> From: Chris Radek <ch...@timeguy.com>
> 
>> www.mpm1.com:8080/machines/robots/americanrobots1/genserkins_stuart.c
> 
> I'm not sure what the construct a -= b -= c does.  What do you intend?

    I can't say anything about intent, but the code does the following:

    First calculate
    b = b - c
    then calculate
    a = a - b

    Or if you prefer to evaluate them in the other order:

    First calculate
    a = a - (b - c)
    then calculate
    b = b - c



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