//            File: btnode.cpp
// Original Author: David Metcalf
//   Last Modified: Spring 2000
//           Topic: Binary Tree
// -----------------------------------------------------
//
// OVERVIEW:
// Implementation of tree node methods.

#include <iostream.h>
#include "btnode.h"

//------------------------------------------------------------
// BTNode::BTNode constructors
//
// Creates BTNode and (optionally) initializes it to contain "item".
// There are 2 constructors: one can be invoked without an argument
// and one takes a single argument.
//
// Note: Defining a class method with two different parameter lists is
// called "function overloading".  The method actually invoked is the one
// whose parameters match.

BTNode::BTNode()
{
  lChild = NULL;
  rChild = NULL;
}

BTNode::BTNode(ItemType item)
{
  lChild = NULL;
  rChild = NULL;
  data = item;
}

//------------------------------------------------------------
// BTNode::getData
// Usage: item = node.getData();
//
// Returns data stored in node.

ItemType BTNode::getData() const
{

}

//------------------------------------------------------------
// BTNode::getLeftChild
// Usage: nptr = node.getLeftChild();
//
// Returns pointer to left child.

BTNode *BTNode::getLeftChild() const
{

}

//------------------------------------------------------------
// BTNode::getRightChild
// Usage: nptr = node.getRightChild();
//
// Returns pointer to right child.

BTNode *BTNode::getRightChild() const
{

}

//------------------------------------------------------------
// BTNode:setData
// Usage: node.setData(item);
//
// Sets/changes data stored in node.

void BTNode::setData(ItemType item)
{

}

//------------------------------------------------------------
// BTNode::setLeftChild:
// Usage:  node.setLeftChild(nptr);
// sets/changes left child of node

void BTNode::setLeftChild(BTNode *nptr)
{

}

//------------------------------------------------------------
// BTNode::setRightChild
// Usage: node.setRightChild(nptr);
//
// Sets/changes right child of node.

void BTNode::setRightChild(BTNode *nptr)
{

}