-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Digvijoy Chatterjee schrieb:
... here is a simple program, int main() { double d=76.32; std::string s = boost::lexical_caststd::string(d); cout << s << endl; }
output 76.319999999...
a) am i doing something wrong ??
I don't think so.
b) if this is not wrong s this standard behavior ??
I'd say so. Due to the binary representation not all numbers with a representation of a fixed amount of digits in our decimal system have such a representation in the computer. Lexical_cast internally uses standard streams, if they don't correct such things (and I don't know of any implemementation that'd do so), your output will look garbaged. Try adding std::cout << d << std::endl. - -- - -ness- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGD3V8vD/ijq9JWhsRAqaBAJ9bIJh5erQWZcPGz3Xbgl1xsqtVsACfc2R4 eJj/WLx3HHGkOcahvg7reyg= =zDxW -----END PGP SIGNATURE-----