#include <iostream>

using namespace std;

void swap(int *apt, int *bpt);

int main()
{
  int alpha = 5;
  int beta = 13;
  
  cout << "alfa -> " << alpha << "  beta -> " << beta << endl;
  
  swap(&alpha, &beta);
  
  cout << "alfa -> " << alpha << "  beta -> " << beta << endl;
  
}

void swap(int *apt, int *bpt)
{
  int temp;
  temp = *apt;
  *apt = *bpt;
  *bpt = temp;
}