10-14-2012
Quote:
Originally Posted by
Corona688
They must have taken effort to make it do so. I don't know why they bothered, since it's not a feature really needed, undesirable in most cases, and easy to do yourself if you really want it.
Floating point numbers are represented internally as an exponent, like 1.5*10^3 or so forth.
On the machines most of us work on, floating point numbers are represented as x*2^y or x*16^y rather than x*10^y, but .5 is exactly representable in any of them. On the other hand 0.1 is not exactly representable on any system that uses an exponent of 2 or 16.
As pointed out by Scrutinizer, the real answer lies in the rounding mode being used by whatever function is converting the internal floating point value to a printable decimal representation of that value.
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