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From: dhesi@bsu-cs.UUCP (Rahul Dhesi)
Newsgroups: comp.lang.c
Subject: Re: Expressions compared to zero in *c*
Message-ID: <1154@bsu-cs.UUCP>
Date: Tue, 15-Sep-87 10:19:25 EDT
Article-I.D.: bsu-cs.1154
Posted: Tue Sep 15 10:19:25 1987
Date-Received: Thu, 17-Sep-87 05:44:43 EDT
References: <374@mcdsun.UUCP> <766@maccs.UUCP>
Reply-To: dhesi@bsu-cs.UUCP (Rahul Dhesi)
Organization: CS Dept, Ball St U, Muncie, Indiana
Lines: 8
Summary: trap on overflow

In article <766@maccs.UUCP> gordan@maccs.UUCP (Gordan Palameta) writes:
>However, if the comparison is done as  a - b > 0, everything magically
>works thanks to the properties of two's complement arithmetic under
>overflows.

...Except if the hardware causes a trap when a signed quantity overflows.
-- 
Rahul Dhesi         UUCP:  <backbones>!{iuvax,pur-ee,uunet}!bsu-cs!dhesi