What would you expect the program to output? You probably mean
'testDatabase' instead of 'films'.
/jve
On Tue, May 12, 2009 at 12:59 PM, applebiz89
I have compiled each function independently and they have compiled the only problem is the main function..
I keep getting the error 'films not defined' and I am not sure why
[code]
type Title = String type Director = String type Year = Int type Fan = String
data Film = Film Title Director Year [Fan] deriving Show
-- List of films
testDatabase :: [Film] testDatabase = [ (Film "Casino Royale" "Martin Campbell" 2006 ["Garry", "Dave", "Zoe"])]
-- Function
filmsInGivenYear :: Year -> [Film] -> [String] filmsInGivenYear year' films = [ title | (Film title director year fans) <- films, year == year']
doFilmsInGivenYear :: [Film] -> IO () doFilmsInGivenYear films = do putStrLn "which year?" text <- getLine let year' = read text :: Int let answer = filmsInGivenYear year' films print answer
main :: IO () main = do doFilmsInGivenYear films main
[/code]
if the other functions are compiling without this error im not sure as to why the main function does not compile because of the films...any light on this?
Thanks -- View this message in context: http://www.nabble.com/Main-function-error-tp23506481p23506481.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.
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