Reversing digits of a number

#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
int ,num,rev=0,rem;
printf("Enter the number:");
scanf("%d",&num);
while(num!=0)
{
rem=num%10;
rev=rev*10+rem;
num=num/10;
}
printf("Reverse of given Number is:%d",rev);
getch();
}