[plt-scheme] DrScheme Tracing problem

When you first started DrScheme, what language did you pick?

It should be "beginning student". If it isn't, you can change it under
the "Language | Choose Language" menu item. Look under the Teaching
Languages tab in the dialog that comes up.

If you are already in the teaching languages, can you send the entire
program that you ran (the entire contents of the definitions window)?

Robby

On 3/17/07, Pat <patrick.amkayah at gmail.com> wrote:
>
>
> ---------- Forwarded message ----------
> From: Pat <patrick.amkayah at gmail.com>
> Date: Mar 17, 2007 11:01 AM
> Subject:
> To: plt-scheme at list.cs.brown.edu
>
>
>
>
> Hi guys, I am a freshman student in Kenya. After I stumbled on MIT's ocw
> website, I got interested in Scheme and after a few while on this LtU site,
> I felt like starting with DrScheme is the best way since its tailoured to
> the biginners. I am very new in Programming and we just don't have great
> teachers who have command of the subject here in Kenya.
> Well after installing and running DrScheme, I encountered a problem which I
> will be very greatful to anyone of you who can help.
> I difined this procedure: (define (area-of-disk r)
> (* 3.14 (* r r)))
> which worked when I ran it like this (area-of-disk 5)
>
> then I defined this: (define (area-of-ring outer inner)
> (- (area-of-disk outer)
> (area-of-disk inner)))
> However upon running this procedure I got this message; area-of-disk: name
> is not defined, not an argument, and not a primitive name.
> and this on the tracing window: No tracing results are available, yet. (Make
> sure that your language supports tracing and that tracing is enabled.)
> Can anyone help?
>
> --
> Live, Learn, Love!
> Patrick Amkayah.
>
> --
> Live, Learn, Love!
> Patrick Amkayah.
> _________________________________________________
>   For list-related administrative tasks:
>   http://list.cs.brown.edu/mailman/listinfo/plt-scheme
>
>