在C编程中扫描字符串以获取100x100的数字

Question

I have been searching all google or stackoverflow, but could not found it. :(

I have 100 strings, each string is a number with length = 100, the strings are seperated by a break_line. Example of input:

010011001100..... (100 numbers)
...(98 strings)
0011010101010.... (100 numbers)

the ouput should be an array A[100][100] for each single number from the strings.

My codes do not work, could you please help to correct it:

#include <stdio.h>

char a[100][100];
int b[100][100];
int i,j;


int main(void)
{

    for(i = 0; i < 100; i ++){
        for(j = 0; j < 100; j ++){
            scanf ("%s", a[i][j]);
            b[i][j] = a[i][j] - '0';
            printf("%d", b[i][j]);
        }
        printf("\n");
    }
}

Thank you so much. !

Answer 1

Your code has two problems:

#include <stdio.h>

char a[100][100]; /* No space for the NUL-terminator */
int b[100][100];
int i,j;


int main(void)
{

    for(i = 0; i < 100; i ++){
        for(j = 0; j < 100; j ++){
            scanf ("%s", a[i][j]); /* %s expects a char*, not a char */
            b[i][j] = a[i][j] - '0';
            printf("%d", b[i][j]);
        }
        printf("\n");
    }
}

It should be

#include <stdio.h>

char a[100][101]; /* Note the 101 instead of 100 */
int b[100][100];
int i,j;


int main(void)
{

    for(i = 0; i < 100; i ++){
        scanf ("%s", a[i]); /* Scan a string */
        for(j = 0; j < 100; j++){
            b[i][j] = a[i][j] - '0';
            printf("%d", b[i][j]);
        }
        printf("\n");
    }
}

or

#include <stdio.h>

char a[100][100]; /* No need for space for the NUL-terminator as %s isn't used */
int b[100][100];
int i,j;


int main(void)
{

    for(i = 0; i < 100; i ++){
        for(j = 0; j < 100; j ++){
            scanf (" %c", &a[i][j]); /* Scan one character, space before %c ignores whitespace characters like '\n' */
            b[i][j] = a[i][j] - '0';
            printf("%d", b[i][j]);
        }
        printf("\n");
    }
}

Answer 2

I got the answer for my problem from Mr./Ms. BLUEPIXY .

It is

scanf("%1d", &b[i][j]);