[英]Reading strings into 2 dimensional array in C
我想使用getchar()
從文本文件(標准輸入)讀取多個字符串到二維數組。 請忽略代碼中的幻數。
#include <stdio.h>
#include <stdlib.h>
int
main(int argc, char *argv[]) {
char string[100][20];
int c, j = 0, i = 0;
while ((c = getchar()) != EOF) {
while (c != '\n') {
string[j][i] = c;
i++;
}
string[j][i] = '\0';
j++;
}
printf('string is: %s', string);
return 0;
}
您需要在內部 while 循環中再使用一個getchar()
。
while (c != '\n') {
string[j][i] = c;
i++;
c = getchar(); /* this you need here to fetch char until \n encounters */
}
並且一旦此string[j][i] = '\\0';
需要再次使變量i
0
已經完成了。
還有這個
printf('string is: %s', string);
是錯的。 它應該是
printf("string is: %s", string); /* use double quotation instead of single */
示例代碼
int main(int argc, char *argv[]) {
char string[100][20];
int c, j = 0, i = 0;
while ((c = getchar()) != EOF) { /* this loop you need to terminate by pressing CTRL+D(in linux) & CTRL+Z(in windows) */
while (c != '\n') { /* this loop is for 1D array i.e storing char into each 1D array */
string[j][i] = c;
i++;
c = getchar(); /* add this, so that when you press ENTER, inner while loop fails */
}
string[j][i] = '\0';
j++;
i = 0;/* make it zero again, so that it put char into string[j][0] everytime once 1 line is completed */
}
for(int row = 0;row < j;row++) { /* rotate loop j times since string is
2D array */
printf("string is: %s", string[row]);
}
return 0;
}
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