39 lines
586 B
Rexx
39 lines
586 B
Rexx
s='WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW'
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Say ' s='s
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enc=encode(s)
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Say 'enc='enc
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dec=decode(enc)
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Say 'dec='dec
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if dec==s Then Say 'OK'
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Exit
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encode: Procedure
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Parse Arg s
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c=left(s,1)
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cnt=1
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ol=''
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Do i=2 To length(s)
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If substr(s,i,1)=c Then
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cnt=cnt+1
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Else Do
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Call o cnt||c
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c=substr(s,i,1)
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cnt=1
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End
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End
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Call o cnt||c
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Return ol
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decode: Procedure
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Parse Arg s
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abc='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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ol=''
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Do While s<>''
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p=verify(s,abc,'M')
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Parse Var s cnt =(p) c +1 s
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Call o copies(c,cnt)
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End
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Return ol
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o: ol=ol||arg(1)
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Return
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