I've had an idea for a class that, instead of storing a number as a single floating-point value, stores the exact value as two or more integers (in cases such as division, fractional exponents, or irrational numbers such as pi or e). The class would have it's own mathematical functions as methods, modifying the internal values and possibly storing additional values as needed, and returning a double. The point would be to always have the exact value, only rounding when returning a value. This sounds like a good idea to me, but i haven't seen it done before. Does it exist and i simply haven't seen it, or is there some inherent flaw with this idea?
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