#include <stl.h>
#include <iostream.h>

int numbers[6] = { 0, 1, 2, 3, 4, 5 };

int main ()
{
  iter_swap (numbers, numbers + 3);
  for (int i = 0; i < 6; i++)
    cout << numbers[i] << ' ';
  cout << endl;
  return 0;
}