Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!nrl-cmf!ukma!gatech!gitpyr!edp
From: edp@pyr.gatech.EDU (Warren Tucker)
Newsgroups: comp.lang.c
Subject: Re: Unnecessary Macros (was Re: Unnecessary Parenthesis)
Message-ID: <6500@pyr.gatech.EDU>
Date: 4 Oct 88 22:08:48 GMT
References: <2089@ssc-vax.UUCP> <441@kaon.uchicago.edu> <1401@devsys.oakhill.UUCP> <23@datcon.UUCP> <8577@smoke.ARPA> <8078@haddock.ima.isc.com> <8590@smoke.ARPA> <701@accelerator.eng.ohio-state.edu>
Reply-To: edp@pyr.UUCP (Warren Tucker)
Organization: Georgia Institute of Technology
Lines: 17

In article <701@accelerator.eng.ohio-state.edu> rob@kaa.eng.ohio-state.edu (Rob Carriere) writes:
>How about the following, deep in some inner loop:
>foo = square( sin( x )) + 1.7;
>I *don't* want to write:
>foo = sin( x )*sin( x ) + 1.7;
>and
>temp = sin( x );
>foo = temp*temp + 1.7;
>is clearly less legible.
>
>Rob Carriere
It may be less legible to use 'temp' but sin(x)*sin(x) calculates the
sine of x twice.

-- 
Warren Tucker
...!{akgua,allegra,amd,hplabs,ihnp4,seismo,ut-ngp}!gatech!gitpyr!edp