http://ik.homelinux.org/
On Mon, Mar 1, 2010 at 23:20, Jerry <lancebo...@qwest.net> wrote: > Don't compare floating points. Ever. Now you see why. > So if I need for example to compare currency or something that is floating point, how do I do that ? > > Also, don't write loops that calculate a floating point number which is > then tested for equality to exit the loop. Also, it is a bad idea to test > for > or < for exiting unless you know in advance an accidental equality > result will not yield surprising results. In other other words, don't do > that (test for > or <) either. > As I understand, there is an old way to calculate floating point that is very popular and newer ways for that. The old way uses binary calculation and the newer I do not understand them :) > > Jerry > > On Feb 26, 2010, at 3:37 AM, ik wrote: > > Hello, > > I've made a small test: > > if (0.1+0.2) = 0.3 then > > The only compiler/interpator that actually tells that it equal is FPC. > > I've tested it using Javascript (in Firefox), Ruby, Python, C (gcc) and > Perl. > > Except FPC, everyone tells that 0.1+0.2 = 0.30000000000000004 > > Can someone explain how FPC see the result and why others does not see it > like that ? > > > Thanks, > Ido > > http://ik.homelinux.org/ > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/mailman/listinfo/fpc-pascal > > > > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/mailman/listinfo/fpc-pascal > Ido
_______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
