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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Roman-numerals-Encode/Miranda/roman-numerals-encode.miranda Normal file
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main :: [sys_message]
main = [ Stdout (show n ++ ": " ++ toroman n ++ "\n")
| n <- [1990, 2008, 1666, 2023]]
toroman :: num->[char]
toroman 0 = ""
toroman n = d ++ toroman (n - v)
where digits = [("M",1000),("CM",900),("D",500),("CD",400),
("C",100),("XC",90),("L",50),("XL",40),
("X",10),("IX",9),("V",5),("IV",4),
("I",1)]
(d, v) = hd [(d,v) | (d,v) <- digits; v <= n]