R5RS Scheme输入输出：如何将文本写入/附加到输出文件？

Question

什么是在R5RS兼容版Scheme中输出文本到文件的简单方法？ 我使用麻省理工学院的MEEP（使用Scheme进行脚本编写），我想输出文本到文件。我发现下面的其他答案＃2：

File I/O operations - Scheme

How to append to a file using Scheme

Append string to existing textfile [sic] in IronScheme

但是，他们不正是我一直在寻找。

Answer 1

查理·马丁，本Rudgers，和维杰马修的答案是非常有益的，但我想给一个答案是简单和容易理解的有计划的新的，像我这样的:)

; 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，对于对整个任何挥之不去的问题为 “\ r \ n” 的东西，请参阅下面的答案：

What is the difference between \r and \n?

干杯！