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Newsgroups: comp.lang.java.advocacy,comp.object,comp.lang.ada
Subject: Re: Using Ada for device drivers? (Was: the Ada mandate, and why
 it collapsed and died)
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Xref: archiver1.google.com comp.lang.java.advocacy:63542 comp.object:63222
 comp.lang.ada:37215
Date: 2003-05-12T01:04:27+00:00
List-Id: <comp.lang.ada>

Hyman Rosen wrote:

> Okay, thanks. Since not all Ada programmers are the author of random
> number generators for Ada compilers, you should agree that this is an
> issue that can be overlooked, and could produce incorrect results that
> would not be caught by Ada language facilities.

It was just that I had stated that the only reason for writing this 
program was to use it to explain the rationale for generating 
permutations this way.

> And by the way...
>  > type Suits is (...);
>  > type Ranks is (...);
>  > Deck: Card_Array(0..51);
> 
> What's up with that 51? Shouldn't that be a calculation based on the
> Suits'Last'Pos and Ranks'Last'Pos?

Good, question, I think the answer is a judgement call.  I could have 
written:

    Deck: Card_Array(0..(Suits'Last'Pos+1)*(Ranks'Last'Pos+1)-1);

But I think the way I chose was more obviously correct, and easier to 
maintain, even if someone wanted to change the code to play Pinochle.