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Largest Value of Three
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A student showed me an alternate way of calculating the largest number
of three values, based on the bubble sort:

Algorithm:

    Input three numbers into three memory locations
    Compare the first two numbers:
       if second is larger than first, copy second to first
    Compare first and third:
       if third is larger than first, copy third to first
    output first

The advantage of this algorithm is that it is simpler than a set of
nested IF statements (about half the code).  The disadvantage is that
it changes the input arguments, so that any further processing on them
would not be possible.