Getting back to the Money example,

Let say you have a multi-currency app (my case), so you have to deal with a wide range of exchange ratios ( i.e ARS exchange ratio is 0.252 ), now lets assume your money engine is written using cents and the price for one item is 1.10 ARS ( 110 ARS cents ) and you convert it to USD ( 25.452 USD cents ), if we just ignore the floating part of the amount your number becomes 0.25 USD ( 25 USD cents), when you convert it back to the orginal currency you get 0.99 ARS ( ~10% error )

This situation is even worse than dealing floating point's error. And the more you need to do with the data the messier it becomes

In reply to Re^4: Floating point problems by bluescreen
in thread Floating point problems by bluescreen

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