[Bug c/47146] Floating point to integer conversions

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47146

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-01-01 18:21:01 UTC ---
(In reply to comment #0)
> Casting and rounding seems to be a problem.

Please be more specific.

Do you understand how floating point works?

Do you know that "0.39 * 100" has type double, not float, so has more precision
(and a different value) than "(float)0.39 * 100" ?

If you use doubles, or consistently use floats (not a mix of floats and
doubles) then you get consistent results