Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!think!harvard!seismo!brl-tgr!gwyn 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.