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From: levy@ttrdc.UUCP (Daniel R. Levy)
Newsgroups: net.lang.c
Subject: Re: Calendar Functions (simpler leap year calculation)
Message-ID: <1194@ttrdc.UUCP>
Date: Tue, 16-Sep-86 19:38:21 EDT
Article-I.D.: ttrdc.1194
Posted: Tue Sep 16 19:38:21 1986
Date-Received: Wed, 17-Sep-86 08:16:49 EDT
References: <206@cascade.STANFORD.EDU> <1229@loral.UUCP> <34@vianet.UUCP> <886@ihdev.UUCP>
Distribution: net.lang.c
Organization: AT&T, Computer Systems Division, Skokie, IL
Lines: 22

In article <886@ihdev.UUCP>, pdg@ihdev.UUCP (P. D. Guthrie) writes:
>>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)
                                                       ^^^   ^^^   ^^^

Huh?
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