Eric Kang wrote:
In python, I set:
x=1
y=3
z = x
x = y
y = z
This gave me 3 1, which are the values of x and y swapped.
The following would have given me the same result:
x, y = y, x
But could the swapping be done using less extra memory than this?
What is the minimum amount of extra memory required to exchange two
32-bit quantities? What would be the pseudocode that achieves this
minimum?
x ^= y
y ^= x
x ^= y
This is really only of use when working in assembly language.
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