1
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2
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>> SPEAKER 1: L-aħħar darba aħna analizzati
interi, ifakkar li użajna xi

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Espressjonijiet Boolean biex jiċċekkjaw jekk utent tal-
n input kien bejn in-numri

4
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bħall-0 u 3, 4 u 7, u 8 u 10.

5
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Ukoll, għamilna li l-użu jekk u ieħor
jekk, l iżda jirriżulta tista

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jimplimentaw l-istess loġika użu ta '
jinbena differenti programmazzjoni

7
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għal kollox waqt li xorta kisba
preċiżament l-istess riżultat.

8
00:00:21,400 --> 00:00:25,000
Fil-fatt, nistgħu jintroduċu xi ħaġa
imsejħa swiċċ li jippermetti li

9
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jaqilbu l-imġiba tagħna jiddependi fuq
il-valur ta 'xi varjabbli.

10
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>> Ejja tagħti dan jipprova.

11
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Biex tagħmel dan, jien l-ewwel ser jinkludu
il-librerija cs50 permezz ta cs50.h.

12
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Jien ukoll ser jinkludi l-istandard
librerija permezz ta 'standard I / O.h.

13
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U jien ser tiddikjara prinċipali
il-mod tas-soltu, int null prinċipali.

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Iftaħ kaboċċi Brace.

15
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Agħlaq kaboċċi Brace.

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U issa jien ser titlob lill-
utent għal integer.

17
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>> Printf, tagħti me int
bejn 1 u 10.

18
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U issa jien se tikseb
li int tuża l-cs50

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libreriji jiffunzjonaw, GetInt.

20
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Int, ejja sejħa hija n, ugwali GetInt.

21
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U issa jien ser jagħmlu daqsxejn
ta 'analiżi fuq dik integer.

22
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Kemmxejn b'mod arbitrarju, iżda ma 'dan
jibnu ġdida magħrufa bħala swiċċ.

23
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Ixgħel il-valur ta 'n kif ġej.

24
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>> Fil-każ li n daqs 1, jew fil-
każ li n ugwali 2, jew fil-każ

25
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li n ugwali 3, imorru quddiem u
jesegwixxi din il-linja tal-kodiċi.

26
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Printf inti qabad int żgħir, break.

27
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Issa, I-ħtieġa li jimplimentaw l-ekwivalenti
ta 'ELT sempliċi billi

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enumerazzjoni f'xi każijiet addizzjonali.

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>> Fil-każ li n ugwali 4, jew fil-
każ li n ugwali 5, jew fil-każ

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li n ugwali 6, jew fil-każ li n
ugwali 7, imorru quddiem u jistampa inti

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qabad Int medju.

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Break.

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Issa fil-każ li l-utent qabad
Numru kbir, ejja

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jiskopru dak kif ġej.

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>> Fil-każ li l-utent qabad tmien
jew fil-każ li l-utent pick

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disa ', jew fil-każ li l-utent pick
10, imorru quddiem u jistampa inti

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qabad Int kbir.

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Break.

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ELT, jekk utent ma pick numru
li taqa 'fi kwalunkwe ta' dawn l-10-każijiet,

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ejja għandhom xi imġieba default.

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Li f'dan il-każ se tkun kif ġej.

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>> Default, printf, inti qabad
ta Int invalidu.

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Break.

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Issa, jekk I ħlief dan il-fajl jikkompilaw
hija ma tagħmel switch.

46
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Run ma. Swiċċ slash.

47
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Ejja nagħmlu koppja ta 'kontrolli sanità.

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I ser pick Int ta '1.

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U ID qabad int żgħir.

50
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>> Ejja issa do. Mmejla switch.

51
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U tip jiġifieri, negattiv 1.

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U ID qabad int invalidu.

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Fl-aħħar tal-ġurnata, il-bidla
jinbena ma tippermettix li tagħmel

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xi ħaġa li inti ma setgħux diġà jagħmlu
bl-aktar familjari jekk, inkella jekk,

55
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inkella jinbena.

56
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Imma jekk ikollok lista finit ta 'valuri
li int kontroll għal, a

57
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dikjarazzjoni swiċċ jista 'ħafna
ukoll tagħmel kodiċi tiegħek aktar

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espliċitu, jew aktar leġġibbli.

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