Reverse Three digit no.

//Program made by Puneet Sharma
#include < stdio.h >
#include < conio.h >
//reverse three digit no
void main()
{
int a,b,r;
clrscr();
printf("Enter 3 digit no=");
scanf("%d",&a);
r=a%10;
b=r*100;
a=a/10;
r=a%10;
b=b+r*10;
a=a/10;
b=b+a;
printf("Result is %d",b);
getch();
}