Re: [racket] how to design programs chap5 error!!!
> On Nov 28, 2010, at 6:58 AM, 邢泉 wrote: > >> Hi: >> Help Me! Thanks! >> > (master check-color) >> check-color: this is a procedure, so it must be applied to arguments >> (which requires using a parenthesis before the name) On 11/29/10 10:10 PM, Matthias Felleisen wrote: How did you produce this error message? My guess: Q. Xing defined master rather than using the master teachpack, which results in this error. Make sure you add the master.ss teachpack by going to Language > Add Teachpack... then select master.ss. Remove any definition of master that you have written. David _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
Re: [racket] how to design programs chap5 error!!!
How did you produce this error message? When I run this program: (require htdp/master) (define (check-color x y z w) x) (master check-color) I get no error whatsoever. I also don't get an error when I run > (master check-color) in the interactions area: Welcome to DrRacket, version 5.0.99.3--2010-11-29(f11e53c/g) [3m]. Language: Beginning Student. > (master check-color) true > -- Matthias On Nov 28, 2010, at 6:58 AM, 邢泉 wrote: > > Hi: > > Help Me! Thanks! > > > (master check-color) > check-color: this is a procedure, so it must be applied to arguments (which > requires using a parenthesis before the name) > > > 2010-11-28 > Q.Xing > _ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
