Haskellers:

I want to write a function that takes a class name and reads from a file and then returns the

list of String of the file lines. I have experimented with various return types, but GHC does not like any of them. Here is my function:

readData :: String -> IO String   -- what type here??
readData classNameP = do
    let fileName = classNameP ++ ".txt"
    contents <- readFile fileName
    lines contents

Not to complain, but this would not be difficult in any other language I have tried, so I could use

some explanation. I suspect it has to do with understanding the IO Monad.

Many Thanks

Geoffrey