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Annotation of 43BSD/contrib/icon/samples/roman.icn, revision 1.1

1.1     ! root        1: #
        !             2: #          R O M A N   N U M E R A L S
        !             3: #
        !             4: 
        !             5: #  This program takes Arabic numerals from standard input and writes
        !             6: #  the corresponding Roman numerals to standard outout.
        !             7: 
        !             8: procedure main()
        !             9:    local n
        !            10:    while n := read() do
        !            11:       write(roman(n) | "cannot convert")
        !            12: end
        !            13: 
        !            14: procedure roman(n)
        !            15:    local arabic, result
        !            16:    static equiv
        !            17:    initial equiv := ["","I","II","III","IV","V","VI","VII","VIII","IX"]
        !            18:    integer(n) > 0 | fail
        !            19:    result := ""
        !            20:    every arabic := !n do
        !            21:       result := map(result,"IVXLCDM","XLCDM**") || equiv[arabic+1]
        !            22:    if find("*",result) then fail else return result
        !            23: end

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