#ifndef STACKTH
#define STACKTH
#include <iostream>
#include "stack.h"
using namespace std;

class stackt: public stack {   //stack with tracing output
	ostream& ost;
public:
	stackt(ostream& initial_ost): stack {}, ost {initial_ost} {
		ost << "stackt()\n";
	}
	~stackt() {ost << "~stackt()\n";}

	void push(int i) {
		stack::push(i);
		ost << "push(" << i << ")\n";
	}

	int pop() {
		const int i {stack::pop()};
		ost << "pop returns " << i << "\n";
		return i;
	}
};
#endif