[Tutor] Help with the code for an exercise in, "Instant Hacking"

[Dempsey]

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The following exercise is found in the, "Instant
Hacking".

I'm having trouble visualizing this exercise shown
below.  Could someone show me what the code would
look like?

Thanks,

Bob
infody@earthlink.net
--------------------------------------------------
---------------

Exercise 2
Write a function that implements Euklid's method
for finding a common factor of two numbers. It
works like this:
You have two numbers, a and b, where a is larger
than b
You repeat the following until b becomes zero:
a is changed to the value of b
b is changed to the remainder when a (before the
change) is divided by b (before the change)
You then return the last value of a
Hints:
*	Use a and b as parameters to the function
*	Simply assume that a is greater than b
*	The remainder when x is divided by z is
calculated by the expression x % z
*	Two variables can be assigned to simultaneously
like this: x, y = y, y+1. Here x is given the
value of y (that is, the value y had before the
assignment) and y is incremented by one



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