#ifndef stack_h
#define stack_h

#define MAX 50

typedef int TPELEM;

class Stack {
  friend class StackIterador;
  private:
	  int    top;
	  TPELEM elems[MAX];
  public:
	  void   push( int i );
	  int    pop( void );
	  int    empty( void );
	  static class Stack* create(void);
};



inline void Stack::push(TPELEM i)
{
	elems[top++] = i;
}

inline TPELEM  Stack::pop(void)
{
  return elems[--top];
}

inline int  Stack::empty( void )
{
  return top == 0;
}

class StackIterador {
  private:
		int indCorr;
		class Stack* pPilhaCorr;
  public:
		int    fim( void );
		TPELEM prox( void );
		void   percorrePilha( void );
		void   init( class Stack *pPilha );
};


#endif