Matrix subtraction using C

This c program subtraction two matrices i.e. compute the subtraction of two matrices and then print it. Firstly user will be asked to enter the order of matrix (number of rows and columns) and then two matrices. For example if the user entered order as 2, 2 i.e. two rows and two columns and matrices as
First Matrix :-

4 5
8 5
Second matrix :-
1 2
3 4
then output of the program (sum of First and Second matrix) will be
3 3

5 1

#include <stdio.h>

#include<conio.h>

void  main()

{

   int m, n, c, d, first[10][10], second[10][10], sum[10][10];

   clrscr();

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

   scanf("%d%d", &m, &n);

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

   for (c = 0; c < m; c++)

      for (d = 0; d < n; d++)

         scanf("%d", &first[c][d]);

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

   for (c = 0; c < m; c++)

      for (d = 0 ; d < n; d++)

            scanf("%d", &second[c][d]);

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

   for (c = 0; c < m; c++) {

      for (d = 0 ; d < n; d++) {

         sum[c][d] = first[c][d] - second[c][d];

         printf("%d\t", sum[c][d]);

      }

      printf("\n");

   }

   getch();

}