Substract two number

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,res;

clrscr();

printf("Enter the value of a:");

scanf("%d",&a);

printf("\nEnter the value of b:");

scanf("%d",&b);

res=a-b;

printf("Result=%d",res);

getch();

}

                              Output

Enter the value of a :9 Enter the value of b :6 Result   : 3