// template_welcome.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>

const int MAXS = 100;

template <class mType>  
class TStack {
	mType data[MAXS];
	int pos;
public:
	TStack() : pos(0) { } ;
	bool push(mType);
	bool pop();
	bool top(mType&);
	int size() { return pos };

	template <typename mType>
	friend TStack<mType>& operator << (TStack<mType>&, mType);

//	TStack<mType> & operator << (mType);
};


template <typename mType>
TStack<mType>& operator << (TStack<mType>& s, mType var) {
	s.push(var);
	return s;
}

/*
template <class mType>
TStack<mType>& TStack<mType>::operator << (mType var) {
	push(var);
	return *this;
}*/

template <class mType>
bool TStack <mType>::push(mType newElem)  {
	if (pos < MAXS) {
		data[pos++] = newElem;
		return true;
	}
	else
		return false;
}

template <class mType>
bool TStack <mType>::pop()  {
	if (pos) {
		pos--;
		return true; 
	}
	else
		return false;
}

template <class mType>
bool TStack <mType>::top(mType& res)  {
	if (pos)  {
		res = data[pos-1];
		return true;
	}
	else
		return false;
}

int main() {
	int res;
	TStack<int> si;
	TStack<char> sc;

	si << 10 << 20 << 30;

	si.top(res);
	std::cout << res;
	si.pop();
	std::cout << si.size();

	return 0;
}