Modulues of two integer values entered by user

//Modulues of two integer values entered by user.

#include<stdio.h>
#include<conio.h>

void main()
{
  int num1,num2,modules;   //declare a integer varaiable
  clrscr();   //clear the screen
  printf("Enter the first number of an integer:");  //Show the message to user
  scanf("%d",&num1);  //Store the value entered by user in variable num1.
  printf("Enter the second number of an integer:");  //Show the message to user
  scanf("%d",&num2);   //Store the value entered by user in variable num2.
  modules=num1%num2;
  printf("modules:%d",modules);  //Modules of two numbers
  getch();  //Hold the screen for output
}

Output:

Enter the first number of an integer:20
Enter the second number of an integer:6
modules:2