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From: cca04@.uk.ac.keele (P.J. Mitchell)
Newsgroups: comp.sys.transputer,comp.lang.fortran
Subject: Random numbers
Message-ID: <483@keele.keele.ac.uk>
Date: 23 Jul 90 13:11:19 GMT
Sender: news@seq1.keele.ac.uk
Organization: University of Keele, Keele, STAFFS. ST5 5BG
Lines: 18

I am using Meiko's mf77 and it doesn't come with a library of C-like
functions such as chdir, chown, mkdir etc. Therefore I have been
writing a small library of fortran wrappers for these routines to
ease calling them from fortran.

My problem is that C has the two routines srand and rand. The latter
returning an integer in the range 0-32767 (0 -> (2^15)-1). If I am
to maintain compatibility with other unix fortrans then I have to
make rand, drand and irand which are 31, 31 and 63 bits respectively.
How do I generate this accuracy from the 15 bit C rand routine that
the Sequent man pages say is used ?

Any help netters ?
--
--Paul Mitchell (CMA N.Cheshire, DoD#0145)      | Computer Centre,
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