c数组

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int a[3][4];
    for (int i = 0; i < 12; i++)
    {
        a[i / 4][i % 4] = i;
        printf("\n%d,%d,%d", i / 4, i % 4, i);
    }
    printf("\n");
    for (int i = 0; i < 3; i++)
    {
        for (int j = 0; j < 4; j++)
        {
            printf("%4d", a[i][j]);
        }
        printf("\n");
    }
    system("pause");
}