Program for Subtraction of two input number using 'C'.

#include <stdio.h>

#include<conio.h>//not necessary

void main()

{

   int num1, num2, sub; //declaration

   printf("Enter first number: "); //for input 

   scanf("%d", &num1);

   printf("Enter second number: "); //for input

   scanf("%d", &num2);

   sub = num1 - num2; //substraction

   printf("Substraction of the entered numbers: %d", sub);

   clrscr();//not necessary

}