Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!uunet!mcvax!ukc!etive!lfcs!nick
From: nick@lfcs.ed.ac.uk (Nick Rothwell)
Newsgroups: comp.sys.mac.programmer
Subject: LSC arithmetic problem
Message-ID: <1837@etive.ed.ac.uk>
Date: 24 Apr 89 14:36:53 GMT
Sender: news@etive.ed.ac.uk
Reply-To: nick@lfcs.ed.ac.uk (Nick Rothwell)
Organization: LFCS Enya Admiration Society
Lines: 19

Well, perhaps not a problem, but certainly a "gotcha". The following
declaration:

	long L = (1<<16) + 1;

results in L being (long) 1. Presumably LSC does its intermediate arithmetic
in 16-bit ints, so I'd have to say something like:

	long L = ((long)1 << 16) + 1

to enforce long intermediate values. But, this is a bit of a gotcha, and I
couldn't find any "beware of the leopard" paragraphs in the LSC manual where
it talks about portability.

		Nick.
Nick Rothwell,	Laboratory for Foundations of Computer Science, Edinburgh.
		nick@lfcs.ed.ac.uk    <Atlantic Ocean>!mcvax!ukc!lfcs!nick
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               Fais que ton reve soit plus long que la nuit.