//Reads two matrices, multiply them and print the result
//Author: Bashir M. Ghandi

#include <stdio.h>
#define ROW 10
#define COL 10
main()
{
    int i, j, k, A[ROW][COL], B[ROW][COL], C[ROW][COL] = {0};
    int rowsA, colsA, rowsB, colsB;

    printf("Enter number of rows for Matrix 1:\n");
    scanf("%d", &rowsA);
    printf("Enter number of columns for Matrix 1:\n");
    scanf("%d", &colsA);
    printf("Enter the %d elements:\n", rowsA*colsA);
    for (j=0; j < rowsA; j++)
        for (k=0; k < colsA; k++)
            scanf("%d", &A[j][k]);

    printf("Enter number of rows for Matrix 2:\n");
    scanf("%d", &rowsB);
    printf("Enter number of columns for Matrix 2:\n");
    scanf("%d", &colsB);
    printf("Enter the %d elements:\n", rowsB*colsB);
    for (j=0; j < rowsB; j++)
        for (k=0; k < colsB; k++)
          scanf("%d", &B[j][k]);
    
    if (colsA != rowsB)
    {
         printf("Sorry, you cannot multiply these matrices!\n");
         return 0;
    }
    else  //multiply them
    {
      for (i=0; i < rowsA; i++)
        for (j=0; j < rowsB; j++)
            for (k=0; k < colsB; k++)
                C[i][k] += A[i][j] * B[j][k];
    }
    printf("The product of the two matrices is:\n");
    for (i=0; i < rowsA; i++)
    {
        for (k=0; k < colsB; k++)
            printf("%5d  ", C[i][k]);
        printf("\n");
    }
    return 0;
}