C语言程序设计（二维数组）

Question

编写程序，计算两个矩阵（均为2行2列）之积。输入分2*2行：前两行为第一个矩阵，后两行为第二个矩阵。样例输入：12453517样例输出：51917?55
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Answer 1

#include <stdio.h>

#define N 2

int main()
{
    int a[N][N], b[N][N], c[N][N];
    for (int i = 0; i < N; i++)
        for (int j = 0; j < N; j++)
            scanf("%d", &a[i][j]);
    for (int i = 0; i < N; i++)
        for (int j = 0; j < N; j++)
            scanf("%d", &b[i][j]);
    for (int i = 0; i < N; i++)
    {
        for (int j = 0; j < N; j++)
        {
            c[i][j] = 0;
            for (int k = 0; k < N; k++)
                c[i][j] += a[i][k] * b[k][j];
        }
    }
    for (int i = 0; i < N; i++)
    {
        for (int j = 0; j < N; j++)
            printf("%d ", c[i][j]);
        printf("\n");
    }
}