From: Niels Hald Pedersen (nhp@FORCE.dk)
Date: Wed 01 Dec 1999 - 13:10:53 IST
The preprocessor handles strings, so it inserts "(3*4)". The compiler, if smart enough, identifies 3*4 as a constant subexpression and replaces it with 12 (If is _really_ dumb, it may assume that operators are all alike and may all be handled as addition, thus replacing it with a 7). regards Niels HP, nhp@force.dk > -----Original Message----- > From: Clive Crous [mailto:ccrous@shoprite.co.za] > Sent: 1. december 1999 11:53 > To: linux-svgalib@vger.rutgers.edu > Subject: [OT] Fixed Point Math ( was Re: semicircle ) > > > hmmmm > > I thought #define's where "pre-processed" > ie > i want to do this: > --- > #define MYDEF (3*4) > --- > and when i use "MYDEF" in the code it must put in a "7" not a "(3*4)" > is there a way to do this ? > why should I have computations done at run time, when they > could be done at > compile time > > thanks again > Clive > > >
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