How to reverse a number in C++ program

Reverse a number in C++ program

#include
#include 
using namespace std; 
int main() 
{ 
long n,rev=0,d; 
cout<<"Enter the number:"; cin>>n; while(n!=0) 
{  
d=n%10;  
rev=(rev*10)+d;  
n=n/10;
} 
cout<<"The reversed number is "<<rev; 
return 0; 
}