#include "BinaryNode.h"
class BinaryTree {
private:
BinaryNode *root;
friend class BinarySearchTree;
static void deleteTree(BinaryNode *root);
public: // class BinaryTree (cont)
BinaryTree( ) { root = NULL; }
BinaryTree(int el) { root = new BinaryNode(el); }
~BinaryTree() { deleteTree(root); root = NULL; }
// functions
BinaryNode *getRoot( ) { return root; }
bool isEmpty( ) { return root == NULL; }
int size( ) { return (root == NULL) ? 0 :
root->size(root); }
int height( ) { return (root == NULL) ? 0 :
root->height(root); }
void copy(BinaryTree& rhs) {
if (this != &rhs) {
deleteTree(root); // make tree empty
if (rhs.root != NULL) root = rhs.root->copy(); }
}







};