Multiplication of matrix

Inputs to the script

Conditions of multipication

Output of the script

result[row1][col2]  = matrix1[row1][col1] x matrix2[row2][col2]

result[2][3]  = matrix1[2][4] x matrix2[4][3]

Example 1

#include <stdio.h>
int main(void){
int i,j,k,sum;
int num1[2][3]={
                {1,2,3},
                {4,5,6}              
                };
int num2[3][2]={
                {7,8},
                {9,10},
		{11,12}              
                };                

int result[2][2]; 
for(k=0;k<2;k++){              
for(i=0;i<2;i++){
sum=0;
for(j=0;j<3;j++){
sum = sum + num1[k][j]*num2[j][i];
}
printf("%d ",sum);
}
printf("\n");
}
return 0;
}

58 64
139 154

Example 2

#include <stdio.h>
 
int main()
{
  int r1, c1, r2, c2, i, j,a,sum = 0;
// r1 is number of rows and c1 is number of columns in 1st matrix
// r2 is number of rows and c2 is number of columns in 2nd matrix 
// Declare matrix ///
  int first[10][10], second[10][10], multiply[10][10];
 
  printf("Enter number of rows and columns of first matrix\n");
  scanf("%d%d", &r1, &c1);
  printf("Enter elements of first matrix\n");
 
  for (i = 0; i < r1; i++)
    for (j = 0; j < c1; j++)
      scanf("%d", &first[i][j]);
 
  printf("Enter number of rows and columns of second matrix\n");
  scanf("%d%d", &r2, &c2);
 
  if (c1!= r2)
    printf("The matrices can't be multiplied with each other.\n");
  else
  {
    printf("Enter elements of second matrix\n");
 
    for (i = 0; i < r2; i++)
      for (j = 0; j < c2; j++)
        scanf("%d", &second[i][j]);
 // Entry is over now multiplication of two matrices
 
    for (i = 0; i < r1; i++) {
      for (j = 0; j < c2; j++) {
        for (a = 0; a < r2; a++) {
          sum = sum + first[i][a]*second[a][j];
        }
 
        multiply[i][j] = sum;
        sum = 0;
      }
    }
    
// display the first , then second and then product matrix //
// display first martrix //
printf("First matrix \n");
   for (i = 0; i < r1; i++){
    for (j = 0; j < c1; j++){
      printf("%d ", first[i][j]);
	}
	printf("\n");
	}
printf("Second  matrix \n");
   for (i = 0; i < r2; i++){
    for (j = 0; j < c2; j++){
      printf("%d ", second[i][j]);
	}
	printf("\n");
	}
// display product matrix //	
    printf("Product of the matrices:\n");
     for (i = 0; i < r1; i++) {
      for (j = 0; j < c2; j++)
        printf("%d ", multiply[i][j]);
      printf("\n");
    }
  }
 
  return 0;
}