//
//   This file contains the C# code from Program 6.20 of
//   "Data Structures and Algorithms
//    with Object-Oriented Design Patterns in C#"
//   by Bruno R. Preiss.
//
//   Copyright (c) 2001--2002 by Bruno R. Preiss, P.Eng.  All rights reserved.
//
//   http://www.brpreiss.com/books/opus6/programs/pgm06_20.txt
//
public class Algorithms
{
    public static void BreadthFirstTraversal(Tree tree)
    {
	Queue queue = new QueueAsLinkedList();
	queue.Enqueue(tree);
	while (!queue.IsEmpty)
	{
	    Tree t = (Tree)queue.Dequeue();
	    Console.WriteLine(t.Key);
	    for (int i = 0; i < t.Degree; ++i)
	    {
		Tree subTree = t.GetSubtree(i);
		queue.Enqueue(subTree);
	    }
	}
    }
}