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00:00:07,170 --> 00:00:09,100
>> LUCAS FREITAS: OK, I raden
issa aħna qed jgħixu.

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00:00:09,100 --> 00:00:11,220
Merħba għall CS50 Supersection.

4
00:00:11,220 --> 00:00:12,880
Aħna Inqas Comfortable.

5
00:00:12,880 --> 00:00:13,870
Jisimni Lucas Freitas.

6
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Jien wieħed CS50 Kap TFS.

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00:00:16,230 --> 00:00:17,523
Dan huwa Lauren.

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00:00:17,523 --> 00:00:19,002
>> Lauren CARVALHO: Hi, jien Lauren.

9
00:00:19,002 --> 00:00:21,330
Jien ukoll TF Kap għas CS50.

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>> LUCAS FREITAS: Illum aħna qed biss jmorru
li jagħti ħarsa ġenerali ta 'dak kollu li għandek

11
00:00:24,730 --> 00:00:28,440
guys tgħallmu fil-ġimgħa, nisperaw
nagħtikom guys tajba

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sens li dak li inti għandek tkun taf
għal problema sett wieħed.

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>> Avviżi Just koppja.

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L-ewwelnett, ħinijiet tal-uffiċċju.

15
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Ħinijiet tal-uffiċċju qed jiġri mit-Tnejn
sal-Ħamis fi djar differenti

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Annenberg kull jum.

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Huma qed riżorsa tajba ħafna għalik
guys li ġejjin u jistaqsu mistoqsijiet, u

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kellem lit-TFS, u anki l-iskambju
ideat ma 'studenti oħra.

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Sabiex ikun żgur li jużaw dik ir-riżorsa
favur tiegħek.

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>> It-tieni ħaġa hija l-
CS50 Appliance.

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Għall-aħħar [inaudible]

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inti guys ma kellhomx fil-fatt
jkollhom appliance.

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Inti biss ma kollox fil-
kompjuter personali tiegħek.

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Iżda għal din il-problema, inti fil-fatt ikollhom
li jkollhom magna virtwali, sabiex tkun

25
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żgur li tniżżel il-CS50
Appliance u din tintrama.

26
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>> U t-tielet ħaġa hija kun żgur li
tibda l-problema stabbilita ASAP biss

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għaliex dan huwa ħafna aktar faċli biex issib
jgħinu meta int fil-

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bidu tal-ġimgħa.

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Għaliex in-nies għandhom tendenza li jistenna sakemm il-
tieni aħħar jibdew is-sett problema,

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u mbagħad inti tmur ħinijiet tal-uffiċċju,
u hemm ħafna nies.

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Fejn jekk inti tmur fuq it-tnejn, int ser
biex tara li inti tista 'tkellem lit-TFS

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pretty ħafna għall-lejl kollu,
u dawn qed tmur ikunu aktar minn

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kuntenti li jgħinuk.

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>> Lauren CARVALHO: Nista biss tieqaf
inti għal ftit tieni waħda?

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Has kulħadd kien kapaċi li jniżżlu
il Appliance CS50?

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Have nies ppruvaw?

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>> LUCAS FREITAS: Biex tniżżel, mill-
mod, tista 'tikseb l-istruzzjonijiet fuq

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cs50.net/appliance.

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>> Lauren CARVALHO: Dritt.

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U ma tieħu ftit filwaqt li għall tagħna
admins Sys biex ikollok liċenzja

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ewlenin, sabiex jiffirmaw għall-
proċess liberu ewwel.

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B'dak il-mod inti ser ikollok dan għal 30 jum,
u mbagħad stenna għal liċenzja ewlenin tiegħek

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li għandha tagħtiha
lilek għal sena.

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>> LUCAS FREITAS: L-ewwelnett,
ejja nitkellmu ftit

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dwar il Appliance CS50.

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Il Appliance CS50 huwa attwalment virtwali
magna li int ser

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run fil-kompjuter tiegħek stess li hija
bażikament running kompjuter ieħor

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ġewwa kompjuter tiegħek.

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Li huwa pjuttost jibred.

50
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U fil-fatt huwa użat kullimkien.

51
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Nies li biex tech taf li
dan huwa użat il-ħin kollu.

52
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inti?

53
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Jista 'jkollhom kompjuters multipli
fi strument wieħed.

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>> Ejja attwalment tagħti ħarsa
fil-Appliance.

55
00:02:27,760 --> 00:02:32,680

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Meta inti tmur għall-Appliance wara
tirreġistra, int se jkollhom

57
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tpoġġi ismek u l-log in to Harvard
hekk aħna jistgħu jiksbu inti kollha rreġistrati.

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Inti ser tara bażikament biss
wallpaper, u mbagħad Home u Trash,

59
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u allura dawn ikoni ftit.

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Dan tliet ikoni huma attwalment l-aktar
affarijiet importanti li inti jista 'jkollhom fil-

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Appliance tiegħek.

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>> L-ewwel waħda hija gedit, li huwa test
editur, bħad Notepad jew simili

63
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kwalunkwe tip ta 'test editur.

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Huwa biss xi ħaġa li nużaw biex jiktbu
kodiċi u mbagħad tagħmel Jittieħed magħha.

65
00:03:09,750 --> 00:03:11,770
>> It-tieni ħaġa li aħna
hawnhekk hija Chrome.

66
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Mela jekk għandek bżonn tuża l-internet
fil-Appliance, li l-

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dak li inti tista 'tuża.

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>> U t-tielet ħaġa hija l-terminal,
li huwa attwalment ħelwin ħafna.

69
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Nies normalment huma tip ta jibża ta '
il terminal għaliex dan huwa dan ħafna

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applikazzjoni qadima fejn inti
biss bażikament tip kollox ma

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tastiera tiegħek.

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Ma jkunx hemm ħafna ta 'interazzjoni
bil-maws.

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Iżda fil-fatt l-terminal
ma affarijiet tajba ħafna.

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>> L-ewwelnett, ejja biss jgħaddu
xi kmandi li inti

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00:03:43,990 --> 00:03:48,765
jistgħu jużaw fit-terminal.

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>> Lauren CARVALHO: U li tħossok liberu li tieqaf
us jekk għandek xi mistoqsijiet.

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>> LUCAS FREITAS: Yeah.

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Allura l-ewwel kmand li għandna
għall-terminal huwa ls.

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ls bażikament ifisser lista kollox, kollha
l-fajls u d-diretturi kollha,

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li għandi fil-post li I am.

81
00:04:09,540 --> 00:04:15,200
Hekk jekk I do ls hawn, jien ser tara
li għandi xi direttorji.

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Għandi l-desktop, l-downloads,
-zkuk, u l-VHOSTs.

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Dawk huma blu għaliex
huma kollha direttorji.

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>> Imbagħad għandek xi fajls oħra.

85
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Inti għandek bħal bonjour u hello.c, li
huma biss fajls, u dawn qed

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kuluri differenti.

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Allura dan huwa kmand importanti ħafna biss
tista 'tara liema huma l-fajls

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u direttorji li inti għandek
fid-direttorju li

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int fuq fil-terminal.

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Meta tara jharvard @ appliance u
allura s-simbolu ftit hemm, il-

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tilde, li sempliċiment ifisser li dak l-
direttorju li inti fil-mument.

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>> Lauren CARVALHO: Allura ittajpjar ls hija kważi
bħall tikklikkja fuq il-folder

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li huwa elenkat hemm dritt, fil juri li
inti kollha tal-kontenut li huma

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f'dak folder.

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>> UDJENZA: Hemm test
wara l hello.c?

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>> Lauren CARVALHO: Oh, inti ma tistax
tara li, għaliex dan huwa blu.

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>> LUCAS FREITAS: Hija tgħid
zkuk u VHOSTs.

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>> Lauren CARVALHO: Dawk huma
biss folders oħra.

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Jien sorry, huwa verament diffiċli li wieħed jara.

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00:05:16,890 --> 00:05:19,090
Forsi jekk aħna mitfija l-dwal?

101
00:05:19,090 --> 00:05:23,002
Colton, do inti tixtieq li jippruvaw u
isibu l-switch tad-dawl?

102
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Jiddispjacini dwar dan.

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I ma jaħsbu dwar dan.

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>> LUCAS FREITAS: Imma hija bażikament -

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yeah, jekk inti tista '-

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00:05:30,310 --> 00:05:32,278
>> Lauren CARVALHO: Zoom fil-iskrin tiegħek.

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>> LUCAS FREITAS: I ma
jkollhom dik il-karatteristika.

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>> Lauren CARVALHO: [inaudible].

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00:05:35,988 --> 00:05:39,528

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OK.

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Ukoll, hemm biss ħafna naturali
dawl f'din il-kamra ukoll.

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>> LUCAS FREITAS: Ejja biss wieħed jassumi li
hemm żewġ direttorji oħra hemmhekk.

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>> Lauren CARVALHO: Just jkollhom magħna.

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Din hija l-unika parti li tkun taf
tkun tħares fit-terminal.

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>> LUCAS FREITAS: Il-kmand li jmiss huwa
bażikament forsi inti tixtieq li torganizza

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fajls tiegħek -

117
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per eżempju, fajls kollha Ċ tiegħek fil waħda
direttorju-imma inti ma jkollhom

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direttorju biss għall C fajls għadu.

119
00:06:07,180 --> 00:06:11,590
Tista 'bażikament toħloq direttorju
tuża l-terminal kif ukoll, li hija

120
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l-istess ħaġa bħat tagħfas
u qal New Folder.

121
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Il-kmand huwa jagħmel direttorju, li
huwa mkdir, hekk bażikament "jagħmlu" u

122
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"Direttorju."

123
00:06:21,260 --> 00:06:22,680
>> U allura inti tista 'tpoġġi l-
isem tad-direttorju.

124
00:06:22,680 --> 00:06:32,490
Ejja ngħidu li jien ridt li jiġu msejħa,
I do not know, ejja ngħidu pset1 Jsir

125
00:06:32,490 --> 00:06:33,900
dan, I biss ħolqot direttorju.

126
00:06:33,900 --> 00:06:35,910
Ejja biss jiċċekkjaw li huwa hemm.

127
00:06:35,910 --> 00:06:40,870
Hekk jekk I do ls, issa nara zkuk, u
imbagħad pset1, u mbagħad VHOSTs.

128
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So I jkollhom l-direttorju ġdida hemmhekk.

129
00:06:44,360 --> 00:06:46,670
>> U mbagħad wara ikollok direttorju ġdid,
forsi inti tixtieq li jinnavigaw

130
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fis dan, hekk l-kmand li jmiss dan cd,
li biss bażikament ifisser jmorru lil

131
00:06:51,760 --> 00:06:53,400
direttorju speċifiku.

132
00:06:53,400 --> 00:06:58,377
Mela jekk jien tixtieq tmur pset1,
I tista 'biss tagħmel pset1 cd.

133
00:06:58,377 --> 00:07:01,550
>> Lauren CARVALHO: cd stands għall-bidla
direttorju, [inaudible] jistgħu

134
00:07:01,550 --> 00:07:02,230
ftakar li.

135
00:07:02,230 --> 00:07:05,460
>> LUCAS FREITAS: U issa tara li
minflok sempliċiment li jharvard

136
00:07:05,460 --> 00:07:09,150
appliance, jien jharvard appliance,
u mbagħad pset1, għaliex dan huwa juru

137
00:07:09,150 --> 00:07:14,150
me fejn I am fil dan il-kompjuter.

138
00:07:14,150 --> 00:07:17,510
>> Issa jekk Irrid immur lura għall-
direttorju li kien qabel dan wieħed, I

139
00:07:17,510 --> 00:07:22,950
jistgħu jagħmlu cd dot dot, li ifisser biss jmorru
għall-direttorju li I kien qabel,

140
00:07:22,950 --> 00:07:26,290
bħall-ġenitur ta 'dan
direttorju, bażikament.

141
00:07:26,290 --> 00:07:30,460
U issa nara li jien
lura għall jharvard.

142
00:07:30,460 --> 00:07:36,050
>> Il-ħaġa li jmiss li I tista 'tagħmel dan
huwa rm, li hu li jitneħħew fajl.

143
00:07:36,050 --> 00:07:39,590
Per eżempju, ejja ewwel tagħmel ls
biex tara dak li għandi hawnhekk.

144
00:07:39,590 --> 00:07:41,790
I jkollhom bonjour u hello.c.

145
00:07:41,790 --> 00:07:43,780
Ejja ngħidu li nixtieq li jitneħħew.

146
00:07:43,780 --> 00:07:48,280
I tista 'tagħmel bonjour rm.

147
00:07:48,280 --> 00:07:52,770
Huwa se ngħid "tneħħi fajl regolari
bonjour? "U jien ngħid" iva. "U issa jekk I

148
00:07:52,770 --> 00:07:56,410
do ls, nara li huwa
jkunux hemm aktar.

149
00:07:56,410 --> 00:07:59,700
>> Jekk I jippruvaw jużaw rm għal direttorju,
għalkemm, mhuwiex ser

150
00:07:59,700 --> 00:08:00,800
let inti tagħmel xejn.

151
00:08:00,800 --> 00:08:02,960
Huwa ser ngħid, ħej, inti
ma tistax tneħħi direttorju.

152
00:08:02,960 --> 00:08:08,100
Allura aħna għandna toħroġ din l-oħra msejħa rmdir,
li biss bażikament ifisser

153
00:08:08,100 --> 00:08:09,800
neħħi direttorju.

154
00:08:09,800 --> 00:08:12,842
I tista ', per eżempju, neħħi pset1.

155
00:08:12,842 --> 00:08:15,770
U jekk I do ls, I ma
għandhom dan jibqgħalu.

156
00:08:15,770 --> 00:08:18,430
>> Xi mistoqsijiet dwar dan?

157
00:08:18,430 --> 00:08:20,200
Nru?

158
00:08:20,200 --> 00:08:20,595
Yeah?

159
00:08:20,595 --> 00:08:23,954
>> UDJENZA: Huwa importanti li titlaq
kull meta inti - spazju wara

160
00:08:23,954 --> 00:08:26,540
tibda ittajpjar xi ħaġa?

161
00:08:26,540 --> 00:08:26,830
>> LUCAS FREITAS: Yeah.

162
00:08:26,830 --> 00:08:32,080
Jekk I do simili cd u l-direttorju,
I jkollhom jitqiegħdu spazju.

163
00:08:32,080 --> 00:08:33,350
Dak l-ispazju huma inti titkellem dwarhom?

164
00:08:33,350 --> 00:08:34,979
>> Lauren CARVALHO: L-ispazju bejn
cd u [inaudible].

165
00:08:34,979 --> 00:08:37,710
>> LUCAS FREITAS: Yeah, inti ser ikollok
tpoġġi l-ispazji minħabba cd hija l-

166
00:08:37,710 --> 00:08:42,770
kmand, u allura l-sekwenza li jmiss li
inti tip huwa bażikament l-direttorju.

167
00:08:42,770 --> 00:08:45,020
Allura huwa simili argument.

168
00:08:45,020 --> 00:08:45,360
Yeah?

169
00:08:45,360 --> 00:08:47,952
>> UDJENZA: Meta inti lista, dawk kollha
direttorji differenti, id-dritt?

170
00:08:47,952 --> 00:08:50,125
>> LUCAS FREITAS: Yeah, huma
huma fid-direttorju.

171
00:08:50,125 --> 00:08:53,524
>> UDJENZA: X'inhi d-differenzi
fost l-direttorji?

172
00:08:53,524 --> 00:08:55,390
>> LUCAS FREITAS: Huma qed biss
folders differenti.

173
00:08:55,390 --> 00:08:57,366
Directory huwa folder
fil-kompjuter tiegħek.

174
00:08:57,366 --> 00:08:58,120
>> UDJENZA: folder Open.

175
00:08:58,120 --> 00:09:00,140
>> LUCAS FREITAS: Yeah, huwa
biss folder miftuħa.

176
00:09:00,140 --> 00:09:03,400
>> Lauren CARVALHO: Matul hawn, dawk
li huma fil-blu huma attwali

177
00:09:03,400 --> 00:09:07,107
direttorji li tista 'tikseb fi u
mbagħad tara mazz ta 'affarijiet li huma

178
00:09:07,107 --> 00:09:10,248
f'dak li hija ħasra
għaliex inti ma tistax fil-fatt taqra l-

179
00:09:10,248 --> 00:09:11,290
dawk blu.

180
00:09:11,290 --> 00:09:16,166
U dawk fl-abjad huma biss fajls
li huma fi ħdan l-direttorju kurrenti.

181
00:09:16,166 --> 00:09:17,870
>> LUCAS Freitas: Allura direttorji
huma folders.

182
00:09:17,870 --> 00:09:18,810
L-oħrajn huma fajls.

183
00:09:18,810 --> 00:09:22,810
>> UDJENZA: X'inhu l-kmand
għal reset jew biex ċar dan?

184
00:09:22,810 --> 00:09:23,650
LUCAS FREITAS: Biex ċar?

185
00:09:23,650 --> 00:09:24,362
Lauren CARVALHO: Biex ċar?

186
00:09:24,362 --> 00:09:27,985
LUCAS FREITAS: Naħseb
huwa "ċar." Yeah.

187
00:09:27,985 --> 00:09:32,370
Allura inti biss tip ċara jekk
iskrin tiegħek wisq messy.

188
00:09:32,370 --> 00:09:33,700
Kwalunkwe mistoqsijiet oħra?

189
00:09:33,700 --> 00:09:36,720
U int se jitgħallmu mazz ta 'ieħor
jikkmanda biss naturalment matul il-

190
00:09:36,720 --> 00:09:38,405
semestru għaliex qed utli ħafna.

191
00:09:38,405 --> 00:09:42,380

192
00:09:42,380 --> 00:09:46,155
>> Allura issa ejja nitkellmu dwar kumpilazzjoni.

193
00:09:46,155 --> 00:09:51,510

194
00:09:51,510 --> 00:09:54,730
Tkellimna dwar pseudocode u
source code u object code.

195
00:09:54,730 --> 00:09:59,020
U hemm ħafna ta 'kodiċijiet, u forsi
inti guys huma konfużi dwar dan.

196
00:09:59,020 --> 00:10:02,190
Ejja nitkellmu ftit dwar dak
jiġri meta int bil-miktub ta 'programm,

197
00:10:02,190 --> 00:10:06,620
u inti josservawha, u dan isir
eżekutibbli fajl.

198
00:10:06,620 --> 00:10:10,190
Dawk huma kollha kliem li inti guys
probabbilment jinstemgħu, u forsi int mhux

199
00:10:10,190 --> 00:10:12,130
verament ċert x'inhu għaddej.

200
00:10:12,130 --> 00:10:15,540
>> Ejja ngħidu, per eżempju, li nixtieq li
jikteb programm li tgħid "bonjour." Il-

201
00:10:15,540 --> 00:10:19,670
ewwel ħaġa li tiġi f'moħħna tiegħek hija
inti tip ta 'tipprova li jaħseb kemm int

202
00:10:19,670 --> 00:10:23,000
se tagħmel dan fil moħħok, u
int probabilment ħsieb bl-Ingliż jew

203
00:10:23,000 --> 00:10:25,550
xi lingwa oħra, bħal naturali
lingwa, probabbilment.

204
00:10:25,550 --> 00:10:28,770
U allura inti taħseb, ukoll, jekk irrid,
per eżempju, jikteb programm li

205
00:10:28,770 --> 00:10:32,630
jgħid "hello," I se tibda programm,
I se print hello, u mbagħad I se

206
00:10:32,630 --> 00:10:35,270
nieqaf-programm.

207
00:10:35,270 --> 00:10:36,350
Dan huwa pseudocode.

208
00:10:36,350 --> 00:10:41,740
Dan huwa biss bażikament inti qed tipprova
toħroġ ma 'sekwenza ta' avvenimenti

209
00:10:41,740 --> 00:10:46,510
li int ser tagħmel biex tkun
kapaċi li jikteb programm.

210
00:10:46,510 --> 00:10:49,610
>> Imbagħad għandek il-kodiċi sors, u
il-kodiċi tas-sors ma għandhom

211
00:10:49,610 --> 00:10:53,240
speċifikament tkun C. Aħna qed jitkellem
dwar kodiċi sors fl C minħabba li l-

212
00:10:53,240 --> 00:10:56,760
il-lingwa aħna qed jitgħallmu, imma ovvjament
kodiċi jista 'jkun pretty ħafna xi

213
00:10:56,760 --> 00:10:59,160
lingwa ta 'programmar li għandek.

214
00:10:59,160 --> 00:11:01,230
Aktar tard fil-semestru, int ser
jitgħallmu lingwi oħra.

215
00:11:01,230 --> 00:11:03,230
Li wkoll kodiċi sors.

216
00:11:03,230 --> 00:11:07,380
>> Per eżempju, hawnhekk, dan huwa sors tiegħi
kodiċi, u mbagħad jien inkluż

217
00:11:07,380 --> 00:11:10,170
librerija, u mbagħad nibda
prinċipali, u mbagħad I jistampaw.

218
00:11:10,170 --> 00:11:14,510
U Laura se nitkellmu ftit
ftit dwar dan kollu.

219
00:11:14,510 --> 00:11:16,190
Allura dan huwa l-kodiċi sors.

220
00:11:16,190 --> 00:11:19,590
>> U dak huwa l-kodiċi oġġett?

221
00:11:19,590 --> 00:11:22,500
L-oġġett huwa mazz ta 'żerijiet
u dawk, bażikament.

222
00:11:22,500 --> 00:11:27,680
Dak li jiġri huwa inti inizjalment jkollhom
pseudocode, li hija kollha bl-Ingliż.

223
00:11:27,680 --> 00:11:29,020
U I tfisser, inti tifhem dan.

224
00:11:29,020 --> 00:11:31,260
Probabbilment ħbieb tiegħek jifhmu
dan, u ħafna nies kieku

225
00:11:31,260 --> 00:11:32,560
jifhmu l-idea.

226
00:11:32,560 --> 00:11:36,770
Iżda kompjuters huma verament mutu, u dawn
ma jifhmu bl-Ingliż, sabiex inti

227
00:11:36,770 --> 00:11:41,320
jkunu tittraduċi li fis xi ħaġa,
jinqaleb normalment xi

228
00:11:41,320 --> 00:11:42,460
lingwa ta 'programmar.

229
00:11:42,460 --> 00:11:46,840
>> U inti tista 'taħseb ta' programmazzjoni
lingwa tip simili ta 'lingwa

230
00:11:46,840 --> 00:11:50,970
li inti tgħid kompjuter tiegħek kif
li jitkellmu u jifhmu.

231
00:11:50,970 --> 00:11:54,160
Inti bażikament miktub xi ħaġa
lingwa li tnejn inti u tiegħek

232
00:11:54,160 --> 00:11:55,190
kompjuter jifhmu.

233
00:11:55,190 --> 00:11:56,470
Dik hija l-kodiċi tas-sors.

234
00:11:56,470 --> 00:12:00,580
Allura jmorru formola pseudocode sors
kodiċi, huwa sa inti.

235
00:12:00,580 --> 00:12:03,130
Huwa bażikament inti tagħmel program tiegħek.

236
00:12:03,130 --> 00:12:06,740
>> Iżda l-problema hija li l-
kompjuter lanqas ma

237
00:12:06,740 --> 00:12:08,360
jifhmu lingwa ta 'programmar.

238
00:12:08,360 --> 00:12:10,320
Ma tifhimx
kodiċi ta 'sors fil-livelli kollha.

239
00:12:10,320 --> 00:12:12,520
Hija fil-fatt biss jifhem
żerijiet u dawk.

240
00:12:12,520 --> 00:12:16,570
Allura aħna għandna dan ħaġa magic ħafna msejħa
kompilatur, li bażikament hija

241
00:12:16,570 --> 00:12:19,755
se tikseb l-għajn imsejħa li inti
kiteb b'lingwa l-tnejn inti

242
00:12:19,755 --> 00:12:25,320
u l-kompjuter tiegħek jitkellmu, u issa int
ser jittrasformaw li

243
00:12:25,320 --> 00:12:26,270
żerijiet u dawk.

244
00:12:26,270 --> 00:12:30,860
Allura bażikament dak l-kumpilatur ma huwa
jiġrilha source code, f'dan il-każ C,

245
00:12:30,860 --> 00:12:34,100
huwa se jittrasformawha fi zeroes
u dawk li l-kompjuter

246
00:12:34,100 --> 00:12:37,440
jifhem u jista 'jagħmel
fajl eżekutibbli barra minnha.

247
00:12:37,440 --> 00:12:40,900
>> Does li jagħmel sens?

248
00:12:40,900 --> 00:12:45,300
Tista 'biss jaħsbu l-kompilatur bħala
xi tip ta 'traduttur li jkun

249
00:12:45,300 --> 00:12:50,280
inti tgħin tispjega lill-kompjuter
eżattament dak li suppost tagħmel.

250
00:12:50,280 --> 00:12:52,310
>> Imma kif nista jikkompilaw.

251
00:12:52,310 --> 00:12:59,680
Ejja ħa mmorru lura għall-Appliance, u
ejja ngħidu li jien tagħmel dak il-programm.

252
00:12:59,680 --> 00:13:04,220
Ewwel Jien ser toħloq direttorju
hawn, u jien ser sejħa hija

253
00:13:04,220 --> 00:13:11,130
"Prattika." Issa jien ser jinnaviga
għall-direttorju, hekk prattika cd.

254
00:13:11,130 --> 00:13:13,210
Issa jien prattika ġewwa.

255
00:13:13,210 --> 00:13:16,860
>> Issa nixtieq li jibdew gedit,
hekk kif nista 'nagħmlu?

256
00:13:16,860 --> 00:13:21,920
I tista 'jew ikklikkja hawn, jew I tista' sempliċement
litteralment tip "gedit," u li għaddej

257
00:13:21,920 --> 00:13:24,290
biex tiftaħ għalija.

258
00:13:24,290 --> 00:13:28,100
>> Issa jien ser tip program tiegħi, so
eżattament dak I kiteb fil-slide.

259
00:13:28,100 --> 00:13:30,360
Jien tiddikjara librerija.

260
00:13:30,360 --> 00:13:35,440
Jien tagħmel int prinċipali, bla effett.

261
00:13:35,440 --> 00:13:39,180
U issa jien tagħmel printf, bonjour.

262
00:13:39,180 --> 00:13:46,530

263
00:13:46,530 --> 00:13:50,170
Issa jien ser jiffrankaw dan.

264
00:13:50,170 --> 00:13:53,665
Let me jitqiegħdu fil-prattika, u
Jien ser sejħa dan hello.c.

265
00:13:53,665 --> 00:13:57,710

266
00:13:57,710 --> 00:13:59,590
Allura issa huwa salvati.

267
00:13:59,590 --> 00:14:03,250
>> Jekk irrid josservawha, I attwalment
tista 'tagħmel dan f'żewġ postijiet differenti.

268
00:14:03,250 --> 00:14:07,090
I tista 'jew tagħmel dan fil-tieqa terminal,
għalhekk dan wieħed kbir, jew inti tista '

269
00:14:07,090 --> 00:14:09,860
jużaw gedit li attwalment għandha
tieqa terminal dritt hawn.

270
00:14:09,860 --> 00:14:17,890
Allura inti tista konvenjenti ħafna 'biss tagħmel
kodiċi tiegħek, u allura inti tista 'sempliċement tip

271
00:14:17,890 --> 00:14:20,670
tkun xi tkun hawn, u jippruvaw josservawha.

272
00:14:20,670 --> 00:14:23,450
>> Allura kif nista jikkompilaw kodiċi?

273
00:14:23,450 --> 00:14:27,495
L-eħfef mod li għandna huwa bl-użu
jagħmel, li huwa funzjoni li

274
00:14:27,495 --> 00:14:29,590
hija bażikament se
jikkompilaw kodiċi tiegħek.

275
00:14:29,590 --> 00:14:34,170
Inti biss għandek tgħid jagħmlu hello, hekk
"Jagħmlu" u l-isem tal-programm.

276
00:14:34,170 --> 00:14:35,420
>> Oops.

277
00:14:35,420 --> 00:14:38,250

278
00:14:38,250 --> 00:14:39,280
Din hija waħda skomda.

279
00:14:39,280 --> 00:14:41,738
>> Lauren CARVALHO: Tista [inaudible]?

280
00:14:41,738 --> 00:14:45,182

281
00:14:45,182 --> 00:14:45,990
>> LUCAS FREITAS: Jiddispjacini.

282
00:14:45,990 --> 00:14:49,960
I ma ħlief fil-
direttorju dritt.

283
00:14:49,960 --> 00:14:52,130
Come għall-prattika, u issa
ħlief bħala hello.c.

284
00:14:52,130 --> 00:14:54,750
Jien sorry.

285
00:14:54,750 --> 00:14:56,250
Issa huwa ffrankati.

286
00:14:56,250 --> 00:14:58,300
>> Let me biss tagħmel ls u tkun
ċert li huwa hawnhekk.

287
00:14:58,300 --> 00:14:59,460
OK, issa huwa hawnhekk.

288
00:14:59,460 --> 00:15:05,930
Mela issa jekk I ma tagħmel hello, dan spits a
lott ta 'għalf, iżda mbagħad biss tagħti

289
00:15:05,930 --> 00:15:08,870
me linja oħra għall-terminal, li
ifisser li kien suċċess.

290
00:15:08,870 --> 00:15:13,160
Mela issa jekk I do ls darb'oħra, I attwalment
tara dan il-fajl fl-aħdar, li hija l-

291
00:15:13,160 --> 00:15:15,470
fajl eżekutibbli.

292
00:15:15,470 --> 00:15:21,700
>> U mbagħad jekk irrid run, dak kollu li
I għandek tagħmel huwa dot slash bonjour.

293
00:15:21,700 --> 00:15:25,830
Huwa ser jgħidu bonjour dritt hawn, so
huwa eżattament dak li jien tistaqsi lill.

294
00:15:25,830 --> 00:15:29,620
>> Hemm aktar mod tal-kompilazzjoni,
li qed tuża clang.

295
00:15:29,620 --> 00:15:35,740
Clang huwa biss kompilatur li għandna,
u huwa ftit aktar verbose biex

296
00:15:35,740 --> 00:15:36,390
josservawha.

297
00:15:36,390 --> 00:15:40,180
Imma taħdem biss ukoll.

298
00:15:40,180 --> 00:15:46,810
Hekk jekk I do clang, u mbagħad-o, u mbagħad
l-isem li nixtieq li tagħti lil

299
00:15:46,810 --> 00:15:50,400
l-fajl eżekutibbli, hekk ejja ngħidu
"Bonjour." U allura l-fajl li nixtieq

300
00:15:50,400 --> 00:15:53,460
biex jikkompila, hello.c.

301
00:15:53,460 --> 00:15:55,900
Huwa wkoll ser tiġbor.

302
00:15:55,900 --> 00:15:59,020
U inti għandek l-fajl hawn, u
I tista 'biss jiġi esegwit ukoll.

303
00:15:59,020 --> 00:16:00,610
Allura kemm minnhom jaħdmu.

304
00:16:00,610 --> 00:16:03,270
>> Does li jagħmel sens?

305
00:16:03,270 --> 00:16:06,020
Kwalunkwe mistoqsijiet?

306
00:16:06,020 --> 00:16:09,020
>> UDJENZA: Tista zoom
fi ftit?

307
00:16:09,020 --> 00:16:09,913
>> LUCAS FREITAS: Jiddispjacini?

308
00:16:09,913 --> 00:16:11,135
>> UDJENZA: Zoom fil-?

309
00:16:11,135 --> 00:16:13,310
>> Lauren CARVALHO: Naħseb li inti
tista 'biss kmand plus.

310
00:16:13,310 --> 00:16:14,295
>> LUCAS FREITAS: Kmand liema?

311
00:16:14,295 --> 00:16:16,060
>> Lauren CARVALHO: Kmand plus.

312
00:16:16,060 --> 00:16:17,000
>> LUCAS FREITAS: Le

313
00:16:17,000 --> 00:16:19,350
>> Lauren CARVALHO: Oh, li mhux
sejjer jaħdem minħabba -

314
00:16:19,350 --> 00:16:25,548
huwa għaliex aħna waqqafna r-riżoluzzjoni
għal dan il-ħaġa.

315
00:16:25,548 --> 00:16:27,450
>> LUCAS FREITAS: I ma
naħsbu li nistgħu zoom pulzieri

316
00:16:27,450 --> 00:16:30,852

317
00:16:30,852 --> 00:16:34,130
Yeah, aħna ma tistax zoom.

318
00:16:34,130 --> 00:16:36,200
Għandek mistoqsija oħra?

319
00:16:36,200 --> 00:16:36,680
Jiddispjacini.

320
00:16:36,680 --> 00:16:39,170
>> UDJENZA: Tista jirrepetu clang?

321
00:16:39,170 --> 00:16:40,630
>> LUCAS FREITAS: Il clang?

322
00:16:40,630 --> 00:16:44,190
Clang huwa l-istess ħaġa bħat jagħmlu, iżda l-
differenza hija li l-ewwel jien ser

323
00:16:44,190 --> 00:16:48,460
jiktbu clang, li hija l-kmand,
allura jien ser tagħmel -0, kollha, li hija

324
00:16:48,460 --> 00:16:51,680
biss dak li aħna qed tmur biex
jitgħallmu aktar tard bħala bandiera.

325
00:16:51,680 --> 00:16:54,440
Hekk biss jaħsbu li inti dejjem
għandek tpoġġi l-o.

326
00:16:54,440 --> 00:16:58,690
>> U allura l-ewwel, int se timplimenta
l-isem tal-fajl eżekutibbli,

327
00:16:58,690 --> 00:17:00,680
bażikament l-fajl li int
se toħloq.

328
00:17:00,680 --> 00:17:06,430
Allura nista 'ngħid, per eżempju, hello2 u
allura l-fajl li nixtieq li jikkompilaw,

329
00:17:06,430 --> 00:17:07,800
li hija l-fajl c..

330
00:17:07,800 --> 00:17:09,240
Allura dak hello.c.

331
00:17:09,240 --> 00:17:10,871
Does li jagħmel sens?

332
00:17:10,871 --> 00:17:12,635
>> UDJENZA: Hello liema?

333
00:17:12,635 --> 00:17:13,076
X'inhu dan?

334
00:17:13,076 --> 00:17:15,960
>> LUCAS FREITAS: Hello.c.

335
00:17:15,960 --> 00:17:19,849
U jekk I josservawha, u jekk
I do ls, Għandi wkoll

336
00:17:19,849 --> 00:17:22,010
hello2 li jien biss ikkumpilata.

337
00:17:22,010 --> 00:17:26,339
U jekk nipprova run, li għaddej biex
jagħmlu eżattament l-istess ħaġa bħat hello,

338
00:17:26,339 --> 00:17:27,089
biss print bonjour.

339
00:17:27,089 --> 00:17:31,660
>> UDJENZA: Kif come għall-għamla
inti tista 'tpoġġi hello.c wara?

340
00:17:31,660 --> 00:17:33,880
>> LUCAS FREITAS: Fl-għamla, inti
ma jkollu jpoġġi l. c.

341
00:17:33,880 --> 00:17:36,140
Li tagħmel, inti biss jgħidu l-
isem tal-programm.

342
00:17:36,140 --> 00:17:37,750
Inti ma jkollhom jgħidu. C.

343
00:17:37,750 --> 00:17:39,020
Iżda għal clang, għandek.

344
00:17:39,020 --> 00:17:44,040
>> UDJENZA: Bil clang do inti wkoll
ikollhom iżidu l-[inaudible]

345
00:17:44,040 --> 00:17:44,480
>> Lauren CARVALHO: Yeah.

346
00:17:44,480 --> 00:17:46,180
Allura inti ukoll għandek librerija.

347
00:17:46,180 --> 00:17:51,170
>> LUCAS FREITAS: Yeah, dan huwa xi ħaġa
aħna ser tuża aktar tard.

348
00:17:51,170 --> 00:17:54,850
Li sejjaħ jgħaqqdu, u naħseb li aħna qed
ser jitkellmu dwar dan aktar tard.

349
00:17:54,850 --> 00:17:55,930
Mistoqsija oħra?

350
00:17:55,930 --> 00:17:59,927
>> UDJENZA: Do inti tpoġġi
a clang dot slash?

351
00:17:59,927 --> 00:18:01,060
>> LUCAS FREITAS: Le

352
00:18:01,060 --> 00:18:06,040
Il dot slash huwa biss li tiftaħ
l-fajl eżekutibbli.

353
00:18:06,040 --> 00:18:09,440
Allura clang, inti biss jiktbu "clang," u
allura l-jekk inti tixtieq li tiftaħ il-

354
00:18:09,440 --> 00:18:12,640
eżekutibbli fajl li inti biss
kkompilata, allura inti dot

355
00:18:12,640 --> 00:18:13,780
slash u l-isem.

356
00:18:13,780 --> 00:18:15,100
Does li jagħmel sens?

357
00:18:15,100 --> 00:18:18,635

358
00:18:18,635 --> 00:18:22,435
>> UDJENZA: Jekk ġejt biex biss bidla
[Inaudible] li bonjour dinja, do you

359
00:18:22,435 --> 00:18:23,870
għandek recompile dan?

360
00:18:23,870 --> 00:18:24,750
>> LUCAS FREITAS: Yeah.

361
00:18:24,750 --> 00:18:36,650
jekk irrid ngħid, per eżempju, "bonjour
hemm, "I tista 'biss jiffrankaw issa, u I

362
00:18:36,650 --> 00:18:38,020
biss josservawha mill-ġdid.

363
00:18:38,020 --> 00:18:41,910
So let me do make bonjour.

364
00:18:41,910 --> 00:18:48,490
U jekk I do hello, li għaddej biex
jgħidu "bonjour hemm." Jagħmel sens?

365
00:18:48,490 --> 00:18:50,280
Kwalunkwe mistoqsijiet oħra?

366
00:18:50,280 --> 00:18:54,384
>> UDJENZA: Għandek biex tinkludi l-
I standard / O li tikkoordina x-xogħol?

367
00:18:54,384 --> 00:18:55,480
>> LUCAS FREITAS: Yeah.

368
00:18:55,480 --> 00:18:58,050
L-I / O standard hija bażikament
il-librerija li għandha

369
00:18:58,050 --> 00:19:00,050
implimentazzjoni għall printf.

370
00:19:00,050 --> 00:19:03,450

371
00:19:03,450 --> 00:19:06,910
Allura dak id-dritt ħaġa fuq il-
top jinkludi stdio.

372
00:19:06,910 --> 00:19:11,920
Li huwa inkluż librerija li
bażikament għandha mazz ta 'differenti

373
00:19:11,920 --> 00:19:13,260
għodod li tista 'tuża.

374
00:19:13,260 --> 00:19:13,480
wieħed?

375
00:19:13,480 --> 00:19:17,820
Minnhom huwa printf li hija funzjoni
li bażikament prints

376
00:19:17,820 --> 00:19:21,290
messaġġi lill-iskrin.

377
00:19:21,290 --> 00:19:23,200
>> Kwalunkwe mistoqsijiet oħra?

378
00:19:23,200 --> 00:19:24,700
Nru?

379
00:19:24,700 --> 00:19:25,060
OK.

380
00:19:25,060 --> 00:19:31,620
Allura issa ejja nitkellmu dwar -

381
00:19:31,620 --> 00:19:33,948
>> Lauren CARVALHO: Ejja biss
mur l-gwida tal-istil.

382
00:19:33,948 --> 00:19:35,896
Tixtieq li ssib biss fil hawn?

383
00:19:35,896 --> 00:19:37,880
>> LUCAS FREITAS: Allura aħna qed tmur
biex jitkellmu dwar l-istil.

384
00:19:37,880 --> 00:19:47,006

385
00:19:47,006 --> 00:19:50,430
>> Lauren CARVALHO: Oh, David
ma finitura.

386
00:19:50,430 --> 00:19:51,230
OK.

387
00:19:51,230 --> 00:19:53,870
Għaliex ma we terga 'lura għal
stil fl-aħħar nett?

388
00:19:53,870 --> 00:19:56,220
Huwa fil-fatt ġew aġġornati
kif nitkellmu.

389
00:19:56,220 --> 00:19:56,810
>> LUCAS FREITAS: Yeah.

390
00:19:56,810 --> 00:19:58,300
Let mod għall David biex jintemm dan.

391
00:19:58,300 --> 00:20:07,150

392
00:20:07,150 --> 00:20:08,600
>> Lauren CARVALHO: Jista
aħna jaqilbu attwalment?

393
00:20:08,600 --> 00:20:14,920

394
00:20:14,920 --> 00:20:17,200
>> So I hope kulħadd kien
jgawdu Scratch.

395
00:20:17,200 --> 00:20:21,950
Sfortunatament, huwa żmien li
jitbiegħdu minn dan -

396
00:20:21,950 --> 00:20:25,280
sfortunatament wasal iż-żmien li nimxu lil hinn
minn dawn il-blokok ta 'programmazzjoni pretty

397
00:20:25,280 --> 00:20:28,530
fuq C. Iżda fortunatament, kollha tal-
programmazzjoni constructs li inti ħadthom

398
00:20:28,530 --> 00:20:32,370
ilha taħdem magħhom Scratch huma
direttament jinqalibx għal C, u aħna

399
00:20:32,370 --> 00:20:35,130
ser tibda biex jitgħallmu dwar
xi wħud minnhom dritt issa.

400
00:20:35,130 --> 00:20:39,200
Ejja ewwel tkellem dwar kondizzjonijiet
espressjonijiet Boolean.

401
00:20:39,200 --> 00:20:41,944
>> Din tkun qed taħdem fuq riżerva
enerġija tal-batterija.

402
00:20:41,944 --> 00:20:43,912
>> LUCAS FREITAS: Kif huwa
li ma tkunx qed taħdem?

403
00:20:43,912 --> 00:20:47,850

404
00:20:47,850 --> 00:20:48,010
OK.

405
00:20:48,010 --> 00:20:50,256
Inti tmur hemm, jien ser tikseb l -

406
00:20:50,256 --> 00:20:53,700

407
00:20:53,700 --> 00:20:57,390
>> Lauren CARVALHO: So kundizzjonijiet huma
importanti għaliex jippermettu magħna biex

408
00:20:57,390 --> 00:21:00,588
tintroduċi loġika fil-programmi tagħna.

409
00:21:00,588 --> 00:21:04,620
Hawn eżempju ta 'kundizzjoni
fi ħdan programm C.

410
00:21:04,620 --> 00:21:06,130
Ejja nota kif dan -

411
00:21:06,130 --> 00:21:11,324
Allura dritt dan il-blokk kundizzjoni hawn, dan
dikjarazzjoni printf mhux se jwettqu

412
00:21:11,324 --> 00:21:14,860
sakemm il-kundizzjoni fil-
parentesi, n akbar minn 0,

413
00:21:14,860 --> 00:21:16,800
tevalwa li veru.

414
00:21:16,800 --> 00:21:20,780
>> Issa, il-kundizzjonijiet kollha fi ħdan f
dikjarazzjonijiet huma espressjonijiet Boolean,

415
00:21:20,780 --> 00:21:22,970
li jfisser li hemm
huma biss żewġ għażliet.

416
00:21:22,970 --> 00:21:26,856
Huma jistgħu jew jevalwa veru,
jew jistgħu jevalwaw biex falza.

417
00:21:26,856 --> 00:21:33,174
So here, sabiex dan jagħmel sens, id-dritt? n
akbar minn 0, ifisser li huwa pożittiv

418
00:21:33,174 --> 00:21:41,160
numru, li jfisser li se print
out "inti qabad numru pożittiv."

419
00:21:41,160 --> 00:21:44,630
>> Hemm lottijiet ta 'espressjonijiet Boolean
li jistgħu jiffurmaw il-kundizzjoni ma '

420
00:21:44,630 --> 00:21:47,190
dikjarazzjoni Iniz.

421
00:21:47,190 --> 00:21:48,520
Għandna l-anqas minn.

422
00:21:48,520 --> 00:21:50,950
Dan huwa inqas minn jew ugwali għal.

423
00:21:50,950 --> 00:21:52,200
Dan huwa biss umoristiċi [inaudible].

424
00:21:52,200 --> 00:21:54,800

425
00:21:54,800 --> 00:22:01,630
Jekk trid li l-printf li sseħħ jekk huwa
ikbar minn jew ugwali għal 0, allura

426
00:22:01,630 --> 00:22:03,345
inti tagħżel dan.

427
00:22:03,345 --> 00:22:07,750
Allura l-daqs eżatt tannetti dritt
wara li l-akbar minn sinjal.

428
00:22:07,750 --> 00:22:12,030
>> Daqs ugwali, li hija differenti minn
wieħed biss sinjal ugwali, ugwali ugwali

429
00:22:12,030 --> 00:22:16,430
effettivament tfisser li tkun xi tkun dwar il-
naħa tax-xellug ta 'dan huwa l-istess bħal

430
00:22:16,430 --> 00:22:20,610
x'hemm fuq il-lemin ta 'din
fejn wieħed sinjal ugwali huwa dak?

431
00:22:20,610 --> 00:22:23,333
X'inhu wieħed biss sinjal ugwali?

432
00:22:23,333 --> 00:22:24,275
Assenjament.

433
00:22:24,275 --> 00:22:25,985
>> LUCAS FREITAS: Min qal li?

434
00:22:25,985 --> 00:22:27,170
Huwa li kandju?

435
00:22:27,170 --> 00:22:27,370
Oh, no.

436
00:22:27,370 --> 00:22:27,885
Jiddispjacini.

437
00:22:27,885 --> 00:22:28,210
Jiddispjacini.

438
00:22:28,210 --> 00:22:30,400
Inti kemm tikseb kandju.

439
00:22:30,400 --> 00:22:31,510
Oh, OK!

440
00:22:31,510 --> 00:22:33,046
Tliet persuni jiksbu kandju!

441
00:22:33,046 --> 00:22:37,393
>> Lauren CARVALHO: Allura dan wieħed dritt hawn
huwa l-operatur bang 'qabel

442
00:22:37,393 --> 00:22:40,240
is-sinjal ugwali, b'tali mod li
mhux ugwali għal.

443
00:22:40,240 --> 00:22:46,560
Hekk jekk dan kien fi ħdan il-kundizzjoni tiegħi,
il-korp tal-kundizzjoni kieku

444
00:22:46,560 --> 00:22:49,615
tesegwixxi biss jekk tkun xi tkun fil-
ix-xellug mhuwiex l-istess bħal

445
00:22:49,615 --> 00:22:52,540
x'hemm fuq il-lemin.

446
00:22:52,540 --> 00:22:57,680
>> I jista 'wkoll ikollhom biss il-
punt exclamation.

447
00:22:57,680 --> 00:23:01,250
Attwalment aħna ser tara fil-karatteristika
slide kif dan għandu jkun użat.

448
00:23:01,250 --> 00:23:03,830
>> LUCAS FREITAS: Kwalunkwe mistoqsijiet?

449
00:23:03,830 --> 00:23:06,450
Nru?

450
00:23:06,450 --> 00:23:10,460
>> Lauren CARVALHO: Nistgħu jgħaqqdu dawn
Espressjonijiet Boolean biex jinbena aktar

451
00:23:10,460 --> 00:23:12,500
dikjarazzjonijiet kondizzjonali kkomplikata.

452
00:23:12,500 --> 00:23:19,680
Allura hawnhekk, jekk ikun x'ikun fuq ix-xellug
naħa tal-vireg doppji jew

453
00:23:19,680 --> 00:23:23,160
dak kollu li huwa fuq il-lemin ta '
l-bars doppja tevalwa li veru,

454
00:23:23,160 --> 00:23:25,700
allura aħna ser jistampa invalida.

455
00:23:25,700 --> 00:23:29,503
U mbagħad stabbiliti hawn, jekk tkun xi tkun l-
fuq in-naħa tax-xellug tat-tnejn

456
00:23:29,503 --> 00:23:33,480
ampersands u kwalunkwe dwar id-dritt
naħa taż-żewġ ampersands

457
00:23:33,480 --> 00:23:37,470
tevalwa li veru, imbagħad
aħna ser jistampa valida.

458
00:23:37,470 --> 00:23:42,195
Il-vireg doppju huma msejħa l-loġika
Jew l-operatur il-ampersands doppja huma

459
00:23:42,195 --> 00:23:44,190
imsejħa l-operatur loġiku.

460
00:23:44,190 --> 00:23:44,648
Iva?

461
00:23:44,648 --> 00:23:47,850
>> UDJENZA: Huma dawk biss
minuskuli l's?

462
00:23:47,850 --> 00:23:48,620
>> Lauren CARVALHO: Le

463
00:23:48,620 --> 00:23:50,890
Huma qed attwalment -

464
00:23:50,890 --> 00:23:55,134
inti taf l-backlash, bħal
hawn fuq ċavetta Ritorn tiegħek?

465
00:23:55,134 --> 00:23:56,585
Inti tara li?

466
00:23:56,585 --> 00:23:57,940
>> LUCAS FREITAS: Huwa fil-fatt bar.

467
00:23:57,940 --> 00:24:02,100
>> Lauren CARVALHO: Huwa fil-fatt
biss żewġ bars.

468
00:24:02,100 --> 00:24:05,724
>> UDJENZA: Tista 'tuża l-
ugwali ugwali għall-kordi?

469
00:24:05,724 --> 00:24:07,000
>> LUCAS FREITAS: Le

470
00:24:07,000 --> 00:24:09,130
Aħna ser jitgħallmu aktar tard
xi ħaġa dwar dan.

471
00:24:09,130 --> 00:24:10,735
>> Lauren CARVALHO: Hemm funzjoni
li tista 'tuża.

472
00:24:10,735 --> 00:24:12,644
Imma inti ma għandekx
jinkwetaw li għadha biss.

473
00:24:12,644 --> 00:24:15,530

474
00:24:15,530 --> 00:24:18,270
>> X'jiġri jekk I jagħtu dan il-programm
in-numru 5?

475
00:24:18,270 --> 00:24:20,850
Liema se print out?

476
00:24:20,850 --> 00:24:22,100
>> UDJENZA: [inaudible]

477
00:24:22,100 --> 00:24:27,780

478
00:24:27,780 --> 00:24:28,275
valida.

479
00:24:28,275 --> 00:24:29,770
>> Lauren CARVALHO: Validu?

480
00:24:29,770 --> 00:24:30,135
Yeah.

481
00:24:30,135 --> 00:24:34,092
I do not know li ltqajna dak.

482
00:24:34,092 --> 00:24:35,036
>> [Rires]

483
00:24:35,036 --> 00:24:37,990
>> Lauren CARVALHO: Dak it-tip
tal scary [inaudible].

484
00:24:37,990 --> 00:24:40,900
>> UDJENZA: Allura l-doppja u,
li biss mezzi u?

485
00:24:40,900 --> 00:24:41,740
>> Lauren CARVALHO: Yeah.

486
00:24:41,740 --> 00:24:46,160
Allura numru 5 huwa kemm akbar
minn 0 u inqas minn 100.

487
00:24:46,160 --> 00:24:48,970
>> UDJENZA: Għaliex ma jkun wieħed?

488
00:24:48,970 --> 00:24:51,350
>> Lauren CARVALHO: One ampersand huwa
attwalment xi ħaġa differenti, u huwa

489
00:24:51,350 --> 00:24:53,390
operatur bitwise, li tkun taf
jitgħallmu dwar aktar tard.

490
00:24:53,390 --> 00:24:58,250
Imma hija xi ħaġa li attwalment xogħlijiet
bil-bits ta 'numru partikolari.

491
00:24:58,250 --> 00:25:00,872
>> LUCAS FREITAS: Just jaħsbu li ma
jkollhom għalfejn tinkwieta dwar dan għal issa.

492
00:25:00,872 --> 00:25:04,590
>> Lauren CARVALHO: Naħseb li huwa probabbilment
ġejjin ġimgħa d-dieħla.

493
00:25:04,590 --> 00:25:06,420
>> LUCAS FREITAS: Kwalunkwe mistoqsijiet oħra?

494
00:25:06,420 --> 00:25:07,990
Nru?

495
00:25:07,990 --> 00:25:12,480
>> Lauren CARVALHO: Allura aħna stajt tidher li
jimblokka jistgħux jiffunzjonaw waħedhom, iżda din tista '

496
00:25:12,480 --> 00:25:15,370
wkoll jiġu paired ma 'u ieħor blokk.

497
00:25:15,370 --> 00:25:18,880
Allura f'dan il-każ, jekk n hija akbar minn
0, aħna qed tmur biex jistampa "You

498
00:25:18,880 --> 00:25:23,855
qabad numru pożittiv. "oħra, li jfisser
jekk huwa ta '0 jew jekk huwa inqas

499
00:25:23,855 --> 00:25:27,170
minn 0, aħna qed tmur biex jistampa,
"Inti qabad numru negattiv."

500
00:25:27,170 --> 00:25:30,390
>> Il-ħaġa interessanti hawnhekk huwa li dawn
huma esklussivi ta 'xulxin.

501
00:25:30,390 --> 00:25:33,940
Hemm qatt ma se jkun hemm każ
fejn dan u dan

502
00:25:33,940 --> 00:25:35,544
tista 'kemm jistampa.

503
00:25:35,544 --> 00:25:38,190

504
00:25:38,190 --> 00:25:41,030
>> Jien ċert li inti ħadmet mal-jekk / inkella
kaxxa fil Scratch, għalhekk dan għandu jkun

505
00:25:41,030 --> 00:25:42,392
pretty familjari.

506
00:25:42,392 --> 00:25:42,874
Iva?

507
00:25:42,874 --> 00:25:48,522
>> UDJENZA: Għandna bżonn l-ispazju bejn
int n ugwali GetInt imbagħad ispazju fil-

508
00:25:48,522 --> 00:25:49,460
jekk id-dikjarazzjoni?

509
00:25:49,460 --> 00:25:51,565
Bħal nużaw linja [inaudible]

510
00:25:51,565 --> 00:25:52,790
>> Lauren CARVALHO: Oh, l-ispazju hawn?

511
00:25:52,790 --> 00:25:56,742
>> UDJENZA: Bħal dik, iżda
inti doppja ispazju.

512
00:25:56,742 --> 00:25:58,718
Le, go up.

513
00:25:58,718 --> 00:25:59,706
Mur up.

514
00:25:59,706 --> 00:26:00,610
>> LUCAS FREITAS: Biss il-linja?

515
00:26:00,610 --> 00:26:01,140
>> UDJENZA: Yeah.

516
00:26:01,140 --> 00:26:02,870
>> LUCAS FREITAS: Biss il-linja vojta?

517
00:26:02,870 --> 00:26:03,270
>> UDJENZA: Yeah.

518
00:26:03,270 --> 00:26:04,070
>> Lauren CARVALHO: Linja Blank?

519
00:26:04,070 --> 00:26:04,470
Nru.

520
00:26:04,470 --> 00:26:06,320
Li jinsab biss ħaġa stilistiċi.

521
00:26:06,320 --> 00:26:09,360
>> LUCAS FREITAS: Huwa biss simili kultant
inti biss skip xi linji hekk

522
00:26:09,360 --> 00:26:12,330
li l-kodiċi ma look like
blokk enormi ta 'test.

523
00:26:12,330 --> 00:26:15,800
>> Lauren CARVALHO: Naħseb li dak li ġara
kienet li kellna kumment hawn, imma I

524
00:26:15,800 --> 00:26:18,220
ħa out sabiex inti guys jkollhom
biex jaħsbu dwar il-kodiċi pjuttost

525
00:26:18,220 --> 00:26:19,920
minn aqra biss kumment tiegħi.

526
00:26:19,920 --> 00:26:24,170
B'mod ġenerali, spazjar mhux se verament
jaffettwaw il-mod program tiegħek runs.

527
00:26:24,170 --> 00:26:26,070
Huwa aktar ta 'ħaġa stilistiċi.

528
00:26:26,070 --> 00:26:29,460
U meta aħna għandna l-Gwida tal-Istil aġġornat
u lesta li tmur sa l-aħħar ta '

529
00:26:29,460 --> 00:26:33,260
supersection, aħna ser nitkellmu
dwar dan aktar.

530
00:26:33,260 --> 00:26:34,660
>> Hemm xi ħaġa ħażina ma
dan il-programm, id-dritt?

531
00:26:34,660 --> 00:26:38,980
Minħabba 0 mhuwiex verament
numru negattiv.

532
00:26:38,980 --> 00:26:40,270
Mela ejja ara jekk nistgħu jiffissaw dak.

533
00:26:40,270 --> 00:26:45,710

534
00:26:45,710 --> 00:26:48,370
>> Inti tista 'probabbilment jimmaġina
ma 'dan jgħid, id-dritt?

535
00:26:48,370 --> 00:26:52,850
Jekk n hija akbar minn 0, aħna istampar, "You
qabad numru pożittiv. "Imbagħad inkella

536
00:26:52,850 --> 00:26:57,340
jekk n huwa inqas minn 0, "Inti qabad
numru negattiv. "inkella," Inti qabad

537
00:26:57,340 --> 00:27:01,040
0. "

538
00:27:01,040 --> 00:27:06,030
>> Issa l-ħaġa interessanti hija li
din tista 'tmur fuq għal dejjem.

539
00:27:06,030 --> 00:27:10,020
Inti jista 'jkollhom jekk blokk, l-ieħor jekk
blokk, ieħor inkella jekk blokk, inkella jekk,

540
00:27:10,020 --> 00:27:14,790
inkella jekk, inkella jekk, inkella, bażikament
sakemm inti tixtieq.

541
00:27:14,790 --> 00:27:17,110
U meta mibnija bħal din,
dawn huma kollha ser ikunu

542
00:27:17,110 --> 00:27:19,206
esklussiva tal xulxin.

543
00:27:19,206 --> 00:27:19,650
Iva?

544
00:27:19,650 --> 00:27:24,130
>> UDJENZA: Allura għaliex ma tistax inti biss użu
ieħor jekk minflok [inaudible]?

545
00:27:24,130 --> 00:27:26,990
>> Lauren CARVALHO: F'dan il-każ, iva I
tista 'tuża ieħor jekk, u jkun

546
00:27:26,990 --> 00:27:29,190
assolutament multa minħabba li l-
kondizzjonijiet infushom huma

547
00:27:29,190 --> 00:27:30,600
esklussiva tal xulxin.

548
00:27:30,600 --> 00:27:33,560
Iżda jekk il-kundizzjonijiet kinux esklussiva
ta 'xulxin, dan kieku

549
00:27:33,560 --> 00:27:37,596
jġegħluhom qatt kemm tevalwa,
jekk dan jagħmel sens.

550
00:27:37,596 --> 00:27:44,195
>> UDJENZA: F'dak il-każ, nistgħu bejta
it-tieni, jekk fl-ewwel jekk?

551
00:27:44,195 --> 00:27:46,160
>> Lauren CARVALHO: Jekk -
X'tifhem?

552
00:27:46,160 --> 00:27:49,660
>> UDJENZA: Jekk iż-żewġ kondizzjonijiet
ma jeskludux lil xulxin?

553
00:27:49,660 --> 00:27:54,700
>> Lauren CARVALHO: Jekk il-kondizzjonijiet
ma jeskludux lil xulxin?

554
00:27:54,700 --> 00:27:58,000
Imma inti tixtieq wieħed minnhom biss jiddekorri?

555
00:27:58,000 --> 00:28:00,260
>> UDJENZA: Inti tixtieq sempliċiment
jekk minflok ta 'ieħor.

556
00:28:00,260 --> 00:28:01,020
>> Lauren CARVALHO: Yeah.

557
00:28:01,020 --> 00:28:03,630
Hemm dejjem se jkunu lottijiet
ta 'modi li inti tista' tagħmel dan.

558
00:28:03,630 --> 00:28:06,600
Inti tista 'definittivament bejta tagħhom.

559
00:28:06,600 --> 00:28:10,390
U tkun taf tara fil-slide futur li
inti jista 'jkollhom IFs multipli, wieħed biss

560
00:28:10,390 --> 00:28:11,680
wara l-oħra.

561
00:28:11,680 --> 00:28:14,840
Iżda dan huwa mod ta 'loġikament
organizzazzjoni tal-fluss tal-programm tiegħek.

562
00:28:14,840 --> 00:28:18,000
>> LUCAS FREITAS: U hemm waħda aktar
ħaġa, hija li inti tlabt dwar it-tqegħid

563
00:28:18,000 --> 00:28:20,110
jekk u mbagħad ieħor jekk.

564
00:28:20,110 --> 00:28:25,240
Li tkun taħdem perfettament, iżda huwa ħażin
disinn għaliex bażikament jekk inti

565
00:28:25,240 --> 00:28:29,320
jivverifika l-ewwel jekk, u tinnota li
in-numru huwa akbar minn 0, inti

566
00:28:29,320 --> 00:28:30,660
tista 'biss finitura-programm.

567
00:28:30,660 --> 00:28:33,080
Inti ma għandekx biex jiċċekkjaw jekk
huwa inqas minn 0, right?

568
00:28:33,080 --> 00:28:37,510
>> Imma jekk inti jekk jekk, huwa għaddej biex jiċċekkjaw
tnejn, filwaqt li jekk nagħmel jekk inkella huwa,

569
00:28:37,510 --> 00:28:39,260
li għaddej biex jiċċekkjaw jekk
huwa akbar minn 0.

570
00:28:39,260 --> 00:28:43,500
Jekk huwa, mhuwiex ser ukoll tfittex
fil-linji l-oħra tal-kodiċi.

571
00:28:43,500 --> 00:28:48,560
Allura int bażikament verifika hija simili
darbtejn għalxejn, b'tali mod li għalhekk aħna

572
00:28:48,560 --> 00:28:50,750
tagħmel jekk inkella jekk.

573
00:28:50,750 --> 00:28:52,350
Kwalunkwe mistoqsijiet oħra?

574
00:28:52,350 --> 00:28:56,547
>> UDJENZA: Allura l-funzjonalità
ta 'l-ieħor jekk hu l-istess bħal

575
00:28:56,547 --> 00:28:57,790
jekk kien biss jekk?

576
00:28:57,790 --> 00:28:58,470
>> Lauren CARVALHO: Le

577
00:28:58,470 --> 00:29:02,720
Int fil-fatt se tara fil-li jmiss tiegħi
slide eżempju fejn jista '

578
00:29:02,720 --> 00:29:03,270
jkun differenti.

579
00:29:03,270 --> 00:29:05,690
F'dan il-każ, huwa kważi l-istess.

580
00:29:05,690 --> 00:29:10,190

581
00:29:10,190 --> 00:29:15,410
>> Allura hawnhekk, għandna eżempju ta 'multipli
jekk ir-rapporti, u l-

582
00:29:15,410 --> 00:29:20,020
funzjonalità mhijiex l-istess
bħallikieku I kien biss qal jekk

583
00:29:20,020 --> 00:29:23,120
inkella, jekk inkella, jekk ieħor.

584
00:29:23,120 --> 00:29:26,970
Ejja biss jaħsbu dwar dak li jistampaw
jekk I daħħal in-numru 95

585
00:29:26,970 --> 00:29:27,715
fis dan il-programm.

586
00:29:27,715 --> 00:29:29,764
>> UDJENZA: [inaudible]

587
00:29:29,764 --> 00:29:31,102
>> Lauren CARVALHO: U allura?

588
00:29:31,102 --> 00:29:32,340
>> UDJENZA: [inaudible]

589
00:29:32,340 --> 00:29:33,680
>> Lauren CARVALHO: Yeah.

590
00:29:33,680 --> 00:29:37,430
Allura f'dan il-każ, dawn il-kondizzjonijiet
ma jeskludux lil xulxin ta 'xulxin.

591
00:29:37,430 --> 00:29:41,040
U għaliex hemm xejn waqfien
din il-kundizzjoni milli jevalwaw jekk dan

592
00:29:41,040 --> 00:29:44,730
wieħed diġà, dawn qed biss
lkoll se jistampa.

593
00:29:44,730 --> 00:29:46,222
Allura kif jista I jiffissaw dan?

594
00:29:46,222 --> 00:29:47,608
>> UDJENZA: IFs inkella?

595
00:29:47,608 --> 00:29:48,910
>> Lauren CARVALHO: Tista 'tuża IFs ieħor.

596
00:29:48,910 --> 00:29:50,590
I tista 'tbiddel l-ordni
ta 'dawn, id-dritt?

597
00:29:50,590 --> 00:29:53,800
Jekk jien ma l-ewwel dan wieħed?

598
00:29:53,800 --> 00:29:55,120
Well, attwalment, l-ebda.

599
00:29:55,120 --> 00:29:57,100
Li ma tkun taħdem għal 95.

600
00:29:57,100 --> 00:29:58,490
>> LUCAS FREITAS: Le, biss l-IFs ieħor.

601
00:29:58,490 --> 00:30:01,720
>> IFs Il inkella: Lauren CARVALHO
kienu jiffissaw dan.

602
00:30:01,720 --> 00:30:07,050
Does li tiċċara l-konfużjoni
bejn IFs u ieħor IFs?

603
00:30:07,050 --> 00:30:11,480
>> UDJENZA: I biss riedu li jistaqsu għalik, jekk
inti ma tuża inkella jekk, ikun tieqaf?

604
00:30:11,480 --> 00:30:11,840
>> Lauren CARVALHO: Dritt.

605
00:30:11,840 --> 00:30:13,330
Allura biss dan l-ewwel wieħed.

606
00:30:13,330 --> 00:30:16,535
Jekk I jiddaħħal in-numru 95, biss dan
kienu stampati, u qatt ma

607
00:30:16,535 --> 00:30:17,934
kieku mxew għall-ieħor.

608
00:30:17,934 --> 00:30:22,570
>> LUCAS FREITAS: Just tip ta 'jaħsbu
bħala jekk dan jiġri, jagħmlu dan.

609
00:30:22,570 --> 00:30:26,990
Il-ħaġa oħra hija simili jekk le, check
għal dan, u mbagħad tagħmel dan.

610
00:30:26,990 --> 00:30:28,690
Allura bħal dawn qed kollha reċiprokament
esklussiva.

611
00:30:28,690 --> 00:30:30,270
Inti ma tistax tikseb fis tnejn fuq dawk.

612
00:30:30,270 --> 00:30:32,800

613
00:30:32,800 --> 00:30:37,630
>> UDJENZA: Tista 'tuża loġiku
U għal dik is-sitwazzjoni?

614
00:30:37,630 --> 00:30:39,370
>> Lauren CARVALHO: Yeah.

615
00:30:39,370 --> 00:30:41,400
C'est mod ieħor li nistgħu
iffissaw din il-problema.

616
00:30:41,400 --> 00:30:43,470
Aħna setgħet definiti
tvarja, right?

617
00:30:43,470 --> 00:30:49,410
So I setgħet qal jekk n hija akbar
minn 90 u inqas minn -

618
00:30:49,410 --> 00:30:52,135
ukoll, I raden dan wieħed ma verament
kwistjoni, iżda hawnhekk I setgħet qal jekk

619
00:30:52,135 --> 00:30:53,960
n hija akbar minn 80 u inqas minn 90.

620
00:30:53,960 --> 00:30:55,570
Akbar minn 70, inqas minn 80.

621
00:30:55,570 --> 00:30:59,077
Li ħadmu wkoll.

622
00:30:59,077 --> 00:30:59,891
>> [Rires]

623
00:30:59,891 --> 00:31:00,980
>> LUCAS FREITAS: Hi jibżgħu.

624
00:31:00,980 --> 00:31:02,070
>> Lauren CARVALHO: Tibżgħux.

625
00:31:02,070 --> 00:31:04,570
>> LUCAS FREITAS: Mhuwiex
li se jkun żbaljat.

626
00:31:04,570 --> 00:31:08,630
Huwa biss li huwa bla bżonn
verbose.

627
00:31:08,630 --> 00:31:13,480
Bħal fil-xjenza tal-kompjuter, wieħed għandu
ikunu sempliċi kemm jista 'jkun sakemm

628
00:31:13,480 --> 00:31:14,730
inti għandek il-funzjonalità.

629
00:31:14,730 --> 00:31:16,725

630
00:31:16,725 --> 00:31:17,835
Tixtieq il-kandju?

631
00:31:17,835 --> 00:31:19,084
>> UDJENZA: M'għandekx bżonnha.

632
00:31:19,084 --> 00:31:20,340
>> Lauren CARVALHO: Inti Tnaffir
kulħadd, Lucas.

633
00:31:20,340 --> 00:31:21,590
>> LUCAS FREITAS: Jiddispjacini.

634
00:31:21,590 --> 00:31:24,650

635
00:31:24,650 --> 00:31:29,510
>> Lauren CARVALHO: David semma wkoll
dawn jaqilbu dikjarazzjoni fil-klassi.

636
00:31:29,510 --> 00:31:33,180
Bażikament dak li għaddej huwa l-bidla
dikjarazzjoni tieħu varjabbli.

637
00:31:33,180 --> 00:31:35,760
F'dan il-każ, aħna qed tieħu numru sħiħ.

638
00:31:35,760 --> 00:31:39,220
>> Jekk n-numru sħiħ huwa 1, aħna qed tmur biex
jistampa, "Inti qabad żgħir

639
00:31:39,220 --> 00:31:42,000
numru. "Jekk l-eqreb numru sħiħ huwa 1," You
qabad numru medju. "Jekk il-

640
00:31:42,000 --> 00:31:45,730
integer huwa 3, "Inti qabad għolja
numru. "U kelli wkoll każ default

641
00:31:45,730 --> 00:31:50,020
stabbiliti hawn, iżda mhux li turi
up, li huwa wisq bad.

642
00:31:50,020 --> 00:31:53,120

643
00:31:53,120 --> 00:31:55,360
>> Bażikament, dan huwa biss
sintassi ieħor.

644
00:31:55,360 --> 00:31:58,640
Nistgħu implimentaw din eżatta
istess ħaġa ma 'jekk u inkella jekk

645
00:31:58,640 --> 00:31:59,390
dikjarazzjonijiet.

646
00:31:59,390 --> 00:32:05,530
Iżda meta jkun hemm lottijiet ta 'differenti
kundizzjonijiet u lottijiet ta 'differenti

647
00:32:05,530 --> 00:32:10,350
varjazzjonijiet fuq dak li inti trid tagħmel għall-
kull input, din hija għażla.

648
00:32:10,350 --> 00:32:13,262
Allura huwa biss sintassi tajjeb li tkun taf.

649
00:32:13,262 --> 00:32:15,099
Iva?

650
00:32:15,099 --> 00:32:21,380
>> UDJENZA: Għaliex hemm ma backslash
n fil-ewwel waħda?

651
00:32:21,380 --> 00:32:23,340
>> Lauren CARVALHO: Għal up hemm?

652
00:32:23,340 --> 00:32:27,600
M'hemm l-ebda backslash n up hemm
minħabba li l-GetInt -

653
00:32:27,600 --> 00:32:30,140
jekk inti tipprova dan, inneħħu
jagħtik dan pront.

654
00:32:30,140 --> 00:32:32,290
Agħti me integer bejn 1 u 3.

655
00:32:32,290 --> 00:32:35,550
U jekk nressaq il-n backlash, ikun
jieħdu me għall-linja li jmiss, imma jien biss

656
00:32:35,550 --> 00:32:38,690
riedu biex tip-numru sħiħ
dritt wara l-kolon.

657
00:32:38,690 --> 00:32:40,120
Inti seta 'tefa' n backlash.

658
00:32:40,120 --> 00:32:42,374
Mhuwiex a big deal.

659
00:32:42,374 --> 00:32:43,288
Yeah?

660
00:32:43,288 --> 00:32:50,525
>> UDJENZA: Għal dan il-kodiċi, huwa dan
F'każ wieħed, hija li minħabba

661
00:32:50,525 --> 00:32:51,760
huwa l-ewwel każ?

662
00:32:51,760 --> 00:32:52,260
Minħabba -

663
00:32:52,260 --> 00:32:53,400
>> Lauren CARVALHO: No, no, no.

664
00:32:53,400 --> 00:32:56,480
Allura dan huwa jagħti me integer
bejn 1 u 3.

665
00:32:56,480 --> 00:32:59,070
Jekk n huwa 1, I Stampa din.

666
00:32:59,070 --> 00:33:02,740
Jekk I kien talab għall-ittri, I jista 'jkollhom
qal jagħtu me ittra bejn A

667
00:33:02,740 --> 00:33:04,935
u C. Imbagħad dan ikun il-każ A.

668
00:33:04,935 --> 00:33:05,910
>> UDJENZA: [inaudible].

669
00:33:05,910 --> 00:33:08,090
Il-każ kien biss [inaudible]

670
00:33:08,090 --> 00:33:11,260
>> Lauren CARVALHO: Yeah, id-dritt.

671
00:33:11,260 --> 00:33:11,550
Yeah?

672
00:33:11,550 --> 00:33:14,861
>> UDJENZA: X'jiġri jekk inti riedu li jkollhom
aktar ta 'espressjoni relazzjonali?

673
00:33:14,861 --> 00:33:17,645
Allura minflok ta 'tgħid n
daqs 1, [inaudible]

674
00:33:17,645 --> 00:33:21,050
n hija akbar minn 1 fl-ewwel każ?

675
00:33:21,050 --> 00:33:26,630
>> Lauren CARVALHO: Fil-fatt, jekk I ma
jiddefinixxu xi wħud minn dawn il-każijiet, dan kieku

676
00:33:26,630 --> 00:33:28,500
jkun twettaq isfel.

677
00:33:28,500 --> 00:33:30,680
Allura fil-fatt, forsi dan mhux
dak li qed titlob.

678
00:33:30,680 --> 00:33:36,240
>> LUCAS FREITAS: I think hi tistaqsi jekk
il-każ kien n akbar minn 0, każ

679
00:33:36,240 --> 00:33:37,150
inqas minn 0.

680
00:33:37,150 --> 00:33:39,210
>> Lauren CARVALHO: Forsi l-iswiċċ
dikjarazzjoni mhuwiex verament dak li trid

681
00:33:39,210 --> 00:33:39,880
għall-użu f'dak il-każ.

682
00:33:39,880 --> 00:33:42,420
>> LUCAS FREITAS: Id-dikjarazzjoni switch hu
biss għall-valur, hekk int iċċekkjar ta '

683
00:33:42,420 --> 00:33:45,370
il-valur huwa bħal dan jew dak.

684
00:33:45,370 --> 00:33:47,025
Allura inti ma tistax attwalment
tpoġġi kondizzjonijiet.

685
00:33:47,025 --> 00:33:50,988

686
00:33:50,988 --> 00:33:55,920
>> UDJENZA: X'jiġri jekk il-persuna
tipi ma [inaudible]?

687
00:33:55,920 --> 00:33:58,240
>> Lauren CARVALHO: Dan kien ikun
każ default tiegħi, li sfortunatament

688
00:33:58,240 --> 00:33:58,910
inti ma tistax tara.

689
00:33:58,910 --> 00:34:02,240
>> LUCAS FREITAS: [inaudible]
jagħmluhom tara.

690
00:34:02,240 --> 00:34:03,690
>> Lauren CARVALHO: Attwalment,
inti taf liema?

691
00:34:03,690 --> 00:34:07,795
Ejja biss jmorru biex jistudjaw 50, u I se
biss zoom fuq il-pjastri fuq studju

692
00:34:07,795 --> 00:34:10,610
50, għaliex dan huwa biss annoying.

693
00:34:10,610 --> 00:34:14,938
So let me fil-fatt imorru għall-kundizzjoni.

694
00:34:14,938 --> 00:34:17,860
Dan huwa biss se
tieħu ftit ftit.

695
00:34:17,860 --> 00:34:26,940

696
00:34:26,940 --> 00:34:27,840
>> Kull dritt.

697
00:34:27,840 --> 00:34:29,590
Allura, jien sorry.

698
00:34:29,590 --> 00:34:33,625
Mill-inqas issa aħna ser tkun tista 'tara
kollox mingħajr ma qtugħ off.

699
00:34:33,625 --> 00:34:36,230

700
00:34:36,230 --> 00:34:36,969
Kull dritt.

701
00:34:36,969 --> 00:34:43,800
>> Mela jekk jitqiegħdu fil-10, aħna se default
hawn biex każ default tiegħi, u jien

702
00:34:43,800 --> 00:34:46,510
kien biss print invalidu minħabba I
talbithom biex jidħlu numru sħiħ

703
00:34:46,510 --> 00:34:49,460
bejn 1 u 3.

704
00:34:49,460 --> 00:34:50,650
Kwalunkwe mistoqsijiet oħra?

705
00:34:50,650 --> 00:34:51,081
Yeah?

706
00:34:51,081 --> 00:34:57,590
>> UDJENZA: Ejja ngħidu għal każ wieħed, każ
tlieta, jiġifieri inti ried li jkun l-

707
00:34:57,590 --> 00:35:00,950
istess ħaġa, sabiex inti qabad numru
li mhux numru medju.

708
00:35:00,950 --> 00:35:03,840
F'dak il-każ, ikun żejda?

709
00:35:03,840 --> 00:35:08,371
Kieku inti biss bidla it-test kemm fil-
minnhom, jew ikun hemm xi

710
00:35:08,371 --> 00:35:08,617
redundancy?

711
00:35:08,617 --> 00:35:11,920
Hemm xi mod biex jgħaqqdu
[Inaudible]?

712
00:35:11,920 --> 00:35:15,810
>> Lauren CARVALHO: Hemm modi biex
għaqqadhom, imma nemmen li inti tista '

713
00:35:15,810 --> 00:35:18,730
biss jgħaqqdu dawk li jmissu magħhom.

714
00:35:18,730 --> 00:35:22,250
Mela jekk jien ma ddefinitx xejn
għall-każ tnejn, dan kieku

715
00:35:22,250 --> 00:35:24,130
japplikaw għaż-żewġ kawżi.

716
00:35:24,130 --> 00:35:28,110
Oh, jekk I ma poġġiex xejn għall-każ
wieħed, dan ikun japplika kemm

717
00:35:28,110 --> 00:35:30,620
F'każ wieħed u tnejn.

718
00:35:30,620 --> 00:35:33,616
Jekk dan jagħmel sens.

719
00:35:33,616 --> 00:35:35,872
>> UDJENZA: Tista nirrepeti li wieħed?

720
00:35:35,872 --> 00:35:36,670
>> LUCAS FREITAS: OK.

721
00:35:36,670 --> 00:35:39,950
Jekk inti ma bażikament, bħal, għandek
l-istess ħaġa, imma inti ma jitqiegħdu

722
00:35:39,950 --> 00:35:46,820
xejn hawn, youd tkun jew għall-
każ każ tnejn wieħed jew, jagħmlu dan.

723
00:35:46,820 --> 00:35:47,930
Dritt?

724
00:35:47,930 --> 00:35:54,010
U dan break ifisser li jekk ikollok
dan il-każ, biss leave.

725
00:35:54,010 --> 00:35:55,030
Allura dak hu li l-brejk mezzi.

726
00:35:55,030 --> 00:35:59,755
Mela jekk jien biss ma dan, inti tfittex, huwa
F'każ wieħed, u inti biss tagħmel dan.

727
00:35:59,755 --> 00:36:02,110
Jekk kien il-każ tnejn, ikun ukoll
biss jiġu hawn u tagħmel dan.

728
00:36:02,110 --> 00:36:03,544
>> UDJENZA: Iżda int tista 'tagħmel dan?

729
00:36:03,544 --> 00:36:05,140
Jekk hemm xi ħaġa għal
każ żewġ [inaudible]

730
00:36:05,140 --> 00:36:07,095
>> Lauren CARVALHO: I ma nemminx
inti tista 'tagħmel dan.

731
00:36:07,095 --> 00:36:09,380
Ma naħsibx inti tista 'skip madwar.

732
00:36:09,380 --> 00:36:11,070
Inti tista 'tagħmel dan, Rob?

733
00:36:11,070 --> 00:36:13,300
I ma naħsibx.

734
00:36:13,300 --> 00:36:16,548
>> UDJENZA: numru wieħed So biss
tista 'tmur wara każ, id-dritt?

735
00:36:16,548 --> 00:36:21,410
Ma jistax ikun hemm każ wieħed, comma, tnejn?

736
00:36:21,410 --> 00:36:21,970
>> LUCAS FREITAS: Le, inti ma tistax.

737
00:36:21,970 --> 00:36:25,085
You definitely ma jistgħux.

738
00:36:25,085 --> 00:36:28,770
>> Lauren CARVALHO: I mean, il-punt huwa
din hija għażla, u dan jista 'ma jkunx

739
00:36:28,770 --> 00:36:31,940
tajbin użu każ tiegħek, hekk allura inti
tuża l-jekk il-kondizzjonijiet.

740
00:36:31,940 --> 00:36:33,906
>> UDJENZA: Allura għaliex kieku inti tagħmel dan?

741
00:36:33,906 --> 00:36:34,314
Is-swiċċ?

742
00:36:34,314 --> 00:36:38,540
>> Lauren CARVALHO: Nixtieq jużaw dan
jekk ikollok ħafna u definiti -

743
00:36:38,540 --> 00:36:39,730
attwalment, Lucas, huwa int imblukkar.

744
00:36:39,730 --> 00:36:40,982
>> LUCAS FREITAS: Oh, sorry.

745
00:36:40,982 --> 00:36:44,200
>> Lauren CARVALHO: Jekk ikollok ħafna
imgieba definiti li tixtieq għall-

746
00:36:44,200 --> 00:36:48,105
kull input, dan jista 'jkun
ftit aktar konċiża minn miktub out

747
00:36:48,105 --> 00:36:49,530
IF dikjarazzjoni għal kull wieħed.

748
00:36:49,530 --> 00:36:51,210
>> UDJENZA: X'tagħmel l-
break ifisser mill-ġdid?

749
00:36:51,210 --> 00:36:53,180
>> Lauren CARVALHO: Il-waqfa ifisser tieqaf.

750
00:36:53,180 --> 00:36:56,860
Ftakar, jekk I ma kellhomx dan il-brejk
hawnhekk, aħna għadek waqgħu

751
00:36:56,860 --> 00:36:58,110
fil-każ li jmiss.

752
00:36:58,110 --> 00:37:00,820
>> LUCAS FREITAS: Break mezzi biex jiksbu
barra tad-dikjarazzjoni swiċċ.

753
00:37:00,820 --> 00:37:03,400
Għaliex jekk huwa 1, nixtieq
li jistampaw dan u leave.

754
00:37:03,400 --> 00:37:04,640
Ma rridx li jiċċekkjaw kull ħaġ'oħra.

755
00:37:04,640 --> 00:37:05,790
>> UDJENZA: Inti ma tridx
li jistampaw kull ħaġ'oħra.

756
00:37:05,790 --> 00:37:06,730
>> LUCAS FREITAS: Yeah.

757
00:37:06,730 --> 00:37:08,260
Għaliex dan huwa reċiprokament esklussivi.

758
00:37:08,260 --> 00:37:11,378
>> UDJENZA: U ma dan jipproċedu biss
għall-każ li jmiss jekk l-ewwel każ

759
00:37:11,378 --> 00:37:11,850
mhux veru?

760
00:37:11,850 --> 00:37:14,120
Jew ma tittestja l-każijiet kollha
fl-istess ħin?

761
00:37:14,120 --> 00:37:16,300
>> LUCAS FREITAS: Le,
kontrolli sekwenzjali.

762
00:37:16,300 --> 00:37:18,070
Sekwenzjalment, yeah.

763
00:37:18,070 --> 00:37:21,840
Mistoqsija waħda aktar, allura aħna ħadthom ltqajna biex
jimxu fuq hekk aħna tista 'tkopri kollox.

764
00:37:21,840 --> 00:37:22,300
Yeah?

765
00:37:22,300 --> 00:37:25,280
>> UDJENZA: Dan għall-każ, jista 'jkollu
jsir xi ħaġa minbarra biss l-waħda?

766
00:37:25,280 --> 00:37:27,680
Tista 'tagħti dan firxa?

767
00:37:27,680 --> 00:37:28,580
>> LUCAS FREITAS: Le

768
00:37:28,580 --> 00:37:29,900
>> Lauren CARVALHO: Ma naħsibx
inti tista 'tagħtiha firxa.

769
00:37:29,900 --> 00:37:31,430
>> LUCAS FREITAS: Inti ma tista 'inti
ma tistax tagħtiha firxa.

770
00:37:31,430 --> 00:37:33,190
>> UDJENZA: Il-każ huwa speċifiku
[Inaudible].

771
00:37:33,190 --> 00:37:34,840
>> LUCAS FREITAS: Ixgħel
huwa tip ta 'valuri.

772
00:37:34,840 --> 00:37:38,400
Inti tagħmel affarijiet differenti li jiddependu
fuq valur, valur speċifiku.

773
00:37:38,400 --> 00:37:41,050
Inti ma tistax tagħmel firxa, inti ma tistax
tagħmel xi ħaġa oħra.

774
00:37:41,050 --> 00:37:43,055
Huwa biss ieħor għodda biex tara.

775
00:37:43,055 --> 00:37:46,570
>> Lauren CARVALHO: Ħafna nies ma jużawx
jaqilbu dikjarazzjonijiet ħafna fl CS50,

776
00:37:46,570 --> 00:37:48,760
iżda huwa hemmhekk.

777
00:37:48,760 --> 00:37:49,920
>> Kull dritt.

778
00:37:49,920 --> 00:37:53,870
Allura l-ħaġa li jmiss aħna qed tmur biex jitkellmu
dwar huwa l-operatur ternarji.

779
00:37:53,870 --> 00:37:56,650
Dan huwa biss tip ieħor
ta kondizzjonali.

780
00:37:56,650 --> 00:38:01,460
Bażikament dak li għaddej hawnhekk huwa jien
jitolbu għal integer, u jekk n hija

781
00:38:01,460 --> 00:38:05,550
ikbar minn 100, jien ser jistampa
"Għoli." Jekk mhuwiex, jien ser

782
00:38:05,550 --> 00:38:07,010
print out "baxx."

783
00:38:07,010 --> 00:38:11,230
>> Allura dak li qed jagħmel l-kundizzjoni hija
dritt hawn fil-parentesi, u inti

784
00:38:11,230 --> 00:38:13,550
tista 'tip ta' think tal-kwistjoni
kif jien tistaqsi jekk

785
00:38:13,550 --> 00:38:15,030
dan huwa veru jew le.

786
00:38:15,030 --> 00:38:18,485
Jekk huwa veru, jien ser jagħmlu dan l-ewwel
ħaġa, u jekk mhuwiex veru, jien

787
00:38:18,485 --> 00:38:20,020
ser jagħmlu dan it-tieni ħaġa.

788
00:38:20,020 --> 00:38:23,520

789
00:38:23,520 --> 00:38:27,960
>> Xi mistoqsijiet dwar l-
operatur ternarji?

790
00:38:27,960 --> 00:38:30,880
>> LUCAS FREITAS: Just jridu nota minn
David huwa li kull meta inti għandek

791
00:38:30,880 --> 00:38:33,346
kundizzjoni -

792
00:38:33,346 --> 00:38:35,690
>> Lauren CARVALHO: I raden David
jaraw permezz tal-live stream.

793
00:38:35,690 --> 00:38:37,210
>> LUCAS FREITAS: He qed jagħmel
ħajja stream dritt issa.

794
00:38:37,210 --> 00:38:41,730
Allura meta għandek kundizzjoni, int
suppost li tpoġġi ċineg kaboċċi,

795
00:38:41,730 --> 00:38:45,320
bħad għandna fil-swiċċ
dikjarazzjoni hawn.

796
00:38:45,320 --> 00:38:46,750
Għandna braces kaboċċi hawn.

797
00:38:46,750 --> 00:38:49,560
Għal kwalunkwe kundizzjonijiet, int
suppost li wkoll ipoġġi dik.

798
00:38:49,560 --> 00:38:50,820
>> Lauren CARVALHO: Int ser ikollok tara
dan fil-gwida tal-istil.

799
00:38:50,820 --> 00:38:52,900
Aħna ma attwalment ikollhom l-
Gwida tal-Istil dritt issa.

800
00:38:52,900 --> 00:38:53,930
I think David għadhom jaħdmu.

801
00:38:53,930 --> 00:38:55,100
>> LUCAS FREITAS: Huwa qal li
huwa biss taħdem issa.

802
00:38:55,100 --> 00:38:56,120
>> Lauren CARVALHO: Oh, huwa xogħol issa?

803
00:38:56,120 --> 00:38:57,520
OK.

804
00:38:57,520 --> 00:39:02,060
Allura apparentement din is-sena fl-istil
gwida, anki jekk inti biss għandek linja waħda,

805
00:39:02,060 --> 00:39:06,040
inti stajt ltqajna biex tqiegħed dawn
braces kaboċċi pulzieri

806
00:39:06,040 --> 00:39:09,480
Inti ma neċessarjament bżonn għall-
funzjonalità tal-programm.

807
00:39:09,480 --> 00:39:12,210
U forsi għandna ħu pawża
wara li l-kondizzjonijiet u go straight

808
00:39:12,210 --> 00:39:14,620
għall-gwida tal-istil ċar
up xi wħud minn dawn l-affarijiet?

809
00:39:14,620 --> 00:39:15,010
>> LUCAS FREITAS: Yeah.

810
00:39:15,010 --> 00:39:15,775
Għandek xi mistoqsija?

811
00:39:15,775 --> 00:39:17,580
>> UDJENZA: Le, jien ser biss stenna
sa l-Gwida tal-Istil.

812
00:39:17,580 --> 00:39:19,578
>> UDJENZA: Tista 'tmur lura
lill-operatur ternarji?

813
00:39:19,578 --> 00:39:23,360
>> Lauren CARVALHO: ternarji, iva.

814
00:39:23,360 --> 00:39:29,010
>> LUCAS FREITAS: operatur ternarji hija
bażikament dikjarazzjoni jekk inkella, iżda

815
00:39:29,010 --> 00:39:33,590
minflok li jkollhom iż-żewġ linji
ta 'verifika ta' jekk u allura l-

816
00:39:33,590 --> 00:39:36,600
inkella, inti biss għandek linja waħda.

817
00:39:36,600 --> 00:39:40,930
Għalhekk bażikament jekk irrid li tagħti string
valur tal-għoli jew baxx, u I

818
00:39:40,930 --> 00:39:46,270
tixtieq li tagħmel għolja jekk n hija akbar minn
100 jew baxxa jekk huwa inqas, dak I tista 'tagħmel

819
00:39:46,270 --> 00:39:47,730
huwa dan [inaudible]

820
00:39:47,730 --> 00:39:53,060
l-sekwenza se tkun, u mbagħad I
titlob lill-programm huwa n akbar minn 100?

821
00:39:53,060 --> 00:39:55,750
>> Allura hu għalhekk li għandi din l-espressjoni
fil-parentesi u mbagħad

822
00:39:55,750 --> 00:39:56,580
il-kwistjoni mark.

823
00:39:56,580 --> 00:39:59,110
Jien tistaqsi huwa akbar minn 100?

824
00:39:59,110 --> 00:40:02,310
Jekk huwa, li għaddej biex tkun għolja.

825
00:40:02,310 --> 00:40:03,850
Jekk mhuwiex, li għaddej biex tkun baxxa.

826
00:40:03,850 --> 00:40:07,310
>> Allura bażikament dak li inti taħseb hija inti titlob
kwistjoni, hekk inti tpoġġi fil-parentesi

827
00:40:07,310 --> 00:40:08,620
il-kundizzjoni.

828
00:40:08,620 --> 00:40:11,160
Imbagħad inti tpoġġi l-kwistjoni mark
għaliex inti qed tistaqsi lilha.

829
00:40:11,160 --> 00:40:15,240
U jekk dan huwa minnu, li għaddej biex tkun
fl-ewwel valur [inaudible] hawn.

830
00:40:15,240 --> 00:40:18,176
Jekk mhuwiex, jien ser tpoġġi l-
valur li huwa wara l-kolon.

831
00:40:18,176 --> 00:40:21,580
Jagħmel sens?

832
00:40:21,580 --> 00:40:24,730
>> Huwa wkoll xi ħaġa li huwa simili
għodda C iżda inti ma għandekx

833
00:40:24,730 --> 00:40:25,700
speċifikament tużah.

834
00:40:25,700 --> 00:40:29,890
Iżda n-nies CS normalment simili li
għaliex hija biss jiffranka linji.

835
00:40:29,890 --> 00:40:31,050
>> Lauren CARVALHO: Huwa ħafna eleganti.

836
00:40:31,050 --> 00:40:32,951
Hija ma ħafna wieħed biss dikjarazzjoni.

837
00:40:32,951 --> 00:40:36,077
>> UDJENZA: Allura l-sinjal fil-mija hija
biss x'ikun r-riżultati fuq

838
00:40:36,077 --> 00:40:36,799
il-linja ta 'qabel?

839
00:40:36,799 --> 00:40:38,260
>> Lauren CARVALHO: Oh, jien sorry.

840
00:40:38,260 --> 00:40:42,670
Dan is-sinjal fil-mija huwa attwalment
placeholder għal dan i.

841
00:40:42,670 --> 00:40:46,160
Fi stqarrija printf, inti stajt ltqajna dan
string hawnhekk, li huwa dak li għaddej biex

842
00:40:46,160 --> 00:40:48,440
jistampa, imma int tista 'mhux biss
tpoġġi dan i fil hemmhekk.

843
00:40:48,440 --> 00:40:50,290
Inkella jistampaw
l-i litteralment.

844
00:40:50,290 --> 00:40:54,070
Allura aħna ipoġġi mija hawn biex iżommu
dan il-post miżmum għal kwalunkwe

845
00:40:54,070 --> 00:40:57,590
jiġi wara l-virgola.

846
00:40:57,590 --> 00:40:59,470
>> Allura għal string, inti stajt ltqajna fil-mija s.

847
00:40:59,470 --> 00:41:00,950
Għal integer, mija i.

848
00:41:00,950 --> 00:41:03,330
Għal float, mija f.

849
00:41:03,330 --> 00:41:06,960
Int ser ikollok tara dawk kif aħna
tara aktar eżempji.

850
00:41:06,960 --> 00:41:09,230
Imma forsi inti għandek tkellem dwar il-
Gwida tal-Istil għal ftit ftit, issa

851
00:41:09,230 --> 00:41:10,480
li huwa up.

852
00:41:10,480 --> 00:41:21,040

853
00:41:21,040 --> 00:41:24,010
>> LUCAS FREITAS: Jekk inti tmur
cs50.net/style, int ser tara

854
00:41:24,010 --> 00:41:25,760
il-Gwida tal-Istil.

855
00:41:25,760 --> 00:41:32,420
Għal settijiet problema, score tiegħek għall-
set problema hija komposta ta 'ambitu,

856
00:41:32,420 --> 00:41:35,510
li bażikament ifisser li jekk inti għamilt kollha
il-partijiet tal-problema sett jew jekk inti

857
00:41:35,510 --> 00:41:37,170
attentat xi ħaġa.

858
00:41:37,170 --> 00:41:41,120
It-tieni ħaġa hija korrettezza, li
mezzi huwa program tiegħek tagħmel dak li

859
00:41:41,120 --> 00:41:44,520
kien suppost li tkun qiegħda tagħmel, jew ma
jkollhom bugs, jew hija ma nagħmilx dak li

860
00:41:44,520 --> 00:41:45,620
huwa suppost tagħmel.

861
00:41:45,620 --> 00:41:51,420
>> It-tielet ħaġa hija, li jfisser
huma inti implimentazzjoni ta 'dan ukoll, jew

862
00:41:51,420 --> 00:41:54,520
inti jintużaw id-dikjarazzjonijiet żejda?

863
00:41:54,520 --> 00:41:59,400
Hekk per eżempju, jekk inti tixtieq li jirrepetu
numru 10 darbiet, inti kitba ta '

864
00:41:59,400 --> 00:42:03,040
għal loop jew li huma inti biss tagħmel 10 darbiet
l-istess dikjarazzjoni, biss tagħmel

865
00:42:03,040 --> 00:42:04,060
kopja u paste.

866
00:42:04,060 --> 00:42:05,760
Allura disinn huwa għal dan.

867
00:42:05,760 --> 00:42:07,420
>> U fl-aħħarnett, għandek stil.

868
00:42:07,420 --> 00:42:12,000
Style huwa bħad tiġġudika
jekk il-kodiċi tiegħek jistenna

869
00:42:12,000 --> 00:42:14,050
tinqara u tip ta 'pretty.

870
00:42:14,050 --> 00:42:16,520
Hija biss bażikament ifisser
huwa kodiċi tiegħek tinqara?

871
00:42:16,520 --> 00:42:20,560
Would xi ħadd ieħor li kien qed ifittex huma
kodiċi tiegħek tkun kapaċi jifhmu dak

872
00:42:20,560 --> 00:42:21,250
huwa tagħmel?

873
00:42:21,250 --> 00:42:25,360
Ma jkollu kummenti u simili?

874
00:42:25,360 --> 00:42:30,430
>> Ejja nitkellmu dwar l-istil li
int suppost għall-użu.

875
00:42:30,430 --> 00:42:32,200
L-ewwel ħaġa hija kummenti.

876
00:42:32,200 --> 00:42:35,280
Kummenti huma importanti ħafna għall tiegħek
kodiċi għaliex kultant int tagħmel

877
00:42:35,280 --> 00:42:38,750
programm tiegħek, u inti taf eżattament dak
inti tixtieq li tagħmel hekk inti biss tibda

878
00:42:38,750 --> 00:42:43,120
coding, biss tip up mazz ta 'C. Iżda
jekk xi ħadd ieħor qed tfittex huma int

879
00:42:43,120 --> 00:42:47,500
kodiċi, dawn qed mhux se tkun tista '
jifhmu għaliex dawn ma jkunux jafu

880
00:42:47,500 --> 00:42:51,420
l-affarijiet li huma fir-ras, bħall-
l pesudocode, hekk forsi dawn se

881
00:42:51,420 --> 00:42:53,970
jkollhom żmien diffiċli biex jifhmu
dak il-kodiċi qed tagħmel.

882
00:42:53,970 --> 00:42:57,900
>> Allura kummenti huma verament utli biex jispjegaw
għal xi ħadd li tħares lejn

883
00:42:57,900 --> 00:43:00,880
kodiċi tiegħek dak li qed jagħmel, u
fatt anke għalik,

884
00:43:00,880 --> 00:43:01,880
dawn qed utli ħafna.

885
00:43:01,880 --> 00:43:05,740
Kif inti tmur Psets diffiċli u iebes,
int ser tara li l-kodiċi gets

886
00:43:05,740 --> 00:43:10,590
itwal, u allura kummenti huma verament
importanti sabiex inti tiftakar dak li kull

887
00:43:10,590 --> 00:43:13,320
parti mill-programm tiegħek ma.

888
00:43:13,320 --> 00:43:16,920
>> Li jitqiegħed kumment, inti tista 'biss tagħmel
slash slash u mbagħad jikteb kumment.

889
00:43:16,920 --> 00:43:21,250
U l-linja kollu huwa parti mill-kumment,
u tkun xi tkun inti ikteb,

890
00:43:21,250 --> 00:43:24,550
mhuwiex ser ikun
użat għall-kodiċi tiegħek.

891
00:43:24,550 --> 00:43:27,993
Huwa bażikament bħall-kompilatur
se jinjoraw dan.

892
00:43:27,993 --> 00:43:29,290
Does li jagħmel sens?

893
00:43:29,290 --> 00:43:31,710
>> UDJENZA: What do you do darb'oħra
li jikteb kumment?

894
00:43:31,710 --> 00:43:33,260
>> LUCAS FREITAS: Dan?

895
00:43:33,260 --> 00:43:36,020
Il slash mmejla?

896
00:43:36,020 --> 00:43:39,810
Kull meta inti tip slash slash, tkun xi tkun
hija dik il-linja mhux se

897
00:43:39,810 --> 00:43:42,260
li jitqiesu bħala C. Yeah?

898
00:43:42,260 --> 00:43:45,910
>> UDJENZA: Allura wara l-kumment, inti
biss jidħlu u jibdew linja ġdida?

899
00:43:45,910 --> 00:43:47,120
>> LUCAS FREITAS: Yeah, eżattament.

900
00:43:47,120 --> 00:43:50,010
>> Lauren CARVALHO: Il slash slash
huwa għall-kummenti linja waħda.

901
00:43:50,010 --> 00:43:52,910
>> LUCAS FREITAS: Per eżempju,
hawnhekk għandna -

902
00:43:52,910 --> 00:43:54,160
let me zoom -

903
00:43:54,160 --> 00:43:56,530

904
00:43:56,530 --> 00:44:01,180
per eżempju, hawn jien tiddikjara float,
imma forsi jekk inti biss jitqiegħed dan

905
00:44:01,180 --> 00:44:04,980
fil-kodiċi tiegħek, bħal ikollok ebda idea
dak li din qed tagħmel, bħal fil-fatt

906
00:44:04,980 --> 00:44:06,950
xi ħadd li tħares lejn dan il-kodiċi
se tkun, bħal, dak li l-

907
00:44:06,950 --> 00:44:09,190
Heck li qed jiġri?

908
00:44:09,190 --> 00:44:12,890
>> Jekk inti tpoġġi kumment tgħid "convert
Fahrenheit għal Celsius, jagħmel ħafna

909
00:44:12,890 --> 00:44:13,450
aktar sens.

910
00:44:13,450 --> 00:44:15,480
Inti, simili, OK, int
tagħmel konverżjoni.

911
00:44:15,480 --> 00:44:16,730
Does li jagħmel sens?

912
00:44:16,730 --> 00:44:19,860

913
00:44:19,860 --> 00:44:24,960
Allura huwa biss xi ħaġa li jgħin lin-nies
lest kodiċi tiegħek u wkoll tagħmel

914
00:44:24,960 --> 00:44:28,290
inti tkun kapaċi li jorganizzaw
kodiċi tiegħek aħjar.

915
00:44:28,290 --> 00:44:33,080
>> It-tieni ħaġa hija li inti tista 'tagħmel
Kummenti multi-linja, sabiex ikollhom wieħed

916
00:44:33,080 --> 00:44:34,850
jikkummentaw għall-mazz ta 'linji.

917
00:44:34,850 --> 00:44:38,880
Minflok ma jkollhom jitqiegħdu slash slash,
il-kummenti l-ewwel linja, mmejla slash,

918
00:44:38,880 --> 00:44:43,590
it-tieni linja, u l-bqija, inti
jistgħu jużaw l-istilla slash.

919
00:44:43,590 --> 00:44:46,330
Il-mod li inti tagħmel huwa li għall-
ewwel linja tal-kumment, int

920
00:44:46,330 --> 00:44:49,650
se jagħmlu stilla star slash,
hekk biss bħal dik.

921
00:44:49,650 --> 00:44:56,900
Eżatt bħal hawn għandna l-bidu ta '
programm, inti normalment tpoġġi min int

922
00:44:56,900 --> 00:44:59,530
huma, dak li dan il-programm ma,
u għalf bħal dik.

923
00:44:59,530 --> 00:45:01,900
Huwa tip ta 'bħal header
għall-programm.

924
00:45:01,900 --> 00:45:04,540
>> Għal darb'oħra, mhuwiex xi ħaġa li
kompilatur se jimpurtahom, iżda

925
00:45:04,540 --> 00:45:07,570
huwa importanti għalik li tkun taf liema dan
programm ma jew għal persuni oħra

926
00:45:07,570 --> 00:45:09,960
li tkun taf liema program tiegħek qed tagħmel.

927
00:45:09,960 --> 00:45:17,480
Allura inti mmejla star star, u allura l-
aħħar linja int ser jagħmlu star

928
00:45:17,480 --> 00:45:22,250
mmejla li tkun tista 'tagħlaq
li jikkummentaw.

929
00:45:22,250 --> 00:45:26,140
Allura bażikament kollha għall-linji oħra,
inti tista 'biss tikteb xi, u dan

930
00:45:26,140 --> 00:45:27,390
hija kollha se jiġu injorati.

931
00:45:27,390 --> 00:45:32,920

932
00:45:32,920 --> 00:45:37,780
>> U wkoll, eżatt kif stil, tara li
kull waħda mill-linji għandu stilla, u kollha

933
00:45:37,780 --> 00:45:39,380
l-istilel kollha huma allinjati.

934
00:45:39,380 --> 00:45:41,605
Dawn huma affarijiet importanti tant
li kodiċi tiegħek jistenna pretty.

935
00:45:41,605 --> 00:45:42,855
Ħsejjes tajba?

936
00:45:42,855 --> 00:45:45,320

937
00:45:45,320 --> 00:45:47,290
>> Issa, il-kondizzjonijiet.

938
00:45:47,290 --> 00:45:52,240
Liema David kien qal li għandna
attwalment tqiegħed f'dawk slides, huwa li

939
00:45:52,240 --> 00:45:55,810
meta jkollok xi tip ta 'jekk dikjarazzjonijiet
jew kwalunkwe tip ta 'kondizzjonijiet,

940
00:45:55,810 --> 00:46:00,700
għandek tuża ċineg kaboċċi biex juru li
dan huwa dak li kien jiġri

941
00:46:00,700 --> 00:46:02,730
meta jkollok il-kundizzjoni.

942
00:46:02,730 --> 00:46:07,560
Teknikament, meta għandek kundizzjoni
u imbagħad il-linja li jmiss huwa biss wieħed

943
00:46:07,560 --> 00:46:12,110
line, inti ma teknikament jkollhom
li jpoġġi l-braces kaboċċi.

944
00:46:12,110 --> 00:46:16,930
>> Bażikament il-kompilatur jifhem
dan xorta waħda bħala impliċitu.

945
00:46:16,930 --> 00:46:21,100
Iżda għal CS50, aħna nitolbuk guys tpoġġi
l-braces kaboċċi biss hekk li tiegħek

946
00:46:21,100 --> 00:46:24,560
kodiċi hija aktar organizzata
u aktar leġġibbli.

947
00:46:24,560 --> 00:46:28,200
Minħabba li l-kodiċi gets itwal jekk inti
ma jkollhom braces kaboċċi u bħal dawn.

948
00:46:28,200 --> 00:46:29,150
Jiġrilha verament messy.

949
00:46:29,150 --> 00:46:31,410
>> Lauren CARVALHO: Dan huwa eżattament
liema David biss rrilevat

950
00:46:31,410 --> 00:46:33,000
fil slides preċedenti tiegħi.

951
00:46:33,000 --> 00:46:36,690
Huwa definittivament taħdem mingħajr l-kaboċċi
ċingi, iżda għal raġunijiet stilistiċi

952
00:46:36,690 --> 00:46:38,840
aħna qed tmur biex jitolbu li
inti tpoġġi dawk pulzieri

953
00:46:38,840 --> 00:46:42,400
>> U meta tibda taħdem style50,
li huwa tip tal-kontroll 50 għal

954
00:46:42,400 --> 00:46:44,860
stil, se infakkarkom li tagħmel dan.

955
00:46:44,860 --> 00:46:49,710
>> LUCAS FREITAS: U ħaġa oħra huwa
ftakar li jpoġġi l-braces kaboċċi flimkien

956
00:46:49,710 --> 00:46:50,610
f'kull linja.

957
00:46:50,610 --> 00:46:52,490
Allura inti tagħmel, per eżempju, l's.

958
00:46:52,490 --> 00:46:56,910
Mur fil-linja li jmiss, tiftaħ il-kaboċċi
Brace, allura inti tmur għal-linja li jmiss.

959
00:46:56,910 --> 00:46:59,560
Indentazzjoni, li huwa erba 'spazji.

960
00:46:59,560 --> 00:47:03,570
Imbagħad inti tikteb xi, imbagħad ieħor
line, u tagħlaq il-Brace kaboċċi.

961
00:47:03,570 --> 00:47:06,870
Allura jkun żgur li dawk it-tnejn kaboċċi
braces huma fil-linji differenti.

962
00:47:06,870 --> 00:47:11,548
>> UDJENZA: Mela jekk din il-kodiċi kienu simili
10 IFs inkella, dan għandu

963
00:47:11,548 --> 00:47:13,040
jkun ta '10 settijiet ta' parentesi?

964
00:47:13,040 --> 00:47:14,610
>> LUCAS FREITAS: Yeah, għal kull wieħed minnhom.

965
00:47:14,610 --> 00:47:14,930
Yeah.

966
00:47:14,930 --> 00:47:17,980
Mela jekk, inkella jekk, u l-bqija.

967
00:47:17,980 --> 00:47:21,990
>> UDJENZA: Tista mhux
istampa Tab għall-inċiż?

968
00:47:21,990 --> 00:47:25,350
>> LUCAS FREITAS: Aħna qed tistaqsi lilek
guys li jużaw erba 'spazji.

969
00:47:25,350 --> 00:47:30,060
Xi edituri test tittraduċi tab
bħala erba spazji awtomatikament.

970
00:47:30,060 --> 00:47:34,850
gedit ma, hekk ikollok biex
do ispazju ispazju ispazju ispazju.

971
00:47:34,850 --> 00:47:37,920
Dan huwa wkoll xi ħaġa li xi
programmaturi biss tagħmel tabs, li wħud

972
00:47:37,920 --> 00:47:40,560
programmaturi biss tagħmel erba 'spazji,
u xi nies oħra anke jagħmlu

973
00:47:40,560 --> 00:47:41,900
żewġ jew tliet spazji.

974
00:47:41,900 --> 00:47:44,040
Huwa biss li hawnhekk aħna qed tistaqsi
inti guys li jagħmlu erba 'spazji.

975
00:47:44,040 --> 00:47:47,556
>> UDJENZA: Hemm kważi definittivament
ltqajna biex tkun mod għall gedit biex

976
00:47:47,556 --> 00:47:48,645
awtomatikament [inaudible].

977
00:47:48,645 --> 00:47:50,480
Bħall-ebda [inaudible] ma dan.

978
00:47:50,480 --> 00:47:51,150
>> LUCAS FREITAS: Yeah.

979
00:47:51,150 --> 00:47:53,165
Naħseb li inti tista 'tmur Settings.

980
00:47:53,165 --> 00:47:55,270
>> UDJENZA: Huwa diġà ma kollha ta 'dak.

981
00:47:55,270 --> 00:47:56,410
>> LUCAS FREITAS: Huwa diġà ma?

982
00:47:56,410 --> 00:47:56,890
OK.

983
00:47:56,890 --> 00:48:00,854
Hekk biss tkun ċert li inti
jkollhom erba 'spazji.

984
00:48:00,854 --> 00:48:05,880
>> UDJENZA: Do irridu tpoġġi l-kaboċċi
parentesi għal-linji kif ukoll?

985
00:48:05,880 --> 00:48:07,470
>> LUCAS FREITAS: Iva.

986
00:48:07,470 --> 00:48:11,610
>> Lauren CARVALHO: Kull meta tiegħek
siġillar blokk ta 'kodiċi, biss

987
00:48:11,610 --> 00:48:13,570
jekk jogħġbok uża l-braces kaboċċi.

988
00:48:13,570 --> 00:48:18,040
U qabel ma inti taħseb li aħna qed biss
qed sticklers dwar dan għal ebda tajba

989
00:48:18,040 --> 00:48:23,450
raġuni, jekk inti guys do jmorru biex jiksbu
apprendistati teknoloġija fil-kumpaniji kbar,

990
00:48:23,450 --> 00:48:26,020
dawn se jtik gwida stil, u
dawn se jgħidlek dan huwa dak tiegħek

991
00:48:26,020 --> 00:48:27,220
kodiċi teħtieġ lill-dehra.

992
00:48:27,220 --> 00:48:31,120
U anki jekk inti tgħallimt li kodiċi bħal
dan, forsi fil-internship tiegħek

993
00:48:31,120 --> 00:48:32,680
inti ser ikollok tagħmel xi ħaġa
kompletament differenti.

994
00:48:32,680 --> 00:48:35,115
Huma jistennew li inti jikkonformaw
għall-istil tagħhom.

995
00:48:35,115 --> 00:48:39,800
>> LUCAS FREITAS: U ħaġ'oħra huwa
li inti avviż kif i jkollhom bħall-x,

996
00:48:39,800 --> 00:48:42,290
ispazju, inqas, l-ispazju, 0?

997
00:48:42,290 --> 00:48:44,640
Kull meta għandek operatur -

998
00:48:44,640 --> 00:48:50,490
jista 'jkun simili plus, minus, darbiet, inqas,
akbar, ikun x'ikun operatur -

999
00:48:50,490 --> 00:48:57,560
inti għandek tpoġġi spazju fuq ix-xellug
u d-dritt ta 'l-operatur.

1000
00:48:57,560 --> 00:49:00,570
>> Lauren CARVALHO: Dawk huma
imsejħa hom isiru operazzjonijiet matematiċi binarja.

1001
00:49:00,570 --> 00:49:03,720
Just tagħmel żgur li int dejjem ispazju
out hom isiru operazzjonijiet matematiċi binarja tiegħek.

1002
00:49:03,720 --> 00:49:05,465
>> LUCAS FREITAS: Dan huwa
mhux operand binarja.

1003
00:49:05,465 --> 00:49:07,010
>> Lauren CARVALHO: Dan huwa
minħabba li jieħu tnejn.

1004
00:49:07,010 --> 00:49:08,260
>> LUCAS FREITAS: Oh, yeah.

1005
00:49:08,260 --> 00:49:13,340

1006
00:49:13,340 --> 00:49:14,590
>> OK, il-switches.

1007
00:49:14,590 --> 00:49:18,180

1008
00:49:18,180 --> 00:49:23,390
L-ewwel, inti għandek tara li biss bħal
fi stqarrija jekk jew inkella, inti għandek

1009
00:49:23,390 --> 00:49:28,280
li jpoġġi l-Brace kaboċċi fuq il-linja tagħha stess
u taħt il-Brace kaboċċi hawn.

1010
00:49:28,280 --> 00:49:32,240
Avviż li hemm spazju waħdieni
wara swiċċ, eżatt bħal fil jekk u ieħor

1011
00:49:32,240 --> 00:49:35,360
kellna spazju wieħed bejn
dak u l-parentesi.

1012
00:49:35,360 --> 00:49:36,610
Allura inti għandek tpoġġi dan.

1013
00:49:36,610 --> 00:49:40,380

1014
00:49:40,380 --> 00:49:48,270
>> U hemm ebda spazju dritt wara kull
ta 'l-parentesi jew qabel it-tmiem

1015
00:49:48,270 --> 00:49:49,080
ta 'l-parentesi.

1016
00:49:49,080 --> 00:49:52,612
Allura inti tara li dan kollu flimkien,
u wkoll bħal up here.

1017
00:49:52,612 --> 00:49:53,940
>> Yeah?

1018
00:49:53,940 --> 00:49:58,040
>> Lauren CARVALHO: Naħseb
għandna bżonn li jimxu fuq.

1019
00:49:58,040 --> 00:50:02,340
>> LUCAS FREITAS: Allura dan huwa parti mill-
Gwida tal-Istil li inti għandek għall-CS50.

1020
00:50:02,340 --> 00:50:06,520
Kun żgur li tmur cs50.net/style
u tagħti ħarsa lejn dan.

1021
00:50:06,520 --> 00:50:09,250
Dawn huma kollha importanti ħafna
għall-punteġġ istil tiegħek.

1022
00:50:09,250 --> 00:50:12,740

1023
00:50:12,740 --> 00:50:15,670
>> Let me jmorru lura għad-dikjarazzjoni.

1024
00:50:15,670 --> 00:50:17,070
>> Lauren CARVALHO: I d pjuttost
biss użu style50.

1025
00:50:17,070 --> 00:50:18,920
Aħna biss se jmorru
dritti għal loops.

1026
00:50:18,920 --> 00:50:27,580

1027
00:50:27,580 --> 00:50:28,300
Kull dritt.

1028
00:50:28,300 --> 00:50:33,720
>> Mela ejja nikseb lura għall-kontenut, issa
li konna marret fuq il-gwida tal-istil.

1029
00:50:33,720 --> 00:50:37,220
Loops, inti stajt tidher minnhom Scratch, u
aħna qed tmur biex jitkellmu dwarhom fil-

1030
00:50:37,220 --> 00:50:39,210
C.

1031
00:50:39,210 --> 00:50:44,400
>> Fil għat loop, hemm
tliet porzjonijiet għall-

1032
00:50:44,400 --> 00:50:45,440
dikjarazzjoni ta 'dan għal loop.

1033
00:50:45,440 --> 00:50:49,040
You ħadthom ltqajna inizjalizzazzjoni tiegħek
li tissettja varjabbli tiegħek.

1034
00:50:49,040 --> 00:50:52,160
You ħadthom ltqajna kundizzjoni tiegħek, li huma
verifika biex tara jekk xi ħaġa hija

1035
00:50:52,160 --> 00:50:54,670
vera jew falza u jekk il-
loop għandha tkompli.

1036
00:50:54,670 --> 00:50:59,390
U inti stajt ltqajna aġġornament tiegħek, li
Qed taġġorna varjabbli tiegħek.

1037
00:50:59,390 --> 00:51:05,310
>> Ejja biss tagħti ħarsa lejn uħud
Kodiċi C ta 'dan għal loop fl-azzjoni.

1038
00:51:05,310 --> 00:51:08,860
X'qed jiġri huwa hawn fil-
inizjalizzazzjoni, aħna qed jistabbilixxu i għal 0.

1039
00:51:08,860 --> 00:51:11,820
Fil-kondizzjoni aħna qed iċċekkjar
jekk i huwa inqas minn 10.

1040
00:51:11,820 --> 00:51:14,982
U fl-aġġornament aħna qed
inkrementazzjoni i.

1041
00:51:14,982 --> 00:51:20,490
Allura x'se jirriżulta minn
dan għall loop?

1042
00:51:20,490 --> 00:51:24,344
>> LUCAS FREITAS: Attwalment, l-ewwel nett,
Do you guys taf liema i + + huwa?

1043
00:51:24,344 --> 00:51:25,850
>> UDJENZA: Żieda minn 1.

1044
00:51:25,850 --> 00:51:26,870
>> LUCAS FREITAS: Żieda minn 1, iva.

1045
00:51:26,870 --> 00:51:30,020
Allura dan huwa l-istess ħaġa bħat
jagħmlu i huwa ugwali i plus 1.

1046
00:51:30,020 --> 00:51:35,890
U tinnota li aħna ma jkollhomx spazju
bejn il-i u l-+ +.

1047
00:51:35,890 --> 00:51:37,600
>> So do you guys taf liema dan se tagħmel?

1048
00:51:37,600 --> 00:51:39,060
Jista xi ħadd tell me?

1049
00:51:39,060 --> 00:51:41,463
U forsi nikseb xi kandju
minħabba li?

1050
00:51:41,463 --> 00:51:42,912
>> UDJENZA: [inaudible]

1051
00:51:42,912 --> 00:51:44,850
>> LUCAS FREITAS: OK.

1052
00:51:44,850 --> 00:51:45,400
[Inaudible]

1053
00:51:45,400 --> 00:51:47,450
juru kulħadd aktar tard [inaudible].

1054
00:51:47,450 --> 00:51:49,565
Yeah, li għaddej biex juru "Dan
huwa CS50 "10 darbiet.

1055
00:51:49,565 --> 00:51:52,150
>> Lauren CARVALHO: I raden kien
fit-titolu tal-pjastra.

1056
00:51:52,150 --> 00:51:53,830
>> LUCAS FREITAS: Oh, yeah.

1057
00:51:53,830 --> 00:51:54,670
>> [Rires]

1058
00:51:54,670 --> 00:51:56,790
>> LUCAS FREITAS: Li tgħin.

1059
00:51:56,790 --> 00:51:58,370
>> Lauren CARVALHO: Allura dawk
huma għall loops.

1060
00:51:58,370 --> 00:52:03,200
Aħna qed tmur biex tara xi eżempji aktar
ta 'għal-linji aktar tard.

1061
00:52:03,200 --> 00:52:06,510
Imma ejja fatt tagħti ħarsa lejn l-
tieni tip ta 'loop inti ser tiltaqa' ma

1062
00:52:06,510 --> 00:52:08,920
fis-C, u huwa msejjaħ il-linja waqt.

1063
00:52:08,920 --> 00:52:11,120
>> Fil-linja waqt, inti ħadthom
biss ltqajna kundizzjoni.

1064
00:52:11,120 --> 00:52:14,790
Il-kondizzjoni hija vverifikata fil-
bidu, u jekk din il-kundizzjoni

1065
00:52:14,790 --> 00:52:18,450
tevalwa li veru, imbagħad il-kodiċi fi ħdan
il-korp tal-blokka filwaqt

1066
00:52:18,450 --> 00:52:20,380
se tesegwixxi.

1067
00:52:20,380 --> 00:52:23,000
U l-kodiċi se tkompli
tesegwixxi sakemm dak

1068
00:52:23,000 --> 00:52:24,450
kundizzjoni tibqa 'vera.

1069
00:52:24,450 --> 00:52:28,350

1070
00:52:28,350 --> 00:52:33,320
>> Hawn eżempju ta 'loop filwaqt li C.
Aħna ser jistabbilixxu għadd sa 10

1071
00:52:33,320 --> 00:52:34,580
tibda bil.

1072
00:52:34,580 --> 00:52:41,800
Sakemm għadd huwa akbar minn 0,
aħna qed tmur biex iżommu l-istampar out dan

1073
00:52:41,800 --> 00:52:43,360
varjabbli hawn.

1074
00:52:43,360 --> 00:52:47,080
Aħna ser decrement għadd u
mbagħad tiċċekkja l-kundizzjoni darb'oħra.

1075
00:52:47,080 --> 00:52:51,370
Stampa, decrement, check
il-kundizzjoni darb'oħra.

1076
00:52:51,370 --> 00:52:54,530
>> Hawnhekk għandna eżempju li tappartjieni
għall-mistoqsija tiegħek qabel.

1077
00:52:54,530 --> 00:52:57,340
Kellna l-mija s meta konna
istampar string, u issa li

1078
00:52:57,340 --> 00:53:03,420
aħna qed stampar ta 'int, għandna
mija i bħala placeholder tagħna minflok.

1079
00:53:03,420 --> 00:53:09,250
L-ittri kollha għandhom ikunu pretty
intuwittivi, S għall string, i għall-int.

1080
00:53:09,250 --> 00:53:15,400
>> Hekk jekk dan il-kodiċi tesegwixxi, għandek
għadd minn 10 għal 0, stampar

1081
00:53:15,400 --> 00:53:15,925
kull numru sħiħ.

1082
00:53:15,925 --> 00:53:19,460
>> LUCAS FREITAS: U inti tista 'taħseb l-
mija għax iħoss bħal blank

1083
00:53:19,460 --> 00:53:23,960
ispazju, u mbagħad int tqegħid dan
varjabbli hawnhekk f'dak l-ispazju vojt.

1084
00:53:23,960 --> 00:53:27,640
Hekk per eżempju, hawn I se jkollhom biss
vojt, u mbagħad jien tqegħid tal-

1085
00:53:27,640 --> 00:53:30,262
għadd hemm dritt, il-
valur ta 'l-għadd.

1086
00:53:30,262 --> 00:53:32,710
Does li jagħmel sens?

1087
00:53:32,710 --> 00:53:35,860
>> Jista I biss do simili printf
u mbagħad kwotazzjonijiet, l-għadd?

1088
00:53:35,860 --> 00:53:36,840
Would li jaħdmu?

1089
00:53:36,840 --> 00:53:37,980
>> UDJENZA: Le

1090
00:53:37,980 --> 00:53:41,190
>> LUCAS FREITAS: Le, minħabba li se
attwalment jistampaw il-kelma "għadd"

1091
00:53:41,190 --> 00:53:42,850
minflok istampar-valur.

1092
00:53:42,850 --> 00:53:46,080
Din hija kif inti tagħmel jistampaw il-valuri
lejn il-varjabbli minflok

1093
00:53:46,080 --> 00:53:47,670
biss l-isem tal-varjabbli.

1094
00:53:47,670 --> 00:53:48,530
Kwalunkwe mistoqsijiet?

1095
00:53:48,530 --> 00:53:53,060
>> UDJENZA: Għaliex għandek tuża għall-
bħala kuntrarju għall jkunu '?

1096
00:53:53,060 --> 00:53:56,130
>> Lauren CARVALHO: I ser jużaw għal
loop jekk naf eżattament kemm

1097
00:53:56,130 --> 00:53:59,520
iterazzjonijiet I jixtiequ loop tiegħi jiddekorri.

1098
00:53:59,520 --> 00:54:02,810
F'dan il-każ, ma jimpurtax għaliex,
I mean, I kien biss tipprova

1099
00:54:02,810 --> 00:54:05,310
think ta 'verament sempliċi
eżempju ta 'dan slide.

1100
00:54:05,310 --> 00:54:09,990
Imma ejja ngħidu li inti tixtieq xi ħaġa
biex jibqgħu għaddejjin waqt li -

1101
00:54:09,990 --> 00:54:14,480
>> LUCAS FREITAS: Per eżempju, int
titlob għall input sakemm il-persuna

1102
00:54:14,480 --> 00:54:15,370
jagħtik l-input dritt.

1103
00:54:15,370 --> 00:54:19,720
Allura bħall filwaqt li l-input ma jkunx
OK, iżommu tistaqsi għal dan.

1104
00:54:19,720 --> 00:54:22,920
Jew simili waqt li int ġenituri ma jagħtux
flus, iżommu tistaqsi għal dan.

1105
00:54:22,920 --> 00:54:23,430
>> [Rires]

1106
00:54:23,430 --> 00:54:25,390
>> Lauren CARVALHO: Inti ma tafx kif
ħafna drabi inti ser ikollok tagħmel dan.

1107
00:54:25,390 --> 00:54:27,292
>> LUCAS FREITAS: Għaliex inti ma
taf kif ħafna drabi li l-

1108
00:54:27,292 --> 00:54:28,010
ser jibqgħu għaddejjin.

1109
00:54:28,010 --> 00:54:30,397
>> Lauren CARVALHO: Iżda fil-għall-loop,
għandek bżonn tkun taf kif ħafna drabi.

1110
00:54:30,397 --> 00:54:33,640

1111
00:54:33,640 --> 00:54:33,860
Yeah?

1112
00:54:33,860 --> 00:54:38,520
>> UDJENZA: Just biex tiċċara, fil-mija
jgħid din hija xi ħaġa dwar li

1113
00:54:38,520 --> 00:54:42,415
jiġri, l ï għall-eqreb numru sħiħ,
u n backslash -

1114
00:54:42,415 --> 00:54:43,910
>> Lauren CARVALHO: Mezzi?

1115
00:54:43,910 --> 00:54:45,820
Min jaf x'inhu n backslash jfisser?

1116
00:54:45,820 --> 00:54:47,770
Linja l-ġdida, yeah.

1117
00:54:47,770 --> 00:54:48,130
Eżattament.

1118
00:54:48,130 --> 00:54:50,500
>> LUCAS FREITAS: Inti tista 'taħseb
ta 'n bħala linja ġdida.

1119
00:54:50,500 --> 00:54:52,258
>> Lauren CARVALHO: Nizza.

1120
00:54:52,258 --> 00:54:55,775
>> UDJENZA: X'hemm li għadd
sing sing [inaudible]?

1121
00:54:55,775 --> 00:55:00,240
>> LUCAS FREITAS: Għadd nieqes nieqes huwa
l-istess ħaġa bħat plus plus, iżda

1122
00:55:00,240 --> 00:55:02,160
minflok tiżdied,
huwa jonqos minn 1.

1123
00:55:02,160 --> 00:55:04,720

1124
00:55:04,720 --> 00:55:07,185
>> Lauren CARVALHO: Kull aktar
filwaqt mistoqsijiet loop?

1125
00:55:07,185 --> 00:55:09,460
Nru?

1126
00:55:09,460 --> 00:55:13,910
Oh, konna suppost
tinqabeż dik.

1127
00:55:13,910 --> 00:55:14,950
>> Dan huwa do filwaqt loop.

1128
00:55:14,950 --> 00:55:18,950
Simili ħafna għal loop filwaqt ħlief
F'dan il-każ aħna jiċċekkja l-kondizzjoni wara

1129
00:55:18,950 --> 00:55:23,430
il-kodiċi fil-ġisem tal-
loop tesegwixxi darba.

1130
00:55:23,430 --> 00:55:27,170
Allura aħna iwettaq l-kodiċi
ewwel x'ikun.

1131
00:55:27,170 --> 00:55:31,956
Imbagħad aħna jiċċekkja l-kondizzjoni, jesegwixxu
mill-ġdid jekk il-kundizzjoni huwa veru.

1132
00:55:31,956 --> 00:55:35,450

1133
00:55:35,450 --> 00:55:38,950
>> Inti ser issib ruħek li jużaw dan meta
int tistaqsi għall-input utent.

1134
00:55:38,950 --> 00:55:42,080
Għax int dejjem se jkollhom
jistaqsu darba, u mbagħad jiddependi fuq liema

1135
00:55:42,080 --> 00:55:46,570
l-input utent huwa, inti jista 'jkollok
reprompt u jistaqsi għal darb'oħra u għal darb'oħra jekk

1136
00:55:46,570 --> 00:55:50,670
l-input ma kienx dak li
mistenni li jkun.

1137
00:55:50,670 --> 00:55:53,610
>> UDJENZA: Allura huwa simili forma
għan-nies biex jimlew.

1138
00:55:53,610 --> 00:55:56,010
>> Lauren CARVALHO: Yeah, eżattament.

1139
00:55:56,010 --> 00:55:59,720
Inti ser issib, I think, fl-ewwel tiegħek ħafna
Pset, int se jkollhom

1140
00:55:59,720 --> 00:56:04,010
tuża do ukoll loop biex jiġbru
input mill-utent.

1141
00:56:04,010 --> 00:56:08,728
>> UDJENZA: Jiddependi fuq is-sitwazzjoni,
loops waqt tiegħek se tendenza li jimxu aktar

1142
00:56:08,728 --> 00:56:12,805
spiss milli filwaqt loops, bħal
minn wieħed jew xi ħaġa?

1143
00:56:12,805 --> 00:56:14,080
>> Lauren CARVALHO: Jekk huwa l-eżatta -

1144
00:56:14,080 --> 00:56:17,400
>> LUCAS FREITAS: Huma għandhom dejjem jimxu
l-ammont eżatt ta 'drabi li int

1145
00:56:17,400 --> 00:56:19,130
jixtiequ li jimxu.

1146
00:56:19,130 --> 00:56:23,860
Bħal nużaw tagħmel filwaqt għaliex aħna verament
riedu li jiksbu l-input mill-inqas darba.

1147
00:56:23,860 --> 00:56:27,220
Fil loops filwaqt li, xi kultant inti ma tridx
li jiġi esegwit fil-livelli kollha jekk mhuwiex

1148
00:56:27,220 --> 00:56:28,540
il-każ biex tesegwixxi.

1149
00:56:28,540 --> 00:56:31,300
Allura dan jiddependi fuq id-disinn.

1150
00:56:31,300 --> 00:56:35,900
I mean, inti tista 'jew użu tagħmel waqt jew
filwaqt sakemm kodiċi tiegħek ma li

1151
00:56:35,900 --> 00:56:36,905
huwa suppost tagħmel.

1152
00:56:36,905 --> 00:56:38,470
>> Lauren CARVALHO: Imma I do
think it-tweġiba għall tiegħek

1153
00:56:38,470 --> 00:56:40,540
kwistjoni hija probabbilment iva.

1154
00:56:40,540 --> 00:56:42,190
Ejja ngħidu l-kundizzjoni kienet falza.

1155
00:56:42,190 --> 00:56:45,498
F'każ wieħed imur darba, u
F'każ ieħor imur żero darbiet.

1156
00:56:45,498 --> 00:56:47,370
Allura, yeah.

1157
00:56:47,370 --> 00:56:49,260
>> Kwalunkwe mistoqsijiet aktar?

1158
00:56:49,260 --> 00:56:50,320
Iva?

1159
00:56:50,320 --> 00:56:56,443
>> UDJENZA: Jista 'l-kundizzjoni loop jkun
għal loop f'termini ta 'ieħor varjabbli

1160
00:56:56,443 --> 00:56:57,385
minn [inaudible].

1161
00:56:57,385 --> 00:57:01,700
>> Lauren CARVALHO: Yeah,
jista 'jkun xejn.

1162
00:57:01,700 --> 00:57:06,420
Probabbilment għall-Psets bidu, inti
mhux se jkollhom jiltaqgħu il-każ, iżda

1163
00:57:06,420 --> 00:57:09,878
definittivament jista 'jkun xejn.

1164
00:57:09,878 --> 00:57:12,680
>> LUCAS FREITAS: Naħseb
aħna qed isir hawn.

1165
00:57:12,680 --> 00:57:13,290
>> Lauren CARVALHO: Are we?

1166
00:57:13,290 --> 00:57:13,480
Nru?

1167
00:57:13,480 --> 00:57:13,870
>> LUCAS FREITAS: loops?

1168
00:57:13,870 --> 00:57:14,600
Yeah.

1169
00:57:14,600 --> 00:57:16,280
>> Lauren CARVALHO: Aħna m'għandhomx ikunu.

1170
00:57:16,280 --> 00:57:17,760
Oh, aħna qed isir mal loops.

1171
00:57:17,760 --> 00:57:19,250
OK.

1172
00:57:19,250 --> 00:57:23,180
>> Attwalment, għaliex aħna kont qed titkellem hekk
ħafna, ejja fil-fatt kollha jinnavigaw

1173
00:57:23,180 --> 00:57:28,950
quddiem għall study.cs50.net/conditions.

1174
00:57:28,950 --> 00:57:34,460
U int ser jinnaviga isfel
għall-problemi widget.

1175
00:57:34,460 --> 00:57:39,090
Well, attwalment, filwaqt li nies qed jersqu
din twaqqaf, l-Istudju CS50 hija

1176
00:57:39,090 --> 00:57:42,620
ser tkun għodda li t-TFS tiegħek se
jużaw biex jippreparaw għal taqsimiet u li

1177
00:57:42,620 --> 00:57:45,230
inti guys tista 'tuża jekk tinsa sezzjonijiet.

1178
00:57:45,230 --> 00:57:48,980
Huwa ser jinkludi mazz ta 'slides,
xi tips u tricks għal kull

1179
00:57:48,980 --> 00:57:54,030
suġġett, u xi problemi prattika
ma 'soluzzjonijiet.

1180
00:57:54,030 --> 00:57:57,200
>> Għaliex ma kulħadd ħu ħarsa
fuq din il-problema dritt hawn.

1181
00:57:57,200 --> 00:58:01,630

1182
00:58:01,630 --> 00:58:04,790
>> Jien sorry, I għandu jkollhom mfakkra
persuni li jġibu laptops illum.

1183
00:58:04,790 --> 00:58:07,050
Imma jekk inti ma għandekx
a laptop, li OK.

1184
00:58:07,050 --> 00:58:10,140
Tista 'biss LOGHOME din isfel fuq
biċċa karta jew tfittex fuq

1185
00:58:10,140 --> 00:58:12,890
ispalla proxxmu tiegħek.

1186
00:58:12,890 --> 00:58:16,380
>> Ejja nippruvaw u jikteb programm li
iqajjem l-utent li tieħu raden, il-

1187
00:58:16,380 --> 00:58:19,250
numru medju ta 'tfal għal kull familja
unit fl-Istati Uniti.

1188
00:58:19,250 --> 00:58:22,265
Dak in-numru huwa 2, mill-mod, kif inti
tista 'tara minn dawn l-eżempji.

1189
00:58:22,265 --> 00:58:24,770

1190
00:58:24,770 --> 00:58:29,030
>> Aħna rridu li jistampa numru medju ta '
tfal għal kull familja fl-Istati Uniti, allura aħna

1191
00:58:29,030 --> 00:58:31,080
trid liema?

1192
00:58:31,080 --> 00:58:35,480
Aħna rridu li jiġbru input
mill-utent.

1193
00:58:35,480 --> 00:58:41,290
U mbagħad jiddependi fuq dak l-utent
input huwa, int ser jistampa

1194
00:58:41,290 --> 00:58:44,850
jew tapplika din hija korretta
jew dan huwa żbaljat.

1195
00:58:44,850 --> 00:58:48,040
>> U l-ewwel ħaġa li tkun taf
tara, jekk tikklikkja-vleġġa ftit fil

1196
00:58:48,040 --> 00:58:52,190
il-qiegħ tal-widget problema hija
post biex LOGHOME stabbiliti xi pseudocode.

1197
00:58:52,190 --> 00:58:53,340
Allura int mhux programmazzjoni għadu.

1198
00:58:53,340 --> 00:58:56,740
Int biss jkollna tiegħek
ideat fl-ordni.

1199
00:58:56,740 --> 00:58:59,620
>> Hawn xi ħadd li jixtiequ jgħinu Lucas
toħroġ bi dritt

1200
00:58:59,620 --> 00:59:01,270
pseudocode għal din il-problema?

1201
00:59:01,270 --> 00:59:04,900
>> LUCAS FREITAS: X'inhi l-ewwel ħaġa
li għandna probabbilment jagħmlu hawn?

1202
00:59:04,900 --> 00:59:07,010
What do think inti guys?

1203
00:59:07,010 --> 00:59:08,260
>> UDJENZA: [inaudible]

1204
00:59:08,260 --> 00:59:12,060

1205
00:59:12,060 --> 00:59:13,290
>> LUCAS FREITAS: Yeah, OK.

1206
00:59:13,290 --> 00:59:16,610
Allura, print.

1207
00:59:16,610 --> 00:59:19,480
Biss jgħidu l-istampar din il-medja
numru ta 'nies?

1208
00:59:19,480 --> 00:59:20,470
OK.

1209
00:59:20,470 --> 00:59:23,450
Kwistjoni Stampa, ejja ngħidu.

1210
00:59:23,450 --> 00:59:25,951
Wara I Stampa din il-kwistjoni,
x'għandi nagħmel?

1211
00:59:25,951 --> 00:59:27,875
>> UDJENZA: Get input.

1212
00:59:27,875 --> 00:59:30,690
>> LUCAS FREITAS: Get input.

1213
00:59:30,690 --> 00:59:32,864
Xi ħaġa oħra?

1214
00:59:32,864 --> 00:59:34,114
>> UDJENZA: Kundizzjoni.

1215
00:59:34,114 --> 00:59:36,770

1216
00:59:36,770 --> 00:59:38,980
>> LUCAS FREITAS: Kundizzjoni.

1217
00:59:38,980 --> 00:59:41,325
>> Lauren CARVALHO: X'inhu li
kondizzjoni ser tkun?

1218
00:59:41,325 --> 00:59:43,550
>> UDJENZA: In-numru ta '[inaudible].

1219
00:59:43,550 --> 00:59:44,440
>> Lauren CARVALHO: Dritt.

1220
00:59:44,440 --> 00:59:46,945
>> LUCAS FREITAS: Allura dak am I ser
kontroll fil-kundizzjoni?

1221
00:59:46,945 --> 00:59:48,750
>> UDJENZA: Jekk ugwali 2.

1222
00:59:48,750 --> 00:59:50,640
>> Lauren CARVALHO: Jekk ugwali 2.

1223
00:59:50,640 --> 00:59:51,890
Eżattament.

1224
00:59:51,890 --> 00:59:58,340

1225
00:59:58,340 --> 01:00:00,140
>> LUCAS FREITAS: Hemm xi ħaġa
ħaġa oħra li I għandha tagħmel?

1226
01:00:00,140 --> 01:00:01,390
>> UDJENZA: Count.

1227
01:00:01,390 --> 01:00:05,184

1228
01:00:05,184 --> 01:00:08,110
>> LUCAS FREITAS: Mela jekk huwa
daqs 2, ejja ngħidu -

1229
01:00:08,110 --> 01:00:14,250

1230
01:00:14,250 --> 01:00:17,960
let me biss jiktbu jekk input ugwali
għal 2, allura dak li jien ser

1231
01:00:17,960 --> 01:00:23,665
tagħmel huwa print korretta.

1232
01:00:23,665 --> 01:00:26,230

1233
01:00:26,230 --> 01:00:31,826
U mbagħad inkella, jien ser
li jistampaw żbaljata.

1234
01:00:31,826 --> 01:00:34,600

1235
01:00:34,600 --> 01:00:37,720
Xi ħaġa oħra?

1236
01:00:37,720 --> 01:00:38,670
Nru?

1237
01:00:38,670 --> 01:00:40,500
>> Lauren CARVALHO: Allura inti
tista 'tikklikkja fuq il -

1238
01:00:40,500 --> 01:00:42,290
kulħadd ma jkollhom din isfel?

1239
01:00:42,290 --> 01:00:44,680
>> LUCAS FREITAS: Jagħmel sens?

1240
01:00:44,680 --> 01:00:46,226
Allura issa ejja tipprova għall-kodiċi dan.

1241
01:00:46,226 --> 01:00:50,140
>> Lauren CARVALHO: Jekk inti ikklikkja l-ftit
vleġġa, attwalment jiffranka tiegħek

1242
01:00:50,140 --> 01:00:51,900
pseudocode, li huwa verament eċċitanti.

1243
01:00:51,900 --> 01:00:56,480
U inti tista 'tagħmel dawk fis kummenti jekk
inti tixtieq sempliċiment biex tfakkar lilek innifsek ta '

1244
01:00:56,480 --> 01:00:57,075
x'għandek tagħmel.

1245
01:00:57,075 --> 01:01:01,555
>> LUCAS FREITAS: Hekk per eżempju, l-ewwel
Jien ser jistampaw il-kwistjoni, hekk

1246
01:01:01,555 --> 01:01:05,930
kif am I se tagħmel dan, fil-fatt?

1247
01:01:05,930 --> 01:01:07,050
printf.

1248
01:01:07,050 --> 01:01:12,130
Allura printf, u l-kwistjoni huwa medju
numru ta 'tfal għal kull

1249
01:01:12,130 --> 01:01:14,110
familja fl-Istati Uniti.

1250
01:01:14,110 --> 01:01:19,070

1251
01:01:19,070 --> 01:01:21,790
>> Imbagħad jien ser tikseb
input mill-utent.

1252
01:01:21,790 --> 01:01:29,050

1253
01:01:29,050 --> 01:01:31,324
Allura kif nista 'nagħmlu?

1254
01:01:31,324 --> 01:01:32,200
>> UDJENZA: Get Int.

1255
01:01:32,200 --> 01:01:33,076
>> Lauren CARVALHO: GetInt.

1256
01:01:33,076 --> 01:01:33,890
>> LUCAS FREITAS: OK.

1257
01:01:33,890 --> 01:01:35,220
Allura l-ewwel tiddikjara, right?

1258
01:01:35,220 --> 01:01:39,300
int, ejja sejħa hija n ugwali GetInt.

1259
01:01:39,300 --> 01:01:42,610

1260
01:01:42,610 --> 01:01:44,670
>> U issa l-kundizzjoni.

1261
01:01:44,670 --> 01:01:49,250
So let me ngħid li jien ser
hawn check risposta.

1262
01:01:49,250 --> 01:01:57,290
Allura l-ewwel, jekk input, li huwa n, ugwali
li - kif jien ser jikteb li?

1263
01:01:57,290 --> 01:01:58,480
>> UDJENZA: Equal ugwali.

1264
01:01:58,480 --> 01:02:00,000
>> LUCAS FREITAS: Perfect.

1265
01:02:00,000 --> 01:02:00,670
Allura n.

1266
01:02:00,670 --> 01:02:04,600
U tinnota li nagħmel spazju,
ugwali, ugwali, l-ispazju, vera.

1267
01:02:04,600 --> 01:02:06,930
U issa x'għandi nagħmel?

1268
01:02:06,930 --> 01:02:08,820
Xi ħaġa importanti ħafna għall-istil.

1269
01:02:08,820 --> 01:02:10,070
Il-braces kaboċċi.

1270
01:02:10,070 --> 01:02:16,570

1271
01:02:16,570 --> 01:02:17,795
>> U allura jien ser jistampaw.

1272
01:02:17,795 --> 01:02:19,790
Kif nista jistampaw?

1273
01:02:19,790 --> 01:02:22,500
printf.

1274
01:02:22,500 --> 01:02:24,568
>> UDJENZA: Jista 'jkun kapitalizzat?

1275
01:02:24,568 --> 01:02:27,166

1276
01:02:27,166 --> 01:02:28,380
>> LUCAS FREITAS: Le

1277
01:02:28,380 --> 01:02:31,000
Huwa suppost li tkun kollha zghar.

1278
01:02:31,000 --> 01:02:32,250
Allura li hija korretta.

1279
01:02:32,250 --> 01:02:40,990

1280
01:02:40,990 --> 01:02:44,870
>> Would dan biżżejjed għall-printf
dikjarazzjoni, jew jien xi ħaġa nieqsa?

1281
01:02:44,870 --> 01:02:46,265
>> UDJENZA: Linja ġdida.

1282
01:02:46,265 --> 01:02:50,220
>> LUCAS FREITAS: Linja ġdida, yeah.

1283
01:02:50,220 --> 01:02:51,250
U issa ieħor.

1284
01:02:51,250 --> 01:02:57,290
>> UDJENZA: Hemm spazju
wara l-printf, jew le?

1285
01:02:57,290 --> 01:03:00,820
>> Lauren CARVALHO: Aħna għandhom
jivverifika l-gwida tal-istil.

1286
01:03:00,820 --> 01:03:02,260
>> UDJENZA: Ma għandu jkun.

1287
01:03:02,260 --> 01:03:03,510
>> LUCAS FREITAS: m'għandhomx ikunu, OK.

1288
01:03:03,510 --> 01:03:05,820

1289
01:03:05,820 --> 01:03:13,605
Allura inkella, printf, "Dan huwa żbaljat."

1290
01:03:13,605 --> 01:03:17,105
>> Lauren CARVALHO: Oops, kwotazzjonijiet tiegħek.

1291
01:03:17,105 --> 01:03:17,950
>> LUCAS FREITAS: OK.

1292
01:03:17,950 --> 01:03:18,600
Xi ħaġa oħra?

1293
01:03:18,600 --> 01:03:20,770
Ma tfittex tajba?

1294
01:03:20,770 --> 01:03:21,890
>> Lauren CARVALHO: nistgħu jippruvaw dan?

1295
01:03:21,890 --> 01:03:23,190
>> LUCAS FREITAS: Yeah, ejja run.

1296
01:03:23,190 --> 01:03:25,880

1297
01:03:25,880 --> 01:03:29,070
Allura huwa kumpilazzjoni, u
Jidher li taħdem.

1298
01:03:29,070 --> 01:03:31,465
Ejja nippruvaw żewġt itfal.

1299
01:03:31,465 --> 01:03:34,110
Dan huwa korrett.

1300
01:03:34,110 --> 01:03:37,300
U issa ejja darb'oħra, iżda issa minflok
ta 'tqegħid żewġt itfal, ejja

1301
01:03:37,300 --> 01:03:40,990
ngħid li jien ser tpoġġi bħal ħamsa.

1302
01:03:40,990 --> 01:03:41,515
Li hija żbaljata.

1303
01:03:41,515 --> 01:03:42,670
Għalhekk jidher li taħdem.

1304
01:03:42,670 --> 01:03:44,160
>> Lauren CARVALHO: Għaliex ma inti juru lilhom
x'jiġri jekk inti tpoġġi xi ħaġa

1305
01:03:44,160 --> 01:03:45,055
stramb, bħal xi ittri.

1306
01:03:45,055 --> 01:03:45,790
>> LUCAS FREITAS: Oh, yeah.

1307
01:03:45,790 --> 01:03:47,430
Ejja ukoll jivverifikaw li.

1308
01:03:47,430 --> 01:03:51,170
X'jiġri jekk l-utent qed tipprova mess
bil program tiegħek, u huma biss

1309
01:03:51,170 --> 01:03:57,430
jiktbu, I do not know tnejn.

1310
01:03:57,430 --> 01:03:58,320
Li għaddej biex ngħid retry.

1311
01:03:58,320 --> 01:04:00,780
>> Lauren CARVALHO: So GetInt
hija talbithom biex retry.

1312
01:04:00,780 --> 01:04:02,115
Aħna ma għandek tieħu kura
ta 'dak nfusna.

1313
01:04:02,115 --> 01:04:02,750
>> LUCAS FREITAS: Yeah.

1314
01:04:02,750 --> 01:04:06,853
Hekk sakemm I attwalment tpoġġi numru, huwa
ser iżommu tistaqsi lili biex retry.

1315
01:04:06,853 --> 01:04:08,330
>> UDJENZA: Kif sirt run?

1316
01:04:08,330 --> 01:04:10,570
>> LUCAS FREITAS: Agħfas
din il-buttuna stilla.

1317
01:04:10,570 --> 01:04:11,940
>> Lauren CARVALHO: Inti għandek tmur up.

1318
01:04:11,940 --> 01:04:13,320
Hemm inti tmur.

1319
01:04:13,320 --> 01:04:15,550
>> LUCAS FREITAS: L-istilla
buttuna dritt hemmhekk.

1320
01:04:15,550 --> 01:04:16,040
Yeah?

1321
01:04:16,040 --> 01:04:19,960
>> UDJENZA: Ma pront [inaudible]
ma 'numri deċimali wisq?

1322
01:04:19,960 --> 01:04:21,235
>> Lauren CARVALHO: Nemmen li se.

1323
01:04:21,235 --> 01:04:22,660
>> LUCAS FREITAS: Jekk ma dak?

1324
01:04:22,660 --> 01:04:24,990
>> Lauren CARVALHO: Jekk dawn it-tip
f'numru ta 'informazzjoni, I think

1325
01:04:24,990 --> 01:04:25,880
li għaddej biex fil-pront.

1326
01:04:25,880 --> 01:04:26,586
>> LUCAS FREITAS: Ejja naraw.

1327
01:04:26,586 --> 01:04:28,360
>> Lauren CARVALHO: Minħabba
Huwa mhux int.

1328
01:04:28,360 --> 01:04:32,056

1329
01:04:32,056 --> 01:04:33,442
>> LUCAS FREITAS: Yeah.

1330
01:04:33,442 --> 01:04:37,370
>> Lauren CARVALHO: Allura huwa mhuwiex ta 'int,
Get Int se jgħidlek biex retry.

1331
01:04:37,370 --> 01:04:40,795
>> UDJENZA: Għalhekk, fejn f'dak il-kodiċi tkun
il-post deċimali li tinkoraġġixxi l-

1332
01:04:40,795 --> 01:04:46,005
utent li huma għandhom jidħlu
integer speċifikament?

1333
01:04:46,005 --> 01:04:48,480
>> Lauren CARVALHO: GetInt huwa attwalment
tagħmel dan għalina.

1334
01:04:48,480 --> 01:04:50,600
>> UDJENZA: Le, I tfisser jekk ridna
li jidħlu [inaudible]

1335
01:04:50,600 --> 01:04:55,070
>> LUCAS FREITAS: Tista 'tgħid bħall-medja
numru ta 'tfal fl-Istati Uniti.

1336
01:04:55,070 --> 01:04:56,120
I do not know.

1337
01:04:56,120 --> 01:05:01,761
Nistgħu ngħidu, per eżempju, "Jekk jogħġbok
input numru sħiħ. "

1338
01:05:01,761 --> 01:05:04,270
>> Lauren CARVALHO: Integer ugwali
għan-numru medju.

1339
01:05:04,270 --> 01:05:06,190
I mean, huwa kemm
inti kelma hija, right?

1340
01:05:06,190 --> 01:05:06,520
>> LUCAS FREITAS: Yeah.

1341
01:05:06,520 --> 01:05:08,420
Dan mhuwiex parti mill attwalment kodifikazzjoni.

1342
01:05:08,420 --> 01:05:11,000
Huwa aktar ta 'prodotti simili x'ikun
int tmur jridu

1343
01:05:11,000 --> 01:05:13,987
jikteb fil-programm tiegħek.

1344
01:05:13,987 --> 01:05:17,723
>> UDJENZA: Kif aħna run jekk
kien effettivament fil gedit [inaudible].

1345
01:05:17,723 --> 01:05:19,130
Minflok ippressar play?

1346
01:05:19,130 --> 01:05:21,180
>> LUCAS FREITAS: Aħna se
ewwel josservawha.

1347
01:05:21,180 --> 01:05:25,080
Nistgħu nagħmlu dan billi tagħmel make
u l-isem tal-fajl.

1348
01:05:25,080 --> 01:05:29,896
U mbagħad run, aħna ser nagħmlu dot mmejla
u l-isem tal-programm.

1349
01:05:29,896 --> 01:05:36,588
>> UDJENZA: I raden dak I fisser kien jekk
ridna-programm li jirrispondu għal

1350
01:05:36,588 --> 01:05:42,010
żbaljata, dħul invalida tagħhom,
inti m'għandekx tpoġġi fil -

1351
01:05:42,010 --> 01:05:45,710
>> LUCAS FREITAS: Aħna mhux se tkun tista '
tagħmel dan minħabba li l-kodiċi dan jgħid

1352
01:05:45,710 --> 01:05:50,350
retry ġej minn Get Int li huwa
funzjoni li hija diġà implimentata

1353
01:05:50,350 --> 01:05:55,790
għalina permezz tal-librerija CS50, u peress li
huwa diġà implimentat hemmhekk, aħna

1354
01:05:55,790 --> 01:05:58,340
tista 'mhux biss [inaudible].

1355
01:05:58,340 --> 01:06:00,780
>> Lauren CARVALHO: Jekk inti ma tuża
GetInt, allura inti tista 'tagħmel dan.

1356
01:06:00,780 --> 01:06:01,490
>> LUCAS FREITAS: Yeah.

1357
01:06:01,490 --> 01:06:03,750
Imma jekk inti qed tuża GetInt, inti ma tistax.

1358
01:06:03,750 --> 01:06:05,427
Kwalunkwe mistoqsijiet oħra?

1359
01:06:05,427 --> 01:06:12,938
>> UDJENZA: Jista ikollok marret ma simili
GetFloat u mbagħad ikunu jistgħu jitqiegħdu

1360
01:06:12,938 --> 01:06:14,381
dan fil-deċimali?

1361
01:06:14,381 --> 01:06:15,343
>> LUCAS FREITAS: Yeah.

1362
01:06:15,343 --> 01:06:15,824
>> UDJENZA: OK.

1363
01:06:15,824 --> 01:06:19,210
Imbagħad inti biss tista 'input
float ugwali -

1364
01:06:19,210 --> 01:06:19,950
>> Lauren CARVALHO: Yeah.

1365
01:06:19,950 --> 01:06:22,740
Eżattament l-istess ħlief
float minflok int.

1366
01:06:22,740 --> 01:06:27,372
>> LUCAS FREITAS: Just poġġih hawn
u mbagħad GetFloat hemmhekk.

1367
01:06:27,372 --> 01:06:29,795
>> UDJENZA: Kif inti se
tara jew raw -

1368
01:06:29,795 --> 01:06:31,327
>> Lauren CARVALHO: għandna
ma gotten wasalniex.

1369
01:06:31,327 --> 01:06:36,490
>> UDJENZA: - tagħmel inugwaljanza ma
sufruni ma [inaudible]

1370
01:06:36,490 --> 01:06:40,290
>> UDJENZA: X'inhi tagħmel l-semicolons jfisser?

1371
01:06:40,290 --> 01:06:43,220
>> Lauren CARVALHO: Il semicolon biss
ifisser li din id-dikjarazzjoni hija kompleta,

1372
01:06:43,220 --> 01:06:45,030
u aħna qed tmur biex tmur
fuq il-slide li jmiss.

1373
01:06:45,030 --> 01:06:47,040
>> UDJENZA: Allura huwa meħtieġ
kull darba?

1374
01:06:47,040 --> 01:06:48,330
>> Lauren CARVALHO: Yeah.

1375
01:06:48,330 --> 01:06:53,130
Well, OK, u għalhekk mhux għal dawn il-kondizzjonijiet,
għaliex qed

1376
01:06:53,130 --> 01:06:54,090
siġillar xi ħaġa.

1377
01:06:54,090 --> 01:07:00,290
Allura bażikament jekk xi ħaġa qed jikkawża
inti mbagħad toħloq Brace kaboċċi

1378
01:07:00,290 --> 01:07:03,000
blokk, ma jpoġġux virgola
fl-aħħar.

1379
01:07:03,000 --> 01:07:04,200
>> LUCAS FREITAS: Imma kollox
inkella, iva.

1380
01:07:04,200 --> 01:07:06,670
Meta inti finitura dikjarazzjoni,
tpoġġi l-virgola.

1381
01:07:06,670 --> 01:07:10,380
U jekk tinsa semicolons, il-
kompilatur għaddej biex nikseb rrabjata fi inti,

1382
01:07:10,380 --> 01:07:12,640
u int se jkollhom
biex tipprova li tiffissa lilha.

1383
01:07:12,640 --> 01:07:16,520
>> Lauren CARVALHO: Jekk nressaq virgola
hawnhekk, li twaqqaf dan, u I

1384
01:07:16,520 --> 01:07:18,780
qatt se tikseb biex tesegwixxi x'hemm
ġewwa, mill-mod.

1385
01:07:18,780 --> 01:07:21,113
Allura huwa wieħed minn dawk bugs komuni.

1386
01:07:21,113 --> 01:07:22,390
>> UDJENZA: Dejjem esekuzzjoni.

1387
01:07:22,390 --> 01:07:22,950
>> Lauren CARVALHO: Yeah.

1388
01:07:22,950 --> 01:07:25,860
F'dan il-każ, aħna dejjem
tesegwixxi x'hemm ġewwa.

1389
01:07:25,860 --> 01:07:29,050
>> UDJENZA: istil Your [inaudible]
ehmeż dan għalik, ħsibt.

1390
01:07:29,050 --> 01:07:29,802
>> Lauren CARVALHO: Oh, dan huwa veru.

1391
01:07:29,802 --> 01:07:34,298
>> UDJENZA: [inaudible] wieħed
Ħaġa line [inaudible]

1392
01:07:34,298 --> 01:07:35,286
>> UDJENZA: Iva?

1393
01:07:35,286 --> 01:07:37,756
>> UDJENZA: Jista ikollok multiple
inputs fil-linja waħda?

1394
01:07:37,756 --> 01:07:41,214
Allura bħal inti tista 'tistaqsi lill-utenti
li jistampaw żewġ affarijiet?

1395
01:07:41,214 --> 01:07:42,530
>> Lauren CARVALHO: Mhux użu -

1396
01:07:42,530 --> 01:07:44,520
>> LUCAS FREITAS: Le

1397
01:07:44,520 --> 01:07:47,040
Ejja ngħidu li Nixtieq ukoll
biex tikseb dan numru sħiħ m.

1398
01:07:47,040 --> 01:07:49,558
I għandek tagħmel dan fil-linja differenti.

1399
01:07:49,558 --> 01:07:54,992
>> UDJENZA: Jekk ġejt biex tmexxi
li, kif [inaudible]?

1400
01:07:54,992 --> 01:07:59,438
Ikun jistampa fil-pront
hemm [inaudible]

1401
01:07:59,438 --> 01:08:00,940
u mbagħad youd tidħol waħda u -

1402
01:08:00,940 --> 01:08:01,840
>> Lauren CARVALHO: Well, run.

1403
01:08:01,840 --> 01:08:04,365
I mean, hemm xejn waqfien us minn
biss running dan u jaraw dak

1404
01:08:04,365 --> 01:08:06,610
jiġri.

1405
01:08:06,610 --> 01:08:08,080
>> LUCAS FREITAS: Naħseb li huwa
ser jilmenta fil us

1406
01:08:08,080 --> 01:08:08,977
għaliex aħna ma tkunx qed tużah -

1407
01:08:08,977 --> 01:08:09,751
>> Lauren CARVALHO: Oops.

1408
01:08:09,751 --> 01:08:12,580
>> LUCAS FREITAS: Huwa lmenta fil us dritt
issa għaliex aħna mhux qed jużaw dan

1409
01:08:12,580 --> 01:08:21,640
varjabbli, imma jekk jien ma, per eżempju,
n huwa ugwali ugwali għal, u m ugwali

1410
01:08:21,640 --> 01:08:26,849
ugwali għal, allura x'se
jiġri f'dan il-każ?

1411
01:08:26,849 --> 01:08:28,830
X'għandu dan il-programm do?

1412
01:08:28,830 --> 01:08:30,330
>> UDJENZA: Jien biss jistaqsi
kif kieku -

1413
01:08:30,330 --> 01:08:31,550
>> Lauren CARVALHO: Hija biss trid
tkun taf kif jidher

1414
01:08:31,550 --> 01:08:34,189
simili, I think, right?

1415
01:08:34,189 --> 01:08:36,819
Għalhekk hija ħadet wieħed minnhom, u mbagħad
hija ħadet it-tieni wieħed.

1416
01:08:36,819 --> 01:08:41,279

1417
01:08:41,279 --> 01:08:43,069
>> I think we għandhom jimxu fuq,
għaliex aħna għandna waħda aktar

1418
01:08:43,069 --> 01:08:44,689
slide juru li jmorru qabel -

1419
01:08:44,689 --> 01:08:46,269
tridu li pull up matematika?

1420
01:08:46,269 --> 01:08:47,558
>> LUCAS FREITAS: Yeah, matematika.

1421
01:08:47,558 --> 01:09:00,033

1422
01:09:00,033 --> 01:09:02,206
>> Lauren CARVALHO: Agħti
me biss sekonda.

1423
01:09:02,206 --> 01:09:07,390

1424
01:09:07,390 --> 01:09:14,260
>> Hemm numerika differenti ftit
varjabbli fil data C. numeriku C

1425
01:09:14,260 --> 01:09:18,130
jistgħu jiġu kklassifikati f'tipi differenti,
u dawn huma dawk li inti ser

1426
01:09:18,130 --> 01:09:19,570
tara l-aktar spiss.

1427
01:09:19,570 --> 01:09:20,910
>> U int hija numru sħiħ.

1428
01:09:20,910 --> 01:09:23,189
Ma jistax ikollok xi deċimali.

1429
01:09:23,189 --> 01:09:27,754
Fil-Appliance, hija tieħu
32 bits biex jaħżnu int.

1430
01:09:27,754 --> 01:09:30,450
>> A float jista 'jkollhom deċimali.

1431
01:09:30,450 --> 01:09:34,330
Hija tikkunsidra wkoll 32 bits biex jaħżnu
float fil-Appliance.

1432
01:09:34,330 --> 01:09:42,270
>> A doppja huwa numru bi deċimali
punt li jieħu 64 bits biex jaħżnuh,

1433
01:09:42,270 --> 01:09:44,470
li jfisser li inti tista 'biss ikollhom
preċiżjoni akbar minħabba

1434
01:09:44,470 --> 01:09:46,426
inti jista 'jkollhom aktar -

1435
01:09:46,426 --> 01:09:47,785
dak li inti sejħa hija?

1436
01:09:47,785 --> 01:09:48,640
>> LUCAS FREITAS: Yeah, li l-aktar.

1437
01:09:48,640 --> 01:09:52,140
>> Lauren CARVALHO: Aktar postijiet
wara l-punt deċimali.

1438
01:09:52,140 --> 01:09:57,140
U twil twil hija numru sħiħ
li jieħu 64 bits għal

1439
01:09:57,140 --> 01:09:58,395
huwa uġigħ fil-Appliance.

1440
01:09:58,395 --> 01:10:00,278
>> LUCAS FREITAS: Allura jista 'jkun
akbar minn ints jista 'jkun.

1441
01:10:00,278 --> 01:10:03,320

1442
01:10:03,320 --> 01:10:08,380
>> Lauren CARVALHO: Il-ħaġa dwar data
tipi fil C huwa li dawn jgħidulek x'għandek

1443
01:10:08,380 --> 01:10:11,050
tip ta 'data tista' taħżen
fil-varjabbli tiegħek.

1444
01:10:11,050 --> 01:10:15,860
Huma jgħidulek kif tista 'tuża din il-
varjabbli fil-programm tiegħek.

1445
01:10:15,860 --> 01:10:19,650
Huwa importanti ħafna li biss iżommu rekord
ta 'liema tip data inti qed tuża, u jekk

1446
01:10:19,650 --> 01:10:23,070
għandek bżonn tagħmel biex jitfa minn tip ta 'data
għall-ieħor, tagħmel żgur li int taf

1447
01:10:23,070 --> 01:10:25,250
eżattament dak li jiġri meta dik
casting sseħħ.

1448
01:10:25,250 --> 01:10:28,520
U tkun taf tara eżempju aktar tard
fuq f'dawn slides ta '

1449
01:10:28,520 --> 01:10:31,490
żball li tista 'sseħħ.

1450
01:10:31,490 --> 01:10:35,300
>> Ejja tagħti ħarsa lejn xi matematika fl C u
taħseb verament b'attenzjoni, I raden,

1451
01:10:35,300 --> 01:10:38,470
dwar x'inhu għaddej meta dan
matematika qed iseħħ.

1452
01:10:38,470 --> 01:10:43,552
Fl-ewwel linja, x'hemm
jiġri meta Niddikjara x?

1453
01:10:43,552 --> 01:10:48,921
>> UDJENZA: Inti tippermetti
x li tkun xi ħaġa?

1454
01:10:48,921 --> 01:10:49,700
>> Lauren CARVALHO: Yeah.

1455
01:10:49,700 --> 01:10:54,040
Well, jien verament tistaqsi l operattiva
sistema għal 32 bits ta 'memorja, right?

1456
01:10:54,040 --> 01:10:57,890
F'liema I jista 'jaħżen l-int, u
Jien ser sejħa li int x.

1457
01:10:57,890 --> 01:11:01,370
>> LUCAS FREITAS: Bażikament tmur fil-memorja
u jsibu post li għandu 32

1458
01:11:01,370 --> 01:11:05,290
bits u qal, ħej, I jridu dan l-ispazju,
u li għaddej biex jiġu msejħa x.

1459
01:11:05,290 --> 01:11:08,590
Allura int konstatazzjoni biss pretty ħafna
kaxxa fil-memorja tiegħek biex

1460
01:11:08,590 --> 01:11:10,440
Valuri maħżen għal x.

1461
01:11:10,440 --> 01:11:13,980
>> Lauren CARVALHO: U mbagħad I initialize
x, li jfisser li jien biss jaħżnu l-

1462
01:11:13,980 --> 01:11:20,270
valur ta '2 f'dak il-post, li chunk
tal-memorja, li staqsejna operattiva

1463
01:11:20,270 --> 01:11:21,860
sistema għall.

1464
01:11:21,860 --> 01:11:25,090
U stabbiliti hawn dak li aħna qed tagħmel huwa
aħna qed attwalment tiddikjara u

1465
01:11:25,090 --> 01:11:29,060
initializing y f'linja waħda minflok
f'żewġ linji bħal għamilna up hawn,

1466
01:11:29,060 --> 01:11:33,960
li hija wkoll perfettament multa, Aħna
żżid 1 sa x, u aħna qed ħażna li

1467
01:11:33,960 --> 01:11:34,950
valur y.

1468
01:11:34,950 --> 01:11:39,360
>> LUCAS FREITAS: Allura bażikament dak li dan
linja ma, issib issa kaxxa għall y,

1469
01:11:39,360 --> 01:11:41,990
u mbagħad il-valur tagħha, il-ħaġa li
int ser tpoġġi ġewwa l-kaxxa, hija

1470
01:11:41,990 --> 01:11:43,800
se jkun il-valur ta 'x plus 1.

1471
01:11:43,800 --> 01:11:45,850
Allura dan ikollu din il-kaxxa għall-y.

1472
01:11:45,850 --> 01:11:49,980
Jiġrilha l-valur ta 'x, jistenna
hawn, u ara li huwa 2.

1473
01:11:49,980 --> 01:11:53,035
Poġġih hemmhekk, flimkien ma '1, so
hija tpoġġi 3 hemmhekk.

1474
01:11:53,035 --> 01:11:54,290
Does li jagħmel sens?

1475
01:11:54,290 --> 01:11:55,780
Allura y tkun 2 f'dan il-każ.

1476
01:11:55,780 --> 01:11:58,993

1477
01:11:58,993 --> 01:12:00,770
>> Lauren CARVALHO: Kull dritt, berred.

1478
01:12:00,770 --> 01:12:06,010
Rajna xi żieda, so ejja issa think
dwar diviżjoni C. Hawnhekk jien

1479
01:12:06,010 --> 01:12:11,490
tiddikjara u initializing float
imsejħa tweġiba u jiġi diviż 1 minn 10,

1480
01:12:11,490 --> 01:12:14,860
u mbagħad jien istampar ir-risposta
sa żewġ postijiet deċimali.

1481
01:12:14,860 --> 01:12:18,800
U nota hawn, fid-dikjarazzjoni printf tiegħi,
meta I tixtieq li jistampaw xi ħaġa għal tnejn

1482
01:12:18,800 --> 01:12:25,600
postijiet deċimali,% .2 f huwa
dak I trid tuża.

1483
01:12:25,600 --> 01:12:28,880

1484
01:12:28,880 --> 01:12:31,760
Għalhekk il-punt 2 huwa biss qal
I bżonn żewġ postijiet wara l-

1485
01:12:31,760 --> 01:12:34,980
informazzjoni stampata.

1486
01:12:34,980 --> 01:12:38,740
>> Issa, dak li jiġri
jekk I run dan il-kodiċi?

1487
01:12:38,740 --> 01:12:40,500
Ħadd ma jkollu idea?

1488
01:12:40,500 --> 01:12:42,721
X'għandu jistampa?

1489
01:12:42,721 --> 01:12:45,010
>> LUCAS FREITAS: Liema huma
nistennew li tikseb.

1490
01:12:45,010 --> 01:12:46,810
>> Lauren CARVALHO: What do
irridu, qabel kollox?

1491
01:12:46,810 --> 01:12:48,871
>> LUCAS FREITAS: [inaudible]

1492
01:12:48,871 --> 01:12:51,120
>> Lauren CARVALHO: 0.1, yeah.

1493
01:12:51,120 --> 01:12:52,325
Imma dak se jistampa?

1494
01:12:52,325 --> 01:12:53,275
>> UDJENZA: [inaudible]

1495
01:12:53,275 --> 01:12:56,760
>> Lauren CARVALHO: Well, no, attwalment.

1496
01:12:56,760 --> 01:13:01,400
Dan huwa dak I kien jitkellem dwar għaliex inti
bżonn li jżommu rekord attent ħafna ta '

1497
01:13:01,400 --> 01:13:02,550
tipi ta 'data tiegħek.

1498
01:13:02,550 --> 01:13:05,000
Allura, liema tip ta 'data huwa dan?

1499
01:13:05,000 --> 01:13:06,250
Huwa int, right?

1500
01:13:06,250 --> 01:13:07,600
M'hemm l-ebda post deċimali.

1501
01:13:07,600 --> 01:13:08,770
10 huwa wkoll int.

1502
01:13:08,770 --> 01:13:09,930
M'hemm l-ebda post deċimali.

1503
01:13:09,930 --> 01:13:15,770
>> Jekk I jaqsam l int minn int, I nikseb
int li mhuwiex 0.1, għaliex ints

1504
01:13:15,770 --> 01:13:18,630
ma jistax ikollhom postijiet deċimali, imma biss 0.

1505
01:13:18,630 --> 01:13:21,005
Għax int biss taqta '
off-postijiet deċimali.

1506
01:13:21,005 --> 01:13:24,280
>> LUCAS FREITAS: Allura meta inti tagħmel
operazzjonijiet ma 'ints, int ser

1507
01:13:24,280 --> 01:13:25,990
tikseb int bħala r-risposta.

1508
01:13:25,990 --> 01:13:28,930
Allura bażikament, dak il-kompjuter
qed tagħmel, huwa jaqsam 1 minn

1509
01:13:28,930 --> 01:13:31,520
10, u jiġrilha 0.1.

1510
01:13:31,520 --> 01:13:34,870
Imma allura huwa simili, stenna, dan huwa
suppost li tkun numru sħiħ, sabiex inti biss

1511
01:13:34,870 --> 01:13:37,045
jinjora l-0.1, dan huwa issa biss 0.

1512
01:13:37,045 --> 01:13:41,782
>> Lauren CARVALHO: Allura meta I Stampa din il-
out, I nikseb 0.00 minflok 0.10.

1513
01:13:41,782 --> 01:13:44,075
>> LUCAS FREITAS: Does li jagħmel sens?

1514
01:13:44,075 --> 01:13:45,530
>> Lauren CARVALHO: Dak it-tip
tal sfortunati, right?

1515
01:13:45,530 --> 01:13:47,290
>> LUCAS FREITAS: Allura kif nistgħu jiffissaw dan?

1516
01:13:47,290 --> 01:13:48,620
>> Lauren CARVALHO: Ejja
jippruvaw u jiffissaw dak.

1517
01:13:48,620 --> 01:13:51,570

1518
01:13:51,570 --> 01:13:54,810
Hawn eżempju ta 'fejn jien
attwalment tefa 'l-1

1519
01:13:54,810 --> 01:13:56,650
u l-10 li sufruni.

1520
01:13:56,650 --> 01:13:58,800
Allura issa, 1 m'għadhiex int.

1521
01:13:58,800 --> 01:14:00,020
1 huwa float.

1522
01:14:00,020 --> 01:14:02,590
Mill-mod, dan huwa biss il-sintassi
għal meta inti tixtieq li jitfa minn wieħed

1523
01:14:02,590 --> 01:14:03,410
tip ta 'data għall-ieħor.

1524
01:14:03,410 --> 01:14:07,140
Tista 'biss jitqiegħed il-tip ta' data fil-
parentesi u jkollhom biss li jippreċedi

1525
01:14:07,140 --> 01:14:10,860
il-valur li int ikkastjar.

1526
01:14:10,860 --> 01:14:15,800
>> So here, jien diviż a float minn
float biex tikseb tweġiba float.

1527
01:14:15,800 --> 01:14:19,535
U iva, din fil-
fatt jistampaw 0.10.

1528
01:14:19,535 --> 01:14:20,470
Does li jagħmel sens?

1529
01:14:20,470 --> 01:14:24,110
>> LUCAS FREITAS: Allura casting tip huwa biss
konverżjoni minn tip għall-ieħor.

1530
01:14:24,110 --> 01:14:29,460
Allura float 1 huwa attwalment 1.000.

1531
01:14:29,460 --> 01:14:33,400
Mhux eżattament dan, imma hija xi ħaġa
ma 'postijiet deċimali

1532
01:14:33,400 --> 01:14:34,715
li huwa attwalment 1.

1533
01:14:34,715 --> 01:14:35,960
Does li jagħmel sens?

1534
01:14:35,960 --> 01:14:36,260
Yeah?

1535
01:14:36,260 --> 01:14:40,990
>> UDJENZA: X'jiġri jekk inti ma risposta float
jegwalja 1.0 maqsum f'10?

1536
01:14:40,990 --> 01:14:43,940
>> Lauren CARVALHO: Inti attwalment għaddejjin
biex tara li fil-slide li jmiss.

1537
01:14:43,940 --> 01:14:47,150
Li l-fatt slide ħafna li jmiss tagħna.

1538
01:14:47,150 --> 01:14:50,740
Dan huwa attwalment nicer minn
tip casting, I think.

1539
01:14:50,740 --> 01:14:53,470
Allura dawn it-tnejn huma floats biss billi
natura tal-fatt li huma

1540
01:14:53,470 --> 01:14:54,926
jkollhom postijiet deċimali.

1541
01:14:54,926 --> 01:14:55,300
Iva?

1542
01:14:55,300 --> 01:14:57,670
>> UDJENZA: X'jiġri jekk inti għamilt [inaudible]

1543
01:14:57,670 --> 01:14:59,480
maqsum f'10?

1544
01:14:59,480 --> 01:15:02,270
>> Lauren CARVALHO: Attwalment float
maqsuma minn int attwalment jagħtik

1545
01:15:02,270 --> 01:15:03,670
float, b'tali mod li tkun taħdem multa.

1546
01:15:03,670 --> 01:15:08,070

1547
01:15:08,070 --> 01:15:09,120
>> Stenna, kulħadd ma jifhmu dan?

1548
01:15:09,120 --> 01:15:12,720
Minħabba din se tkun verament
big deal fil Pset1, attwalment.

1549
01:15:12,720 --> 01:15:13,130
Iva?

1550
01:15:13,130 --> 01:15:14,762
>> UDJENZA: Tista 'biss malajr
jmorru fuq il-parti l-ħamra?

1551
01:15:14,762 --> 01:15:16,380
>> Lauren CARVALHO: Il-parti l-ħamra, yeah.

1552
01:15:16,380 --> 01:15:17,250
Lucas, tridu?

1553
01:15:17,250 --> 01:15:18,020
>> LUCAS FREITAS: OK.

1554
01:15:18,020 --> 01:15:20,570
Mela ftakar li l-mija
huwa placeholder.

1555
01:15:20,570 --> 01:15:22,150
Huwa simili spazju vojt.

1556
01:15:22,150 --> 01:15:26,240
Mela ejja jipprova jifhem kollox
li għaddej hawn.

1557
01:15:26,240 --> 01:15:28,170
Mija ifisser li huwa placeholder.

1558
01:15:28,170 --> 01:15:33,640
Imbagħad għandek il-f, li jfisser li
dan placeholder hija għal float.

1559
01:15:33,640 --> 01:15:38,870
L-aħħar ħaġa li għandna hawnhekk hija
.2, Li jfisser I jridu li jkollhom żewġ

1560
01:15:38,870 --> 01:15:42,410
postijiet deċimali għall-float.

1561
01:15:42,410 --> 01:15:48,510
>> Jekk I biss kellhom% f, dawn se tpoġġi
mazz ta 'postijiet deċimali.

1562
01:15:48,510 --> 01:15:54,170
So I tista 'biss jitqiegħed 0.2 jew 0.1 jew 0.5, jew
tkun xi tkun, u li għaddej biex iqiegħed dak

1563
01:15:54,170 --> 01:15:55,950
numru ta 'postijiet deċimali.

1564
01:15:55,950 --> 01:15:59,950
L-unika ħaġa hija li jekk inti tpoġġi simili
.100 Jew .1,000, mhuwiex fil-fatt

1565
01:15:59,950 --> 01:16:04,200
se timplimenta dawk kollha postijiet deċimali
minħabba li ma jkollhom memorja biżżejjed

1566
01:16:04,200 --> 01:16:06,432
li jkollhom dik preċiżjoni.

1567
01:16:06,432 --> 01:16:07,955
>> Kwalunkwe mistoqsijiet oħra?

1568
01:16:07,955 --> 01:16:08,450
Yeah?

1569
01:16:08,450 --> 01:16:12,970
>> UDJENZA: Allura float biss tippermetti
inti tmur lil hinn interi?

1570
01:16:12,970 --> 01:16:13,720
>> LUCAS FREITAS: Iva.

1571
01:16:13,720 --> 01:16:17,345
>> Lauren CARVALHO: Well, a float biss
jippermettilek li jkollhom postijiet deċimali.

1572
01:16:17,345 --> 01:16:20,460
>> LUCAS FREITAS: Dan ifisser biss li inti
issa jistgħu jkollhom numri deċimali.

1573
01:16:20,460 --> 01:16:25,728
>> UDJENZA: Għaliex kieku aħna
Qatt tuża interi?

1574
01:16:25,728 --> 01:16:27,870
>> LUCAS FREITAS: Għaliex kieku
tuża interi?

1575
01:16:27,870 --> 01:16:31,810
Forsi jekk int jingħaddu 0-10,
inti tixtieq li tuża attwalment integer.

1576
01:16:31,810 --> 01:16:33,370
Inti ma għandekx bżonn li jużaw float.

1577
01:16:33,370 --> 01:16:35,430
F'xi sitwazzjonijiet, inti ma
jkollhom fil-fatt -

1578
01:16:35,430 --> 01:16:37,040
>> Lauren CARVALHO: Forsi inti
ma jridux deċimali.

1579
01:16:37,040 --> 01:16:38,600
>> LUCAS FREITAS: Forsi inti ma
tixtieq li tuża float.

1580
01:16:38,600 --> 01:16:42,660
>> Lauren CARVALHO: Il-ħaġa oħra hija,
ftakar, kemm tpoġġi float u int

1581
01:16:42,660 --> 01:16:46,170
jieħu 32 bits biex jaħżnu minnhom, u forsi
inti ma tridx li l-iskart bits fuq il-

1582
01:16:46,170 --> 01:16:48,062
postijiet deċimali.

1583
01:16:48,062 --> 01:16:49,750
>> LUCAS FREITAS: Yeah.

1584
01:16:49,750 --> 01:16:51,910
Allura simili, biss jaħsbu dwar dan.

1585
01:16:51,910 --> 01:16:55,200
Inti għandek 32 bits kemm
ta int u float.

1586
01:16:55,200 --> 01:16:59,400
Għal int, dawk kollha 32 bits
mur għall-parti numru sħiħ.

1587
01:16:59,400 --> 01:17:03,460
Jekk tuża float 32 bits, inti
għandhom il-parti ta 'dan il-memorja qed jintużaw

1588
01:17:03,460 --> 01:17:06,820
għan-numru, għall-numru sħiħ,
u l-parti l-oħra li jintużaw għall-

1589
01:17:06,820 --> 01:17:08,300
postijiet deċimali.

1590
01:17:08,300 --> 01:17:12,370
Allura dan ifisser li inti ma tistax tikseb
għadd kbir ħafna b'sufruni minħabba

1591
01:17:12,370 --> 01:17:16,020
l-float li diġà jużaw ħafna ta '
memorja għall-postijiet deċimali.

1592
01:17:16,020 --> 01:17:17,014
Yeah?

1593
01:17:17,014 --> 01:17:21,487
>> UDJENZA: Li-ewwel risposta,
x'inhi eżattament dan tagħmel?

1594
01:17:21,487 --> 01:17:25,214
Huwa iffissar tal-valur tal-float ugwali
għal dak placeholder għal li inti tista '

1595
01:17:25,214 --> 01:17:26,954
ifakkar fil-linja li jmiss?

1596
01:17:26,954 --> 01:17:28,942
Hija tgħid float risposta.

1597
01:17:28,942 --> 01:17:29,770
>> LUCAS FREITAS: Yeah.

1598
01:17:29,770 --> 01:17:37,200
Għalhekk, tweġiba float ifisser li inti qed jkollna
issa barmil ftit fil-memorja li

1599
01:17:37,200 --> 01:17:40,050
jkollha float, u li għaddej
li għandu jissejjaħ risposta.

1600
01:17:40,050 --> 01:17:42,040
Allura dak hu tweġiba float ma.

1601
01:17:42,040 --> 01:17:44,720
>> U allura inti tgħid li ġewwa ta '
dan, int se timplimenta

1602
01:17:44,720 --> 01:17:46,470
ir-riżultat ta 'dan.

1603
01:17:46,470 --> 01:17:52,610
Allura inti qed tmur biex tagħmel 1.0 diviż bil-
10.0, ikollok 0.1, u mbagħad ma tqiegħed

1604
01:17:52,610 --> 01:17:53,490
li ġewwa ta 'risposta.

1605
01:17:53,490 --> 01:17:57,540
>> Lauren CARVALHO: Allura f'linja waħda, aħna qed
tiddikjara u initializing dan float

1606
01:17:57,540 --> 01:18:00,070
imsejħa risposta.

1607
01:18:00,070 --> 01:18:04,470
>> LUCAS FREITAS: Interessanti, għalkemm
dan huwa biss linja waħda, huwa qed jagħmel

1608
01:18:04,470 --> 01:18:05,570
operazzjonijiet multipli.

1609
01:18:05,570 --> 01:18:08,800
Huwa biss mod ta 'kiri C
tuża inqas kodiċi.

1610
01:18:08,800 --> 01:18:12,310
Huwa l-istess ħaġa bħall-ternarji
operatur, kif inti tista 'biss tagħmel

1611
01:18:12,310 --> 01:18:13,810
[Inaudible] f'linja waħda.

1612
01:18:13,810 --> 01:18:18,860
Huwa fil-fatt jagħmlu l-istess ħaġa bħat
tagħmel tweġiba float, virgola, u

1613
01:18:18,860 --> 01:18:23,060
allura tweġiba ugwali dan, iżda minflok
tagħmel inti tagħmel żewġ linji għall-li,

1614
01:18:23,060 --> 01:18:24,160
huwa simili shortcut.

1615
01:18:24,160 --> 01:18:24,520
Yeah?

1616
01:18:24,520 --> 01:18:27,929
>> UDJENZA: Mela jekk inti dam dan,
ikun 0.10?

1617
01:18:27,929 --> 01:18:30,120
>> LUCAS FREITAS: Iva.

1618
01:18:30,120 --> 01:18:30,530
Yeah?

1619
01:18:30,530 --> 01:18:34,540
>> UDJENZA: Huwa twieġeb attwalment kodiċi,
jew hija biss l-isem?

1620
01:18:34,540 --> 01:18:36,010
>> Lauren CARVALHO: Dan
huwa attwalment kodiċi.

1621
01:18:36,010 --> 01:18:37,750
Dan huwa dak li aħna qed tmur
biex insemmu varjabbli tagħna.

1622
01:18:37,750 --> 01:18:39,770
>> UDJENZA: Allura huwa biss
isem [inaudible].

1623
01:18:39,770 --> 01:18:40,270
>> Lauren CARVALHO: Yeah.

1624
01:18:40,270 --> 01:18:44,670
I setgħet qal float x ugwali 1.0.

1625
01:18:44,670 --> 01:18:47,160
>> LUCAS FREITAS: Il-ħaġa hija li
l-isem tal-varjabbli

1626
01:18:47,160 --> 01:18:48,400
xi ħaġa li inti tuża.

1627
01:18:48,400 --> 01:18:49,690
Huwa importanti għalik.

1628
01:18:49,690 --> 01:18:52,660
Għall-programm attwali, l-unika ħaġa
li kwistjonijiet huwa l-valur li inti

1629
01:18:52,660 --> 01:18:55,570
jkollhom ġewwa tal-barmil.

1630
01:18:55,570 --> 01:18:59,270
Ir-raġuni għaliex għandek varjabbli u
ismijiet tal-varjabbli hija tant youd taf

1631
01:18:59,270 --> 01:19:01,910
dak li qed jittrattaw ma ', bħall-
liema tip ta 'data int

1632
01:19:01,910 --> 01:19:03,040
aċċess fi żmien.

1633
01:19:03,040 --> 01:19:07,580
Iżda għall-kodiċi nnifsu, jekk inti sejħa
it twieġeb jew mistoqsija jew xejn,

1634
01:19:07,580 --> 01:19:09,530
pretty ħafna, ma jimpurtax.

1635
01:19:09,530 --> 01:19:10,060
Ma jimpurtax.

1636
01:19:10,060 --> 01:19:12,910
Sakemm int konsistenti f'kull
okkorrenza dan u għalhekk inti sejħa hija

1637
01:19:12,910 --> 01:19:13,620
xi ħaġa oħra.

1638
01:19:13,620 --> 01:19:14,880
Yeah?

1639
01:19:14,880 --> 01:19:17,208
>> UDJENZA: Do-varjabbli
jmorru lil hinn mill-funzjoni?

1640
01:19:17,208 --> 01:19:20,902
Simili jekk ġejt biex toħloq bracket
[Inaudible], tista 'biss

1641
01:19:20,902 --> 01:19:21,806
[Inaudible] jwieġbu mill-ġdid?

1642
01:19:21,806 --> 01:19:22,550
>> Lauren CARVALHO: Le

1643
01:19:22,550 --> 01:19:23,300
>> UDJENZA: [inaudible]

1644
01:19:23,300 --> 01:19:24,200
>> Lauren CARVALHO: Le

1645
01:19:24,200 --> 01:19:26,930
Dan ikun barra mill-ambitu
dan il-varjabbli partikolari.

1646
01:19:26,930 --> 01:19:29,940
U fil-fatt, li tip ta '
interessanti, għaliex meta għandna

1647
01:19:29,940 --> 01:19:33,010
affarijiet bħal ħoloq jew dawn jekk
kondizzjonijiet, jekk inti tiddikjara varjabbli

1648
01:19:33,010 --> 01:19:36,330
fi ħdan sett ieħor ta 'ċingi kaboċċi,
dan jeżisti verament biss

1649
01:19:36,330 --> 01:19:39,800
fi ħdan dawk braces kaboċċi.

1650
01:19:39,800 --> 01:19:43,088
>> UDJENZA: aħħar nota waħda dwar
l-sufruni [inaudible].

1651
01:19:43,088 --> 01:19:46,076
Għaliex kieku inti qatt tixtieq li tuża ints?

1652
01:19:46,076 --> 01:19:49,562
Dan huwa aktar ta 'nota tal-ġenb minn
xejn, imma kompjuter tiegħek huwa

1653
01:19:49,562 --> 01:19:53,048
b'mod sinifikanti aħjar fil-tqandil ints
milli huwa fil-floats tqandil.

1654
01:19:53,048 --> 01:19:55,040
Huwa simili ordni ta '
kobor aktar malajr.

1655
01:19:55,040 --> 01:20:00,360
Mela jekk aħna biss trattati biss sufruni,
affarijiet se jkun ħafna aktar kajman.

1656
01:20:00,360 --> 01:20:03,080
>> Lauren CARVALHO: Attwalment, jidher
tkun problema b'sufruni.

1657
01:20:03,080 --> 01:20:06,400
>> LUCAS FREITAS: Tip ta 'r-raġuni għal
li, inti tista 'taħseb, huwa kif fil-binarju

1658
01:20:06,400 --> 01:20:08,480
inti tista 'tirrappreżenta interi
billi 0 u 1 ta.

1659
01:20:08,480 --> 01:20:09,980
>> Lauren CARVALHO: C'est
il-ħaġa li jmiss.

1660
01:20:09,980 --> 01:20:10,480
>> LUCAS FREITAS: OK.

1661
01:20:10,480 --> 01:20:10,740
Tal-biża '.

1662
01:20:10,740 --> 01:20:11,480
>> Lauren CARVALHO: Just
istiva li ħasbu.

1663
01:20:11,480 --> 01:20:13,800
>> LUCAS FREITAS: OK, I ser
jgħidlek aktar tard.

1664
01:20:13,800 --> 01:20:16,920
>> Lauren CARVALHO: Qabel ma nikbru għal dak
Lucas kien biss qal, operatur

1665
01:20:16,920 --> 01:20:17,420
preċedenza.

1666
01:20:17,420 --> 01:20:18,220
Dan huwa sens komun.

1667
01:20:18,220 --> 01:20:20,830
You guys għamlu dan biżżejjed.

1668
01:20:20,830 --> 01:20:24,705
Għalhekk, biss jekk xi ħaġa huwa fil-parentesi,
se jiġri l-ewwel.

1669
01:20:24,705 --> 01:20:27,970
Huwa multiplikazzjoni tieħu preċedenza
aktar minn hekk,

1670
01:20:27,970 --> 01:20:30,330
tnaqqis, affarijiet bħal dik.

1671
01:20:30,330 --> 01:20:34,700
Allura fil-fatt, biss ma kull min jixtiequ li
tell me liema numru wieħed fil-fatt

1672
01:20:34,700 --> 01:20:36,674
jevalwa sa?

1673
01:20:36,674 --> 01:20:37,638
>> UDJENZA: 27.

1674
01:20:37,638 --> 01:20:39,090
>> Lauren CARVALHO: 27?

1675
01:20:39,090 --> 01:20:39,550
Yeah.

1676
01:20:39,550 --> 01:20:41,975
>> LUCAS FREITAS: Ħalli nagħtikom
ħelu lin-nies.

1677
01:20:41,975 --> 01:20:42,850
>> Lauren CARVALHO: Kull dritt.

1678
01:20:42,850 --> 01:20:44,100
What about numru tnejn?

1679
01:20:44,100 --> 01:20:46,880

1680
01:20:46,880 --> 01:20:48,340
What about numru tnejn?

1681
01:20:48,340 --> 01:20:49,280
>> UDJENZA: 22.

1682
01:20:49,280 --> 01:20:50,680
>> Lauren CARVALHO: 22, yeah.

1683
01:20:50,680 --> 01:20:51,570
I do not know li ltqajna dak.

1684
01:20:51,570 --> 01:20:52,694
Numru tlieta?

1685
01:20:52,694 --> 01:20:54,050
>> UDJENZA: 10.

1686
01:20:54,050 --> 01:20:55,300
>> Lauren CARVALHO: 10, iva.

1687
01:20:55,300 --> 01:20:58,150

1688
01:20:58,150 --> 01:20:58,490
Kessaħ.

1689
01:20:58,490 --> 01:21:01,280
Allura modulo.

1690
01:21:01,280 --> 01:21:03,700
Lucas, tridu biex jispjegaw modulo?

1691
01:21:03,700 --> 01:21:07,150
>> LUCAS FREITAS: Modulo huwa dan l-operatur
li huwa attwalment utli ħafna għal

1692
01:21:07,150 --> 01:21:09,470
mazz ta 'problemi.

1693
01:21:09,470 --> 01:21:15,270
Jekk I do 55 modulo 10, x'tagħmel
dan ejja ngħidu li nixtieq li

1694
01:21:15,270 --> 01:21:16,970
jaqsam 55 permezz 10.

1695
01:21:16,970 --> 01:21:18,240
What do I nirċievi?

1696
01:21:18,240 --> 01:21:21,380
Hija tħoss bħad jekk jien attwalment biss
tagħmel id-diviżjoni, liema huwa l-

1697
01:21:21,380 --> 01:21:22,450
ewwel darba li sibt l-eqreb numru sħiħ?

1698
01:21:22,450 --> 01:21:23,190
>> UDJENZA: 5.

1699
01:21:23,190 --> 01:21:24,080
>> LUCAS FREITAS: 5.

1700
01:21:24,080 --> 01:21:26,230
U allura l-bqija huwa 5, id-dritt?

1701
01:21:26,230 --> 01:21:29,250
Allura huwa simili 5 darbiet 10 plus 5.

1702
01:21:29,250 --> 01:21:35,570
Bażikament, dak modulo ma, tipprova
jaqsam dan in-numru minn dan wieħed, u

1703
01:21:35,570 --> 01:21:37,440
jara x'inhi l-bqija
tad-diviżjoni.

1704
01:21:37,440 --> 01:21:40,080
>> Lauren CARVALHO: Allura huwa biss
jirritorna l-bqija.

1705
01:21:40,080 --> 01:21:41,920
Allura numru wieħed huwa dak?

1706
01:21:41,920 --> 01:21:42,560
5.

1707
01:21:42,560 --> 01:21:43,336
Numru tnejn?

1708
01:21:43,336 --> 01:21:44,150
>> UDJENZA: 3.

1709
01:21:44,150 --> 01:21:44,934
>> Lauren CARVALHO: 3.

1710
01:21:44,934 --> 01:21:46,240
Numru tlieta?

1711
01:21:46,240 --> 01:21:47,190
0.

1712
01:21:47,190 --> 01:21:48,410
U erba huwa 1.

1713
01:21:48,410 --> 01:21:48,665
Eżattament.

1714
01:21:48,665 --> 01:21:49,915
>> LUCAS FREITAS: Sempliċi, right?

1715
01:21:49,915 --> 01:21:54,270

1716
01:21:54,270 --> 01:21:56,560
>> Lauren CARVALHO: Għaliex ma we skip dan
sempliċiment għaliex aħna ma verament ikollhom

1717
01:21:56,560 --> 01:21:59,780
time, u n-nies jidhru li jifhmu.

1718
01:21:59,780 --> 01:22:03,330
Allura hawn hu dak Lucas kien
biss jitkellem dwar.

1719
01:22:03,330 --> 01:22:08,030
>> LUCAS FREITAS: Raġuni oħra għaliex I
tuża ints minflok tal-flowts huwa

1720
01:22:08,030 --> 01:22:10,840
li sufruni huma impreċiż ħafna.

1721
01:22:10,840 --> 01:22:12,720
U għaliex dawn huma impreċiżi?

1722
01:22:12,720 --> 01:22:17,140
David qal li biex jirrappreżentaw integer,
per eżempju, nużaw 0 u

1723
01:22:17,140 --> 01:22:17,810
1 ta, right?

1724
01:22:17,810 --> 01:22:22,370
U allura inti bażikament tagħmel l-
multiplikazzjoni, do dawk kollha

1725
01:22:22,370 --> 01:22:30,000
operazzjonijiet li jkunu jafu liema informazzjoni numru
inti għandek minflok il-binarju.

1726
01:22:30,000 --> 01:22:33,040
>> X'jiġri issa jekk nipprova
tpoġġi punti deċimali?

1727
01:22:33,040 --> 01:22:37,680
Attwalment, per eżempju, jekk ikolli
in-numru bħal 3.33333?

1728
01:22:37,680 --> 01:22:40,250
Hija tħoss bħal 10 aktar minn 3.

1729
01:22:40,250 --> 01:22:44,950
Kif jien ser taħżen l-
3 huwa li għandi wara li?

1730
01:22:44,950 --> 01:22:47,120
Huwa tassew diffiċli, id-dritt?

1731
01:22:47,120 --> 01:22:49,580
Inti ma tistax biss tell il-kompjuter,
ħej, I jkollhom 3, u

1732
01:22:49,580 --> 01:22:50,520
allura inti tagħmel dan għal dejjem.

1733
01:22:50,520 --> 01:22:52,810
Attwalment il-kompjuter mhuwiex
intelliġenti biżżejjed għal dan.

1734
01:22:52,810 --> 01:22:58,300
>> Allura bażikament l-kompjuter tiegħek ma huwa
li tipprova tpoġġi kif ħafna ċifri kif

1735
01:22:58,300 --> 01:23:00,950
din tista 'sa l-memorja li għandek.

1736
01:23:00,950 --> 01:23:05,890
Mela ejja ngħidu li huwa għaddej biex
jgħidu 3.3333, u thats it.

1737
01:23:05,890 --> 01:23:10,690
Għalhekk mhuwiex kapaċi biex effettivament jesprimu
preċiżament dak li float huwa.

1738
01:23:10,690 --> 01:23:13,240
>> Lauren CARVALHO: Għandna numru finit
ta 'bits, li jfisser li mhux

1739
01:23:13,240 --> 01:23:17,910
kull numru deċimali se tkun
jistgħu jkunu rappreżentati b'mod preċiż.

1740
01:23:17,910 --> 01:23:24,910
U hekk f'dan l-eżempju, jekk irridu
istampar 0.1, aħna qed issa istampar

1741
01:23:24,910 --> 01:23:26,475
minn 20 postijiet.

1742
01:23:26,475 --> 01:23:30,250
>> LUCAS FREITAS: Eżatt bħal I kien javżak
inti guys, inti tista 'tpoġġi kwalunkwe numru.

1743
01:23:30,250 --> 01:23:36,520
Imma jekk inti biss għamlet iż-żewġ postijiet,
youd tikseb 0.10, imma jekk inti tpoġġi 20

1744
01:23:36,520 --> 01:23:43,630
postijiet, li għaddej biex nuruk mazz
ta 's għaliex dan huwa dak li inti tista' tpoġġi

1745
01:23:43,630 --> 01:23:45,720
fil-memorja, id-dritt?

1746
01:23:45,720 --> 01:23:48,800
>> Iżda dritt hawn, sal-0,
u mbagħad hija biss jitqiegħed a

1747
01:23:48,800 --> 01:23:50,030
mazz ta 'numri bl-addoċċ.

1748
01:23:50,030 --> 01:23:52,590
Dan huwa tip ta 'bħal uħud -

1749
01:23:52,590 --> 01:23:56,190
>> Lauren CARVALHO: Dan huwa għaliex aħna qed
mhux kapaċi li jirrappreżenta dan deċimali

1750
01:23:56,190 --> 01:23:58,320
preċiżament bin-numru
ta 'bits għandna.

1751
01:23:58,320 --> 01:23:59,730
>> LUCAS FREITAS: U allura l-
kompjuter hija bażikament

1752
01:23:59,730 --> 01:24:01,470
giving you numru Trash.

1753
01:24:01,470 --> 01:24:04,530
Dan mhuwiex effettivament il-
valur tan-numru.

1754
01:24:04,530 --> 01:24:08,242
>> UDJENZA: Huwa qrib kemm
hija tista 'tikseb [inaudible]

1755
01:24:08,242 --> 01:24:09,613
tuża l-[inaudible].

1756
01:24:09,613 --> 01:24:12,685

1757
01:24:12,685 --> 01:24:18,830
>> Lauren CARVALHO: Allura l-implikazzjoni ta '
dan hija li ejja ngħidu li minflok

1758
01:24:18,830 --> 01:24:27,680
jkunu 0.100014, tkun xi tkun,
dak jekk kien 0.0999 -

1759
01:24:27,680 --> 01:24:30,470
ukoll, OK.

1760
01:24:30,470 --> 01:24:38,280
Ejja nippretendu li r-risposta attwali
li dan kien 0.9999999.

1761
01:24:38,280 --> 01:24:40,740
C'est qrib ħafna għal 1, iżda
mhuwiex eżattament 1.

1762
01:24:40,740 --> 01:24:42,840
Huwa 0.99999.

1763
01:24:42,840 --> 01:24:48,140
>> Dan ifisser li jekk I jieħdu dik 0.999,
u I mitfugħa għal int, I nikseb 0.

1764
01:24:48,140 --> 01:24:49,460
I ma jsibux 1.

1765
01:24:49,460 --> 01:24:53,050
>> LUCAS FREITAS: Minħabba ftakar, ikkastjar
minn float li int, inti biss

1766
01:24:53,050 --> 01:24:54,880
jinjora l-postijiet deċimali.

1767
01:24:54,880 --> 01:24:56,400
Inti biss tinjorahom.

1768
01:24:56,400 --> 01:25:00,170
M'hemm l-ebda ħaġa bħal arrotondament
jew running stabbiliti meta inti typecast.

1769
01:25:00,170 --> 01:25:03,310
Attwalment, hemm din il-funzjoni li
ma arrotondament, li huwa ferm

1770
01:25:03,310 --> 01:25:08,840
importanti, iżda inti biss jaħsbu li meta
inti tagħmel typecasting, huwa biss

1771
01:25:08,840 --> 01:25:09,720
se tħassar kollox.

1772
01:25:09,720 --> 01:25:13,970
Hekk anke jekk ikollok 0.99999, li għaddej
biex jagħtu biss 0 jekk inti typecast

1773
01:25:13,970 --> 01:25:14,800
[Inaudible] integer.

1774
01:25:14,800 --> 01:25:17,480
>> Lauren CARVALHO: Hekk biss tkun verament konxji
punt ta 'f'wiċċ l-ilma fil-preċiżjoni,

1775
01:25:17,480 --> 01:25:20,410
speċjalment meta tibda
tuża sufruni fl Pset1.

1776
01:25:20,410 --> 01:25:22,790
Iżda l-walk permezz suppost
twissi inti ta 'dak ukoll.

1777
01:25:22,790 --> 01:25:26,100
>> LUCAS FREITAS: U fil-fatt huwa verament
iebes, per eżempju, jekk jien ma

1778
01:25:26,100 --> 01:25:31,570
tweġiba float 1 huwa ugwali għal 1.0 fuq
10, u mbagħad float tweġiba 2

1779
01:25:31,570 --> 01:25:35,540
ugwali 10.0 aktar minn 100.0.

1780
01:25:35,540 --> 01:25:36,890
Dawn huma l-istess numru, id-dritt?

1781
01:25:36,890 --> 01:25:38,540
0.1, right?

1782
01:25:38,540 --> 01:25:41,700
1 minn 10 jew 10 minn 100.

1783
01:25:41,700 --> 01:25:46,360
Imma issa jekk nipprova biex tara d-ugwaljanza,
simili jekk tweġiba 1 huwa ugwali għal twieġeb 2,

1784
01:25:46,360 --> 01:25:49,300
forsi mhuwiex attwalment għaddejjin
ikunu l-istess ħaġa.

1785
01:25:49,300 --> 01:25:50,720
Allura sufruni huma tip ta 'bħal dik.

1786
01:25:50,720 --> 01:25:51,970
Huma qed simili tagħmel l-ugwaljanza.

1787
01:25:51,970 --> 01:25:55,136