On Jul 2, 2012, at 12:39 PM, Roelof Wobben wrote: > (define-struct VZoo (Vcat Vcham)) > ; Zoo - (make-Vzoo struct struct) > ; interp. (make-Vzoo Vcat Vcham) where Vcat and Vcham are both structs > containing the parameters of that particular struct.
So far so good. > ; make-Vzoo Vcat Vcham -> Vzoo You never took my advice to write it like this make-Vzoo ; Vcat Vcham -> Vzoo > And if I want to know the happiness of a Vcat must I use (Vcham-H Vcham) or > do i have to use Vzoo( Vcat (Vcham-H Vcham) > As I understand it right Vcat is now a part of Vzoo. Time to 'play' aka experiment. A data definition is a recipe for producing examples of data. It says so in the book. Make 2 examples of Vchams, Vcats, and Vzoos each. I start: (define vcham1 (make-Vcahm 1 2 3)) You may use previously defined data -- Matthias ____________________ Racket Users list: http://lists.racket-lang.org/users
