题解 | #计算两个矩阵的乘积#

#include <stdio.h>

int main() {
    int a[3][4], b[4][3];
    for (int i = 1; i < 3; i++) {
        for (int j = 1; j < 4; j++) {
            scanf("%d", &a[i][j]);
        }
    }
    for (int i = 1; i < 4; i++) {
        for (int j = 1; j < 3; j++) {
            scanf("%d", &b[i][j]);
        }
    }
    int a11 = 0, a12 = 0, a21 = 0, a22 = 0;
    for (int j = 1; j < 4; j++) {
        a11 += (a[1][j] * b[j][1]);
        a12 += (a[1][j] * b[j][2]);
        a21 += (a[2][j] * b[j][1]);
        a22 += (a[2][j] * b[j][2]);
    }
    printf("%d %d\n%d %d\n", a11, a12, a21, a22);
    return 0;
}