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From: gwyn@brl-tgr.ARPA (Doug Gwyn )
Newsgroups: net.lang.c
Subject: Re: if(p)
Message-ID: <1899@brl-tgr.ARPA>
Date: Thu, 3-Oct-85 19:31:40 EDT
Article-I.D.: brl-tgr.1899
Posted: Thu Oct  3 19:31:40 1985
Date-Received: Sat, 5-Oct-85 07:29:51 EDT
References: <1671@brl-tgr.ARPA> <516@talcott.UUCP> <2245@ukma.UUCP>
Organization: Ballistic Research Lab
Lines: 5

> I disagree...  Pointers have VALID and INVALID values.  So when you
> say if(p) you're asking if it has a VALID or INVALID value.  It's
> just that conveniently most machines have 0 as the INVALID value.

So if p is non-NULL, it is valid, eh?  Chuckle, chuckle.