// ArrayStack.h
// wdg 2009
#ifndef ARRAYSTACK_H
#define ARRAYSTACK_H

const int MAX_STACK = 100;
typedef int StackType;
const StackType ERROR = -1;

class ArrayStack  
{
  public:
     ArrayStack( );               // constructor
     void push(StackType item);   // pushes object onto stack
     bool isEmpty() const;        // returns whether stack is empty or not
     StackType pop();             // pops top element from stack
     StackType peek() const;      // returns value of data on top of stack
     void dump() const;           // outputs representation on stdout
 
  private:
     StackType arr[MAX_STACK];    // stores data
     int count;                   // number of elements in stack
     // note that valid data always in 0..count-1
};
#endif