this is top-posted because it doesn't follow from any one of the previous posts.

just a warning to be careful of subtracting or dividing similar numbers in
floating point
and what your expectations are for the results. google for 'catastrophic loss of
precision' 
or similar, or check out the floating point standard (IEEE #754) for why these
fall apart.
*most* tests of equality, or relative size, in *most* architectures, map to
subtractions 
by the time they get the processor. watch out. 

just a tuppence / 2 eurocents worth. 

ed c


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