99 Bottles of Beer

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Language Stratego

Date:	01/15/08
Author:	Valentin David
URL:	http://www.ii.uib.no/~valentin
Comments:	0
Info:	http://www.stratego-language.org/
Score:	(2.90 in 10 votes)

module beers
imports libstratego-lib

strategies

   bottles = ?1; !"1 bottle"
          <+ ?0; !"no more bottle"
          <+ <concat-strings> [<int-to-string>, " bottles"]

   cap = string-as-chars([to-upper|id] <+ [])

   beers =
       !99
       ; rec x(
           where(<concat-strings; cap; echo>
                    [<bottles>, " of beer standing on the wall, ",
                     <bottles>, " of beer."])
         ; ?0
        <+ dec
         ; where(<concat-strings; echo>
                    ["Take one down and pass it around, ",
                     <bottles>, " of beer on the wall."])
         ; x)
       ; <echo>
          "Go to the store and buy some more, 99 bottles of beer on the wall."
       ; <exit> 0

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