#include<stdio.h>
#include<stdlib.h>
#define N 400
#define M 200
int a[N][N]={0},b[M][M]={0},c[M][M]={0},d[M][M]={0};
int main()
{
    char str[512], *p;
    int k,m,n, q,i,j=0,x=0,y=0;
    for (i = 0; gets(str) != NULL; i++)    {          //gets遇到换行符或EOF结束
        for (j = 0, p = str; p != NULL; p = strchr(p + 1, ' '), j++)
            sscanf(p, "%d", &a[i][j]) != EOF;
        if(i==0)
            k=j;
        else {
            y=j;
            if(y!=k)
            n=y,x+=1;
        }
    }
    if(x==0)
    n=k;
    m=i-k;
    for(i=0;i<m;i++){                   //b(m行k列)
        for(j=0;j<k;j++)
        b[i][j]=a[i][j];             //将a[][]分成所要求积的两个矩阵
    }
    for(i=m;i<m+k;i++){              //c(k行n列)
        for(q=0;q<n;q++){
            c[i-m][q]=a[i][q];
        }
    }
    for(i=0;i<m;i++){                     //i-m;j-k;q-n
        for(q=0;q<n;q++){            
            for(j=0;j<k;j++)
            {d[i][q]+=b[i][j]*c[j][q];}
            if (q==n-1)
            {printf("%-d \n",d[i][q]);}
            else printf("%-d ",d[i][q]);
        }
    }  
    return 0;
}
先谢谢各位~ ~