Calculating day length

[Pedro J. Aphalo]

Some weeks ago there was a query on how to calculate day length.
Yesterday I wrote a program that does exactly that, so I thought
that who posted that query (I no longer have his/her name) and
hopefully others may find it useful.

I have made available an executable for MS-DOS (80206 or better,
with coprocessor) and the C++ source code at the following URL:

http://www.joensuu.fi/~aphalo/pub/daylen/

Pedro.

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 Pedro J. Aphalo
 University of Joensuu, Faculty of Forestry
 P.O. Box 111, FIN-80101 Joensuu, FINLAND
 e-mail: aphalo at cc.joensuu.fi
 http://www.joensuu.fi/~aphalo/
 fax: +358 73 151 4444 (or +358 73 151 3590)
 tel: +358 73 151 4406                      ,,,^..^,,,
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