[plt-scheme] which teachpack contains (make-posn)

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"Beginning Student" under the "How to Design Programs" tab in the
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Robby

At Mon, 09 Feb 2004 15:16:37 -0500, Terrence Brannon wrote:
> ------------------------------------------------------------------------------
> I skipped ahead to Chapter 6 in HtDP but that chapter did not specify 
> which teachpack contained (make-posn). Loading the draw teachpack worked 
> for |
> 
> 
> (start 300 300)| ; which opens a canvas;
> 
> |but failed for:
> |
> 
> |(draw-solid-line (make-posn 10 10) (make-posn 110 10) 'red)
> |
> 
> |because make-posn was undefined.
> 
> |
> 
> 
> ------------------------------------------------------------------------------
> I skipped ahead to Chapter 6 in HtDP but that chapter did not specify which teachpack contained 
> (make-posn). Loading the draw teachpack worked for 
> (start 300 300); which opens a canvas; 
> 
> but failed for:
> 
> (draw-solid-line (make-posn 10 10) (make-posn 110 10) 'red)
> 
> because make-posn was undefined.
>