A C++ program to reverse a number using function.

ReverseNumber.cpp

#include<iostream>
#include<conio.h>

using namespace std;

int rev(int n);

int main()
{
 int x;
 cout<<"Enter any number to reverse it : ";cin>>x;
 cout<<"\nThe reverse form of "<<x<<" is "<<rev(x);
 getch();
 return(0);
}

int rev(int n)
{   int num;
 while(n!=0)
 {
  int r=n%10;
  num=num*10+r;
  n=n/10;
 }
 return(num);
}