#include <iostream>
#include <cstdlib>

#include "stackt.h"
#include "stacke.h"
using namespace std;

void f(::stack *p);
void g(::stack& r);

int main()
{
	::stack s;
	stackt st(cout);
	stacke se;

	f(&s);
	f(&st);
	f(&se);

	cout << "\n";

	g(s);
	g(st);
	g(se);

	return EXIT_SUCCESS;
}

void f(::stack *p)
{
	p->push(10);
	cout << p->pop() << "\n";
}

void g(::stack& r)   //Exactly the same function, but with a reference argument.
{
	r.push(20);
	cout << r.pop() << "\n";
}