Re: Calculating ages

Article View: comp.lang.prolog

Article #1066

#1066

From: Richard A. O'Keefe
Date: Sun, 19 Aug 1990 23:09

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In article <982@christopher-robin.cs.bham.ac.uk>, cjr@cs.bham.ac.uk (Chris Ridd <RiddCJ>) writes:
> Does anyone know how to calculate a person's age in Prolog (well, any
> language will do)?  We are given today's date and their birthday, and
> need the answer in years, weeks and days.

Look in the book Numerical Recipes, specifically at JULDAT.
Or, if you have Quintus Prolog, use library(date).

By the way, the answer in "years, weeks, and days" is not well defined.
Presumably you mean "subtract the birth date from the last birthday,
taking that as _calendar_ years, and take weeks and days since the last
birthday".  With that definition (completed years + time since last
birthday) you only need to worry about whether the current and previous
years were leap years.

-- 
The taxonomy of Pleistocene equids is in a state of confusion.

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!munnari.oz.au!goanna!ok
From: ok@goanna.cs.rmit.oz.au (Richard A. O'Keefe)
Newsgroups: comp.lang.prolog,comp.lang.misc
Subject: Re: Calculating ages
Message-ID: <3583@goanna.cs.rmit.oz.au>
Date: 19 Aug 90 23:09:33 GMT
References: <982@christopher-robin.cs.bham.ac.uk>
Followup-To: comp.lang.prolog
Organization: Comp Sci, RMIT, Melbourne, Australia
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