> On Sep 7, 2017, at 9:28 AM, jaroslaw.mo...@gmail.com wrote:
> 
> 
> Dear Racketeers!
> 
> I would like to write the function divide in racket, for performing the long 
> division, which would print the whole computational process, as the 
> elementary school pupils do. For example, the call (divide 5432, 12) should 
> print this:
> 
> 5432 : 12 = 452
> -48
> --
>  63
> -60
>  --
>   32
>  -24
>   --
>    8
>    =

Sounds like fun! 

If I were you, I would separate this into two problems.

1) given the divisor and the divisee, produce a “trace” of the division.
2) given a “trace”, produce a (single multi-line) string representing it.

Most of the thinking will be in developing the data definition for the “trace. 
” Once this is done, the rest should be pretty straightforward.

John Clements

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