[Qt-interest] Why 1/255 is 0 ?

[Alexandre Beraud]

  Hi,

The container (c) may be double, but my guess is that 1 is considered as 
an integer by the compiler, thus 1/255 is 0, converted to double which 
is still 0.
Once again, this is NOT a Qt related question.

Regards,

Alex


Le 13/10/2010 16:11, Hannu Shemeikka a écrit :
> Hi,
>
> Could someone explain me this:
>
> double c = 1/255;
>
> and c is 0 after watching it in debugger. It should be 0,003921569.
> I tried float and few others but no success.
>
> The real thing where I need that division is qPow((i/255),(j/1)); //
> i<255 and j<8
>
> What am I missing here? I'm using Ubuntu 10.10 and Qt 4.7
>
> - Hannu
>
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