-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 02/11/13 19:48, Mischa Baars wrote: [...] > I have written a couple of new trigonometric functions for use in > the library, and actually I need this to function properly.
The point is that 1.1 simply cannot be represented precisely as a IEEE floating point number, for precisely the same reasons that 1/3 cannot be represented precisely as a decimal number (1.3333...). This is intrinsic to the way that floating point numbers work. If you try, you'll get the closest number that IEEE floats *can* represent. If you really need a completely precise representation of 1.1, then you're not going to be able to use IEEE floats --- you'll have to use decimals or some sort of fractional representation instead. I don't know if gcc can help you with those, but there are endless helper libraries that will do both for you. They're usually pretty slow, though. - -- ???? ?????????????? ????? http://www.cowlark.com ????? ? "There does not now, nor will there ever, exist a programming ? language in which it is the least bit hard to write bad programs." --- ? Flon's Axiom -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iD8DBQFSdVxhf9E0noFvlzgRAjTFAJ4+UO9b60TkX+/lOa8C/5Hs/XMT3QCcCm8u k2FWyohiL0rQtLUtotFkS/Q= =LgFz -----END PGP SIGNATURE-----
