Matrix Multiplication in C

In C programming matrix is created by using 2D and 3D array but today we are working on matrix multiplication in C language.
Here the program to do Matrix Multiplication in C.

/* Pre-Processors */

#include <stdio.h>

#include<conio.h>

#define MAX 15 /*Length of MAX*/

int main()

{

  int m, n,i,j,k, sum = 0;

  int first[MAX][MAX], second[MAX][MAX], multiply[MAX][MAX];

  printf("Enter the number of rows and columns of first matrix\n");

  scanf("%d%d", &m, &n);

  printf("Enter the elements of first matrix\n");

 for (i = 0; i < m; i++)

    for (j = 0; j < n; j++)

      scanf("%d", &first[i][j]);

  printf("Enter the number of rows and columns of second matrix\n");

  scanf("%d%d", &m, &n);

printf("Enter the elements of second matrix\n");

 for (i = 0; i < m; i++)

      for (j = 0; j < n; j++)

        scanf("%d",&second[i][j]);

  for (i = 0; i < m; i++) {

      for (j = 0; j < n; j++) {

        for (k = 0; k < n; k++) {

          sum = sum + first[i][k]*second[k][j];

        }

 multiply[i][j] = sum;

        sum = 0;

      }

    }

    printf("Product of entered matrices:-\n");

 for (i = 0; i < m; i++) {

      for (j = 0; j < n; j++)

        printf("%d\t", multiply[i][j]);

 printf("\n");

    }

 getch();

  return 0;

}