Creating the Game class (15-Nov-1995)

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Context

We now have three classes of our monopoly game. Two classes reflecting real components of the game, and one base class from which they are derived. This is often expressed in a class hierarchy diagram.

Base
 |___Account
 |___Dice

The Base class represents our general requirements we have for all objects in our monopoly game. An Account is a monopoly object. The Dice class is a monopoly object.

Exercise

We would like to represent the whole game as one object called Game. Currently, we have coded only two game components, so our monopoly game will be a very small one. The Game object has a Dice object, and it also has an Account object. Obviously, the Game object is a monopoly object, so it should be derived from Base.

Make sure you have working code for the three classes Base, Dice and Account from the previous exercises.

Use the following main.C:

#include "Game.h"

main()
{
  Game game;

  game.read();
  game.write();
}

Write the header file Game.h and it's implementation file Game.C. Remember that Game inherits from Base, and should define the readContents and writeContents member functions. Note that the implementation of these functions should be as simple as possible (all member functions should consist of 2 (two) statements at most) and should use the interface defined in the previous exercise.
Compile and test your program with the following input file. The output file should be similar to the input file.
```
Game
  Dice 3 5 end
  Account 300 end
end
```
The output should be reusable as input. Call the executable monopoly, and use the following command:
```
% monopoly <inputfile | monopoly >outputfile
```
This pipes the output of the first monopoly process into the second monopoly process. This should produce an output file similar to the input file.

Finished Early?

You should start looking at the manual pages for aegis. You might also want to look at User's Guide.

Add the following line to your .cshrc file:

source /public/u-aizu/lib/aegis/cshrc

Try out commands like ael p...

Look up what the .aegisrc file should contain for your project.

Christian Goetze