>               IS THE I/O SYSTEM IN HASKELL ADEQUATE?   
I think the answer is: NO!
What you want to do cannot be done in Haskell.  Some people may
argue that it should be done in another way, but I think your
Miranda solution is perfectly good.
If you are more interested in getting a running program than writing
in standard Haskell you might want to consider using hbc.  It contains
a module IO which (among other things) has the function
        openFile :: String -> Either String String
which given a file name returns the contents of the file or an error message.
This module is not written in Haskell (since it's impossible to do that).

        -- Lennart

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