c语言中求两个矩阵的成绩

#include <stdio.h>

int main(void)
{
    int a[4][3] = {{2,5,4},{1,2,4},{5,3,2},{4,2,6}};
    int b[3][4] = {{2,1,6,2},{3,2,4,1},{5,2,1,2}};
    int i, j, k;
    int c[4][4] = {0};
    for (i = 0; i < 4; i++)
    {
        for (k = 0; k < 4; k++)
        {
            
            for (j = 0; j < 3; j++)
                {
                    c[i][k] += a[i][j] * b[j][k];
                }
        }
        
    }
    printf("%d.\n", c[0][0]);
    return 0;
}