Program to reverse a number by recursion Function

#include
long int rev(long int);
void main()
{
 long int n;
 clrscr();
 printf("Enter number to reverse : ");
 scanf("%ld",&n);
 printf("Reversed Number is : %ld",rev(n));
 getch();
}

long int rev(long int n)
{
 long int i=1,x;
 if(n==0){return 0;
}
 else 
{
while(i<=n)
{
i=i*10;
}
i=i/10;x=n%10;
  return(x*i+rev(n/10));
}
}