reverse a number

#include<stdio.h>
#include<conio.h>
void main()
{int n, a=0;
printf("enter a number to reverse");
scanf("%d",&n);
while(n!=0)
{a=a*10;
a=a+n%10;
n=n/10;
}
printf("\nreverse of entered number is =%d",a);
getch();
}