#include <iostream>
#include <cstdlib>
#include "date.h"
using namespace std;

//Swap the values of a and b.
//T must be copy constructable (line 12) and assignable (lines 13-14).

template <class T>
inline void swap(T *a, T *b)
{
	const T temp = *a;
	*a = *b;
	*b = temp;
}

int main()
{
	int i = 10;
	int j = 20;
	::swap(&i, &j);              //change T to int
	cout << "i == " << i << ", j == " << j << "\n";

	double d = 3.14;
	double e = 2.71;
	::swap(&d, &e);
	cout << "d == " << d << ", e == " << e << "\n";

	date today;
	date tomorrow = today + 1;
	::swap(&today, &tomorrow);   //change T to date
	cout << "today == " << today << ", tomorrow == " << tomorrow << "\n";

	const char *p = "hello";
	const char *q = "goodbye";
	::swap(&p, &q);              //change T to const char *
	cout << "p == \"" << p << "\", q == \"" << q << "\"\n";

	return EXIT_SUCCESS;
}