/*##Matrix Multiplication, 2 D (dimensional) Multiplication Array Example , Multidimensional Array Example*/
/*##Calculation Programs, Datatype Programs, Basic Programs*/

#include <stdio.h>

int main()
{
  int rowCountOne, columnCountOne, rowCountTwo, columnCountTwo, i, j, k, sum = 0;
  int firstMatrix[10][10], secondMatrix[10][10], resultMatrix[10][10];

  printf("Number of rows in first matrix : ");
  scanf("%d", &rowCountOne);

  printf("Number of columns in first matrix : ");
  scanf("%d", &columnCountOne);

  printf("Elements of first matrix : \n");

  for (i = 0; i < rowCountOne; i++)
    for (j = 0; j < columnCountOne; j++)
      scanf("%d", &firstMatrix[i][j]);
      
 for (i = 0; i < rowCountOne; i++){
    for (j = 0; j < columnCountOne; j++){
      printf("%d\t", firstMatrix[i][j]);
    } 
    printf("\n");  
 }     

  printf("Number of rows of second matrix : ");
  scanf("%d", &rowCountTwo);

  printf("Number of columns of second matrix : ");
  scanf("%d", &columnCountTwo);

  if (columnCountOne != rowCountTwo)
    printf("Matrices with entered orders cannot be multiplied.\n");
  else
  {
    printf("Elements of second matrix : \n");

    for (i = 0; i < rowCountTwo; i++)
      for (j = 0; j < columnCountTwo; j++)
        scanf("%d", &secondMatrix[i][j]);
        
        
  for (i = 0; i < rowCountOne; i++){
    for (j = 0; j < columnCountOne; j++){
      printf("%d\t", secondMatrix[i][j]);
    }        
    printf("\n");    
  }  

    for (i = 0; i < rowCountOne; i++) {
      for (j = 0; j < columnCountTwo; j++) {
        for (k = 0; k < rowCountTwo; k++) {
          sum = sum + firstMatrix[i][k]*secondMatrix[k][j];
        }

        resultMatrix[i][j] = sum;
        sum = 0;
      }
    }

    printf("After Multiplication, the result is : \n");

    for (i = 0; i < rowCountOne; i++) {
      for (j = 0; j < columnCountTwo; j++)
        printf("%d\t", resultMatrix[i][j]);

      printf("\n");
    }
  }

  return 0;
}