to find the riverse of a number

#include<stdio.h>
main()
{
int a,b,rev=0,temp;
printf("enter your number: ");
scanf("%d",&a);
temp=a;
while(a>0)
{
b=a%10;
rev=rev*10+b;
a=a/10;
}
printf("\nreverse of %d is %d",temp,rev);
}