RE: [Dev-C++] Simple Question

[Ioannis V. <no...@ho...>]

The resulting source code after the preprocessing is where in the source
code was written PI to have been replaced with 3.1415 and where TWOPI is
written to have been replaced with (2.0 * 3.1415).
 
Then the whole code gets compiled.
 
 
 
Ioannis

* Ioannis Vranos
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-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Scott
Williams
Sent: Saturday, August 31, 2002 6:05 PM
To: dev...@li...
Subject: [Dev-C++] Simple Question


Hi,
 
This is more of a general C question but just in case it's compiler
dependent. . .
 
I'm curious how the following is handled:
 
#define PI 3.1415
#define TWOPI (2.0 * PI)
 
Does this add a flop everywhere TWOPI is used or is the expression
evaluated to 6.2830 and then inserted?  If the latter, with what
precision is the evaluation done (e.g., what does TWOPI look like if I
#define PI to 20 digits?).
 
Thanks.
 
Scott