// Chap 6, pp 263 - 264
// Rename this file as StackP.h

// *********************************************************
// Header file StackP.h for the ADT stack.
// Pointer-based implementation.
// *********************************************************

#ifndef STYPE
typedef int stackItemType;  // desired-type-of-stack-item
#define STYPE
#endif

struct stackNode;  // defined in implementation file
typedef stackNode* ptrType;  // pointer to node

#include "boolean.h"

class stackClass
{
public:
// constructors and destructor:
   stackClass();                     // default constructor
   stackClass(const stackClass& S);  // copy constructor
   ~stackClass();                    // destructor

// stack operations:
   boolean StackIsEmpty();
   void Push(stackItemType NewItem, boolean& Success);
   void Pop(boolean& Success);
   void GetStackTop(stackItemType& StackTop, 
		    boolean& Success);

private:
   ptrType TopPtr;  // points to top of stack
};  // end class
// End of header file.