CODEWITHSUNDEEP
haskelltuples
naturesenshi
naturesenshi

Reputation: 340

Error in Haskell code containing tuples

I have been trying to create a function in Haskell that will take a non-negative value which corresponds to minutes and return it in the format (days,hours,minutes) e.g. 4000 minutes will give (2, 18, 39).

My code keeps returning the error "file:.\prac0.hs:27 - Syntax error in input (unexpected `|')" on load.

Here is my code: 

dayshoursmins :: Int->(Int,Int,Int)
dayshoursmins n = (x,y,z)
    | n==0 = 0  
    | n`div`1440 =>1 = x && dayshoursmins(n`mod`1440)
    | n`div`60 < 24 = y && dayshoursmins(n`mod`60)
    | n < 60 = z

Upvotes: 0

Views: 60

Answers (1)

willeM_ Van Onsem
willeM_ Van Onsem

Reputation: 476967

The pipe (|) is used as a guard, what you need is a where clause I think:

dayshoursmins :: Int->(Int,Int,Int)
dayshoursmins n = (d,h,m)
    where d = div n 1440
          dm = mod n 1440
          h = div dm 60
          m = mod dm 60

Running this with ghci gives:

*Main> dayshoursmins 2016
(1,9,36)

I don't really understand your code: it does seem to mix all kinds of concepts. After the = operator, you cannot put guards anymore.

Upvotes: 4

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