-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The error you are getting is about your use of the check-expect function.
- From the docs, the function signature: (check-expect expression expected-expression) So you have to provide what you expect the call to manhatten to return, along with your call to it. On 03/29/2012 11:20 AM, Roelof Wobben wrote: > Hello, > > Im trying to make a programm which use structures and calculates > the distance between a point and another point. The first point has > coordinates (0,0). > > So I made this : > > ;; Posn -> Number. ;; A programm for calculating the distance is > Manhatten (check-expect ( manhatten (make-posn 7 3 ) 10)) > (check-expect ( manhatten (make-posn 1 1 ) 2)) > > (define (manhatten pos-manhatten) ( + (pos-y posmanhetten) (pos-x > manhetten))) > > I get this message : > > check-expect: expects 2 arguments, but found only 1 > > But there is only 1 argument the structure pos-manhatten. > > Roelof ____________________ Racket Users list: > http://lists.racket-lang.org/users - -- Eduardo Bellani fear is an alarm, not a compass. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAk90cgYACgkQSbLl0kCTjGkS3QCeIquvJ8x1tI1T0/PzZ4wWFptP dY4An2XZHfHWa/HXoEXxFXC8ibABOBG+ =STb7 -----END PGP SIGNATURE----- ____________________ Racket Users list: http://lists.racket-lang.org/users
