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Date: Thu, 12 Mar 2009 14:29:27 +0100
From: Olivier Scalbert <olivier.scalbert@algosyn.com>
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Subject: Newbie question
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Date: 2009-03-12T14:29:27+01:00
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Hello,

I start learning Ada and I try to define types for a chess engine.

I have create some "obvious" types:

     type Color_T is (White, Black);

     type PieceType_T is (Pawn, Knight, Bishop, Rook, Queen, King);

     type Piece_T is record
         Color: Color_T;
         PieceType: PieceType_T;
     end record;


Now, I want to create an array of 64 squares representing the chess 
board. A square should contain nothing or a Piece_T

I have tried:

     type Board_T is array(1..64) of Piece_T;

But I can not have an empty square !

What is the best way of doing that ?

Thanks,

Olivier