From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID
	autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,a30e9cc47b5029fe
X-Google-Attributes: gid103376,public
From: Gautier <Gautier.deMontmollin@maths.unine.ch>
Subject: Re: ratioanl number type
Date: 1999/12/03
Message-ID: <38478F43.1690EFFA@maths.unine.ch>#1/1
X-Deja-AN: 556140507
Content-Transfer-Encoding: 7bit
References: <38473D8A.9BB68676@gte.net>
X-Accept-Language: en
Content-Type: text/plain; charset=us-ascii
MIME-Version: 1.0
Newsgroups: comp.lang.ada
Date: 1999-12-03T00:00:00+00:00
List-Id: <comp.lang.ada>

> Are there any Ada95 examples in books or on the web that implement the
> exact rational number data type with overloading of all appropriate
> arithmetic operations and conversion to and from other number types, all
> in Ada95 without anything relating to the platform it will run on? It
> goes without saying that it is too difficult to predict the number of
> digits that the numerator and denominator need to have, so, available
> memory should be the only limit to their size.

A thing to do is to combine a generic code to obtain the fraction
field of an (euclidean) ring, with multi-precision integers,
so you can choose the two component independently.

All ingredients are there

  http://lglwww.epfl.ch/Team/MW/mw_components.html

You can also take my generic code (frac) in mathpaqs.zip

  http://members.xoom.com/gdemont/gsoft.htm

and use one of the multi-precision packs from there

  http://members.xoom.com/gnatlist/

NB: no bug-free warranty in any I think ... ;-)

HTH

-- 
Gautier