Article View: comp.std.c
Article #1363Re: Questions about NCEG
From: Henry Spencer
Date: Fri, 01 Jun 1990 19:29
Date: Fri, 01 Jun 1990 19:29
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In article <8846@celit.fps.com> ps@fps.com (Patricia Shanahan) writes: >Fortran users and implementers generally seem to take floating point types >far more seriously than typical C users and implementers. If distinguishing >-0.0 from 0.0 is such a good thing, why is it so expressly prohibited, not >just in early Fortran standards, but in the draft for the next Fortran >standard? Don't overlook the possibility of sheer ignorance. Most Fortran users work on non-IEEE machines, and for that matter most of them (in my rather limited contacts with them) really do not understand the fine points of floating-point arithmetic particularly well. Don't confuse Fortran programmers with competent numerical analysts; the latter group is a small subset of the former. Note, by the way, a point of confusion: as I understand it, IEEE FP does very specifically mandate that -0 compare equal to +0. The distinction between the two is significant only in unusual circumstances. -- As a user I'll take speed over| Henry Spencer at U of Toronto Zoology features any day. -A.Tanenbaum| uunet!attcan!utzoo!henry henry@zoo.toronto.edu
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Newsgroups: comp.std.c Path: arc1-ca.pugleaf.net!utzoo!henry From: henry@utzoo.uucp (Henry Spencer) Subject: Re: Questions about NCEG Message-ID: <1990Jun1.192909.8952@utzoo.uucp> Organization: U of Toronto Zoology References: <1990May29.193451.6533@twinsun.com> <13016@smoke.BRL.MIL> <1990May30.205436.11534@twinsun.com> <13028@smoke.BRL.MIL> <8846@celit.fps.com> Date: Fri, 1 Jun 90 19:29:09 GMT