Cybertronic wrote:

Hi all, I'm pretty much new to Haskell however I'm stuck on something which is that I'm trying to create a function called display where I type in a DVD name, e.g. dvd1, it returns d (String) and the multiplication of q (Int) and i (Double)

Here's what I've done so far:

type Film = (Int,String,Int,Double)

dvd1 :: Film dvd1 = (1, "Space", 5, 9.99)

display :: Product -> String display (c,d,q,i) = d

My display function only shows the string but unfortunately I'm stuck on how to get the display function to multiply q (Int) and i (Double) together and display it next to d.

Can someone help me out please? :)

I'd recommend a tutorial like http://www.cs.utah.edu/~hal/docs/daume02yaht.pdf

display :: Film -> String display (c,d,q,i) = d ++ " " ++ show (fromIntegral q * i)

q needs to be converted first and show will convert the result to a string. -- View this message in context: http://www.nabble.com/Haskell-beginner-questions-tf2500050.html#a6971248 Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.