c语言 6-12

1、

#include <stdio.h>

void multiply(int x[4][3], int y[3][4], int z[4][4])
{
    int i, j, k;
    for(i = 0; i < 4; i++)
    {
        for(j = 0; j < 4; j++)
        {
            for(k = 0; k < 3; k++)
            {
                z[i][j] += x[i][k] * y[k][j];
            }
        }
    }
}

void print(int x[4][4])
{
    int i, j;
    for(i = 0; i < 4; i++)
    {
        for(j = 0; j < 4; j++)
        {
            printf("%4d", x[i][j]);
        }
        putchar('
');
    }
}

int main(void)
{
    int a[4][3] = {{2,4,3},{1,2,3},{2,4,1},{6,2,1}}, b[3][4] = {{3,2,1,2},{4,1,3,2},{2,1,4,3}}, c[4][4] = {};
    multiply(a, b, c);
    puts("show the result.");
    print(c);
    return 0;
}