From owner-freebsd-chat  Wed Mar 25 01:58:06 1998
Return-Path: <owner-freebsd-chat@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id BAA11310
          for freebsd-chat-outgoing; Wed, 25 Mar 1998 01:58:06 -0800 (PST)
          (envelope-from owner-freebsd-chat@FreeBSD.ORG)
Received: from ren.dtir.qld.gov.au (firewall-user@ns.dtir.qld.gov.au [203.108.138.66])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id BAA11251;
          Wed, 25 Mar 1998 01:57:58 -0800 (PST)
          (envelope-from syssgm@dtir.qld.gov.au)
Received: by ren.dtir.qld.gov.au; id TAA24784; Wed, 25 Mar 1998 19:56:43 +1000 (EST)
Received: from ogre.dtir.qld.gov.au(167.123.8.3) by ren.dtir.qld.gov.au via smap (3.2)
	id xma024779; Wed, 25 Mar 98 19:56:14 +1000
Received: from troll.dtir.qld.gov.au (troll.dtir.qld.gov.au [167.123.8.1])
	by ogre.dtir.qld.gov.au (8.8.7/8.8.7) with ESMTP id TAA08866;
	Wed, 25 Mar 1998 19:55:54 +1000 (EST)
Received: from localhost (syssgm@localhost)
	by troll.dtir.qld.gov.au (8.8.5/8.8.5) with SMTP id TAA13470;
	Wed, 25 Mar 1998 19:55:58 +1000 (EST)
Message-Id: <199803250955.TAA13470@troll.dtir.qld.gov.au>
X-Authentication-Warning: troll.dtir.qld.gov.au: syssgm@localhost didn't use HELO protocol
To: "Jonathan M. Bresler" <jmb@FreeBSD.ORG>
cc: freebsd-chat@FreeBSD.ORG
Subject: Re: y2k
Date: Wed, 25 Mar 1998 19:55:58 +1000
From: Stephen McKay <syssgm@dtir.qld.gov.au>
Sender: owner-freebsd-chat@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

Jonathan M. Bresler wrote:
>Swerda wrote:
>> i dont believe 2000 is a leap year

I just close my eyes and wish!

http://www.ast.cam.ac.uk/RGO/leaflets/leapyear/leapyear.html is brief, but
informative, including a bit of the history of calendars.

>> a leap year is divisible EVENLY BY 4
>> except NOT one divisible by 400
>
>	2000 is a leap year.
>
>	if  (year % 400 == 0 || 
>	    (year % 100 != 0 && year % 4 == 0))
>		printf("leap year\n");

But, of course, for that little bit of efficiency, you should code it:

	if (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0))
	    printf("leap year\n");

so that for 3 out of 4 years only one division and comparison is done.


Stephen.

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-chat" in the body of the message