// swap.cpp
#include <iostream>
using namespace std;

void swap(int *b, int *c)
{
  int temp = *b;
  *b = *c;
  *c = temp;
}

int main()
{
  int x = 3, y = 5;
  swap(&x, &y);
  cout << x << " " << y << endl;
  return 0;
}