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From: pdg@ihdev.UUCP (P. D. Guthrie)
Newsgroups: net.lang.c
Subject: Re: Calendar Functions (simpler leap year calculation)
Message-ID: <886@ihdev.UUCP>
Date: Sun, 14-Sep-86 17:09:14 EDT
Article-I.D.: ihdev.886
Posted: Sun Sep 14 17:09:14 1986
Date-Received: Mon, 15-Sep-86 20:36:56 EDT
References: <206@cascade.STANFORD.EDU> <1229@loral.UUCP> <34@vianet.UUCP>
Reply-To: pdg@ihdev.UUCP (55224-P. D. Guthrie)
Distribution: net.lang.c
Organization: American Nasal Amputation Centre
Lines: 10

>Or if you want a simple cpp macro:
>
>#define  isleapyear(year)   ((year)%4)
>
>Bob Devine

Or if you want a complex cpp macro
to return the number of days in a year......

#define num_day(x) ((x)%4 ? (x)%100 ? (x)%400 ? 366 : 355 : 356 : 355)