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From: chris@umcp-cs.UUCP (Chris Torek)
Newsgroups: net.lang.c
Subject: Re: Shift by negative quantity
Message-ID: <2282@umcp-cs.UUCP>
Date: Sat, 5-Jul-86 13:24:45 EDT
Article-I.D.: umcp-cs.2282
Posted: Sat Jul  5 13:24:45 1986
Date-Received: Sun, 6-Jul-86 01:25:53 EDT
References: <894@bu-cs.UUCP>
Reply-To: chris@maryland.UUCP (Chris Torek)
Organization: University of Maryland, Dept. of Computer Sci.
Lines: 17

In article <894@bu-cs.UUCP> bzs@bu-cs.UUCP (Barry Shein) writes:
>Question: Is shifting by a negative quantity defined (that is,
>probably means the other shift.) I could find no mention in K&R.

It is explicitly undefined.  K&R, Appendix A, \S 7.5, Shift Operators
(p. 189):

  The result is undefined if the right operand is negative, or greater
  than or equal to the length of the object in bits.

>P.S. Is this one of those questions that gets asked every 2 months?

No.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 1516)
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