Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site asgb.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!sdcsvax!bmcg!asgb!gupta From: gupta@asgb.UUCP (Yogesh K Gupta) Newsgroups: net.lang.c Subject: Re: <=> and obfuscation Message-ID: <637@asgb.UUCP> Date: Mon, 11-Feb-85 11:53:48 EST Article-I.D.: asgb.637 Posted: Mon Feb 11 11:53:48 1985 Date-Received: Wed, 13-Feb-85 07:40:55 EST References: <7699@brl-tgr.ARPA> <1293@bbncca.ARPA> <7853@brl-tgr.ARPA> <805@sjuvax.UUCP> Organization: Burroughs Corp. ASG, Boulder Colo. Lines: 20 > > To exchange two items without an intermediate variable, try: > > > > b ^= a ^= b ^= a > > This works for integer variables only. In C, the ^ is a bitwise operator. Thus, b ^= a ^= b ^= a will exchange the bit patterns in the two variables. As long as the two variables are of the SAME type, the values will be swapped. As to the efficiency and programming style ... -- Yogesh Gupta Advanced Systems Group, {sdcrdcf, sdcsvax}!bmcg!asgb!gupta Burroughs Corp., Boulder, CO. -------------------------------------------------------------------- All opinions contained in this message are my own and do not reflect those of my employer or the plant on my desk.