matrix-multiply.c

#include <stdio.h>

int main()
{
    int rows, cols;

    // Get the dimensions of the matrices
    printf("Enter the number of rows: ");
    scanf("%d", &rows);
    printf("Enter the number of columns: ");
    scanf("%d", &cols);

    // Allocate memory for the matrices
    int matrix1[rows][cols], matrix2[rows][cols], result[rows][cols];

    // Read elements of the first matrix
    printf("\nEnter elements of the first matrix:\n");
    for (int i = 0; i < rows; ++i)
    {
        for (int j = 0; j < cols; ++j)
        {
            printf("Enter element a%d%d: ", i + 1, j + 1);
            scanf("%d", &matrix1[i][j]);
        }
    }

    // Read elements of the second matrix
    printf("\nEnter elements of the second matrix:\n");
    for (int i = 0; i < rows; ++i)
    {
        for (int j = 0; j < cols; ++j)
        {
            printf("Enter element b%d%d: ", i + 1, j + 1);
            scanf("%d", &matrix2[i][j]);
        }
    }

    // Multiply the matrices
    for (int i = 0; i < rows; ++i)
    {
        for (int j = 0; j < cols; ++j)
        {
            result[i][j] = 0;
            for (int k = 0; k < cols; ++k)
            {
                result[i][j] += matrix1[i][k] * matrix2[k][j];
            }
        }
    }

    // Print the result matrix
    printf("\nResult matrix:\n");
    for (int i = 0; i < rows; ++i)
    {
        for (int j = 0; j < cols; ++j)
        {
            printf("%d ", result[i][j]);
        }
        printf("\n");
    }

    return 0;
}