Path: utzoo!utgpu!water!watmath!clyde!rutgers!mit-eddie!uw-beaver!uw-june!pardo
From: pardo@june.cs.washington.edu (David Keppel)
Newsgroups: comp.lang.c
Subject: Re: "logical" xor
Message-ID: <4026@june.cs.washington.edu>
Date: 21 Jan 88 00:03:26 GMT
References: <2946@zeus.TEK.COM> <170@illusion.UUCP> <39a83409.ae48@apollo.uucp>
Reply-To: pardo@uw-june.UUCP (David Keppel)
Distribution: comp.lang.c
Organization: Apollo Computer, Chelmsford, MA
Lines: 18


( From: Ken Arnold <apollo!arnold@beaver> )
<3986@uw-june.cs.washington.edu> pardo@uw-june.UUCP (David Keppel) writes:
>
>[Ken Arnold says: (a != b) could evaluate to 7 ]
>
>Unless this has been changed from K&R in ANSI, (a != b) must evaluate to 0
>or 1.  Check K&R Appendix A, Sections 7.6, 7.7, 7.11, 7.12.  Relational,
>equality, and logical AND and OR are guaranteed by this section to return
>only 0 and 1.
>
>	;-D on  (And it isn't even my copy of K&R!)  Pardo

Pardon me.  I should have been clearer.  I have *used* compilers where this
was the case.  It is not K&R; I was picking a real-world nit, not an ansii
nit, and should have said so clearly.  My mistake.

		Ken Arnold