Thanks very much Aditya. The language I use most is Eiffel which is case insensitive so I'm not accustomed to seeing such errors. Regards Chris Saunders -------------------------------------------------- From: "aditya siram" Sent: Friday, June 25, 2010 12:52 AM To: "Chris Saunders" Cc: Subject: Re: [Haskell-beginners] Compiling

Try putStrLn. -deech

On Fri, Jun 25, 2010 at 12:50 AM, Chris Saunders wrote:

...

I have just started trying to learn Haskell again (I seem to have a mental block against this language). Right now I'm using Haskell in 5 steps. I have created the file hello.hs exactly as in the section "Write your first Haskell program". I then opened a cmd (I'm using Windows) window in the directory where I created hello.hs and entered "ghc -o hello hello.hs". What follows is the output of the cmd window:

hello.hs:1:7: Not in scope: data constructor `PutStrLn'

Can someone tell me why I am having this problem?

Regards Chris Saunders _______________________________________________ Beginners mailing list Beginners@haskell.org http://www.haskell.org/mailman/listinfo/beginners

First, thanks for the reply Daniel. I just wanted to add that I needed to use the command line "ghc --make hello.hs. I first tried "ghc --make hello hello.hs" and this didn't work. The second is closer to the command line that I used when I had the case error in the source code. Regards Chris Saunders -------------------------------------------------- From: "Daniel Fischer" Sent: Friday, June 25, 2010 1:04 AM To: Subject: Re: [Haskell-beginners] Compiling

On Friday 25 June 2010 06:50:06, Chris Saunders wrote:

...

I have just started trying to learn Haskell again (I seem to have a mental block against this language). Right now I'm using Haskell in 5 steps. I have created the file hello.hs exactly as in the section "Write your first Haskell program". I then opened a cmd (I'm using Windows) window in the directory where I created hello.hs and entered "ghc -o hello hello.hs".

The matter with upper/lower case has already been treated, so I'll focus on the command line.

Unless you know exactly that you can't use the --make option and why, always compile with

ghc --make [other options if wanted] file[s]

without --make, you'll get some puzzling 'undefined symbol' messages from the linker sooner rather than later.

...

What follows is the output of the cmd window:

hello.hs:1:7: Not in scope: data constructor `PutStrLn'

Can someone tell me why I am having this problem?

Regards Chris Saunders

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