#ifndef STACK_LE_H
#define STACK_LE_H

#include "stack.h"

class StackLE  : public Stack  {
 private:
   // Private data  
   struct elemPilha {
	 elemPilha *next_; 
	 int value_;
	 elemPilha(elemPilha *p, int v) { next_=p; value_=v; } 
   };
   elemPilha* top_;                                   
 public:
   // Construtor           
   StackLE();   

   // Destrutor           
   virtual ~StackLE();   

   // Public Methods 
   bool isEmpty() { return top_ == 0L; }       
   bool isFull()  { return false; }       
   void push(int n);     
   int  pop();  
   int  top();
};
#endif