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From: nick@cs.edinburgh.ac.uk (Nick Rothwell)
Newsgroups: comp.sys.mac.programmer
Subject: Re: THINKC 4.0.2 #define is short
Keywords: #define preprocessor short int <<
Message-ID: <1892@skye.cs.ed.ac.uk>
Date: 14 Nov 90 13:13:33 GMT
References: <2374@moscom.UUCP>
Sender: nnews@cs.ed.ac.uk
Reply-To: nick@lfcs.ed.ac.uk
Organization: Wavetables 'R' Us
Lines: 25

In article <2374@moscom.UUCP>, tcm@moscom.UUCP (Tom Maszerowski) writes:
> 
> Here's a gotcha in THINK C 4.0.2 that got me.  It's probably in the
> manual somewhere, but a cursory galnce didn't reveal it ( I couldn't
> find any reference to #define or the preprocessor anywhere in the index).
> Anyway, this is what happened:
> 
> given:
> 
> #define   MaxAllocation  (1<<16)
> 
> sets MaxAllocation to 0.  

Er, no, the #define is just textual substitution. It doesn't know about
ints, longs, or anything (perhaps besides comments and newlines and stuff
for macro parameter substitution).

I think "1<<16", in isolation, is meaningless in THINK C (well, it's 0).
Try "1L << 16" or something.

-- 
Nick Rothwell,	Laboratory for Foundations of Computer Science, Edinburgh.
		nick@lfcs.ed.ac.uk    <Atlantic Ocean>!mcsun!ukc!lfcs!nick
~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~ ~~
 "Now remember - and this is most important - you must think in Russian."