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From: gwyn@brl-tgr.ARPA (Doug Gwyn )
Newsgroups: net.lang.c
Subject: Re: if (p), where p is a pointer
Message-ID: <1456@brl-tgr.ARPA>
Date: Thu, 12-Sep-85 20:44:18 EDT
Article-I.D.: brl-tgr.1456
Posted: Thu Sep 12 20:44:18 1985
Date-Received: Sun, 15-Sep-85 11:48:41 EDT
References: <118@mit-hector.UUCP>
Organization: Ballistic Research Lab
Lines: 12

> 	if (ptr)
is perfectly okay

> 	if (ptr != NULL)
is also okay and may be better style

NULL is #defined in  and other places as 0.
Do not confuse NULL (or its macro expansion, 0) with
a null pointer.  NULL is an integer constant (after
macro expansion).

Are you confused yet?