Re: complex variable

[Jan-Benedict Glaw <jbglaw@lug-owl.de>]

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On Mon, 2004-09-13 21:32:06 +0200, Charlie Gordon <gmane@chqrlie.org>
wrote in message <ci4sid$kgu$1@sea.gmane.org>:
> "Jan-Benedict Glaw" <jbglaw@lug-owl.de> wrote in message
> news:20040910200519.GJ19967@lug-owl.de...
[...]
> > So you basically use creal() and cimag() to access the two numbers.
> 
> Well it is still too vague :
> - what is the floating type of complex variable co ?

Not specified, I guess GCC "assumes" something there. But that doesn't
seem (from my reading) to match with C99 rules.

> - You did not specify float, double or long double, so what is the default ?

Hmmm. You're probably right. I've digget into C99, but to be honest, my
reading is that a simple "complex" (without a real floating type) is
just illegal...

> - Reading tens of pages from C99 leaves that question open (!)

Right. At least from my point of view :-)

> - The creal and cimag macros apply to all 3 complex types.

Well, there has been some type-conversion in between :-)
-----------
7.3.9.2 The cimag functions
Sysnopsis
	#include <complex.h>
	double cimag(double complex z);
	float cimagf(float complex z);
	long double cimagl(long double complex z);
-----------

> PS: I have always hated floating point stuff ;-)

/me too, but sometimes, it helps to achieve more correct numbers :-)

MfG, JBG

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