/***************************************************************************
                          stack.cpp  -  description
                             -------------------
    begin                : mar mag 6 2008
    copyright            : (C) 2008 by Gabriele Di Stefano
    email                : gabriele@ing.univaq.it
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

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


Stack::Stack(){
}

int Stack::size() const{
 
   return elementi.size();

}

void Stack::push(int x){
  
  elementi.push_back(x);
  
  }

void Stack::pop() throw(Eccezione){

  if (elementi.size()==0)
    throw Eccezione("Stack vuoto, pop() non eseguibile");

  elementi.pop_back();
}

int Stack::top() const{

    if (elementi.size()==0)
    throw Eccezione("Stack vuoto, top() non eseguibile");

  
  return elementi.back();
}