Xref: utzoo comp.lang.c:6303 comp.sys.m68k:659
Path: utzoo!utgpu!water!watmath!clyde!bellcore!faline!ulysses!allegra!princeton!udel!gatech!purdue!umd5!brl-adm!brl-smoke!gwyn
From: gwyn@brl-smoke.UUCP
Newsgroups: comp.lang.c,comp.sys.m68k
Subject: Re: C machine
Message-ID: <7109@brl-smoke.ARPA>
Date: 16 Jan 88 08:47:41 GMT
References: <461@auvax.UUCP> <9961@mimsy.UUCP> <166@teletron.UUCP> <6936@brl-smoke.ARPA> <147@ateng.UUCP> <39aca826.7f32@apollo.uucp> <7092@brl-smoke.ARPA> <708@umbc3.UMD.EDU>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 9
Posted: Sat Jan 16 03:47:41 1988

In article <708@umbc3.UMD.EDU> alex@umbc3.UMD.EDU (Alex S. Crain) writes:
>Fix? How pray tell would you fix it? make it machine dependent? or just
>arbitrary? 

It should be obvious what to do if you think about it.

First, only pointers into the same object can meaningfully be subtracted.
Second, the result of the subtraction necessarily has implementation-
defined signed integral type; there is a typedef ptrdiff_t in <stddef.h>.