A very quick reply and without reading carefully considering what may be different in GHCI (!), but the output buffer flushes (at least on my system) with newline (if you don;t flush it 'manually'). I suspect if you use putStrLn for 'what's your name' you may get something more like what you want. On 7 Jun 2012, at 12:22, Matthew Moppett wrote:
I have a very simple Haskell file (HelloWorld.hs) that reads like this:
main = do putStr "What's your name? " n <- getLine putStrLn $ "Pleased to meet you, " ++ n
When I load it into ghci, I get the following result, as expected:
[1 of 1] Compiling Main ( HelloWorld.hs, interpreted ) Ok, modules loaded: Main. *Main> main What's your name? Matt Pleased to meet you, Matt *Main>
However, when I compile the same file using ghc and run it in a terminal, I get a very different result:
matt@matt-Lenovo-G575:~/Haskell$ ghc HelloWorld.hs [1 of 1] Compiling Main ( HelloWorld.hs, HelloWorld.o ) Linking HelloWorld ... matt@matt-Lenovo-G575:~/Haskell$ ./HelloWorld Matt What's your name? Pleased to meet you, Matt matt@matt-Lenovo-G575:~/Haskell$
-- in other words, the getLine action is being run before the putStr action, for some strange reason.
Is this a bug? Can anyone enlighten me as to what might be going on?
Regards,
Matt. _______________________________________________ Beginners mailing list Beginners@haskell.org http://www.haskell.org/mailman/listinfo/beginners