96 lines
1.9 KiB
C++
96 lines
1.9 KiB
C++
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/*
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----
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This file is part of SECONDO.
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Copyright (C) 2010, University in Hagen,
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Faculty of Mathematics and Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//paragraph [1] Title: [{\Large \bf \begin{center}] [\end{center}}]
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//paragraph [10] Footnote: [{\footnote{] [}}]
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//[TOC] [\tableofcontents]
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//[_] [\_]
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[1] A simple stack implementation
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[TOC]
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*/
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#ifndef STACK_H
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#define STACK_H
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#include <assert.h>
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template<class T>
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class stackElem{
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public:
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stackElem(const T& t, stackElem* root): elem(t), next(root){}
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T elem;
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stackElem* next;
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};
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template<class T>
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class Stack{
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public:
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Stack(): root(0), size(0) {}
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void push(const T& elem){
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root = new stackElem<T>(elem, root);
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size++;
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}
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T pop(){
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assert(root);
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stackElem<T>* s = root;
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root = root->next;
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T res(s->elem);
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delete s;
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size--;
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return res;
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}
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T top() const{
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assert(root);
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return root->elem;
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}
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bool isEmpty() const{
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return (root==0);
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}
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size_t getSize(){
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return size;
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}
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void makeEmpty(){
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while(root){
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stackElem<T>* victim = root;
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root = root->next;
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delete victim;
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}
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size = 0;
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}
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private:
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stackElem<T>* root;
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size_t size;
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};
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#endif
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