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>> SPEAKER: Aħna ser sejħa hija string.

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Huwa biss sekwenza ta 'karattri.

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Tabilħaqq, huwa sempliċement
firxa ta 'karattri.

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U hekk anke jekk ikollna string mill-
utent fil-mod tas-soltu ma 'l-CS50

6
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GetString, nistgħu mbagħad jipproċedi li
jtenni fuq l-Chars f'dak string

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wieħed fi żmien bħallikieku dik
sekwenza huwa tabilħaqq firxa.

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Ejja nippruvaw dan fil-kodiċi.

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>> Inkludi cs50.h.

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00:00:21,470 --> 00:00:24,440
Inkludi stdio.h.

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U ejja jinkludu wkoll string.h
b'tali mod li għandna aċċess

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funzjoni StringLen.

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00:00:29,500 --> 00:00:33,220
Ejja issa jiddikjara prinċipali
null prinċipali kif int.

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00:00:33,220 --> 00:00:36,740
U ejja issa tipproċedi biex tikseb
string mill-utent.

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Printf input.

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Ejja issa jiddikjara string ssejjaħ dan
i, u sejħa GetString ħabib tagħna.

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>> Ejja issa tipproċedi biex jiċċekkja, ma l-utent
tabilħaqq tagħti me a string minħabba

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jirriżulta per ta GetString stess
dokumentazzjoni, GetString jista fuq

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00:00:53,370 --> 00:00:56,830
NULL ritorn okkażjoni, a sentinella speċjali
valur li essenzjalment

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jindika li l-utent ma
jikkooperaw u b'xi mod ma

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ma jipprovdu sekwenza.

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Mela ejja check għal dak
ma 'kundizzjoni.

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>> JEKK s ma NULL ugwali, allura nistgħu
jassumi li s huwa tabilħaqq string, l-

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firxa ta 'karattri, u tipproċedi biex
jtenni fuq dawk il-karattri.

25
00:01:14,580 --> 00:01:22,240
GĦALL int i gets 0, ejja wkoll jiddikjara n
bħala daqs it-tul sensiela ta 'i hekk

26
00:01:22,240 --> 00:01:27,900
Sakemm i huwa inqas minn n, u fuq kull
iterazzjoni, ejja inkrement i.

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00:01:27,900 --> 00:01:35,200
Fi ħdan dan loop Imbagħad, ejja sejħa printf
ta '% c backslash n u mbagħad plagg

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fis dan il-valur s bracket i b'hekk
istampar karattru wieħed fi żmien kull

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mill-karozzi fl-i.

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>> Ejja issa jikkompilaw u
run dan il-programm.

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Għamla string.

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. / String input tiegħi se tkun "bonjour."
U hemm aħna għandna hija.

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H-E-L-L-O, kull char fuq il-linja tagħha stess.

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