C Program Matrix Multiplication

By | March 14, 2020

C Program Matrix Multiplication

C Program Matrix Multiplication, multiply two matrices

C Program Matrix Multiplication, multiply two matrices

/* C program to multiplication two matrices

   Matrix Multiplication
   
   www.easyCodeBook.com
   
 */
#include <stdio.h>
 
int main()
{
  int m, n, p, q, i, j, k;
  int matrix1[10][10], matrix2[10][10], multiplication[10][10];
 
printf("Enter number of rows and columns of matrix1\n");
  scanf("%d%d", &m, &n);
 
printf("Enter number of rows and columns of matrix2\n");
  scanf("%d%d", &p, &q);
 
  if (n != p)
  {
  printf("Since number of columns of first matrix\n");
  printf("is not equal to number of rows of second matrix,\n");
  printf("hence both matrices are not multiplication compatible,\n");
  printf("and we cannot multiply these matrices.\n");
  return 0;
  }
  printf("Enter %d elements of matrix1 of %dx%d\n",m*n,m,n);
 
  for (i = 0; i < m; i++)
    for (j = 0; j < n; j++)
      scanf("%d", &matrix1[i][j]);
 
  printf("Enter %d elements of matrix2 of %dx%d\n",p*q,p,q);
 
    for (i = 0; i < p; i++)
      for (j = 0; j < q; j++)
        scanf("%d", &matrix2[i][j]);
 
    for (i = 0; i < m; i++) 
      for (j = 0; j < q; j++) 
	  {
        multiplication[i][j]=0;
		for (k = 0; k < p; k++) 
          multiplication[i][j] = multiplication[i][j] + matrix1[i][k]*matrix2[k][j];
      }
 
     
     
    printf("Product / Multiplication of the two matrices is as follows:\n");
 
    for (i = 0; i < m; i++) 
	{
      for (j = 0; j < q; j++)
        printf("%d\t", multiplication[i][j]);
 
      printf("\n");
     }   
  
 
  return 0;
}

Output

Enter number of rows and columns of matrix1
2
2
Enter number of rows and columns of matrix2
2
2
Enter 4 elements of matrix1 of 2×2
-1
4
2
3
Enter 4 elements of matrix2 of 2×2
9
-3
6
1
Product / Multiplication of the two matrices is as follows:

15      7
36      -3

Note: You can Enter a 2×2 matrix as

-1
4
2
3
or as
-1 4 2 3 

Output 2:
Enter number of rows and columns of matrix1

2
2
Enter number of rows and columns of matrix2
2
2
Enter 4 elements of matrix1 of 2×2
-1 4 2 3
Enter 4 elements of matrix2 of 2×2
9 -3 6 1
Product / Multiplication of the two matrices is as follows:

15      7
36      -3

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