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Miguel Barao <mjsb@...> (Thu, 27 Oct 2005 15:24:54 +0100):
> The answer is in 'man signbit'.
>
> signbit is probably just ANDing your float value with 2^31=0x80000000 which
> reads -2147483648 if considered as a signed int (like in your printf).
Yes. The manpage doesn't say it returns 1, but it returns non-zero.
-2147483648 is non-zero. You need to check if the value is !0, not if
the value is 1. By the way, this holds for many boolean functions.
Regards.
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