Evalutation of a string

From: Filippo De Grandi <pippuz_at_tin.it>
Date: Mon, 31 Aug 1998 18:28:19 +0200

I have a problem with scheme:

I'm building an evalutator for scheme expressions that works on the web.
It takes a sheme expression from a socket [for example: (define t 6) (+ t
t)] and stores it in a string called dati.
I need to evalutate such string and store the output of the evalutation in
another string [result].
with something like this:

;##########################################
(define (valutazione dati)

    (define portainput (open-input-string dati))
    (define portaoutput (open-output-string))
    (define (nsp_eval expr)
      (define result "")
      (set! result (eval expr))
      (display result))

    (display "OK, valutation function; Recived data: ")
    (display dati)
    (newline)

    (display "Evalutated data: ")
    (nsp_eval dati))

;##########################################


But it doesn't works...
Someone can help me please ???


Filippo De Grandi
Received on Mon Aug 31 1998 - 18:24:14 CEST