#include <iostream>
#include <string>

using std::cout;
using std::endl;
using std::string;

#include "Pair.h"

int main(int argc, char **argv) {
  Pair<string> ps;  // this usage instantiates a class Pair<string>
  string x("foo"), y("bar");
  
  ps.set_first(x);   // first_ = "foo", second_ = ""
  ps.set_second(y);  // first_ = "foo", second_ = "bar"
  ps.Swap();         // first_ = "bar", second_ = "foo"
  cout << ps << endl;  // nonmember overloaded operator<< invoked

  return EXIT_SUCCESS;
}