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Software ==>	Visual C# (55 exercises)
Topic ==>	Data structures (6 exercises)
Level ==>	Harder than average
Subject ==>	C# training

Use a Stack and two classes to play the Tower of Hanoi game

This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.

This is one to attempt only if you're already comfortable using classes in C#!

In the Tower of Hanoi, the aim is to get all the discs from the left pole to the right:

Tower of Hanoi - start

Starting to play the Tower of Hanoi.

The rules are that you can only move the top-most disc in each pile, and you can only put a disc on one which is bigger than it:

Tower of Hanoi in action

A game in progress!

Create your own Tower of Hanoi game. The answer given uses the following two classes:

Class	What it represents
Pole	A stack of discs
Disc	A single disc on a pole

The answer makes the discs clickable buttons. You can click with the left or right mouse button on each disc to move it to one of the other two poles. To attach an event-handler to a dynamically-created button:

// assign event-handler to pick up right and left mouse clicks

b.MouseDown += new MouseEventHandler(MouseDown);

The event-handler would then begin:

private void MouseDown(object sender, MouseEventArgs e)

You may prefer to use a different algorithm to solve this, although the idea of having a stack for each pole seems to work well.

When youi've finished, you could compare your answer with the given one ...

You can unzip this file to see the answers to this exercise, although please remember this is for your personal use only.

You can find other training resources for the subject of this exercise here:

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