Re: nan/inf behaviour in ROOT

Hi Vito,

see http://root.cern.ch/root/html/TSystem#TSystem:SetFPEMask

Cheers, Axel.

Vito Di Benedetto wrote on 03/11/2010 09:51 AM:
> Dear ROOT experts,
>
> I'm using ROOT 5.26.00. In this ROOT version I have an unexpected
> behaviour in handling float numbers.
>
> If I type the following instruction
>
> root [0] Float_t a = 0.
> root [1] Float_t b = 10.
> root [2] b/a
> (double)inf
> root [3] Float_t c = -10.
> root [4] TMath::Sqrt(c)
> (const double)nan
>
>
> I don't get exception. I have just inf or nan.
>
> The same happen on my framework based on ROOT. I prefer to get floating
> point exception instead of inf/nan. In this way I can check better in my
> framework if there some "strange Physics effect".
>
> Please, there is some way to get back floating point exception?
>
> Cheers,
> Vito
>
>
>
Received on Thu Mar 11 2010 - 10:05:20 CET