Have a look at the wikibook: http://en.wikibooks.org/wiki/Haskell/Simple_input_and_output
Am 07.05.2009 um 11:46 schrieb applebiz89:
I havent done much IO at all in haskell, only within the function itself. However I want to get the input from the interface for the function andhavent done this before. In my main function, I want to ask the user what they would like to do'become fan' for example, then with their choice initiate the function and ask for the appropriate input for that function. This is the code below:main :: IO() do putStr "Hi there! what is your name: " fanName = getLinedo putStr "1 = Insert film, 2 = Become a Fan, 3 = The number of fans of afilm, 4 = Film released in a year: " input = getLine read input :: Int(if input == 1 then main x = insertFilm [] else if input == 2 then main x =becomeFan [] else if input == 3 then main x = numberOfFans []) Say they choose film in a given year function function: filmsInGivenYear :: Int -> [Film] -> [String]filmsInGivenYear filmYear films = [ title | (Film title director year fans)<- films, year == filmYear]I need to ask the user what filmYear they want to insert. But i need to do this from the main function...I chose to do an if statement to choose whatfunction they want, but i dont know where to go from there? any help will be greatly appreciated. thanks apple --View this message in context: http://www.nabble.com/IO-help- tp23423403p23423403.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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