Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!csd4.milw.wisc.edu!bionet!agate!hughes@math.Berkeley.EDU
From: hughes@math.Berkeley.EDU (Eric Hughes)
Newsgroups: comp.sys.ibm.pc
Subject: Re: calendar code
Message-ID: <25831@agate.BERKELEY.EDU>
Date: 28 Jun 89 03:41:30 GMT
References: <82362@ti-csl.csc.ti.com>
Sender: usenet@agate.BERKELEY.EDU
Reply-To: hughes@math.Berkeley.EDU (Eric Hughes)
Organization: UCB Mathematics Department
Lines: 16
In-reply-to: Donahue@TILDE (Them bats is smart; they use radar!)

In article <82362@ti-csl.csc.ti.com>, Donahue@TILDE (Them bats is smart; they use radar!) writes:
>
>I'm looking for a Turbo C function that, when given
>an arbitrary date, will return the day of the week that the date
>falls on.

DOS call 42 (2A hex), which gets the date, also returns the day of the
week in register CX.  So first get the current date and save it, then
set the date, get the date, get your answer, and reset the date.  The
DOS set date call is 43 (2B hex).

I don't do this myself, but the idea is from Peter Norton's book
_Programmer's Guide to the IBM PC_.

Eric Hughes
hughes@math.berkeley.edu   ucbvax!math!hughes