I think you want this:
#lang racket
(define *lex*
'((cat gato katze)
(dog perro hund)
(eats come frisst)
(jumps salte springt)
(the el die)))
;; I also took the liberty of cleaning up your original code,
;; using full Racket because it is what your teacher/you chose
(define (translator wort lexikon sprache)
(cond ((null? lexikon) '(Wort wurde nicht gefunden))
((member wort (first lexikon))
((sprache->selector sprache) (first lexikon)))
(else (translator wort (rest lexikon) sprache))))
(define (sprache->selector sprache)
(cond
((equal? sprache 'english) first )
((equal? sprache 'spanisch) second)
((equal? sprache 'deutsch) third)))
;; the code you want:
(define (translator* worte lexikon sprache)
(map (lambda (ein-wort) (translator ein-wort lexikon sprache)) worte))
;; the example:
(translator* '(the dog jumps) *lex* 'deutsch)
The question you should ask now is how to get from here to there
systematically. It is never about coding, but always about finding the code
systematiclly.
See http://www.ccs.neu.edu/home/matthias/HtDP2e/index.html
> On Jun 25, 2017, at 8:24 AM, philipp.thiess1...@gmail.com wrote:
>
> Hello today I made a translator for drRakket cause its a task of my teacher.
>
>
>
> I did it for one word but now I have to make it with a whole setence. I know
> I have to work with cons somehow but I just dont get how to make it. My
> teacher doesnt understand it himself (he uses a pdf which gives all the tasks
> and wont give us solutuions) so you guys are my only hope.
>
>
> Here is my current code (Sorry for the german ( wort means word, lexikon is
> the list with all the words in 3 langauges) and sprache means language)
>
>
>
> #lang racket
>
> (define *lex*
> '((cat gato katze)
> (dog perro hund)
> (eats come frisst)
> (jumps salte springt)
> (the el die)))
>
>
> (define (translator wort lexikon sprache)
>
> (cond ((null? lexikon) '(Wort wurde nicht gefunden))
>
> ((or (equal? wort (first (first lexikon)))
>
> (equal? wort (first (rest (first lexikon))))
>
> (equal? wort (first (rest (rest (first lexikon))))))
>
>
> (cond
> ((equal? sprache 'english) (first (first lexikon)))
>
> ((equal? sprache 'spanisch) (first (rest (first lexikon))))
>
> ((equal? sprache 'deutsch) (first (rest (rest (first lexikon))))))
>
> )
>
>
>
>
> (else (translator wort (rest lexikon) sprache))
>
> ))
>
>
> So (translator 'cat *lex* 'deutsch) will give the german word for cat which
> is Katze.
>
>
> But now I have to change the code that (translator '(the dog jumps) *lex*
> 'deutsch) will give me "die hund springt".
>
> Can anyone help me? You are my last hope!
>
>
>
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