任意输入两个矩阵，计算并输出两个矩阵的乘积矩阵用c程序怎么写

可以使用双重循环实现矩阵的乘积，具体代码如下：

#include <stdio.h>

int main() {
    int row1, col1, row2, col2;
    printf("Enter the dimensions of the first matrix: ");
    scanf("%d %d", &row1, &col1);

    printf("Enter the dimensions of the second matrix: ");
    scanf("%d %d", &row2, &col2);

    // Check if matrices can be multiplied
    if (col1 != row2) {
        printf("Matrices cannot be multiplied!\n");
        return 0;
    }

    int mat1[row1][col1], mat2[row2][col2], prod[row1][col2];

    // Input matrices
    printf("Enter the elements of the first matrix:\n");
    for (int i = 0; i < row1; i++) {
        for (int j = 0; j < col1; j++) {
            scanf("%d", &mat1[i][j]);
        }
    }

    printf("Enter the elements of the second matrix:\n");
    for (int i = 0; i < row2; i++) {
        for (int j = 0; j < col2; j++) {
            scanf("%d", &mat2[i][j]);
        }
    }

    // Multiply matrices
    for (int i = 0; i < row1; i++) {
        for (int j = 0; j < col2; j++) {
            int sum = 0;
            for (int k = 0; k < col1; k++) {
                sum += mat1[i][k] * mat2[k][j];
            }
            prod[i][j] = sum;
        }
    }

    // Print product matrix
    printf("Product matrix:\n");
    for (int i = 0; i < row1; i++) {
        for (int j = 0; j < col2; j++) {
            printf("%d ", prod[i][j]);
        }
        printf("\n");
    }

    return 0;
}

在这个程序中，首先从用户输入中获取两个矩阵的维度，然后检查它们是否可以相乘。如果可以，就分别输入两个矩阵的元素，并使用三重循环计算它们的乘积。最后，输出结果矩阵。