scheme - 从 Gambit Scheme Interpreter 到文件的管道测试/跟踪

Question

如果我处理，例如：

(define square
  (lambda (n)
    (* n n)))

例如，我使用 (square 5) 对其进行测试，如何将此结果从 Gambit Scheme 解释器传输到文本文件？

Answer 1

One solution:

(define square
  (lambda (n)
     (* n n)))

(call-with-output-file "a-file.txt"
  (lambda ()
     (display (square 5))
     (newline)))

Another is to print directly to standard output:

(define square
  (lambda (n)
     (* n n)))

(display (square 5))
(newline)

And then use > in the shell to direct the output to a specific file.