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

int main()
{
	::stack s;               //Call the constructor.
	s.push(10);
	s.push(20);
	cout << s.pop() << "\n"; //This pop will work correctly.

	s.~stack();              //Call the destructor explicitly.  Never do this.
	cout << s.pop() << "\n"; //This pop may not work.
	return EXIT_SUCCESS;     //Call the destructor implicitly; may not work.
}