Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!novavax!twwells!bill
From: bill@twwells.com (T. William Wells)
Newsgroups: comp.lang.c
Subject: Re: Random number generator
Keywords: random maxint
Message-ID: <1989Dec24.174933.679@twwells.com>
Date: 24 Dec 89 17:49:33 GMT
References: <83943@linus.UUCP> <4943@condict.cs.vu.nl>
Organization: None, Ft. Lauderdale, FL
Lines: 20

In article <4943@condict.cs.vu.nl> condict@cs.vu.nl (Michael Condict) writes:
: Generate the two 16-bit numbers and concatenate them:
:
:       long_random = (short_random_1 << 16) + short_random_2;
:
: Or, if you prefer:
:
:       long_random = short_random_1 * 65536 + short_random_2;

In both cases, safety requires a cast:

	long_random = ((unsigned long)short_random_1 << 16) + short_random_2;
	long_random = (unsigned long)short_random_1 * 65536 + short_random_2;

Else the first time you compile on a machine with 16 bit ints,
you'll get a surprise.

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Bill                    { uunet | novavax | ankh | sunvice } !twwells!bill
bill@twwells.com