Hello Awsaf, you should probably look further into the topic of "IO in Haskell" and "Monads". Then you can use impure functions like readFile (http://hackage.haskell.org/package/base-4.11.1.0/docs/Prelude.html#v:readFil... ) or getArgs (http://hackage.haskell.org/package/base-4.11.1.0/docs/System-Environment.htm...). A naive solution might look like this: module Main where import System.Environment (getArgs) main = do (fileName:_) <- getArgs unsortedList <- read <$> readFile fileName let sorted = yourMergeSortFunction unsortedList print sorted -- maybe you like to print your sorted list Best regards, Tobias ----- Nachricht von Awsaf Rahman <awsafrahman1704@gmail.com> --------- Datum: Thu, 5 Jul 2018 22:21:15 +0200 Von: Awsaf Rahman <awsafrahman1704@gmail.com> Antwort an: The Haskell-Beginners Mailing List - Discussion of primarily beginner-level topics related to Haskell <beginners@haskell.org> Betreff: [Haskell-beginners] Passing a file containing a list as an input An: beginners@haskell.org
Hello everyone! I am really struggling with Haskell I/O. I have written a mergesort program and as an input to that program I want to use a file containing a list of 1000 integers. Let's say the contents of the file look like this [120, 400, 500 , 20, 100 ..] How can I achieve that? I am trying to write a main function that takes the file as an input and passes the list to my mergesort function.. Regards Awsaf Rahman
----- Ende der Nachricht von Awsaf Rahman <awsafrahman1704@gmail.com> -----