/*
 *        File: stack.cpp
 *        Author: David Metcalf
 *        Date:  February 2001
 *        Class: CS112
 *        Assignment: Implementation of stack module
 * -----------------------------------------------------
 */

#include <iostream>
#include "stack.h"      /* declarations of public functions */

/*------------------------------------------------------------*/

        /* Stack::Stack  constructor
        * creates stack and initializes it
        */

Stack::Stack()
{
count=0;
}

/*------------------------------------------------------------*/

       /* Stack::Init:
        * Usage:  stack.Init();
        * Initializes a stack.
        */
bool Stack::Init()
{
count=0;
return true;
}

/*------------------------------------------------------------*/

       /* Stack::IsEmpty:
        * Usage:  if(stack.IsEmpty()) {...}
        * checks whether a stack is empty.
        */
bool Stack::IsEmpty()
{ return(count==0); }

/*------------------------------------------------------------*/

       /* Stack::IsFull:
        * Usage:  if(stack.IsFull()) {...}
        * checks whether a stack is full.
        */
bool Stack::IsFull()
{ return(count==MAXSTACKSIZE); }

/*------------------------------------------------------------*/

       /* Stack::Push:
        * Usage:  flag= stack.Push(item);
        * pushes item onto stack.
        * returns true if successful.
        */

bool Stack::Push(ItemType Item)
{
if (IsFull()) { return(false); }

data[count]=Item;
count++;
return true;
}

/*------------------------------------------------------------*/

       /* Stack::Pop:
        * Usage:  flag= stack.Pop(Item);
        * Pops top item off stack.
        * Sets Item equal to the popped element.
        */

{
You need to implement this method. 
}

/* ----------- END OF FILE: stack.cpp ---------- */