,854 --> 00:39:30,770
Tinkwetax jekk inti ma
jafu dak li tfisser.

903
00:39:30,770 --> 00:39:32,061
Huwa pretty konfuża għall-ewwel.

904
00:39:32,061 --> 00:39:33,640
Aħna ser jmorru fuq eżempju.

905
00:39:33,640 --> 00:39:37,040
>> Dak kollu li jiġri fil-loop għall
huwa li inti għandek tliet dikjarazzjonijiet

906
00:39:37,040 --> 00:39:38,380
li int ser jinkludu.

907
00:39:38,380 --> 00:39:42,130
Allura għal ħaġa ċerta, int
ser initialize varjabbli.

908
00:39:42,130 --> 00:39:45,280
Int ser iżżid l-kondizzjoni li
li dan loop se jżomm taħdem.

909
00:39:45,280 --> 00:39:47,790
U mbagħad, fl-aħħar tal-
loop, int ser taġġorna dan.

910
00:39:47,790 --> 00:39:50,248
Inti tista 'taġġorna l-varjabbli
li inti tixtieq li jżommu rekord ta '.

911
00:39:50,248 --> 00:39:52,530
Allura aħna tipikament jużaw
għal-linji ta 'meta aħna

912
00:39:52,530 --> 00:39:55,390
tixtieq li tmexxi linja għal
ċertu ammont ta 'drabi

913
00:39:55,390 --> 00:39:58,900
u aħna diġà jafu, Oh nixtieq
dan loop li jesegwixxi bħal 10 darbiet,

914
00:39:58,900 --> 00:40:03,060
allura inti do-- I ser jmorru fuq
eżempju fuq il-paġna li jmiss.

915
00:40:03,060 --> 00:40:07,830
>> Allura hawnhekk per eżempju, fil Scratch, jekk inti
riedu xi ħaġa li jirrepetu 10 darbiet,

916
00:40:07,830 --> 00:40:10,790
kull ma kellhom jgħidu kien,
irrepeti 10 darbiet I imħabba SAJ!

917
00:40:10,790 --> 00:40:15,260
li hija aktar aċċettabbli
juru ta 'appoġġ għalina

918
00:40:15,260 --> 00:40:17,120
aktar milli l-loop infinita.

919
00:40:17,120 --> 00:40:19,920
Hawnhekk, kif inti
tranżizzjoni għal C u jiktbu

920
00:40:19,920 --> 00:40:26,040
li huwa għall int-- jien ser joħolqu jew
tiddikjara varjabbli ta 'int tip jismu i.

921
00:40:26,040 --> 00:40:30,089
Jien ser initialize
dan għal 0, hekk i = 0;

922
00:40:30,089 --> 00:40:31,630
u dan se jkun kundizzjoni tiegħi.

923
00:40:31,630 --> 00:40:33,860
Hekk i huwa inqas minn 10.

924
00:40:33,860 --> 00:40:36,096
U mbagħad fl-end--
l-aħħar dikjarazzjoni int

925
00:40:36,096 --> 00:40:38,710
ser ikollhom huwa l-aġġornament tal
dak li jiġri għall-varjabbli i

926
00:40:38,710 --> 00:40:40,206
fl-aħħar tal tiegħek għall loop.

927
00:40:40,206 --> 00:40:42,830
Allura huwa tip ta 'konfużjoni, għaliex
partijiet differenti ta 'din il-linja

928
00:40:42,830 --> 00:40:44,871
qed jiġri fil differenti
tipi tal-linja.

929
00:40:44,871 --> 00:40:46,746
Imma jien ser imorru fuq
Eżempju pseudocode ta 'dak

930
00:40:46,746 --> 00:40:50,360
u forsi jispjegaw dan
biss daqsxejn aħjar.

931
00:40:50,360 --> 00:40:51,500
>> So here.

932
00:40:51,500 --> 00:40:52,929
Dik hija l-linja aħna biss raw.

933
00:40:52,929 --> 00:40:55,470
Essenzjalment fl pseudocode, liema
qed jiġri f'dan il-programm,

934
00:40:55,470 --> 00:40:57,940
hija l-ewwel jien ħolqien
i, initializing dan għal 0.

935
00:40:57,940 --> 00:41:00,440
Jien verifika biex tara jekk i huwa
inqas minn 10, f'liema każ

936
00:41:00,440 --> 00:41:02,840
l-ewwel darba huwa
minħabba 0 huwa inqas minn 10.

937
00:41:02,840 --> 00:41:04,727
Għalhekk il-linja se run.

938
00:41:04,727 --> 00:41:06,310
U allura jien ser Stampa din il-linja.

939
00:41:06,310 --> 00:41:11,240
U mbagħad fl-aħħar ta 'din il-linja, id-dritt
hawn, jien ser tagħmel inkrement i, i ++,

940
00:41:11,240 --> 00:41:13,370
dak kollu li tfisser hija
inkrementazzjoni minn waħda.

941
00:41:13,370 --> 00:41:15,460
>> Hekk i issa 1 hu.

942
00:41:15,460 --> 00:41:17,960
Minħabba li darba kien 0, jekk I
inkrement huwa, huwa issa 1.

943
00:41:17,960 --> 00:41:19,610
U allura jien se jmorru lura
għall-bidu tal-linja

944
00:41:19,610 --> 00:41:20,730
u I jivverifika l-kundizzjoni.

945
00:41:20,730 --> 00:41:22,080
Il-kundizzjoni għadu vera?

946
00:41:22,080 --> 00:41:24,030
Iva, 1 għadu inqas minn 10.

947
00:41:24,030 --> 00:41:27,370
Allura li għaddej biex tipprintja din darb'oħra,
mur u mbagħad inkrement i, u jivverifikaw

948
00:41:27,370 --> 00:41:29,180
il-kondizzjoni
kontinwament, kontinwament,

949
00:41:29,180 --> 00:41:33,290
sakemm inti eventwalment tikseb
sal-punt fejn i hija 10.

950
00:41:33,290 --> 00:41:36,300
>> Inti qed tmur biex jistampaw dan 10 darbiet
u mbagħad i se indaqs għall-10.

951
00:41:36,300 --> 00:41:37,800
Int ser jiċċekkja l-kondizzjoni.

952
00:41:37,800 --> 00:41:38,760
Hija 10 inqas minn 10?

953
00:41:38,760 --> 00:41:40,370
Le, dan huwa falz.

954
00:41:40,370 --> 00:41:43,020
Għalhekk, dan loop mhux se
jiddekorri, li għaddej biex jinkiser,

955
00:41:43,020 --> 00:41:45,040
u int ser
tkompli fuq il-kodiċi tiegħek.

956
00:41:45,040 --> 00:41:47,550
>> Allura kif inti guys tista 'tara, dan
hija eżempju verament kbir

957
00:41:47,550 --> 00:41:53,110
ta 'loop inti tista' programm f'dak
runs għal ammont speċifikat ta 'drabi.

958
00:41:53,110 --> 00:41:54,457
Kull wieħed ċar?

959
00:41:54,457 --> 00:41:54,956
Yeah.

960
00:41:54,956 --> 00:41:59,060
>> SPEAKER 17: Kif dwar inkrement
b'mod esponenzjali, huwa kodifikazzjoni differenti?

961
00:41:59,060 --> 00:42:02,060
>> ANDI Peng: Int can-- aħna ser imorru
matul dan fil-slide li jmiss.

962
00:42:02,060 --> 00:42:03,350
Tajba kwistjoni.

963
00:42:03,350 --> 00:42:05,910
Huwa anyone-- qabel nimxi
on-- ħadd fil-livelli kollha konfuż,

964
00:42:05,910 --> 00:42:07,640
għaliex dan huwa kunċett verament iebsa.

965
00:42:07,640 --> 00:42:09,510
Nru inkwiet, jekk OK you're--.

966
00:42:09,510 --> 00:42:10,010
Kessaħ.

967
00:42:10,010 --> 00:42:12,836

968
00:42:12,836 --> 00:42:13,490
>> Kull dritt.

969
00:42:13,490 --> 00:42:14,610
Just slide ġenerali.

970
00:42:14,610 --> 00:42:18,020
Dan loop filwaqt qed tagħmel l-
istess ħaġa eżatt l għal loop kien.

971
00:42:18,020 --> 00:42:19,631
Huwa biss bil-miktub b'mod differenti.

972
00:42:19,631 --> 00:42:22,130
You guys tista jaqraw b'attenzjoni d-pjastri
fil-konvenjenza tiegħek aktar tard.

973
00:42:22,130 --> 00:42:24,880
Iżda biss jafu li hemm multipli
modi ta 'kitba l-istess ħaġa

974
00:42:24,880 --> 00:42:28,300
li jiġri ma 'linji differenti.

975
00:42:28,300 --> 00:42:28,800
KOLLOX SEW.

976
00:42:28,800 --> 00:42:32,380
>> Allura, issa irridu jiksbu fil-kwistjoni ta 'liema
jekk ikollna loop ġewwa ta 'loop.

977
00:42:32,380 --> 00:42:35,810
Aħna jkollna fis reali
Tip Bidu Jittieħed hawn.

978
00:42:35,810 --> 00:42:40,640
Meta inti tixtieq li tagħmel affarijiet multipli
ħinijiet ġewwa ta 'affarijiet oħra

979
00:42:40,640 --> 00:42:44,129
li tagħmel affarijiet minn darba, inti
tixtieq dak li sejjaħ nested għall loop.

980
00:42:44,129 --> 00:42:47,420
Għal dawk tal inti li l-ewwel tara dan u
titħawwad ħafna, kollox aħna qed tagħmel hawn

981
00:42:47,420 --> 00:42:50,580
qed ikollu għall loop fejn
għandna varjabbli ta 'ringiela.

982
00:42:50,580 --> 00:42:54,500
Iżda ġewwa ta 'dan, irridu wkoll ieħor
għal loop ta 'kolonna varjabbli imsejħa.

983
00:42:54,500 --> 00:42:58,560
U I ħafna jissuġġerixxu lilkom kollha
li huma konfużi li l-ewwel iżommu

984
00:42:58,560 --> 00:43:00,310
track-- tiġbed out, jiġbed dan out.

985
00:43:00,310 --> 00:43:03,000
Tippruvax biss raġuni
permezz tagħha, tiġbed out.

986
00:43:03,000 --> 00:43:06,630
>> Fir-ras, fuq din il-biċċa ta '
karta, jew kwalunkwe, write ringiela,

987
00:43:06,630 --> 00:43:08,614
iżommu rekord ta 'dak ringiela hija ugwali għal.

988
00:43:08,614 --> 00:43:10,780
Ikteb kolonna, iżommu kont
ta 'dak kolonna hija ugwali għal.

989
00:43:10,780 --> 00:43:13,490
U jżommu rekord ta 'dak li hu
stampar ta 'kull iterazzjoni ma.

990
00:43:13,490 --> 00:43:16,320
Kull iterazzjoni ta 'dan loop, kull
iterazzjoni ta 'dan loop akbar,

991
00:43:16,320 --> 00:43:17,820
biss iżommu wara l-loġika.

992
00:43:17,820 --> 00:43:20,190
And I garanzija li inti,
inti ser imħabba dak li tara,

993
00:43:20,190 --> 00:43:24,307
għaliex dan huwa wkoll ferm
applikabbli għal settijiet problema tiegħek.

994
00:43:24,307 --> 00:43:24,806
Kessaħ.

995
00:43:24,806 --> 00:43:27,501

996
00:43:27,501 --> 00:43:28,000
Kull dritt.

997
00:43:28,000 --> 00:43:30,723
Allura l-iktar ħaġa importanti
li inti guys huma probabbilment kollha

998
00:43:30,723 --> 00:43:32,400
ħsieb dwar id-dritt issa,
huma Problema Set tiegħek 1s,

999
00:43:32,400 --> 00:43:33,650
li huma dovuti Ħamis / il-ġimgħa.

1000
00:43:33,650 --> 00:43:36,890

1001
00:43:36,890 --> 00:43:39,710
>> Fil-programm water.c tiegħek,
ħjiel int ser ikollhom

1002
00:43:39,710 --> 00:43:41,590
biex tkun inkoraġġuta l-utent għal input.

1003
00:43:41,590 --> 00:43:43,640
Fi ħdan il-programm mario.c tiegħek
int ser ikollhom

1004
00:43:43,640 --> 00:43:46,431
li jużaw nested għall loop, li huwa
a għall loop ġewwa ta 'għall loop,

1005
00:43:46,431 --> 00:43:50,247
għal stampar ta 'blokk ta' piramida, essenzjalment
bħal dak Mario għandu tiżdied permezz.

1006
00:43:50,247 --> 00:43:53,330
U mbagħad ġewwa greedy-- jew forsi tiegħek
Nagħmlu Bidla, jekk kwalunkwe inti guys

1007
00:43:53,330 --> 00:43:55,740
qatt semgħu that--
int se jkollhom jiġu ħafna

1008
00:43:55,740 --> 00:43:58,160
bir-reqqa ta 'l-ewwel valuri tal-punti f'wiċċ l-ilma.

1009
00:43:58,160 --> 00:44:01,860
Ftakar deċimali f'wiċċ l-ilma u
interi mhumiex l-istess ħaġa.

1010
00:44:01,860 --> 00:44:03,620
Żomm kont ta 'liema waħda hija li.

1011
00:44:03,620 --> 00:44:05,953
U int ser tuża
dikjarazzjonijiet kondizzjonali, kif ukoll.

1012
00:44:05,953 --> 00:44:09,070

1013
00:44:09,070 --> 00:44:10,940
>> Kull dritt, l-aħħar ħaġa.

1014
00:44:10,940 --> 00:44:12,770
Stajt ltqajna minuti koppja xellug.

1015
00:44:12,770 --> 00:44:13,460
Style.

1016
00:44:13,460 --> 00:44:19,320
Allura din hija xi ħaġa li ma
fil-fatt effett l-effiċjenza,

1017
00:44:19,320 --> 00:44:21,010
jew it-tmexxija attwali tal-kodiċi tiegħek.

1018
00:44:21,010 --> 00:44:24,380
Madankollu, l-effetti lilna bħala
graders tiegħek, kif qarrejja tiegħek.

1019
00:44:24,380 --> 00:44:27,290
Hija effetti lilek innifsek, jekk int
jippruvaw isibu problema.

1020
00:44:27,290 --> 00:44:30,700
Hija effetti l-leġġibbiltà tal-kodiċi tiegħek.

1021
00:44:30,700 --> 00:44:34,070
>> Allura stil, bħal meta inti qed tipprova
stil esej għall-Ingliż, jekk inti

1022
00:44:34,070 --> 00:44:36,070
ma kellux il-paragrafi,
inti għandek kollox xorta

1023
00:44:36,070 --> 00:44:39,190
tal jumbled flimkien fuq linja waħda, huwa
jagħmilha verament diffiċli għal xi ħadd

1024
00:44:39,190 --> 00:44:42,620
li jaqra essay tiegħek, anke jekk
punti tiegħek huma loġikament ħoss.

1025
00:44:42,620 --> 00:44:44,390
L-istess ħaġa fil-programmazzjoni.

1026
00:44:44,390 --> 00:44:47,910
Inti jista 'jkollhom horribly joskuraw
kodiċi li Scaz se jkopri,

1027
00:44:47,910 --> 00:44:49,660
u xorta tista 'taħdem u l-funzjoni.

1028
00:44:49,660 --> 00:44:53,110
Iżda għalina, bħala TAs sabiħ tiegħek, li se
tkun qari u l-evalwazzjoni PSets tiegħek,

1029
00:44:53,110 --> 00:44:54,460
li mhux sbieħ ħafna.

1030
00:44:54,460 --> 00:44:56,859
>> Allura jekk jogħġbok, għall-fini
minna u lilek innifsek,

1031
00:44:56,859 --> 00:44:58,900
meta inti qed jippruvaw jiffissaw
problema fil-kodiċi tiegħek,

1032
00:44:58,900 --> 00:45:00,774
u int tipprova
aqra kodiċi tiegħek stess, tagħmel

1033
00:45:00,774 --> 00:45:03,910
żgur inti ssegwi xi konvenzjonijiet
li aħna qed tmur biex jmorru fuq.

1034
00:45:03,910 --> 00:45:04,510
>> Allura l-ewwel.

1035
00:45:04,510 --> 00:45:07,070
Agħti varjabbli tiegħek ismijiet sinifikanti.

1036
00:45:07,070 --> 00:45:11,450
Jekk inti tixtieq li taħżen numru sħiħ
imsejħa età, jekk jogħġbok isem li bih età.

1037
00:45:11,450 --> 00:45:12,875
Ma isem li bih għoli.

1038
00:45:12,875 --> 00:45:14,750
Meta inti qed tipprova
jaħżen età fl-għoli,

1039
00:45:14,750 --> 00:45:16,722
jagħmel kollox
ħafna konfużjoni għalina.

1040
00:45:16,722 --> 00:45:17,930
Aħna ma simili li jiġu konfużi.

1041
00:45:17,930 --> 00:45:19,180
Inti ma simili li jiġu konfużi.

1042
00:45:19,180 --> 00:45:20,350
Ħadd ma jħobb jiġu konfużi.

1043
00:45:20,350 --> 00:45:23,100
Jekk int ser tinħoloq xi ħaġa,
isem li bih xi ħaġa sinifikanti.

1044
00:45:23,100 --> 00:45:26,440
>> Madankollu, fl għal loop, wieħed
varjabbli karattru huma normalment multa.

1045
00:45:26,440 --> 00:45:31,350
U fl għal loop, jekk inti tixtieq biss i,
u j, k, tħossok liberu li biss tagħmel dan.

1046
00:45:31,350 --> 00:45:32,670
>> Inizjalizzazzjoni konsistenti.

1047
00:45:32,670 --> 00:45:33,770
Allura dak li jfisser?

1048
00:45:33,770 --> 00:45:37,600
Dan ifisser teknikament, teoretikament,
inti tista 'tibda u joħolqu

1049
00:45:37,600 --> 00:45:40,140
varjabbli multipli fuq l-istess linja.

1050
00:45:40,140 --> 00:45:42,820
Hekk per eżempju, I tista 'toħloq
integer imsejħa scaz_age,

1051
00:45:42,820 --> 00:45:47,110
u numru sħiħ imsejħa andi_age = 20,
u integer imsejħa jason_age

1052
00:45:47,110 --> 00:45:48,090
fuq l-istess linja.

1053
00:45:48,090 --> 00:45:52,060
U nista 'wkoll jassenja biss wieħed mill
minnhom u mhux l-oħrajn għall-valuri.

1054
00:45:52,060 --> 00:45:54,142
Aħna nitolbukom jekk jogħġbok ma tagħmel dan.

1055
00:45:54,142 --> 00:45:57,350
Għaliex hawnhekk inti ħadthom essenzjalment maħluqa
tliet fatturi varjabbli, iżda biss waħda minnhom

1056
00:45:57,350 --> 00:45:58,295
fil-fatt għandu valur.

1057
00:45:58,295 --> 00:46:00,170
U allura meta nkunu
tipprova taqra kodiċi tiegħek,

1058
00:46:00,170 --> 00:46:01,850
jew jekk inti qed jippruvaw jiffissaw
problema fil-kodiċi tiegħek,

1059
00:46:01,850 --> 00:46:03,340
huwa ħafna konfużjoni li jsegwu.

1060
00:46:03,340 --> 00:46:09,300
Hekk biss minħabba li jistgħu jinqraw tiegħek, għall
leġibbiltà tagħna, ma tagħmel dan.

1061
00:46:09,300 --> 00:46:10,355
>> Ċingi kaboċċi konsistenti.

1062
00:46:10,355 --> 00:46:12,980
Xi nies jixtiequ li jpoġġu tagħhom
ċingi kaboċċi f'postijiet differenti.

1063
00:46:12,980 --> 00:46:14,100
Hija ma verament kwistjoni.

1064
00:46:14,100 --> 00:46:17,900
Just tagħmel żgur li int konsistenti fil tiegħek
kodiċi proprja dwar fejn inti tixtieq li jpoġġuhom.

1065
00:46:17,900 --> 00:46:18,950
>> Ispazjar konsistenti.

1066
00:46:18,950 --> 00:46:22,040
Jekk inti tpoġġi spazju wara
għall loop, dejjem tagħmel dan.

1067
00:46:22,040 --> 00:46:24,930
Ma biss bħal tip ta 'tagħmel dan fid-
F'xi postijiet, ma tagħmel dan f'oħrajn.

1068
00:46:24,930 --> 00:46:26,580
Just ikunu konsistenti.

1069
00:46:26,580 --> 00:46:29,500
>> It-tieni nett, jekk xi ħadd jixtieq
jaqraw b'attenzjoni d-Style Gwida CS50,

1070
00:46:29,500 --> 00:46:33,230
aħna uffiċjalment jkollhom Gwida tal-Istil li
jgħidlek kollha ta 'dawn il-konvenzjonijiet,

1071
00:46:33,230 --> 00:46:34,890
flimkien ma 'aktar.

1072
00:46:34,890 --> 00:46:35,530
Huwa online.

1073
00:46:35,530 --> 00:46:38,670
Huwa simili cs50.net/style
jew xi ħaġa bħal dik.

1074
00:46:38,670 --> 00:46:40,180
Tista google dan.

1075
00:46:40,180 --> 00:46:41,399
>> Konsistenza hija essenzjali.

1076
00:46:41,399 --> 00:46:43,190
Allura tinkwetax dak
nies oħra qed jagħmlu,

1077
00:46:43,190 --> 00:46:46,180
biss tagħmel żgur li int
konsistenti fil-kodiċi tiegħek stess.

1078
00:46:46,180 --> 00:46:50,570
Kull min ikollu xi mistoqsijiet dwar dak?

1079
00:46:50,570 --> 00:46:51,070
Yeah.

1080
00:46:51,070 --> 00:46:53,370
>> SPEAKER 18: Allura l-ħaġa xierqa
li tagħmel ma 'inizjalizzazzjoni huwa biss

1081
00:46:53,370 --> 00:46:56,130
jkollhom magħhom kollha f'post separat
line, hija li dak li qed tgħid?

1082
00:46:56,130 --> 00:46:58,850
>> ANDI Peng: So I rarament kienu dan iseħħ.

1083
00:46:58,850 --> 00:47:02,230
Imma jekk int riedu, jekk int riedu
li jkun simili iffrankar l-ispazju fil-kodiċi tiegħek,

1084
00:47:02,230 --> 00:47:04,000
jew kwalunkwe, inti tista 'tagħmel dan.

1085
00:47:04,000 --> 00:47:07,800
Aħna nitolbu li inti biss ma initialize
ħaġa waħda u mhux l-oħrajn.

1086
00:47:07,800 --> 00:47:12,600
Mela jekk inti tixtieq li tagħmel scaz_age int, int
andi_age, jason_age int, li l-multa.

1087
00:47:12,600 --> 00:47:15,600
Biss ma initialize wieħed
u mhux l-oħrajn hija kollha.

1088
00:47:15,600 --> 00:47:18,380

1089
00:47:18,380 --> 00:47:19,904
>> Mistoqsijiet?

1090
00:47:19,904 --> 00:47:20,850
Kull dritt.

1091
00:47:20,850 --> 00:47:24,610
Jien ser jgħaddu off l-
mikrofonu, u l-pointer laser,

1092
00:47:24,610 --> 00:47:28,862
u l-Baton biex Scaz f'dan il-punt.

1093
00:47:28,862 --> 00:47:29,808
Dan huwa skomdi.

1094
00:47:29,808 --> 00:47:32,650

1095
00:47:32,650 --> 00:47:33,200
Hawn hi.

1096
00:47:33,200 --> 00:47:34,408
>> BRIAN SCASSELLATI: Grazzi.

1097
00:47:34,408 --> 00:47:42,500

1098
00:47:42,500 --> 00:47:43,380
Kif jgħid li għall-ħoss?

1099
00:47:43,380 --> 00:47:46,420

1100
00:47:46,420 --> 00:47:47,900
Sound hija tajba? .

1101
00:47:47,900 --> 00:47:49,220
Eċċellenti.

1102
00:47:49,220 --> 00:47:50,350
KOLLOX SEW.

1103
00:47:50,350 --> 00:47:52,110
Allura, hi kulħadd.

1104
00:47:52,110 --> 00:47:56,540
>> Jien ser tipprova taħdem permezz
eżempju prattiku miegħek.

1105
00:47:56,540 --> 00:48:00,850
U aħna qed tmur għall-użu ta CS50
ambjent għall-iżvilupp, dak li sejjaħ

1106
00:48:00,850 --> 00:48:03,120
l-Ambjent għall-Iżvilupp Integrat.

1107
00:48:03,120 --> 00:48:05,145
U inti stajt tidher dan
murija fl lecture.

1108
00:48:05,145 --> 00:48:07,520
U fil Problem Set 1, int
se jkollhom l-opportunità

1109
00:48:07,520 --> 00:48:10,890
jużawh, u play madwar
dan, u jidraw lilha,

1110
00:48:10,890 --> 00:48:13,640
għaliex aħna qed tmur biex tużah
permezz tal-bqija tas-semestru.

1111
00:48:13,640 --> 00:48:20,350
>> Allura f'dan il-IDE, għandek dak li jistenna
bħal fajl browser tradizzjonali ħafna

1112
00:48:20,350 --> 00:48:21,890
fuq fuq naħa waħda.

1113
00:48:21,890 --> 00:48:24,360
You ħadthom ltqajna porzjon up
top fejn inti qed tmur

1114
00:48:24,360 --> 00:48:28,850
biex tara source code tiegħek, tiegħek
Cfile, il-kodiċi li tikteb.

1115
00:48:28,850 --> 00:48:31,880
U 'l isfel qiegħ, inti ser
tieqa terminal

1116
00:48:31,880 --> 00:48:36,330
li inti ser tkun qed tuża biex
kemm jikkompilaw program tiegħek

1117
00:48:36,330 --> 00:48:39,090
u biex imexxu jew iwettaq program tiegħek.

1118
00:48:39,090 --> 00:48:40,100
KOLLOX SEW.

1119
00:48:40,100 --> 00:48:46,560
>> Allura biss biex tagħtina xi ftit ta '
fondazzjoni, f'dak tieqa terminal,

1120
00:48:46,560 --> 00:48:48,930
int ser tkun
użu ta 'sett ta' kmandi

1121
00:48:48,930 --> 00:48:53,040
li huma jikkmanda standard madwar
ħafna mill-sistemi Unix jew Linux.

1122
00:48:53,040 --> 00:48:55,890
U hekk jekk inti stajt qatt jintużaw
kwalunkwe forma ta 'Unix, Ubuntu,

1123
00:48:55,890 --> 00:48:59,140
jew kwalunkwe mill-togħmiet oħra,
dawn ser tħares familjari.

1124
00:48:59,140 --> 00:49:00,890
>> Jekk int ma, tinkwetax.

1125
00:49:00,890 --> 00:49:02,830
M'hemm xejn kkumplikata dwarhom.

1126
00:49:02,830 --> 00:49:05,330
Huma qed biss bl-użu ta 'differenti
sintassi, a tismija differenti

1127
00:49:05,330 --> 00:49:07,630
konvenzjoni milli inti stajt tidher qabel.

1128
00:49:07,630 --> 00:49:12,190
>> Allura li lista l-fajls
fi direttorju partikolari,

1129
00:49:12,190 --> 00:49:15,310
dawn qed tmur għall-użu ta '
kmand imsejħa ls, jew lista.

1130
00:49:15,310 --> 00:49:18,010
Jekk inti tixtieq li tara kollox
bid-dettalji kollha,

1131
00:49:18,010 --> 00:49:21,535
inti ser tuża kmand
argument f'konformità ma 'ls -l.

1132
00:49:21,535 --> 00:49:23,910
U li ser jurik kollox
f'aktar dettall, inklużi

1133
00:49:23,910 --> 00:49:26,270
l-permessi għal fajl.

1134
00:49:26,270 --> 00:49:31,190
>> Biex jinbidlu direttorju,
inti ser tuża l-kmand cd.

1135
00:49:31,190 --> 00:49:35,180
U tkun taf tkun kapaċi li jibdlu direttorju
kemm biex tmur direttorju dar tiegħek.

1136
00:49:35,180 --> 00:49:38,500
Li jinsab biss cd kollha minnu
innifsu, cd b'żewġ

1137
00:49:38,500 --> 00:49:42,930
tikek se terġa 'lura lilek up wieħed
livell biex direttorju preċedenti tiegħek.

1138
00:49:42,930 --> 00:49:46,400
U inti tista 'ukoll cd għal
subdirectory billi tittajpja cd

1139
00:49:46,400 --> 00:49:48,500
u l-isem ta 'dik il subdirectory.

1140
00:49:48,500 --> 00:49:50,540
>> Tista 'wkoll toħloq direttorji ġodda.

1141
00:49:50,540 --> 00:49:52,790
U aħna qed tmur biex jimxu
permezz ta 'dan fi ftit minuti.

1142
00:49:52,790 --> 00:49:54,498
Iżda biss biex ipoġġihom
kollox fuq l-iskrin.

1143
00:49:54,498 --> 00:49:56,310
Allura inti tista 'tara minnhom.

1144
00:49:56,310 --> 00:50:00,420
>> Int ser ikollok ukoll il-ħila
li jimmanipulaw fajls li jolqtu direttament

1145
00:50:00,420 --> 00:50:02,100
mill-linja ta 'kmand.

1146
00:50:02,100 --> 00:50:06,059
Int ser tkun tista 'kopja minnhom, li
mċaqalqa, jew li jitneħħew,

1147
00:50:06,059 --> 00:50:07,600
jiġifieri, effettivament, li dawn ikunu mħassra.

1148
00:50:07,600 --> 00:50:10,310

1149
00:50:10,310 --> 00:50:15,350
>> L-IDE CS50 jagħtik l-sħiħ
qawwa ta 'argumenti kmand linja.

1150
00:50:15,350 --> 00:50:20,280
U dan ifisser li inti tista 'ukoll
tagħmel affarijiet perikolużi ħafna.

1151
00:50:20,280 --> 00:50:21,560
KOLLOX SEW.

1152
00:50:21,560 --> 00:50:25,010
Per eżempju, inti tista '
tneħħi, jew li hija tħassar,

1153
00:50:25,010 --> 00:50:28,750
fajl mingħajr ma titlob
għal konferma.

1154
00:50:28,750 --> 00:50:31,820
U inti tista 'saħansitra tneħħi
recursively-- li l-

1155
00:50:31,820 --> 00:50:38,940
il-sing r flag-- l kollu
subdirectory u kollha ta 'kontenut tiegħu.

1156
00:50:38,940 --> 00:50:39,660
KOLLOX SEW.

1157
00:50:39,660 --> 00:50:42,940
Huma qed elenkata fl-aħmar għax inti
għandu jaħsibha "Periklu" kull darba

1158
00:50:42,940 --> 00:50:45,000
tara dawk l-affarijiet.

1159
00:50:45,000 --> 00:50:45,920
KOLLOX SEW.

1160
00:50:45,920 --> 00:50:46,420
Kull dritt.

1161
00:50:46,420 --> 00:50:50,090

1162
00:50:50,090 --> 00:50:53,430
>> Issa finalment, l-affarijiet li huma
se tkun verament importanti għalik,

1163
00:50:53,430 --> 00:50:57,270
huma hemm tricks ftit tajba
li tkun taf kif int tan-navigazzjoni

1164
00:50:57,270 --> 00:50:59,190
permezz ta 'dan tieqa terminal.

1165
00:50:59,190 --> 00:51:03,590
L-ewwel, inti tista 'b'mod ċar l-iskrin fil
kwalunkwe ħin mill ittajpjar biss b'tipa ċara.

1166
00:51:03,590 --> 00:51:06,310
U int ser tara
me tagħmel dan spiss.

1167
00:51:06,310 --> 00:51:09,990
Tista 'wkoll biss display
it-test ta 'fajl

1168
00:51:09,990 --> 00:51:13,992
billi jittajpja aktar u allura l-isem ta 'fajl.

1169
00:51:13,992 --> 00:51:17,200
Int ser ikollok mbagħad tkun kapaċi li tiskrollja lura u
raba ma 'dak biss mal-spacebar

1170
00:51:17,200 --> 00:51:19,010
u vleġġa keys.

1171
00:51:19,010 --> 00:51:25,450
>> Jekk għandek, kif għamilna llum fil lecture,
programm li tkun għaddejja kontinwament

1172
00:51:25,450 --> 00:51:29,190
fil loop infinita, inti
tista 'twaqqaf dak il-programm

1173
00:51:29,190 --> 00:51:35,160
minn eżekuzzjoni billi jittajpja fil-kontroll,
li huwa azjenda fl Control-C.

1174
00:51:35,160 --> 00:51:38,360
U inti jista 'jkollhom jagħmlu
dan darba.

1175
00:51:38,360 --> 00:51:40,620
Il-kompjuter gets bogħod minnkom.

1176
00:51:40,620 --> 00:51:43,380
U inti xi kultant bżonn
tagħtiha ftit jipprova

1177
00:51:43,380 --> 00:51:46,280
qabel ma jkun fil-fatt se jsir permezz.

1178
00:51:46,280 --> 00:51:48,760
>> Int ser tkun tista 'wkoll
sort permezz tal-kmandi

1179
00:51:48,760 --> 00:51:54,230
li inti biss ittajpjat bl-użu up ewlenin,
vleġġa ewlenin, u allura l-vleġġa ewlenin isfel.

1180
00:51:54,230 --> 00:51:57,560
U x'hemm aktar utli hija minflok
ta 'tajping out ismijiet fajl twil,

1181
00:51:57,560 --> 00:52:02,209
inti ser tkun tista 'lużu Tab biex
AutoComplete struzzjonijiet ftit.

1182
00:52:02,209 --> 00:52:04,750
Issa aħna qed tmur biex juru
kollha ta 'dawk fi ftit tieni.

1183
00:52:04,750 --> 00:52:06,780
Mela jekk inti ma tiftakarx
minnhom, tinkwetax.

1184
00:52:06,780 --> 00:52:10,780
Dawn huma affarijiet li inti ser
pick up u użu kif aħna jmorru flimkien.

1185
00:52:10,780 --> 00:52:11,470
KOLLOX SEW.

1186
00:52:11,470 --> 00:52:18,830
>> Għalhekk fl C-- b'differenza Scratch--
C hija lingwa ikkumpilata.

1187
00:52:18,830 --> 00:52:23,210
Dan ifisser li aħna qed tmur biex tieħu sors
file-- dak l--test li tikteb,

1188
00:52:23,210 --> 00:52:26,500
l-kmandi li tikteb, l-
printf () dikjarazzjonijiet, il-linji,

1189
00:52:26,500 --> 00:52:32,580
kollox else-- u aħna qed tmur
biex jieħdu dan il-fajl u jgħadduhom off

1190
00:52:32,580 --> 00:52:34,670
għal programm imsejjaħ il-kompilatur.

1191
00:52:34,670 --> 00:52:39,850
>> L-kompilatur mbagħad tieħu
dak it-test li inti stajt bil-miktub

1192
00:52:39,850 --> 00:52:43,270
u din tissarraf f'azzjoni
l-istruzzjonijiet binarja

1193
00:52:43,270 --> 00:52:46,010
li l-kompjuter tiegħek huwa
attwalment għaddejjin użu.

1194
00:52:46,010 --> 00:52:49,700
Li sejjaħ l-oġġett
jew il-fajl eżekutibbli.

1195
00:52:49,700 --> 00:52:55,320
Jekk inti tħares lejn dan il-fajl, int ser
biex tara d-kodiċi li ħadthom bil-miktub.

1196
00:52:55,320 --> 00:52:59,480
Jekk inti tħares lejn dan il-fajl, int ser
biex tara sekwenza każwali ta 'karattri

1197
00:52:59,480 --> 00:53:01,680
li jagħmel ebda sens tkun xi tkun.

1198
00:53:01,680 --> 00:53:03,250
Dak għax dan huwa l-binarju.

1199
00:53:03,250 --> 00:53:05,560
Mhuwiex maħsub biex inti tkun qari.

1200
00:53:05,560 --> 00:53:08,690
>> Madankollu, kwalunkwe ħin li inti tixtieq li
run xi ħaġa, dak li int ser

1201
00:53:08,690 --> 00:53:13,670
li tkun qed taħdem huwa dan il-fajl oġġett.

1202
00:53:13,670 --> 00:53:19,110
Allura meta aħna naħdmu ma 'dawn
fajls, aħna ser jiktbu fajl C.

1203
00:53:19,110 --> 00:53:23,400
Aħna ser imbagħad josservawha, bl-użu
kmand bħal make li se tinvoka

1204
00:53:23,400 --> 00:53:27,070
l clang kompilatur għall-lingwa C.

1205
00:53:27,070 --> 00:53:31,530
U li se tipproduċi oġġett
fajl, bħal, jew f'dan il-każ,

1206
00:53:31,530 --> 00:53:36,580
l-isem, fajl tiegħi, li stajt tpoġġi fil.

1207
00:53:36,580 --> 00:53:37,780
Kull dritt.

1208
00:53:37,780 --> 00:53:39,790
>> Mela ejja fil-fatt jipprovaw dan.

1209
00:53:39,790 --> 00:53:42,850
So I ħarāet bil eżempju
ta 'dak I riedu jippruvaw.

1210
00:53:42,850 --> 00:53:47,380
U waħda mill-affarijiet li
fascinates me huwa animazzjoni.

1211
00:53:47,380 --> 00:53:51,010
Allura aħna qed tmur biex jipprova jagħmel
xi ftit ta 'animazzjoni

1212
00:53:51,010 --> 00:53:53,760
użu biss karattri ASCII.

1213
00:53:53,760 --> 00:53:56,470
Karattri nistgħu jistampa faċilment issa.

1214
00:53:56,470 --> 00:54:00,890
>> Allura hawnhekk huwa tentattiv aħjar tiegħi
li joħolqu għalik

1215
00:54:00,890 --> 00:54:07,005
l-animazzjoni ta 'bunny
taħdem permezz tal-ħaxix twil.

1216
00:54:07,005 --> 00:54:07,505
Hemm hu.

1217
00:54:07,505 --> 00:54:10,150

1218
00:54:10,150 --> 00:54:10,670
KOLLOX SEW.

1219
00:54:10,670 --> 00:54:14,050
Allura huwa ma taħdem s'issa, iżda huwa
permanenti hemmhekk fil-ħaxix twil.

1220
00:54:14,050 --> 00:54:17,810
>> Issa jekk jien kienu animatur,
fil-iskola antika

1221
00:54:17,810 --> 00:54:20,860
verżjoni ta 'animazzjoni, dak I
se tagħmel huwa nixtieq jipproduċi

1222
00:54:20,860 --> 00:54:23,640
stampa ta 'dan bunny il-ħaxix.

1223
00:54:23,640 --> 00:54:25,390
U allura nixtieq jipproduċu
picture-- ieħor

1224
00:54:25,390 --> 00:54:30,600
ieħor dak li jissejjaħ cell-- li
kienu l-fenek biss ftit mċaqalqa.

1225
00:54:30,600 --> 00:54:34,870
U mbagħad terz wieħed li kellu l-
fenek mċaqalqa ftit aktar.

1226
00:54:34,870 --> 00:54:40,610
>> U jien jipproduċi kollu
sekwenza ta 'dawn iċ-ċelluli.

1227
00:54:40,610 --> 00:54:44,220
Xi fejn il fenek huwa fuq
fuq in-naħa tax-xellug.

1228
00:54:44,220 --> 00:54:47,050
U mbagħad timxi bil-mod, wieħed
billi wieħed lejn l-nofs.

1229
00:54:47,050 --> 00:54:51,120
U mbagħad mill-nofs
fuq il-lemin.

1230
00:54:51,120 --> 00:54:55,760
U jekk jien kienu mbagħad, tassew
xxurtjati, I tista 'tpoġġi flimkien

1231
00:54:55,760 --> 00:54:57,970
u I tista tanimhom.

1232
00:54:57,970 --> 00:55:00,370
U hemm bunny tiegħi
taħdem permezz-ħaxix.

1233
00:55:00,370 --> 00:55:02,310
>> C'est PowerPoint kbir tiegħi
trick għall-jum.

1234
00:55:02,310 --> 00:55:02,809
KOLLOX SEW.

1235
00:55:02,809 --> 00:55:04,760
Allura dan huwa tajjeb daqs jiġrilha.

1236
00:55:04,760 --> 00:55:05,260
KOLLOX SEW.

1237
00:55:05,260 --> 00:55:08,455
Allura, hawn waħda aktar ħin, hawnhekk hija tagħna
bunny taħdem permezz-ħaxix.

1238
00:55:08,455 --> 00:55:09,217
>> SPEAKER 19: Għal darb'oħra.

1239
00:55:09,217 --> 00:55:11,050
BRIAN SCASSELLATI: One
aktar ħin, id-dritt.

1240
00:55:11,050 --> 00:55:11,940
Hemm bunny tiegħek.

1241
00:55:11,940 --> 00:55:12,940
KOLLOX SEW.

1242
00:55:12,940 --> 00:55:15,470
>> Hekk illum dak li aħna qed tmur
tagħmel hu aħna qed tmur

1243
00:55:15,470 --> 00:55:21,110
biex tipprova awtomatizzat il-proċess
ta 'dawn iċ-ċelluli li jipproduċu.

1244
00:55:21,110 --> 00:55:24,135
Aħna mhux se pjuttost jasal sal-punt ta '
jkunu jistgħu jpoġġuhom kollha flimkien.

1245
00:55:24,135 --> 00:55:28,900
Iżda, aħna qed tmur biex tipprova awtomatizzat il-
proċess ta 'ġenerazzjoni din is-sekwenza.

1246
00:55:28,900 --> 00:55:32,900
>> U dan huwa ħafna minn dak
animazzjoni illum huwa simili.

1247
00:55:32,900 --> 00:55:36,690
Jiġifieri, inti ma tagħmel affarijiet bilfors
billi tinġibed kollox bl-idejn.

1248
00:55:36,690 --> 00:55:40,610
Aħna nużaw kompjuter biex awtomat
partijiet minn dak il-proċess.

1249
00:55:40,610 --> 00:55:41,110
KOLLOX SEW.

1250
00:55:41,110 --> 00:55:47,720
>> So let me jisswiċċja
issa li IDE CS50 tagħna.

1251
00:55:47,720 --> 00:55:54,260
U jien maħluqa għall us-- u ħalli
me zoom hawn bit-- ftit stajt

1252
00:55:54,260 --> 00:55:58,420
maħluqa għalina punt tat-tluq.

1253
00:55:58,420 --> 00:56:03,830
>> Kull darba li aħna nitolbuk biex ipoġġu
isfel u jiktbu biċċa tal-kodiċi,

1254
00:56:03,830 --> 00:56:09,250
dak li aħna qed verament inti titlob sabiex tagħmel
huwa aħna qed titlob biex isolvu problema.

1255
00:56:09,250 --> 00:56:11,810
U l-mod li għandek
jaħsbu dwar kif isir dan

1256
00:56:11,810 --> 00:56:17,900
huwa billi tibda ma 'xi
parti sempliċi ta 'din is-soluzzjoni.

1257
00:56:17,900 --> 00:56:21,730
U mbagħad jinbnew barra mill dik il-parti.

1258
00:56:21,730 --> 00:56:23,400
U dan huwa dak li aħna qed tmur biex tagħmel illum.

1259
00:56:23,400 --> 00:56:27,570
>> Allura minflok jipprovaw kollha f'daqqa li
jikteb l-għanqud kollu ta 'kodiċi li l-

1260
00:56:27,570 --> 00:56:30,770
ser jipproduċu dawk
10 ċelluli animazzjoni,

1261
00:56:30,770 --> 00:56:35,506
aħna qed tmur biex tibda minflok
ma 'biċċa waħda li xogħlijiet.

1262
00:56:35,506 --> 00:56:37,380
U allura aħna ser nibnu
ftit madwar li

1263
00:56:37,380 --> 00:56:39,740
u ftit aktar u ftit aktar.

1264
00:56:39,740 --> 00:56:42,550
>> Issa l-ħaġa tajba dwar
soluzzjoni ta 'problemi b'dan il-mod

1265
00:56:42,550 --> 00:56:46,716
huwa li se jippermetti li inti tibda
dejjem ma 'xi ħaġa li taf

1266
00:56:46,716 --> 00:56:51,130
xogħlijiet u tintroduċi bidla waħda gradwali.

1267
00:56:51,130 --> 00:56:54,090
U li l-mod tajjeb ħafna
biex jitgħallmu kif kodiċi,

1268
00:56:54,090 --> 00:56:58,590
għax kull darba li inti tagħmel
bidla, tara x'impatt għandha.

1269
00:56:58,590 --> 00:56:59,540
KOLLOX SEW.

1270
00:56:59,540 --> 00:57:01,450
>> Allura hawnhekk punt tat-tluq tagħna.

1271
00:57:01,450 --> 00:57:01,950
KOLLOX SEW.

1272
00:57:01,950 --> 00:57:08,030
Allura fil-bidu tal-fajl tiegħi,
Stajt stdio.h #included hash.

1273
00:57:08,030 --> 00:57:12,560
Li hekk li nista 'nikseb il-
printf () funzjoni biex jaħdmu.

1274
00:57:12,560 --> 00:57:15,240
>> I imbagħad I jkollhom funzjoni prinċipali tiegħi.

1275
00:57:15,240 --> 00:57:18,760
U dan għadu jistenna ftit
arcane jew oskura li xi wħud minnkom.

1276
00:57:18,760 --> 00:57:20,010
Li OK.

1277
00:57:20,010 --> 00:57:23,190
Kull ma jgħid hu li
il-funzjoni ewlenija jieħu

1278
00:57:23,190 --> 00:57:27,830
mezzi ebda arguments-- null
xejn C. U

1279
00:57:27,830 --> 00:57:29,940
prospetti skont il-konvenzjoni integer.

1280
00:57:29,940 --> 00:57:33,290
Main dejjem jirritorna numru sħiħ,
normalment kodiċi qal affarijiet

1281
00:57:33,290 --> 00:57:35,071
marru tajjeb jew li ma marx tajjeb.

1282
00:57:35,071 --> 00:57:35,570
KOLLOX SEW.

1283
00:57:35,570 --> 00:57:39,110
Iżda prinċipali għandu jkollhom dik
forma għalina dritt issa.

1284
00:57:39,110 --> 00:57:42,080
>> Stajt mbagħad titqiegħed fi tliet linji ta 'kodiċi.

1285
00:57:42,080 --> 00:57:46,760
U flimkien ma 'kull linja ta'
kodiċi, stajt jitqiegħdu kumment.

1286
00:57:46,760 --> 00:57:51,340
Issa waħda mill-affarijiet li
aħna se tinsisti li inti tagħmel,

1287
00:57:51,340 --> 00:57:55,320
u huwa tali importanti
prattika programmazzjoni,

1288
00:57:55,320 --> 00:57:57,800
huwa li dejjem jikkummentaw kodiċi tiegħek.

1289
00:57:57,800 --> 00:58:02,550
Dejjem ikteb fi
Xi ħaġa kumment English

1290
00:58:02,550 --> 00:58:06,740
li taħseb li l-
kodiċi suppost tagħmel.

1291
00:58:06,740 --> 00:58:11,360
B'dan il-mod, aktar tard meta inti terga 'lura għal
dan, inti tista 'tħares lejn din u inti tista' tgħid,

1292
00:58:11,360 --> 00:58:13,800
oh, I remember dak I kien
tipprova tagħmel ma 'dan.

1293
00:58:13,800 --> 00:58:17,590
Jew meta TA tiltaqa stabbiliti miegħek biex
jippruvaw jgħinuk fil ħinijiet tal-uffiċċju,

1294
00:58:17,590 --> 00:58:20,890
dawn tista 'tħares lejn dan u jmorru, I
tara dak li kienu qegħdin jippruvaw jagħmlu,

1295
00:58:20,890 --> 00:58:25,630
imma minflok dan huwa
dak li verament jiġri.

1296
00:58:25,630 --> 00:58:26,130
KOLLOX SEW.

1297
00:58:26,130 --> 00:58:30,300
>> So I ħadthom ltqajna tliet partijiet għall-kodiċi tiegħi,
Jien ser ewwel nett print

1298
00:58:30,300 --> 00:58:33,110
xi tikek fil-bidu.

1299
00:58:33,110 --> 00:58:37,480
I ser ikollok mbagħad jistampa tiegħi
fenek estremament fancy.

1300
00:58:37,480 --> 00:58:40,600
U mbagħad ftit ftit ta 'tikek fl-aħħar.

1301
00:58:40,600 --> 00:58:45,220
>> U dawn it-tliet dikjarazzjonijiet istampar għandu
ħarsa familjari għalik f'dan il-punt.

1302
00:58:45,220 --> 00:58:47,350
Dak kollu li qed nagħmel fil
kull wieħed minnhom huwa jien

1303
00:58:47,350 --> 00:58:49,780
stampar ta 'sekwenza ta' karattri.

1304
00:58:49,780 --> 00:58:51,370
M'hemm l-ebda fatturi varjabbli involuti.

1305
00:58:51,370 --> 00:58:54,320
Kollox huwa biss ċatt.

1306
00:58:54,320 --> 00:58:55,270
KOLLOX SEW.

1307
00:58:55,270 --> 00:59:07,340
>> Mela jekk jien jinżlu issa biex terminal-- tiegħi
ejja ara jekk nista 'nikseb dan lura out--

1308
00:59:07,340 --> 00:59:09,370
u jien ser jerġa tip ċara.

1309
00:59:09,370 --> 00:59:12,507
>> SPEAKER 20: Do aħna nużaw l-
linja mmejla doppja biex jikkummentaw?

1310
00:59:12,507 --> 00:59:14,340
BRIAN SCASSELLATI: Jista
uża l-iva double--.

1311
00:59:14,340 --> 00:59:16,920
Hemm modi multipli lill
jħallu l-kummenti fil C. Wieħed

1312
00:59:16,920 --> 00:59:19,440
mod huwa li tuża l-mmejla doppja.

1313
00:59:19,440 --> 00:59:24,910
L-ieħor huwa l-użu slash u stilla
u mbagħad mill-qrib bi stilla u slash.

1314
00:59:24,910 --> 00:59:26,110
Kull dritt.

1315
00:59:26,110 --> 00:59:28,950
>> L-ewwelnett, jien ser
tibda jinnavigaw madwar hawn.

1316
00:59:28,950 --> 00:59:35,350
Mela jekk mmur direttorju dar tiegħi,
Stajt direttorji inbidlet hemm,

1317
00:59:35,350 --> 00:59:40,230
Jien ser tfittex u tara x'hemm
f'dak direttorju, ls, lista out.

1318
00:59:40,230 --> 00:59:43,230
Jien ser tara li stajt
ltqajna żewġ subdirectories.

1319
00:59:43,230 --> 00:59:47,910
Ejja jagħmlu dan ftit akbar
hawn sabiex inkunu nistgħu kollha jarawha.

1320
00:59:47,910 --> 00:59:50,610
>> I jista 'jara li stajt
ltqajna żewġ subdirectories.

1321
00:59:50,610 --> 00:59:53,510
I ser bidla direttorju
li jmorru fis workspace.

1322
00:59:53,510 --> 00:59:58,380
U jien ser biss tip out
parti minnha, u mbagħad biss hit Tab.

1323
00:59:58,380 --> 01:00:01,520
U inneħħu tikkompleta l-bqija għalija.

1324
01:00:01,520 --> 01:00:03,370
Fancy.

1325
01:00:03,370 --> 01:00:04,960
>> I ser tħares u ara fil workspace.

1326
01:00:04,960 --> 01:00:08,431
U d-dritt issa, jien jaħdmu
fuq il SuperSection

1327
01:00:08,431 --> 01:00:09,680
li aħna qed tagħlim dritt issa.

1328
01:00:09,680 --> 01:00:10,971
So I ser imorru f'dak direttorju.

1329
01:00:10,971 --> 01:00:14,770

1330
01:00:14,770 --> 01:00:15,970
U fl-aħħarnett, ħarsa u ara.

1331
01:00:15,970 --> 01:00:18,480
U stajt ltqajna dan il-fajl bunny.c.

1332
01:00:18,480 --> 01:00:20,980
>> Kull dritt so let me ċar għal darba oħra.

1333
01:00:20,980 --> 01:00:24,370
U jien ser now-- darb'oħra jien
xorta joqogħdu f'dak direttorju

1334
01:00:24,370 --> 01:00:27,540
u huwa javżak me jien fil
li direttorju SuperSection.

1335
01:00:27,540 --> 01:00:30,690
Jien ser jimxi 'l quddiem u
tagħmel fenek programm tiegħi.

1336
01:00:30,690 --> 01:00:33,730

1337
01:00:33,730 --> 01:00:38,810
U dak il-kmand, jagħmlu bunny,
filwaqt rokits ftit fard,

1338
01:00:38,810 --> 01:00:42,960
tinvoka wkoll l-kumpilatur clang.

1339
01:00:42,960 --> 01:00:46,470
>> U huwa prodott għall
me output li huwa

1340
01:00:46,470 --> 01:00:52,130
AN li funny-- eżekutibbli
fajl eżekutibbli imsejħa bunny.

1341
01:00:52,130 --> 01:00:52,700
KOLLOX SEW.

1342
01:00:52,700 --> 01:00:56,700
I jistgħu mbagħad, u dan ħsejjes
saħansitra agħar, tesegwixxi bunny.

1343
01:00:56,700 --> 01:00:59,360

1344
01:00:59,360 --> 01:01:00,680
KOLLOX SEW.

1345
01:01:00,680 --> 01:01:03,150
U ejja ara dak li tagħmel.

1346
01:01:03,150 --> 01:01:04,527
KOLLOX SEW.

1347
01:01:04,527 --> 01:01:06,360
Li xi ftit ta '
dak Jien kont qed nistenna.

1348
01:01:06,360 --> 01:01:11,290
Stajt ltqajna stampa fenek tiegħi fil hemm,
imma jien tip ta 'ridt kollha minnu stess.

1349
01:01:11,290 --> 01:01:13,186
What did I miss?

1350
01:01:13,186 --> 01:01:14,478
>> SPEAKER 21: Slash l jew mmejla n.

1351
01:01:14,478 --> 01:01:15,602
BRIAN SCASSELLATI: Slash n.

1352
01:01:15,602 --> 01:01:16,580
KOLLOX SEW.

1353
01:01:16,580 --> 01:01:18,800
Mela ejja jmorru lura out here.

1354
01:01:18,800 --> 01:01:20,330
U jien ser tikseb minn dak.

1355
01:01:20,330 --> 01:01:23,320
U jien ser imorru lura fis dan wieħed.

1356
01:01:23,320 --> 01:01:27,720
U ejja tagħti ħarsa issa
mill-funzjoni prinċipali tiegħi hawn.

1357
01:01:27,720 --> 01:01:29,280
>> Allura x'għandi nagħmel?

1358
01:01:29,280 --> 01:01:30,465
I tixtieq li ttemm il-linja.

1359
01:01:30,465 --> 01:01:34,020

1360
01:01:34,020 --> 01:01:35,800
So I ser jitqiegħdu fi kumment.

1361
01:01:35,800 --> 01:01:38,430
I ser jitqiegħdu fil-printf ().

1362
01:01:38,430 --> 01:01:41,350
U dak li għandi biex tistabbilixxi?

1363
01:01:41,350 --> 01:01:41,890
/ n.

1364
01:01:41,890 --> 01:01:43,480
KOLLOX SEW.

1365
01:01:43,480 --> 01:01:46,040
What do I jkollhom biex tintemm bl?

1366
01:01:46,040 --> 01:01:47,100
Virgola.

1367
01:01:47,100 --> 01:01:48,730
Kull dritt.

1368
01:01:48,730 --> 01:01:52,880
>> Issa, wieħed mill-verament
affarijiet importanti huwa li tiżgura

1369
01:01:52,880 --> 01:01:56,720
kull darba li inti tagħmel bidla
fil-kodiċi tiegħek, li inti tiffranka.

1370
01:01:56,720 --> 01:02:01,380
Jekk int ma ssejvjata kodiċi tiegħek, int
ser avviż stilla ftit up hemm.

1371
01:02:01,380 --> 01:02:03,420
U li star tgħid li inti
ma salvat dan il-kodiċi.

1372
01:02:03,420 --> 01:02:07,790
>> Jekk I josservawha dritt issa, mhuwiex
ser jirriflettu kwalunkwe minn dawk il-bidliet,

1373
01:02:07,790 --> 01:02:11,680
minħabba li l-kumpilatur iħares lejn il-file
li fuq id-diska, mhux il-fajl li l-

1374
01:02:11,680 --> 01:02:13,790
tiftaħ fl editur tiegħek.

1375
01:02:13,790 --> 01:02:14,290
Kull dritt.

1376
01:02:14,290 --> 01:02:20,830
>> Mela ejja ħlief u mbagħad aħna ser imorru
dritt fuq l isfel hawn, terga 'lura out.

1377
01:02:20,830 --> 01:02:24,670
Tinżel għal terminal tiegħi.

1378
01:02:24,670 --> 01:02:27,193
U ejja ċar l-ispazju mill-ġdid.

1379
01:02:27,193 --> 01:02:30,690

1380
01:02:30,690 --> 01:02:35,760
>> U aħna tista 'tmur quddiem u wieħed aktar
ħin jagħmlu program bunny tagħna.

1381
01:02:35,760 --> 01:02:40,180
U jesegwixxi l-fenek.

1382
01:02:40,180 --> 01:02:42,500
Li ma ħadmux jew.

1383
01:02:42,500 --> 01:02:43,950
Slash ħażin.

1384
01:02:43,950 --> 01:02:52,280
Mela jekk inti tħares lejn dak li stajt ltqajna, nressaq
/ n fil hemm, imma kelli l-mmejla ħażin.

1385
01:02:52,280 --> 01:02:56,190
>> Dak kollu li kompjuter tiegħek
ma huwa espliċitu ħafna.

1386
01:02:56,190 --> 01:02:57,230
KOLLOX SEW?

1387
01:02:57,230 --> 01:03:01,250
Wieħed żball żgħir ta 'punteġġjatura, u
f'daqqa waħda inti ma tieħux dak li trid.

1388
01:03:01,250 --> 01:03:01,750
Kull dritt.

1389
01:03:01,750 --> 01:03:03,740
Mela ejja zoom lura mill-ġdid.

1390
01:03:03,740 --> 01:03:04,410
Aħna ser imorru lura.

1391
01:03:04,410 --> 01:03:07,930
Ukoll tagħmel li t-tiswija malajr ħafna.

1392
01:03:07,930 --> 01:03:09,270
Aħna ser tpoġġi l-mmejla dritt.

1393
01:03:09,270 --> 01:03:10,570
Aħna ser tiffranka.

1394
01:03:10,570 --> 01:03:13,410
Aħna ser zoom lura fil.

1395
01:03:13,410 --> 01:03:16,730
>> Għal xi raġuni, li mhux
jkunu kuntenti, imma ejja imorru quddiem

1396
01:03:16,730 --> 01:03:19,850
u aħna ser imorru lura fit-terminals hawn.

1397
01:03:19,850 --> 01:03:22,940
Ċar it up.

1398
01:03:22,940 --> 01:03:24,880
Aħna ser zoom.

1399
01:03:24,880 --> 01:03:28,410
U wieħed aktar ħin, aħna ser tagħmel fenek.

1400
01:03:28,410 --> 01:03:32,360
U issa żgur biżżejjed, hija taħdem.

1401
01:03:32,360 --> 01:03:33,240
Hooray.

1402
01:03:33,240 --> 01:03:34,300
KOLLOX SEW.

1403
01:03:34,300 --> 01:03:39,580
>> Mela ejja jippruvaw jagħmlu dan
ftit aktar ġenerali.

1404
01:03:39,580 --> 01:03:46,750
Ejja ara jekk minflok sempliċiment
istampar frame wieħed partikolari,

1405
01:03:46,750 --> 01:03:49,610
ejja ara jekk nistgħu nagħmlu dan
sabiex inkunu nistgħu nikseb kollha 10

1406
01:03:49,610 --> 01:03:52,960
ta 'dawk frames animati
li ridna li jkollhom.

1407
01:03:52,960 --> 01:03:56,550
Għalhekk għal darb'oħra, ejja tagħti
dan pass fi żmien.

1408
01:03:56,550 --> 01:03:59,900
>> Ejja ewwel tiġġeneralizza dan, mhux
hekk li nagħmel l-frejms,

1409
01:03:59,900 --> 01:04:03,990
imma so I do xi wieħed
qafas li I tista 'tixtieq.

1410
01:04:03,990 --> 01:04:05,920
Allura x'inhu l-differenza
bejn il-frejms?

1411
01:04:05,920 --> 01:04:07,377
Huwa l-fenek l-istess?

1412
01:04:07,377 --> 01:04:07,960
UDJENZA: Iva.

1413
01:04:07,960 --> 01:04:08,390
BRIAN SCASSELLATI: Yeah.

1414
01:04:08,390 --> 01:04:09,370
X'hemm differenza?

1415
01:04:09,370 --> 01:04:10,246
>> UDJENZA: Pożizzjoni.

1416
01:04:10,246 --> 01:04:11,870
BRIAN SCASSELLATI: Pożizzjoni tagħha, id-dritt?

1417
01:04:11,870 --> 01:04:15,590
U kif nista tikkontrolla l-pożizzjoni tiegħu?

1418
01:04:15,590 --> 01:04:17,340
Kif tikek ħafna jien
tqegħid fil-bidu

1419
01:04:17,340 --> 01:04:19,048
u kemm tikek jien
tqegħid fl-aħħar.

1420
01:04:19,048 --> 01:04:21,970
So I kellha ħamsa fil-
bidu u ħamsa fl-aħħar.

1421
01:04:21,970 --> 01:04:28,320
>> Ejja jissostitwixxi dik ħamsa ma 'għall loop.

1422
01:04:28,320 --> 01:04:29,380
KOLLOX SEW.

1423
01:04:29,380 --> 01:04:32,330
U jien ser toħloq għall
loop issa li għaddej biex ngħid,

1424
01:04:32,330 --> 01:04:37,800
Jien ser jistampaw xi numru
ta 'tikek fil-bidu.

1425
01:04:37,800 --> 01:04:39,600
Jien ser tuża varjabbli.

1426
01:04:39,600 --> 01:04:44,150
Ejja ngħidu, kif madwar i kif
l-counter fil-linja tiegħi.

1427
01:04:44,150 --> 01:04:47,200
U jien ser tiddikjaraha top up.

1428
01:04:47,200 --> 01:04:49,360
>> U mbagħad fil-linja għal
I bżonn tagħmel tliet affarijiet.

1429
01:04:49,360 --> 01:04:52,340
L-ewwel ħaġa I bżonn tagħmel
huwa I bżonn initialize i.

1430
01:04:52,340 --> 01:04:56,570
X'għandi I initialize
li tibda tkun?

1431
01:04:56,570 --> 01:04:57,160
0.

1432
01:04:57,160 --> 01:04:58,310
KOLLOX SEW.

1433
01:04:58,310 --> 01:05:00,950
>> Imbagħad I bżonn li jgħidu, x'hemm
il-kundizzjoni terminazzjoni?

1434
01:05:00,950 --> 01:05:03,020
Meta għandi tieqaf?

1435
01:05:03,020 --> 01:05:05,983
Well kemm tikek taħseb
tixtieq li jistampaw fuq dan wieħed?

1436
01:05:05,983 --> 01:05:06,921
>> UDJENZA: Five.

1437
01:05:06,921 --> 01:05:08,170
BRIAN SCASSELLATI: ħames darb'oħra?

1438
01:05:08,170 --> 01:05:10,650
Kif dwar ejja jagħmlu xi ħaġa
differenti, għamilna ħamsa.

1439
01:05:10,650 --> 01:05:12,584
Ejja juru li huwa differenti.

1440
01:05:12,584 --> 01:05:13,250
SPEAKER 22: Żewġ.

1441
01:05:13,250 --> 01:05:13,580
BRIAN SCASSELLATI: Żewġ.

1442
01:05:13,580 --> 01:05:14,080
KOLLOX SEW.

1443
01:05:14,080 --> 01:05:17,760
Mela jekk irrid żewġ tikek,
x'għandi nressaq hawn?

1444
01:05:17,760 --> 01:05:19,140
>> UDJENZA: Tliet.

1445
01:05:19,140 --> 01:05:20,530
>> BRIAN SCASSELLATI: Tliet.

1446
01:05:20,530 --> 01:05:21,400
KOLLOX SEW.

1447
01:05:21,400 --> 01:05:24,220
Kif ħafna drabi hija li
se jmorru permezz?

1448
01:05:24,220 --> 01:05:28,469
Li għaddej biex jgħaddu
tliet darbiet, 0, 1, u 2, Dritt?

1449
01:05:28,469 --> 01:05:30,010
Kull dritt, ejja mur lura għal tnejn.

1450
01:05:30,010 --> 01:05:31,570
Issa aħna ser tingħata żewġ tikek.

1451
01:05:31,570 --> 01:05:35,800
U dak ma nixtieq li tagħmel kull
darba li mmur permezz tal-linja?

1452
01:05:35,800 --> 01:05:38,657
Liema għandha tinbidel
kull darba li mmur permezz?

1453
01:05:38,657 --> 01:05:39,850
>> SPEAKER 23: Żid dot.

1454
01:05:39,850 --> 01:05:41,020
>> BRIAN SCASSELLATI: I għandhom jibqgħu għaddejjin.

1455
01:05:41,020 --> 01:05:41,978
Jien ser iżżid dot.

1456
01:05:41,978 --> 01:05:45,310
Jien ser jistampaw dot,
kull darba permezz tal-linja.

1457
01:05:45,310 --> 01:05:49,990
Imma kif jien iżżomm rekord ta 'kif
ħafna drabi stajt kien permezz tal-linja?

1458
01:05:49,990 --> 01:05:53,260
Jien jużaw i, li
varjabbli, li counter.

1459
01:05:53,260 --> 01:05:57,110
>> Allura kull darba permezz ta ', jien ser
li inkrement-counter minn wieħed.

1460
01:05:57,110 --> 01:06:00,670
Issa, dan huwa l-istess għall
me kif qal i = i + 1.

1461
01:06:00,670 --> 01:06:01,210
Li OK.

1462
01:06:01,210 --> 01:06:04,653
I tista 'tagħmel dan that-- I bħall-
tajpisti, hekk jien se ngħid i ++.

1463
01:06:04,653 --> 01:06:07,190

1464
01:06:07,190 --> 01:06:08,370
KOLLOX SEW.

1465
01:06:08,370 --> 01:06:10,680
>> Ejja jagħmlu l-istess ħaġa
stabbiliti hawn fil-qiegħ.

1466
01:06:10,680 --> 01:06:11,846
Biss I tip ta did li wieħed.

1467
01:06:11,846 --> 01:06:13,990
Jien ser tavżak guys
tagħmel dan wieħed kompletament.

1468
01:06:13,990 --> 01:06:14,260
Kull dritt.

1469
01:06:14,260 --> 01:06:15,426
>> Allura dak li nikteb hawn?

1470
01:06:15,426 --> 01:06:17,170
Hawn tiegħi għal loop.

1471
01:06:17,170 --> 01:06:23,162
Jien ser tagħmel printf () u jien ser
biex tagħmel dan hekk li jien biss jistampaw wieħed dot

1472
01:06:23,162 --> 01:06:25,740
fuq dik qiegħ.

1473
01:06:25,740 --> 01:06:27,740
>> X'għandi I write
ġewwa dan għal loop issa?

1474
01:06:27,740 --> 01:06:30,897

1475
01:06:30,897 --> 01:06:33,948
Ukoll, qabel kollox dak
varjabbli għandi nuża?

1476
01:06:33,948 --> 01:06:35,430
>> SPEAKER 24: j.

1477
01:06:35,430 --> 01:06:36,880
>> BRIAN SCASSELLATI: I jistgħu jużaw j.

1478
01:06:36,880 --> 01:06:38,040
Nista 'nuża l-istess waħda?

1479
01:06:38,040 --> 01:06:39,961
Nista 'nuża i mill-ġdid?

1480
01:06:39,961 --> 01:06:40,460
Yeah.

1481
01:06:40,460 --> 01:06:45,531
Dak OK, minħabba li l-Jinsab
li jien jużaw up here,

1482
01:06:45,531 --> 01:06:47,780
I m'għandhomx bżonn jerġgħu meta
I nikseb stabbiliti għal dan il-punt.

1483
01:06:47,780 --> 01:06:52,240

1484
01:06:52,240 --> 01:06:53,790
>> Allura dak li jien initialize i li?

1485
01:06:53,790 --> 01:06:56,675

1486
01:06:56,675 --> 01:06:57,300
SPEAKER 25: 10.

1487
01:06:57,300 --> 01:06:58,567
BRIAN SCASSELLATI: 0.

1488
01:06:58,567 --> 01:06:59,400
X'għandi I check?

1489
01:06:59,400 --> 01:07:02,960
Kemm tikek għandi bżonn issa fl-aħħar
jekk Stajt ltqajna żewġ tikek fil-bidu?

1490
01:07:02,960 --> 01:07:05,820

1491
01:07:05,820 --> 01:07:09,165
I bżonn tmien fl-aħħar, sabiex dak
għandi jivverifikaw, i inqas than--

1492
01:07:09,165 --> 01:07:12,645
>> UDJENZA: Seba, tmienja, disgħa.

1493
01:07:12,645 --> 01:07:14,020
BRIAN SCASSELLATI: Smajt sebgħa.

1494
01:07:14,020 --> 01:07:14,810
Smajt tmienja.

1495
01:07:14,810 --> 01:07:15,970
U smajt disa.

1496
01:07:15,970 --> 01:07:16,470
KOLLOX SEW.

1497
01:07:16,470 --> 01:07:19,540
Allura aħna qed kollha fid-dritt
ball-- Jason jgħid 10.

1498
01:07:19,540 --> 01:07:21,550
KOLLOX SEW.

1499
01:07:21,550 --> 01:07:25,920
>> Jekk I meħtieġa żewġ tikek għal
l-ewwel waħda, kemm do

1500
01:07:25,920 --> 01:07:30,170
I-- u għandi bżonn tmien tikek għall-
aħħar one-- Nressaq żewġ up hawn fuq,

1501
01:07:30,170 --> 01:07:31,743
x'għandi nagħmel jħott hawn taħt?

1502
01:07:31,743 --> 01:07:32,570
>> UDJENZA: Tmienja.

1503
01:07:32,570 --> 01:07:33,611
>> BRIAN SCASSELLATI: Tmienja.

1504
01:07:33,611 --> 01:07:35,695
Minħabba li għaddej biex
għadd żero permezz sebgħa.

1505
01:07:35,695 --> 01:07:38,490
U li tmien darbiet permezz tal-loop.

1506
01:07:38,490 --> 01:07:38,990
KOLLOX SEW.

1507
01:07:38,990 --> 01:07:41,774
U dak li nagħmel fl-aħħar?

1508
01:07:41,774 --> 01:07:42,670
>> UDJENZA: i ++.

1509
01:07:42,670 --> 01:07:44,400
>> BRIAN SCASSELLATI: i ++.

1510
01:07:44,400 --> 01:07:45,440
Kull dritt.

1511
01:07:45,440 --> 01:07:48,260
Allura li qed ifittxu pjuttost tajba hemmhekk.

1512
01:07:48,260 --> 01:07:50,620
Ejja nippruvaw dan u ejja ara dak li tagħmel.

1513
01:07:50,620 --> 01:07:51,450
KOLLOX SEW.

1514
01:07:51,450 --> 01:07:53,770
Allura aħna qed tmur biex isalvawh.

1515
01:07:53,770 --> 01:07:54,940
Nizza u salvati.

1516
01:07:54,940 --> 01:07:56,910
>> Aħna ser zoom lura out.

1517
01:07:56,910 --> 01:07:58,220
Aħna ser jippruvaw hawn fit-terminal.

1518
01:07:58,220 --> 01:08:01,440

1519
01:08:01,440 --> 01:08:02,970
Aħna ser zoom.

1520
01:08:02,970 --> 01:08:05,416
Oops.

1521
01:08:05,416 --> 01:08:09,990
Aħna ser, wieħed aktar ħin,
jagħmlu program fenek tagħna.

1522
01:08:09,990 --> 01:08:14,460
U jimxi 'l quddiem u tesegwixxi bunny.

1523
01:08:14,460 --> 01:08:15,980
U hemm hu.

1524
01:08:15,980 --> 01:08:17,710
>> Allura hemm bunny tagħna.

1525
01:08:17,710 --> 01:08:25,130
Fejn għandu żewġ tikek fil-bidu
u tmien tikek barra fl-aħħar.

1526
01:08:25,130 --> 01:08:27,540
Kulħadd għadu miegħi?

1527
01:08:27,540 --> 01:08:28,770
KOLLOX SEW.

1528
01:08:28,770 --> 01:08:29,580
>> Allura aħna mibnija it up.

1529
01:08:29,580 --> 01:08:33,000
Aħna mibnija fenek waħda,
frame wieħed partikolari.

1530
01:08:33,000 --> 01:08:36,229
Issa aħna kont qed kapaċi
tiġġeneralizza li biex jibnu

1531
01:08:36,229 --> 01:08:38,390
aktar, tipi differenti ta 'frejmijiet.

1532
01:08:38,390 --> 01:08:42,399
>> Issa ejja aqbad, u jkollhom
dan jiġġenera mhux biss wieħed frame,

1533
01:08:42,399 --> 01:08:46,290
imma ejja jiġġeneraw 10
frejms, fejn aħna bil-mod

1534
01:08:46,290 --> 01:08:50,569
jagħmlu l-fenek jiċċaqalqu kollha
il-mod madwar il-qasam.

1535
01:08:50,569 --> 01:08:51,430
Kull dritt.

1536
01:08:51,430 --> 01:08:53,660
>> Ejja ħa mmorru lura.

1537
01:08:53,660 --> 01:08:54,839
U aħna ser nippruvaw issa.

1538
01:08:54,839 --> 01:09:00,680

1539
01:09:00,680 --> 01:09:02,830
Mela xi do I really bżonn għall-bidla hawn?

1540
01:09:02,830 --> 01:09:06,139

1541
01:09:06,139 --> 01:09:07,180
What do I bżonn għall-bidla?

1542
01:09:07,180 --> 01:09:10,638
>> SPEAKER 26: Inti l-ewwel bżonn biex
jibdlu l-għadd ta 'massimu tikek

1543
01:09:10,638 --> 01:09:11,626
fil-bidu.

1544
01:09:11,626 --> 01:09:16,850
Għaliex jekk aħna qed tagħmel 10 tikek,
li għaddej biex bżonn sa iskala.

1545
01:09:16,850 --> 01:09:17,850
BRIAN SCASSELLATI: Yeah.

1546
01:09:17,850 --> 01:09:23,760
Allura issa dritt I jkollhom dan it-tip ta hardwired
li dejjem tagħmel żewġ tikek fil-bidu

1547
01:09:23,760 --> 01:09:27,890
u dejjem jagħmlu tmien tikek fl-aħħar.

1548
01:09:27,890 --> 01:09:30,660
>> Irrid li jibnu linja ieħor, id-dritt?

1549
01:09:30,660 --> 01:09:33,290
Minħabba I ma jridux
jibnu biss stampa wieħed fenek,

1550
01:09:33,290 --> 01:09:37,140
Irrid li jibnu 10 stampi bunny.

1551
01:09:37,140 --> 01:09:41,500
So I bżonn li tinbena linja ieħor,
u kif I jgħaddu dik loop,

1552
01:09:41,500 --> 01:09:44,660
I trid tibdel kemm
tikek I jistampaw fil-bidu

1553
01:09:44,660 --> 01:09:50,529
u kemm tikek I jistampaw fl-aħħar,
ibbażati fuqhom ċiklu permezz tal-linja

1554
01:09:50,529 --> 01:09:52,270
Jien fil.

1555
01:09:52,270 --> 01:09:52,770
Kull dritt.

1556
01:09:52,770 --> 01:09:54,430
>> Mela ejja nikseb counter ieħor.

1557
01:09:54,430 --> 01:09:58,142
Xi ħadd qabel qal j,
hekk aħna ser tagħmel j ieħor.

1558
01:09:58,142 --> 01:10:00,100
U issa, aħna qed tmur biex
jibnu ieħor għall loop.

1559
01:10:00,100 --> 01:10:02,650

1560
01:10:02,650 --> 01:10:06,200
>> Dak li jmur ġewwa li loop?

1561
01:10:06,200 --> 01:10:09,060
Dan il-għalf irid imur
ġewwa l-linja, id-dritt?

1562
01:10:09,060 --> 01:10:11,190
Il-fenek jkollhom
li jmorru ġewwa l-linja?

1563
01:10:11,190 --> 01:10:13,390
Għandi bżonn fenek fl
kull waħda minn dawn 10 frames?

1564
01:10:13,390 --> 01:10:14,099
>> UDJENZA: Uh-huh.

1565
01:10:14,099 --> 01:10:15,098
BRIAN SCASSELLATI: Yeah.

1566
01:10:15,098 --> 01:10:17,250
Irrid fenek f'kull
mill-10 frames, id-dritt?

1567
01:10:17,250 --> 01:10:20,531
Kif dwar l-tikek fil
l-aħħar, għandi bżonn dan?

1568
01:10:20,531 --> 01:10:21,030
KOLLOX SEW.

1569
01:10:21,030 --> 01:10:22,550
>> Hekk jien ser inċiż kull wieħed minnhom.

1570
01:10:22,550 --> 01:10:25,110
Jien ser tenfasizza kollha
dan, u jien ser jintlaqtu Tab.

1571
01:10:25,110 --> 01:10:28,590
U li għaddej biex jimbuttaw lilhom kollha fuq
ftit, b'tali mod li huwa faċli għalija

1572
01:10:28,590 --> 01:10:32,010
biex tara x'hemm fil-linja.

1573
01:10:32,010 --> 01:10:33,710
U mbagħad I ser jispiċċaw dan.

1574
01:10:33,710 --> 01:10:35,850
Ejja ngħidu.

1575
01:10:35,850 --> 01:10:36,430
KOLLOX SEW?

1576
01:10:36,430 --> 01:10:39,230
>> Issa, f'dan il-loop li
Jien Whoops building--,

1577
01:10:39,230 --> 01:10:43,810
tagħmel li sabiex inti tista see--
Stajt ltqajna counter j tiegħi.

1578
01:10:43,810 --> 01:10:45,630
I ser beda dan ta '0.

1579
01:10:45,630 --> 01:10:47,829
Kif ħafna drabi ma nixtieq
li jmorru permezz ta 'dan loop?

1580
01:10:47,829 --> 01:10:48,620
UDJENZA: 10 darbiet.

1581
01:10:48,620 --> 01:10:49,786
BRIAN SCASSELLATI: 10 darbiet.

1582
01:10:49,786 --> 01:10:51,402
Allura dak in-numru għandu nressaq hawn?

1583
01:10:51,402 --> 01:10:52,880
>> UDJENZA: 9, 10.

1584
01:10:52,880 --> 01:10:55,600
>> BRIAN SCASSELLATI: 9, 10,
xi ħadd ltqajna biex jgħidu 11, id-dritt?

1585
01:10:55,600 --> 01:10:58,190

1586
01:10:58,190 --> 01:11:01,585
Jien ridt żewġ tikek qabel
u mqiegħda i inqas minn 2.

1587
01:11:01,585 --> 01:11:03,810
Jien ridt tmien tikek,
Nressaq i inqas minn 8.

1588
01:11:03,810 --> 01:11:06,950
Issa nixtieq li jmorru permezz 10
drabi, so I tpoġġi j inqas than--

1589
01:11:06,950 --> 01:11:07,590
>> UDJENZA: 10.

1590
01:11:07,590 --> 01:11:08,610
>> BRIAN SCASSELLATI: 10.

1591
01:11:08,610 --> 01:11:10,150
Hemm immorru.

1592
01:11:10,150 --> 01:11:13,360
U x'għandi nagħmel fl-aħħar li j?

1593
01:11:13,360 --> 01:11:15,310
++, Inkrement dan.

1594
01:11:15,310 --> 01:11:16,230
KOLLOX SEW.

1595
01:11:16,230 --> 01:11:21,500
Issa, hawnhekk l-parti delikata, x'hemm
jiġri dritt issa jekk nagħmel dan?

1596
01:11:21,500 --> 01:11:24,537
Am I morna għall-istampa 10 frames?

1597
01:11:24,537 --> 01:11:26,370
SPEAKER 27: Naħseb
dawn kollha ser ikunu l-istess.

1598
01:11:26,370 --> 01:11:28,453
BRIAN SCASSELLATI: Huma ser
kollha jkunu l-istess, id-dritt?

1599
01:11:28,453 --> 01:11:31,750
Minħabba li kull wieħed minnhom għadhom għaddejjin
li tqiegħed żewġ tikek fil-bidu.

1600
01:11:31,750 --> 01:11:34,162
Imma jien ma jriduhomx kollha li
għandhom żewġ tikek-bidu.

1601
01:11:34,162 --> 01:11:35,870
Kemm tikek do I
tixtieq fil-bidu?

1602
01:11:35,870 --> 01:11:39,097

1603
01:11:39,097 --> 01:11:40,020
>> UDJENZA: Nibdlu.

1604
01:11:40,020 --> 01:11:42,840
>> BRIAN SCASSELLATI: I
tixtieq għall-bidla, id-dritt?

1605
01:11:42,840 --> 01:11:46,588
Mela xi do għandi hawn li l-jinbidlu
kull darba li l-linja tmur permezz?

1606
01:11:46,588 --> 01:11:48,242
>> UDJENZA: Numru ta 'tikek, j.

1607
01:11:48,242 --> 01:11:49,950
BRIAN SCASSELLATI: j,
in-numru ta 'tikek.

1608
01:11:49,950 --> 01:11:54,782
So I jistgħu jbiddlu dan ikun j.

1609
01:11:54,782 --> 01:11:59,190
L-ewwel darba permezz tal-
loop, dak li li għaddej biex tkun?

1610
01:11:59,190 --> 01:12:01,700
What do I sett j biex primarjament?

1611
01:12:01,700 --> 01:12:02,420
>> UDJENZA: 0.

1612
01:12:02,420 --> 01:12:05,700
>> BRIAN SCASSELLATI: Allura kif ħafna
drabi am I se tagħmel dan?

1613
01:12:05,700 --> 01:12:06,750
0.

1614
01:12:06,750 --> 01:12:11,750
It-tieni darba min-loop, j tal
se tkun l-1 minħabba I inkrement fiha.

1615
01:12:11,750 --> 01:12:14,180
Kemm tikek am I morna għall-istampa?

1616
01:12:14,180 --> 01:12:15,100
1.

1617
01:12:15,100 --> 01:12:19,904
It-tielet darba permezz tal-linja,
kemm tikek am I morna għall-istampa?

1618
01:12:19,904 --> 01:12:20,587
>> UDJENZA: Tliet.

1619
01:12:20,587 --> 01:12:22,170
BRIAN SCASSELLATI: j se jkun ta '3.

1620
01:12:22,170 --> 01:12:24,890
Kemm tikek am I morna għall-istampa?

1621
01:12:24,890 --> 01:12:26,817
Oh, sorry, j għaddej biex tkun ta '2.

1622
01:12:26,817 --> 01:12:28,233
Kemm tikek am I morna għall-istampa?

1623
01:12:28,233 --> 01:12:28,980
>> UDJENZA: 2.

1624
01:12:28,980 --> 01:12:29,855
>> BRIAN SCASSELLATI: 2.

1625
01:12:29,855 --> 01:12:32,460
OK, hekk jien ser iżommu
inkrementazzjoni li kif aħna jmorru flimkien.

1626
01:12:32,460 --> 01:12:33,460
Kif dwar stabbiliti hawn taħt?

1627
01:12:33,460 --> 01:12:34,310
Liema jinżel hawn?

1628
01:12:34,310 --> 01:12:38,080
Ma rridx 8 dejjem
fl-aħħar jibqgħalu?

1629
01:12:38,080 --> 01:12:39,269
>> SPEAKER 28: 10.

1630
01:12:39,269 --> 01:12:40,685
BRIAN SCASSELLATI: Irrid 10 tikek?

1631
01:12:40,685 --> 01:12:43,440

1632
01:12:43,440 --> 01:12:44,620
Irrid li jibdlu, wisq.

1633
01:12:44,620 --> 01:12:47,469
Allura kif nixtieq li bidla?

1634
01:12:47,469 --> 01:12:49,167
>> UDJENZA: [inaudible].

1635
01:12:49,167 --> 01:12:51,750
BRIAN SCASSELLATI: Well, jekk I
għandhom ħames tikek fil-bidu,

1636
01:12:51,750 --> 01:12:53,293
Kif jgħid dot ħafna nista 'nikseb fl-aħħar?

1637
01:12:53,293 --> 01:12:54,020
>> UDJENZA: Five.

1638
01:12:54,020 --> 01:12:55,630
>> BRIAN SCASSELLATI: Jekk ikolli
sitt tikek fil-bidu,

1639
01:12:55,630 --> 01:12:56,875
kemm nista 'nikseb fl-aħħar?

1640
01:12:56,875 --> 01:12:57,500
UDJENZA: Erba.

1641
01:12:57,500 --> 01:12:58,950
BRIAN SCASSELLATI: Jekk sibt
seba tikek fil-bidu,

1642
01:12:58,950 --> 01:13:00,204
kemm nista 'nikseb fl-aħħar?

1643
01:13:00,204 --> 01:13:00,870
UDJENZA: Tliet.

1644
01:13:00,870 --> 01:13:03,161
BRIAN SCASSELLATI: Jekk stajt
ltqajna tikek j fil-bidu,

1645
01:13:03,161 --> 01:13:04,790
kemm nista 'nikseb fl-aħħar?

1646
01:13:04,790 --> 01:13:07,520
10-j.

1647
01:13:07,520 --> 01:13:08,650
KOLLOX SEW.

1648
01:13:08,650 --> 01:13:10,390
Mela ejja jippruvaw li l-.

1649
01:13:10,390 --> 01:13:13,180
>> Hekk jien ser jiffranka programm fenek tagħna.

1650
01:13:13,180 --> 01:13:16,270
Għal darb'oħra aħna ser zoom out.

1651
01:13:16,270 --> 01:13:19,090
Aħna ser jinżlu għal terminal tagħna.

1652
01:13:19,090 --> 01:13:20,180
Aħna ser ċar dan.

1653
01:13:20,180 --> 01:13:23,410
U zoom in.

1654
01:13:23,410 --> 01:13:26,410
Aħna ser tagħmel programm bunny tagħna, għal darb'oħra.

1655
01:13:26,410 --> 01:13:27,690
U aħna ser esegwit.

1656
01:13:27,690 --> 01:13:30,462

1657
01:13:30,462 --> 01:13:32,090
Uh-oh.

1658
01:13:32,090 --> 01:13:34,580
>> Żomm fuq, ejja zoom out.

1659
01:13:34,580 --> 01:13:36,860
Did I nikseb 10 frames?

1660
01:13:36,860 --> 01:13:38,970
Ukoll, kemm bunnies
narax up hemm?

1661
01:13:38,970 --> 01:13:43,330
1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

1662
01:13:43,330 --> 01:13:44,820
Sibt 10 frames.

1663
01:13:44,820 --> 01:13:46,375
Dawn huma kollha l-istess?

1664
01:13:46,375 --> 01:13:47,000
UDJENZA: Yeah.

1665
01:13:47,000 --> 01:13:48,740
No

1666
01:13:48,740 --> 01:13:50,000
>> BRIAN SCASSELLATI: Le

1667
01:13:50,000 --> 01:13:55,050
Li l-ewwel waħda, il-
fenek huwa ħafna fuq ix-xellug.

1668
01:13:55,050 --> 01:13:57,541
U hawn, il-fenek huwa ħafna fuq il-

1669
01:13:57,541 --> 01:13:58,290
SPEAKER 29: Dritt.

1670
01:13:58,290 --> 01:14:00,502
BRIAN SCASSELLATI: Allura,
dak li ma ninsa li tagħmel?

1671
01:14:00,502 --> 01:14:01,750
SPEAKER 30: Ibda linja ġdida.

1672
01:14:01,750 --> 01:14:04,041
BRIAN SCASSELLATI: Insejt
biex tibda linja ġdida, għal darb'oħra.

1673
01:14:04,041 --> 01:14:05,270
Istess żball I magħmula qabel.

1674
01:14:05,270 --> 01:14:07,120
Kull dritt, ejja go jiffissaw dak.

1675
01:14:07,120 --> 01:14:11,690
Issa, stajt għadhom kisbu l-kodiċi
fil hemm biex jagħmlu linja ġdida.

1676
01:14:11,690 --> 01:14:13,899
Għaliex ma taħdem?

1677
01:14:13,899 --> 01:14:15,440
SPEAKER 31: Mhuwiex ġewwa l-linja.

1678
01:14:15,440 --> 01:14:17,710
BRIAN SCASSELLATI: Oh,
mhuwiex ġewwa l-linja.

1679
01:14:17,710 --> 01:14:18,520
Dak id-dritt.

1680
01:14:18,520 --> 01:14:20,150
Huwa seduta barra hawn.

1681
01:14:20,150 --> 01:14:23,470

1682
01:14:23,470 --> 01:14:29,050
U l-linja huwa kollox għal
dan huwa ġewwa dak it-test.

1683
01:14:29,050 --> 01:14:35,500
>> Hekk jien ser jiċċaqalqu
dan ġewwa l-għar loop.

1684
01:14:35,500 --> 01:14:39,410
U jien ser Tab quddiem ta 'dan lill
juru li huwa fil-post it-tajjeb.

1685
01:14:39,410 --> 01:14:42,020
U issa, aħna ser tiffranka mill-ġdid.

1686
01:14:42,020 --> 01:14:44,350
Aħna ser zoom out.

1687
01:14:44,350 --> 01:14:45,770
Aħna ser jisswiċċja għall terminal tagħna.

1688
01:14:45,770 --> 01:14:48,330

1689
01:14:48,330 --> 01:14:50,360
Zoom.

1690
01:14:50,360 --> 01:14:54,050
Aħna ser remake programm bunny tagħna.

1691
01:14:54,050 --> 01:14:59,070
U issa, issa konna ltqajna 10 frejms tagħna.

1692
01:14:59,070 --> 01:15:00,190
>> [Clapping]

1693
01:15:00,190 --> 01:15:02,120
>> BRIAN SCASSELLATI: OK.

1694
01:15:02,120 --> 01:15:04,080
So.

1695
01:15:04,080 --> 01:15:08,370
Hawnhekk huwa tagħna nested għal-linji.

1696
01:15:08,370 --> 01:15:13,140
Konna kapaċi jiġġeneraw fil-
loop ġewwa kemm tikek jien ridt

1697
01:15:13,140 --> 01:15:15,320
li jistampaw fil-bidu, fl-aħħar.

1698
01:15:15,320 --> 01:15:21,570
U l-linja ta 'barra kkontrollata
kif frames ħafna I kien bini.

1699
01:15:21,570 --> 01:15:26,340
Bdejna bi ftit wieħed
għadma tal-problema,

1700
01:15:26,340 --> 01:15:30,320
u aħna mibnija barra mill-punt.

1701
01:15:30,320 --> 01:15:30,820
Kull dritt.

1702
01:15:30,820 --> 01:15:33,500
>> Ejja nagħmlu pass aktar.

1703
01:15:33,500 --> 01:15:35,040
Inti lest?

1704
01:15:35,040 --> 01:15:38,800
Hemm ħaġa waħda fil hawn fejn
konna attwalment tip ta 'ltqajna

1705
01:15:38,800 --> 01:15:42,180
aktar kumplessità milli għandna bżonn.

1706
01:15:42,180 --> 01:15:44,700
Ejja tagħti ħarsa.

1707
01:15:44,700 --> 01:15:52,050
Allura fil-programm bunny tagħna,
jekk I zoom out hawn,

1708
01:15:52,050 --> 01:15:54,980
I attwalment jagħmlu xi wħud mill-istess
ħaġa aktar u aktar mill-ġdid.

1709
01:15:54,980 --> 01:15:59,032
What do I do dan huwa tip ta '
l-istess ħaġa ripetuti darbtejn?

1710
01:15:59,032 --> 01:16:00,310
>> SPEAKER 32: Stampa l-tikek.

1711
01:16:00,310 --> 01:16:03,526
>> BRIAN SCASSELLATI: Yeah
I jistampaw dawk tikek darbtejn.

1712
01:16:03,526 --> 01:16:05,710
Really, I għandu jkollhom
dan il-kumment stabbiliti hawn.

1713
01:16:05,710 --> 01:16:09,037
I jistampaw xi tikek fil-
bidu, id-dritt up here.

1714
01:16:09,037 --> 01:16:10,620
U mbagħad I jistampaw xi tikek fl-aħħar.

1715
01:16:10,620 --> 01:16:14,694
U jien tip ta 'eżattament l-istess ħaġa.

1716
01:16:14,694 --> 01:16:17,110
Dak li aħna qed tmur biex tibda
jaħdmu fuq fil-ġimgħat li ġejjin

1717
01:16:17,110 --> 01:16:23,440
qed kapaċi li tieħu dawk il-blokki ta '
kodiċi li nużaw aktar u aktar mill-ġdid,

1718
01:16:23,440 --> 01:16:25,800
u permezz ta 'proċess
imsejħa estrazzjoni,

1719
01:16:25,800 --> 01:16:31,100
aħna qed tmur biex tiġbed out u
jiktbu għalihom ladarba sabiex inkunu nistgħu mbagħad

1720
01:16:31,100 --> 01:16:35,130
jerġgħu jużawhom aktar u aktar mill-ġdid.

1721
01:16:35,130 --> 01:16:37,210
Mela ejja jippruvaw dan.

1722
01:16:37,210 --> 01:16:38,220
Lest?

1723
01:16:38,220 --> 01:16:42,200
>> Aħna qed tmur biex tieħu din blokk ta 'kodiċi.

1724
01:16:42,200 --> 01:16:45,280
U jien ser teħodha minn hemmhekk.

1725
01:16:45,280 --> 01:16:50,530
U jien ser define--
stabbiliti fuq il-qiegħ,

1726
01:16:50,530 --> 01:16:53,130
Jien ser jiktbu funzjoni ġdida.

1727
01:16:53,130 --> 01:16:54,750
Mhuwiex ser jirritornaw xejn.

1728
01:16:54,750 --> 01:16:58,550
U jien ser sejħa hija printDots.

1729
01:16:58,550 --> 01:17:01,530
>> Huwa ser jieħu waħda
argument, integer li

1730
01:17:01,530 --> 01:17:04,920
jgħid howManyDots I għandhom jistampaw.

1731
01:17:04,920 --> 01:17:09,310

1732
01:17:09,310 --> 01:17:17,720
U issa minflok ta 'stampar tikek j, I ser
print tell howManyDots I għandhom jistampaw.

1733
01:17:17,720 --> 01:17:21,581
>> U hemm problema waħda ftit hawn.

1734
01:17:21,581 --> 01:17:22,580
Kulmin jafu għalxiex?

1735
01:17:22,580 --> 01:17:27,270

1736
01:17:27,270 --> 01:17:31,505
What do I jkollhom li l-elenkat
fil hawn li mhux definit?

1737
01:17:31,505 --> 01:17:34,165

1738
01:17:34,165 --> 01:17:35,090
>> UDJENZA: [inaudible]

1739
01:17:35,090 --> 01:17:37,465
>> BRIAN SCASSELLATI: Well kif
ħafna tikek hija definita dritt up

1740
01:17:37,465 --> 01:17:40,584
hawn, imma jien jużaw dak il-varjabbli i.

1741
01:17:40,584 --> 01:17:43,750
Hekk jien ser jieħdu dik varjabbli i
u jien ser jiddefinixxu l-isfel fil hawn

1742
01:17:43,750 --> 01:17:44,610
minflok.

1743
01:17:44,610 --> 01:17:49,683
>> Allura issa li għaddej biex stay-- oops,
ltqajna l-limiti lock fuq somehow-- jien

1744
01:17:49,683 --> 01:17:52,060
se jżomm i fl hawn.

1745
01:17:52,060 --> 01:17:57,050
>> Allura issa hawnhekk funzjoni tiegħi ftit
jew sub-rutina, u jgħid,

1746
01:17:57,050 --> 01:18:00,640
kemm tikek am I morna għall-istampa?

1747
01:18:00,640 --> 01:18:05,300
U inneħħu jmorru permezz ta 'dan loop u
tipprintjahom fuq u aktar mill-ġdid.

1748
01:18:05,300 --> 01:18:10,940
>> I jistgħu mbagħad emendat il-programm tiegħi up here.

1749
01:18:10,940 --> 01:18:12,540
U dak li għamlet I-sejħa dik il-funzjoni?

1750
01:18:12,540 --> 01:18:13,960
printDots.

1751
01:18:13,960 --> 01:18:17,060
So I ser sejħa printDots.

1752
01:18:17,060 --> 01:18:21,530
Kemm tikek ma nixtieq li jistampaw
l-ewwel darba qabel il-fenek?

1753
01:18:21,530 --> 01:18:22,030
UDJENZA: j.

1754
01:18:22,030 --> 01:18:23,230
BRIAN SCASSELLATI: j.

1755
01:18:23,230 --> 01:18:27,110
Kemm tikek ma nixtieq li jistampaw
fl-aħħar, wara l-fenek?

1756
01:18:27,110 --> 01:18:30,610

1757
01:18:30,610 --> 01:18:31,110
10-j.

1758
01:18:31,110 --> 01:18:35,020

1759
01:18:35,020 --> 01:18:38,010
>> U hemm ħaġa waħda jien nieqsa.

1760
01:18:38,010 --> 01:18:43,740
Kif inti raw fil lecture llum,
aħna qed tmur biex tiddikjara printDots

1761
01:18:43,740 --> 01:18:52,430
up fuq imsemmi sabiex il-prototip.

1762
01:18:52,430 --> 01:18:56,740

1763
01:18:56,740 --> 01:18:58,220
KOLLOX SEW.

1764
01:18:58,220 --> 01:19:03,530
>> Allura dak I ghamilt hija stajt ppruvaw
jiżolaw dik il-parti jerġgħu jintużaw mill-kodiċi

1765
01:19:03,530 --> 01:19:06,430
li jien ghamilt fuq u aktar mill-ġdid.

1766
01:19:06,430 --> 01:19:11,120
U stajt ppruvaw pull it out b'tali mod li
kollha ta 'dak tinsab f'post wieħed.

1767
01:19:11,120 --> 01:19:16,810
B'dan il-mod, jekk ikolli żball x'imkien,
I biss ikollha tiffissa lilha fil-post wieħed.

1768
01:19:16,810 --> 01:19:17,310
Kull dritt.

1769
01:19:17,310 --> 01:19:18,470
>> Mela ejja isalvawh.

1770
01:19:18,470 --> 01:19:20,950
U ejja kun żgur taħdem.

1771
01:19:20,950 --> 01:19:22,050
Mela ejja jmorru barra.

1772
01:19:22,050 --> 01:19:25,200
Aħna ser imorru għal darb'oħra biex terminal tagħna.

1773
01:19:25,200 --> 01:19:27,960
Aħna ser zoom.

1774
01:19:27,960 --> 01:19:31,010
Aħna ser tagħmel dak il-proċess bunny.

1775
01:19:31,010 --> 01:19:32,380
>> Oh.

1776
01:19:32,380 --> 01:19:34,800
U huwa tani twissija.

1777
01:19:34,800 --> 01:19:37,070
X'inhu javżak me?

1778
01:19:37,070 --> 01:19:39,870
Ukoll fi kwalunkwe minn dawn
drabi, inti dejjem trid

1779
01:19:39,870 --> 01:19:44,170
iscroll sal-ewwel error--
issa fuq dan wieħed, stajt biss ltqajna wieħed.

1780
01:19:44,170 --> 01:19:52,700
>> Hija jgħidlekx me fil bunny.c, fuq il-linja
8, kolonna 9, hemm problema.

1781
01:19:52,700 --> 01:19:58,650
Hija tgħid, inti ħadthom iddikjarat dan
varjabbli iu inti ma jkunux użati.

1782
01:19:58,650 --> 01:20:02,230
>> Issa normalment, li l-
mhux l-agħar żball.

1783
01:20:02,230 --> 01:20:04,300
Li wieħed faċli biex jiffissaw.

1784
01:20:04,300 --> 01:20:07,550
U fil-fatt, nistgħu mmorru lura fl.

1785
01:20:07,550 --> 01:20:09,910
Aħna tista 'tmur lura bunny.

1786
01:20:09,910 --> 01:20:13,010
U f'dan il-każ, kollox aħna
għandek tagħmel hu jeħles i,

1787
01:20:13,010 --> 01:20:16,630
għaliex aħna ma tkunx qed tużah
i fi ħdan prinċipali aktar.

1788
01:20:16,630 --> 01:20:19,860
Aħna biss tużaha
fi ħdan is-rutina tagħna.

1789
01:20:19,860 --> 01:20:22,777
>> Mela ejja ħlief li.

1790
01:20:22,777 --> 01:20:23,360
Aħna ser imorru lura.

1791
01:20:23,360 --> 01:20:26,760

1792
01:20:26,760 --> 01:20:28,630
U zoom in.

1793
01:20:28,630 --> 01:20:30,700
Aħna ser waħda aktar ħin tagħmel fenek.

1794
01:20:30,700 --> 01:20:33,810

1795
01:20:33,810 --> 01:20:36,530
U hemmhekk mill-ġdid huma 10 frames tagħna.

1796
01:20:36,530 --> 01:20:39,450

1797
01:20:39,450 --> 01:20:41,360
KOLLOX SEW.

1798
01:20:41,360 --> 01:20:43,190
>> Kwalunkwe ħin li inti qed tingħata
a procedure-- Yeah.

1799
01:20:43,190 --> 01:20:44,690
SPEAKER 33: I jkollhom a-- jien konfuż.

1800
01:20:44,690 --> 01:20:45,892
Inti tista 'tmur lura għall-kodiċi?

1801
01:20:45,892 --> 01:20:46,850
BRIAN SCASSELLATI: Yep.

1802
01:20:46,850 --> 01:20:50,730

1803
01:20:50,730 --> 01:20:54,367
>> SPEAKER 33: Allura, meta inti kiteb
prototip tiegħek, l-argument inti

1804
01:20:54,367 --> 01:20:56,550
kieku jismu kien jissejjaħ howMany?

1805
01:20:56,550 --> 01:20:57,540
Iżda, below--

1806
01:20:57,540 --> 01:20:57,640
>> BRIAN SCASSELLATI: Oh yeah.

1807
01:20:57,640 --> 01:20:59,140
>> SPEAKER 33: --called xi ħaġa
differenti, ma nifhimx.

1808
01:20:59,140 --> 01:21:00,240
>> BRIAN SCASSELLATI: Għaliex
dawn huma differenti.

1809
01:21:00,240 --> 01:21:01,780
Allura li l-kwistjoni kbira.

1810
01:21:01,780 --> 01:21:08,250
Għalhekk il-kwistjoni kienet, sa
hawn, I kiteb howMany,

1811
01:21:08,250 --> 01:21:12,380
u 'l isfel hawn taħt, I kiteb howManyDots.

1812
01:21:12,380 --> 01:21:15,590
>> Ir-raġuni hija li fil prototip tiegħek,
huwa fil-fatt ma tingħata attenzjoni

1813
01:21:15,590 --> 01:21:17,090
għal ismijiet li int tqegħid fil.

1814
01:21:17,090 --> 01:21:20,530
Kollha li verament cares dwar
hija li huwa integer.

1815
01:21:20,530 --> 01:21:23,080
Hija trid tkun taf l-formola
ta 'dak li qed tqegħid fil.

1816
01:21:23,080 --> 01:21:31,560
>> Issa stylistically-- oops-- dak I għandhom
do, huwa I simili li jagħmlu dawn jaqblu.

1817
01:21:31,560 --> 01:21:33,150
KOLLOX SEW.

1818
01:21:33,150 --> 01:21:36,430
Minħabba li ser tkun jżommha
aktar faċli għalija li wieħed jiftakru.

1819
01:21:36,430 --> 01:21:38,390
Iżda dan kien żball tiegħi Yeah.

1820
01:21:38,390 --> 01:21:47,620
>> SPEAKER 34: U dan għall-
prototip li jaħdmu, biss

1821
01:21:47,620 --> 01:21:50,510
miktub li linja,
kitba l prototip,

1822
01:21:50,510 --> 01:21:53,932
tippermetti li l-funzjoni li jiġi
dritt taħtha biex tmur fil-aħħar

1823
01:21:53,932 --> 01:21:55,140
u jerġgħu jieħdu lura dak li tfisser?

1824
01:21:55,140 --> 01:21:58,480
>> BRIAN SCASSELLATI: Li jfisser
huwa meta l-kumpilatur tmur permezz,

1825
01:21:58,480 --> 01:22:01,930
din tmur mill-quċċata tal
kodiċi tiegħek mal-qiegħ.

1826
01:22:01,930 --> 01:22:05,430
U dak li dan prototip hu,
huwa bażikament wegħda.

1827
01:22:05,430 --> 01:22:09,570
>> Hija tgħid, hemm għaddej li jkun
funzjoni definita x'imkien.

1828
01:22:09,570 --> 01:22:11,880
Huwa ser tkun imsejħa printDots.

1829
01:22:11,880 --> 01:22:15,110
U li għaddej biex tieħu argument wieħed
li għaddej biex tkun numru sħiħ

1830
01:22:15,110 --> 01:22:18,590
u li għaddej biex jirritorna
xejn, tip null.

1831
01:22:18,590 --> 01:22:19,310
KOLLOX SEW.

1832
01:22:19,310 --> 01:22:22,950
I wegħda inti li għaddej biex tkun
definiti x'imkien fl-triq.

1833
01:22:22,950 --> 01:22:25,590
Iżda kwalunkwe ħin li inti tara
li, kif inti jinżlu

1834
01:22:25,590 --> 01:22:28,710
permezz tal-bqija tal tiegħi
funzjoni prinċipali, nixtieq

1835
01:22:28,710 --> 01:22:33,800
inti biex jikkura li bħala funzjoni
li jieħu input numru sħiħ wieħed.

1836
01:22:33,800 --> 01:22:37,970
>> U hekk meta l-kumpilatur jinżel
permezz ta 'dan, jara li jippromettu.

1837
01:22:37,970 --> 01:22:40,220
U meta jiġrilha l isfel,
jżomm għaddejjin, iżomm għaddej,

1838
01:22:40,220 --> 01:22:43,060
issib l-ewwel darba
printDots huwa msemmi.

1839
01:22:43,060 --> 01:22:46,910
U jgħid, Oh, int tagħti
me dan j. j s integer.

1840
01:22:46,910 --> 01:22:49,570
>> Well inti wiegħed lili li
jkun integer u li d-dritt.

1841
01:22:49,570 --> 01:22:51,370
Li OK.

1842
01:22:51,370 --> 01:22:53,880
U mbagħad finalment, down
fil-qiegħ nett,

1843
01:22:53,880 --> 01:22:58,340
qabel ma niġi sa l-aħħar ta 'tiegħi
fajl, I jagħmlu tajjeb il-wegħda tiegħi

1844
01:22:58,340 --> 01:22:59,896
u I jiddefinixxu dan.

1845
01:22:59,896 --> 01:23:01,868
KOLLOX SEW?

1846
01:23:01,868 --> 01:23:06,320
>> SPEAKER 35: Għalhekk, saves-- il
programm se jiffrankaw spazji vojta

1847
01:23:06,320 --> 01:23:09,570
li din tmur lura u jimla fl-aħħar?

1848
01:23:09,570 --> 01:23:12,140
>> BRIAN SCASSELLATI: Mhuwiex
dwar l-allokazzjoni memorja.

1849
01:23:12,140 --> 01:23:16,800
Huwa fil-fatt biss dwar dak
tip huma inti jistennew biex tara.

1850
01:23:16,800 --> 01:23:19,340
Jekk dan ħaġa jkollhom waħda
argument, jew ħames argumenti?

1851
01:23:19,340 --> 01:23:23,590
Għandu jkollhom it interi jkun
mogħti lilha, jew kordi?

1852
01:23:23,590 --> 01:23:25,780
Li kollox huwa tfittex
tagħmel huwa li jiċċekkja,

1853
01:23:25,780 --> 01:23:29,303
huma inti tagħti me l-
tip ġust ta 'argument.

1854
01:23:29,303 --> 01:23:31,560
KOLLOX SEW?

1855
01:23:31,560 --> 01:23:32,300
Kull dritt.

1856
01:23:32,300 --> 01:23:38,570
>> Let me tħallik ma
bit waħda oħra li tħares lejn.

1857
01:23:38,570 --> 01:23:44,850
Art ASCII mhuwiex il-mudell kbir
ta 'animazzjoni kif inhi llum.

1858
01:23:44,850 --> 01:23:50,850
Imma xi nies ta 'kors jieħdu l-affarijiet
u huma timbotta għall-estremitajiet tagħhom.

1859
01:23:50,850 --> 01:23:56,790
>> Dan huwa, bħala David wera
fi lecture, biċċa tal-kodiċi

1860
01:23:56,790 --> 01:24:02,150
li inti fl-ebda ċirkustanza
jippruvaw duplikat yourselves.

1861
01:24:02,150 --> 01:24:05,260
Minħabba li huwa terribbli stylistically.

1862
01:24:05,260 --> 01:24:11,180
Fil-fatt, hija mfassla biex tkun
diffiċli kemm jista 'jkun biex jinqara.

1863
01:24:11,180 --> 01:24:11,680
KOLLOX SEW.

1864
01:24:11,680 --> 01:24:16,210
>> Allura, biex jagħmlu mill-ġdid, ejja zoom hawn.

1865
01:24:16,210 --> 01:24:20,120
Jien se jmorru issa, direttorju bidla.

1866
01:24:20,120 --> 01:24:24,050
Jien ser jitla 'wieħed
livell, lura għall workspace tiegħi.

1867
01:24:24,050 --> 01:24:29,760
I ser mbagħad bidla direttorju fis dan
direttorju oħra li stajt maħluqa.

1868
01:24:29,760 --> 01:24:36,190
>> U dan huwa l-International
Obfuscated Programmazzjoni C Contest.

1869
01:24:36,190 --> 01:24:40,650
Mezzi obfuscated bħala hard
kemm jista 'jkun biex jifhmu.

1870
01:24:40,650 --> 01:24:44,150
Allura jekk jogħġbok, ma jkun jibża jekk inti tħares
f'dan u jmorru, I ma tista 'taqra dan.

1871
01:24:44,150 --> 01:24:46,350
Dik hija l-punt ta 'dan.

1872
01:24:46,350 --> 01:24:47,700
KOLLOX SEW?

1873
01:24:47,700 --> 01:24:52,770
>> Iżda, aħna għandna dan
programm isbaħ li jien

1874
01:24:52,770 --> 01:24:57,180
ser tħares lejn bi ftit ittajpjar aktar.

1875
01:24:57,180 --> 01:25:01,890
U ejja ara jekk I tista 'zoom out
biss daqsxejn, sabiex inti tista 'tara

1876
01:25:01,890 --> 01:25:03,940
>> U dan huwa l-programm.

1877
01:25:03,940 --> 01:25:08,080
Huwa msemmi endo.c.

1878
01:25:08,080 --> 01:25:14,850
U jidher qisu dan barmil ma '
tip ta 'l-ittri F-L-U-I-D fiha.

1879
01:25:14,850 --> 01:25:16,440
>> Dan huwa attwalment program.

1880
01:25:16,440 --> 01:25:20,260
Huwa bil-miktub fil-aktar joskuraw
mod li l-awturi tista 'possibilment

1881
01:25:20,260 --> 01:25:21,760
tiktibha.

1882
01:25:21,760 --> 01:25:29,210
Imma hija biċċa ftit isbaħ li
jiġġenera mudell ta 'dinamika ta' fluwidu.

1883
01:25:29,210 --> 01:25:34,870
>> U hekk aħna qed tmur biex jagħtu
li mudell input li

1884
01:25:34,870 --> 01:25:42,520
tidher bħal dan, ta '
staired sett ta 'kontenituri

1885
01:25:42,520 --> 01:25:45,820
ma 'xi fluwidu, xi
likwidu, fil-quċċata.

1886
01:25:45,820 --> 01:25:48,790
U aħna ser ikollhom it jissimulaw
dak li qed jiġri lilu.

1887
01:25:48,790 --> 01:25:52,415
>> So I ser sejħa dik il-funzjoni, endo.

1888
01:25:52,415 --> 01:25:59,000
U jien ser tagħtiha l
input fajl li I kellna.

1889
01:25:59,000 --> 01:26:02,830
U hemm epitome tagħna ta 'arti ASCII.

1890
01:26:02,830 --> 01:26:08,960
A simulatur full dinamiku fluwidu
tmexxija fi ftit linji ta 'kodiċi.

1891
01:26:08,960 --> 01:26:13,750
>> Issa x'hemm attwalment verament
aqwa dwar dan il-programm ftit

1892
01:26:13,750 --> 01:26:17,280
huwa li nixtieq li jitwaqqaf issa,
hekk jien ser tuża dak kmand?

1893
01:26:17,280 --> 01:26:18,660
>> UDJENZA: Kontroll-C.

1894
01:26:18,660 --> 01:26:20,390
>> BRIAN SCASSELLATI: Kontroll-C. KOLLOX SEW.

1895
01:26:20,390 --> 01:26:22,960
So I ser tuża Control-C.
C Li ser jitwaqqaf.

1896
01:26:22,960 --> 01:26:25,330
I ser ċar mill-ġdid.

1897
01:26:25,330 --> 01:26:31,210
U issa jien ser tinvoka l-
programm, teżegwixxi l-programm,

1898
01:26:31,210 --> 01:26:33,740
użu ruħu bħala input.

1899
01:26:33,740 --> 01:26:36,760

1900
01:26:36,760 --> 01:26:42,700
>> U aħna ser tara l-dinamika fluwidu
simulazzjoni ta 'dan tidwib.

1901
01:26:42,700 --> 01:26:43,830
KOLLOX SEW.

1902
01:26:43,830 --> 01:26:48,180
Jekk jogħġbok ma let li programm
jkun il-ħaġa li ma tfixkilx inti.

1903
01:26:48,180 --> 01:26:52,220
Huwa biss hekk li nistgħu jispiċċaw fuq
xi ħaġa jibred u interessanti.

1904
01:26:52,220 --> 01:26:53,930
KOLLOX SEW.

1905
01:26:53,930 --> 01:26:56,330
>> Aħjar ta 'xortih ma' settijiet problema tiegħek.

1906
01:26:56,330 --> 01:26:59,030
Aħna ser jkunu kuntenti li tirrispondi
mistoqsijiet wara klassi.

1907
01:26:59,030 --> 01:27:01,180
Grazzi ħafna, guys.

1908
01:27:01,180 --> 01:27:02,793