How to resolve the algorithm File input/output step by step in the Scheme programming language

Published on 12 May 2024 09:40 PM
#Scheme

How to resolve the algorithm File input/output step by step in the Scheme programming language

Table of Contents

Problem Statement

Create a file called   "output.txt",   and place in it the contents of the file   "input.txt",   via an intermediate variable. In other words, your program will demonstrate:

Oneliners that skip the intermediate variable are of secondary interest — operating systems have copy commands for that.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm File input/output step by step in the Scheme programming language

Source code in the scheme programming language

; Open ports for the input and output files
(define in-file (open-input-file "input.txt"))
(define out-file (open-output-file "output.txt"))

; Read and write characters from the input file
; to the output file one by one until end of file
(do ((c (read-char in-file) (read-char in-file)))
        ((eof-object? c))
        (write-char c out-file))

; Close the ports
(close-input-port in-file)
(close-output-port out-file)

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