export - How to provide a function in a Racket environment on the Raspberry Pi? -

i want execute program (written in racket) on raspberry pi when doing so, doesn't know functions defined in file.

the small example below gives rise following error on raspberry pi : default-load-handler: expected 'module' declaration "test", found: else in: ...

file i'm executing on raspberry pi :

(require "test.rkt") (display "2 + 2 = ") (display (plus 2 2)) 

the "test.rkt" file :

(provide plus) (define (plus b)   (+ b)) 

when executing file doesn't display gives rise error listed above.

note files don't contain : "#lang racket". because if contain it, loading file nothing.

so following file nothing when loaded on raspberry pi :

#lang racket ; when omitting "hello world!" displayed, else not (display "hello world!")