Path: utzoo!attcan!uunet!wuarchive!psuvax1!rutgers!cmcl2!phri!alanine.phri.nyu.edu!roy
From: roy@alanine.phri.nyu.edu (Roy Smith)
Newsgroups: comp.lang.c
Subject: Looking for "round towards 0" function.
Message-ID: <1989Dec17.160821.13219@phri.nyu.edu>
Date: 17 Dec 89 16:08:21 GMT
Sender: news@phri.nyu.edu (News System)
Organization: Public Health Research Institute, NYC
Lines: 14


	I want to round a (possibly negative) double towards zero (ending
up with another double).  As far as I can tell, what I need to do is

	x2 = copysign (floor (fabs (x1))), x1);

but it seems like there should be a simplier way.  Is there?  If it helps,
I can guarantee that the integral part of the double will fit into an int
with no loss of precision (i.e. -90 <= x <= 90).
--
Roy Smith, Public Health Research Institute
455 First Avenue, New York, NY 10016
roy@alanine.phri.nyu.edu -OR- {att,philabs,cmcl2,rutgers,hombre}!phri!roy
"My karma ran over my dogma"