friend_swap.cpp

#include <bits/stdc++.h>
using namespace std;
class temp {
  int x, y, q;

  public:
  void input() {
    cout << "Enter Two Numbers :";
    cin >> x >> y;
  }
  friend void swap(temp& t);
  void display() {
    cout << "After Swap x is :" << x << "\n";
    cout << "After Swap y is :" << y << "\n";
  }
};
void swap(temp& t) {
  t.q = t.x;
  t.x = t.y;
  t.y = t.q;
}
int main() {
  temp t1;
  t1.input();
  swap(t1);
  t1.display();
  return 0;
}