R5RS Scheme輸入輸出：如何將文本寫入/附加到輸出文件？

Question

什麼是在R5RS兼容版Scheme中輸出文本到文件的簡單方法？ 我使用麻省理工學院的MEEP（使用Scheme進行腳本編寫），我想輸出文本到文件。我發現下面的其他答案＃2：

File I/O operations - Scheme

How to append to a file using Scheme

Append string to existing textfile [sic] in IronScheme

但是，他們不正是我一直在尋找。

Answer 1

查理·馬丁，本Rudgers，和維傑馬修的答案是非常有益的，但我想給一個答案是簡單和容易理解的有計劃的新的，像我這樣的:)

; 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，對於對整個任何揮之不去的問題爲 「\ r \ n」 的東西，請參閱下面的答案：

What is the difference between \r and \n?

乾杯！