Racket, include, require and provide don't work

问题

I have a file with the name “functions.rkt”, where I have some functions.

And I am working in another file, let’s name it “working.rkt”

I have tried the following (one by one) at “working.rkt” to use the function defined at “functions.rkt”:

(require “functions.rkt”)

(include “functions.rkt”)

(provide “functions.rkt”)

And anyone of them hasn’t worked, any help?

They are in the same path.

回答1:

In the file "functions.rkt:

#lang racket
(provide my-function)
(define (my-function x) (* 2 x))

In the file "working.rkt":

#lang racket
(require "functions.rkt")
(my-function 21)

来源：https://stackoverflow.com/questions/43470743/racket-include-require-and-provide-dont-work