// swap function using template
//
#include <iostream>
#include <string>
// using namespace std; // conflict with iostream swap thing
using std::cout, std::endl;
using std::string;

template<typename T> void swap( T &a, T &b) { T c = a; a = b; b = c; }

int main()
{
  int i = 1, j = 2;
  cout << i << " " << j << endl;
  swap( i, j);
  cout << i << " " << j << endl;

  double x = 3.3, y = 4.4;
  cout << x << " " << y << endl;
  swap( x, y);
  cout << x << " " << y << endl;

  string s = "abc", t = "efg";
  cout << s << " " << t << endl;
  swap( s, t);
  cout << s << " " << t << endl;
}