[gecode-users] nroot for negative integers

[Christian Schulte]

Damn it, the code ignores odd exponents... I'll fix it sometime.

Thanks for letting us know.
Christian

--
Christian Schulte, www.ict.kth.se/~cschulte/


> -----Original Message-----
> From: users-bounces at gecode.org [mailto:users-bounces at gecode.org] On
> Behalf Of Kish Shen
> Sent: Monday, July 22, 2013 11:27 PM
> To: users at gecode.org
> Subject: [gecode-users] nroot for negative integers
> 
> Hi,
> 
> I have just added support for pow and nroot to expressions in the ECLiPSe
> interface to Gecode, and on testing it, I get failures with negative
numbers, for
> example (in ECLiPSe syntax):
> 
> A #= rootn(-8,3)
> 
> fails, while
> 
> A #= rootn(8, 3)
> 
> succeeds, with A = 2.
> 
> Should the first case set A to -2?
> 
> The above expressions are passed to MiniModel and parsed as IntExpr. I
used
> Gecode 4.2.0 for the above tests.
> 
> Cheers,
> 
> Kish
> 
> 
> 
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