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Rock-paper-scissors: Difference between revisions
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</pre>
=={{header|Haskell}}==
<lang haskell>import System.Random
data Choice = Rock | Paper | Scissors
deriving (Show, Eq)
res x y | x == y = "draw"
res Paper Rock = "player wins"
res Scissors Paper = "player wins"
res Rock Scissors = "player wins"
res _ _ = "player loses"
genrps (r,p,s) = fmap rps rand
where rps x | x <= s = Rock
| x <= s+r = Paper
| otherwise = Scissors
rand = randomRIO (1,r+p+s) :: IO Int
getrps = fmap rps getLine
where rps "scissors" = Scissors
rps "rock" = Rock
rps "paper" = Paper
rps _ = error "invalid input"
game (r,p,s) = do putStrLn "rock, paper or scissors?"
h <- getrps
c <- genrps (r,p,s)
putStrLn ("Player: " ++ show h ++ " Computer: " ++ show c)
putStrLn (res h c ++ "\n")
let rr = if h == Rock then r + 1 else r
pp = if h == Paper then p + 1 else p
ss = if h == Scissors then s + 1 else s
game (rr,pp,ss)
main = game (1,1,1)</lang>
=={{header|Icon}} and {{header|Unicon}}==
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