在 R5RS 兼容版本的 Scheme 中输出文本到文件的简单方法是什么？ 我使用麻省理工学院的 MEEP（它使用 Scheme 进行脚本编写）并且我想将文本输出到文件。我在 Stackoverflow 上找到了以下其他答案：
How to append to a file using Scheme
Append string to existing textfile [sic] in IronScheme
但是，它们并不是我想要的。
【问题讨论】：
标签： io scheme read-write r5rs meep
Charlie Martin、Ben Rudgers 和 Vijay Mathew 的回答非常有帮助，但我想给出一个简单易懂的答案，让像我这样的新计划者容易理解 :)
; This call opens a file in the append mode (it will create a file if it doesn't exist)
(define my-file (open-file "my-file-name.txt" "a"))
; You save text to a variable
(define my-text-var1 "This is some text I want in a file")
(define my-text-var2 "This is some more text I want in a file")
; You can output these variables or just text to the file above specified
; You use string-append to tie that text and a new line character together.
(display (string-append my-text-var1 "\r\n" my-file))
(display (string-append my-text-var2 "\r\n" my-file))
(display (string-append "This is some other text I want in the file" "\r\n" my-file))
; Be sure to close the file, or your file will not be updated.
(close-output-port my-file)
而且，对于整个 "\r\n" 事情的任何挥之不去的问题，请参阅以下答案：
What is the difference between \r and \n?
干杯！
【讨论】：