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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,9b4538cfeb0c3576 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII From: Jacob Sparre Andersen Newsgroups: comp.lang.ada Subject: Re: Float conversion Date: Thu, 29 Jul 2010 14:44:28 +0200 Organization: Jacob Sparre Andersen Message-ID: <87tynisbir.fsf@hugsarin.sparre-andersen.dk> References: <9e669a3b-1013-4bd1-b372-5f7dfa46d083@f42g2000yqn.googlegroups.com> NNTP-Posting-Host: 78.156.222.73.bredband.3.dk Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: munin.nbi.dk 1280407469 16514 78.156.222.73 (29 Jul 2010 12:44:29 GMT) X-Complaints-To: news@jacob-sparre.dk NNTP-Posting-Date: Thu, 29 Jul 2010 12:44:29 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) Cancel-Lock: sha1:48lBJcbW/1vgrmkinUUpqzZru40= Path: g2news1.google.com!news1.google.com!news3.google.com!proxad.net!feeder1-2.proxad.net!feed.ac-versailles.fr!news.ecp.fr!news.jacob-sparre.dk!pnx.dk!not-for-mail Xref: g2news1.google.com comp.lang.ada:12660 Date: 2010-07-29T14:44:28+02:00 List-Id: Henrique wrote: > Why var4 is not equal var1? > type My_Float is digits 6; > > CONVERSION_CONSTANT : constant My_Float := 6076.11; > CONVERSION_CONSTANT2 : constant My_Float := 1.0 / CONVERSION_CONSTANT; > > var3: My_Float := var2/CONVERSION_CONSTANT; > var4: My_Float := var2*CONVERSION_CONSTANT2; Basically because the relative precision of My_Float is limited to 1e-6. In general "=" does not make much sense for floating point types. Cheers, Jacob -- Jacob Sparre Andersen Research & Innovation Vesterbrogade 148K, 1. th. 1620 K�benhavn V Danmark Phone: +45 21 49 08 04 E-mail: jacob@jacob-sparre.dk Web-sted: http://www.jacob-sparre.dk/