Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!bu-cs!buengc!bph
From: bph@buengc.BU.EDU (Blair P. Houghton)
Newsgroups: comp.std.c
Subject: Re: null pointers of various types.
Message-ID: <2399@buengc.BU.EDU>
Date: 27 Mar 89 17:40:29 GMT
References: <7672@june.cs.washington.edu>
Reply-To: bph@buengc.bu.edu (Blair P. Houghton)
Followup-To: comp.std.c
Organization: Boston Univ. Col. of Eng.
Lines: 14

In article <7672@june.cs.washington.edu> pardo@cs.washington.edu (David Keppel) writes:
>I recently made the following assertions about pANSI C.
>Are they correct?
>
>* The number zero (0) compares equal with any null pointer of any type.
>* Null pointers of two types do not necessarily compare equal.

If this is true, how long will it be until someone accidentally uses
this fact to prove that one can violate the first and second laws of
thermodynamics?

				--Blair
				  "...since the zeroth is apparently
				   conditional on data typing..."