#ifndef _AVL_H_
#define _AVL_H_

#include <iostream.h>
#include <stdlib.h>

template<class T>
class AVL {
private:
	struct node
	{
		T info;
		struct node *left;
		struct node *right;
	};

public:
	AVL( );
	void Insert( T x );
	void InOrder( void );

private:
	void InOrderHelper( node *runner );	
	node *root;
};

template<class T>
AVL<T>::AVL( )
{
	root = NULL;
}

template<class T>
void AVL<T>::Insert( T x )
{
	node *temp;
	temp = new node<T>;
	temp->info = x;
	temp->left = NULL;
	temp->right = NULL;

	if( root == NULL )
		root = temp;
	else
	{
		node *runner;
		node *trail;
		
		runner = root;
		
		while( runner != NULL )
		{
			trail = runner;
			if( x <= runner->info )
				runner = runner->left;
			else
				runner = runner->right;
		}

		if( x <= trail->info )
			trail->left = temp;
		else
			trail->right = temp;
	}
}
	
template<class T>
void AVL<T>::InOrder( void )
{
	InOrderHelper( root );
}

template<class T>
void AVL<T>::InOrderHelper( node *runner )
{
	if( runner != NULL )
	{
		InOrderHelper( runner->left );
		cout << runner->info << " ";
		InOrderHelper( runner->right );
	}
}	

#endif