On Thu, Nov 08, 2012 at 01:30:44AM -0000, z_axis wrote: > Welcome to Racket v5.3. > -> (+ 1/2 1/3) > 5/6 >
If you look carefully at your below message, you have unbalanced parenthesis, which I was joking about when I spoke of a syntax error. The error did not affect the clarity of what you were asking. Consider my comment a too-subtle "like a joke only not as funny." missive. > BTW, what do the following message mean ? > (use numbers) > ; loading /usr/local/lib/chicken/6/numbers.import.so ... > > Note: re-importing already imported identifier: + > > Note: re-importing already imported identifier: - > > Note: re-importing already imported identifier: * > > Note: re-importing already imported identifier: / > ...... > Chicken Scheme has a small "base system" that contains a minimal feature set. Certain eggs (specifically numbers and utf8) will amend this basic feature set with more powerful versions of existing routine. These messages are describing that phenomenon: the routine '+' exists in the core Chicken Scheme system, but does not, as you have observed, implement the full numeric tower. The numbers egg replaces the core '+' routine with it's own, as it does everything the core '+' does and substantially more. -Alan > Best Regards! > > > 在 Thu, 08 Nov 2012 00:17:23 -0000，.alyn.post. > <[email protected]> 写道: > > >On Wed, Nov 07, 2012 at 11:57:33PM -0000, z_axis wrote: > >> > >>>(+ (+ 1/2 1/3) > >> > >>Warning: cannot represent exact fraction - coerced to flonum: "1/2" > >>Warning: cannot represent exact fraction - coerced to flonum: "1/3" > >>0.8333333333333331/2 1/3) > >> > >> > >>In racket, it is 5/6. And as i know it is 5/6 for any lisp > >>implementation. > >> > >> > >>Sincerely! > >> > > > >I suspect in Racket your above code is a syntax error. ;-) > > > >More seriously, try this: > > > > (use numbers) > > (+ (+ 1/2 1/3)) > > > >That gives you the answer you expect. > > > >-Alan > -- .i ma'a lo bradi cu penmi gi'e du _______________________________________________ Chicken-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/chicken-users
