29 lines
686 B
Haskell
29 lines
686 B
Haskell
module Main where
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import System.Random
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import Data.Time
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data Fastfood = Kapsalon
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| Pizza
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| Lasagne
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| Nachos
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| Friet
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| Durum
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deriving (Show, Eq, Ord, Enum, Read, Bounded)
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instance Random Fastfood where
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randomR (a, b) g =
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case randomR (fromEnum a, fromEnum b) g of
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(x, g') -> (toEnum x, g')
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random = randomR (minBound, maxBound)
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getCurrentWeekDay :: IO DayOfWeek
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getCurrentWeekDay = dayOfWeek . utctDay <$> getCurrentTime
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main :: IO ()
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main = do
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day <- getCurrentWeekDay
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case day of
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Tuesday -> print Friet
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_ -> print =<< (randomIO :: IO Fastfood)
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