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 <[email protected]> wrote: > > 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. > > _______________________________________________ > Haskell-Cafe mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell-cafe >
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