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: 107079,c7637cfdf68e766 X-Google-Attributes: gid107079,public X-Google-Thread: f43e6,c7637cfdf68e766 X-Google-Attributes: gidf43e6,public X-Google-Thread: 103376,c7637cfdf68e766 X-Google-Attributes: gid103376,public X-Google-Thread: f8362,c7637cfdf68e766 X-Google-Attributes: gidf8362,public X-Google-Thread: 109d8a,c7637cfdf68e766 X-Google-Attributes: gid109d8a,public From: mheaney@ni.net (Matthew Heaney) Subject: Re: floating point comparison Date: 1997/07/30 Message-ID: #1/1 X-Deja-AN: 260835488 References: Distribution: inet Organization: Estormza Software Newsgroups: comp.lang.ada,sci.math.num-analysis,comp.software-eng,comp.theory,sci.math Date: 1997-07-30T00:00:00+00:00 List-Id: In article , dewar@merv.cs.nyu.edu (Robert Dewar) wrote: >As for when it makes sense to compare floating-point values for equality, >that is a matter for the programmer to understand. Floating-point arithmetic >on modern IEEE machines is not some kind of approximate hocus-pocus, it >is a well defined arithmetic systenm, with well defined, well behaved >results, in which equality has a perfectly reasonable meaning. OK, so if do this declare m1, m2 : slope; begin if m1 = m2 then and I'm using IEEE floating point types (I'm on a SUN box), can I assume that the lines are parallel? -------------------------------------------------------------------- Matthew Heaney Software Development Consultant (818) 985-1271