/* File: C++Examples/Stacks/array_stack.h */
#include <iostream>
#include "stack.h"

/* This is the Data Structure used to implement the stack:
   array[top-1] is the last element entered, array[0] the first */

class array_stack : public stack {
   int top;
   int array[20];
public:
   array_stack () : top(0) {}
   bool is_empty(void) const;
   void push(int);
   int  pop(void);
   stack* clone(void) const;
   ~array_stack() {}
};