I want to divide two ull variables and get the most accurate outcome.
what is the best way to do that?
i.e. 5000034 / 5000000 = 1.0000068
I want to divide two ull variables and get the most accurate outcome. what
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I want to divide two ull variables and get the most accurate outcome.
what is the best way to do that?
i.e. 5000034 / 5000000 = 1.0000068
If you want “most accurate precision” – you should avoid floating point arithmetics.
You might want to use some big decimal library [whcih usually implements fixed point arithmetic], and will allow you to define the precision you are seeking.
You should avoid floating point arithmetic because thet are not exact [you have finite number of bits to represent infinite number of numbers in every range, so some slicing must occure…]. Fixed point arithmetic [as usually implemented in big decimal libraries] allows you to allocate more bits “on the fly” to represent the number in the desired accuracy.
More info on the floating point issue can be found in this [a bit advanced] article: What Every Computer Scientist Should Know About Floating-Point Arithmetic