How to resolve the algorithm 99 bottles of beer step by step in the Racket programming language

Published on 12 May 2024 09:40 PM
#Racket

How to resolve the algorithm 99 bottles of beer step by step in the Racket programming language

Table of Contents

Problem Statement

Display the complete lyrics for the song:     99 Bottles of Beer on the Wall.

The lyrics follow this form: ... and so on, until reaching   0     (zero). Grammatical support for   1 bottle of beer   is optional. As with any puzzle, try to do it in as creative/concise/comical a way as possible (simple, obvious solutions allowed, too).

Let's start with the solution:

Step by Step solution about How to resolve the algorithm 99 bottles of beer step by step in the Racket programming language

Source code in the racket programming language

#lang racket
(define (sing bottles)
  (define (plural n) (~a n " bottle" (if (= n 1) "" "s")))
  (printf "~a of beer on the wall\n~a of beer\n~
           Take one down, pass it around\n~a of beer on the wall\n\n"
          (plural bottles) (plural bottles) (plural (sub1 bottles)))
  (unless (= 1 bottles) (sing (sub1 bottles))))
(sing 99)

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