程序代码：

#include <stdio.h>
#include <time.h>
#include <stdlib.h>

int main(void)
{
    int m;
    int a[100][100] = {0};
    int i, j;

    srand((unsigned)time(NULL));
    printf("Please input a integer m: ");
    scanf("%d", &m);
    for (i = 0; i < m; i++)
    {
        for (j = 0; j < m; j++)
        {
            a[i][j] = rand() % 100;
            printf("%d  ", a[i][j]);
        }
        printf("\n");
    }
      return 0;
}