Re: can't initialize a constant using another constant?

Kristof Provost <[email protected]>
Newsgroups org.kernel.vger.linux-c-programming
Message-ID <20080227083312.GC13641@nereid>
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On 2008-02-27 08:09:57 (+0000), Kristof Provost <[email protected]> wrote:
> On 2008-02-26 20:02:06 (+0530), Shriramana Sharma <[email protected]> wrote:
> > A strange thing I ran across this evening. I was not allowed to do:
> > 
> > const double lunarSynodicMonth = 29.53059 ;
> > const double daysLunarPhaseAngleTakesPerDegree = lunarSynodicMonth / 360.0 ;
> > 
> > I got the following error:
> > 
> > wdf-karanas.c:17: error: initializer element is not constant
> > make: *** [wdf-karanas.o] Error 1
> > 
> > I would be grateful if anyone could shed some light. TIA.
> What compiler are you using? 
> I did a quick test on g++ 4.1.2 (x86_64) and it seemed to be accepted
> without warning.
I took a better look. I get the same error with gcc.

It looks like this is allowed in C++ and not in plain C (or at least,
g++ allows it and gcc doesn't).

Kristof
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