On Sun, Apr 21, 2013 at 11:05 PM, Vincent Povirk <madewokh...@gmail.com> wrote: > The man page for modf claims it produces an exact fractional part: > http://manpages.ubuntu.com/manpages/quantal/en/man3/modf.3.html > > It's possible for modf to do this because the fractional part of a > floating point number cannot require more precision than the original > value. > > So I think you've essentially just rewritten modf. My understanding is > that floating point equality comparisons are exact, except in weird > cases like NaN.
Oh, thanks for your tips, I will look at it. -- Regards, Zhan Jianyu
