矩阵相乘

很久之前做的，代码也还看得过去吧。

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

int main()
{
    int ar, br, ac, bc;                                  //行列
    int a[100][100], b[100][100], c[100][100];           //矩阵
    int i, j, k, n;                                      //*变量
    int ai = 0, ai_bj = 0, bi = 0, ci = 0, cj = 0, t, p; //
    int temp = 0;                                        //临时变量
                                                         //input
    scanf("%d %d", &ar, &ac);
    for (i = 0; i < ar; i++)
    {
        for (j = 0; j < ac; j++)
        {
            scanf("%d", &a[i][j]);
        }
    }
    scanf("%d %d", &br, &bc);
    for (i = 0; i < br; i++)
    {
        for (j = 0; j < bc; j++)
        {
            scanf("%d", &b[j][i]);
        }
    }
    //judge
    if (ac != br)
    {
        printf("Error: %d != %d", ac, br);
    }
    else
    {
        //mutiple
        t = 0;
        p = 0;
        while (ai < ar)
        {
            while (bi < bc)
            {
                for (i = 0; i < ac; i++)
                {
                    temp += a[ai][i] * b[bi][i];
                }
                c[t][p++] = temp;
                temp = 0;
                bi++;
            }
            ai++;
            t++;
            p = 0;
            bi = 0;
        }
        printf("%d %d\n", ar, bc);
        for (i = 0; i < ar; i++)
        {
            for (j = 0; j < bc; j++)
            {
                printf("%d", c[i][j]);
                if (j != bc - 1)
                    printf(" ");
            }
            printf("\n");
        }
    }

    // system("pause");
    return 0;
}