how to determine how many digits there are in a number after the decimal point?

Quote:

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Originally Posted by Usul

But hey, I solved it and it works.

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Yes it does and the reason is the defined rounding (as I mentioned in #11). By doing this you're working with exact numbers in the decimal number system. The "fuzziness" the decimal-binary conversions introduce disappears in the rounding.

Quote:

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Originally Posted by Usul

ok, this works (if you are interested)

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That's a lot of code for something you can do like:

Code:

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#include <iostream>
#include <string>
#include <sstream>

using namespace std;

unsigned int getDigitsAfterDecimalPoint(double number)
{
        ostringstream o;
        o << number;
        size_t dotpos = o.str().find('.');
        return (dotpos == string::npos ? 0 : o.str().find_last_not_of('0') - dotpos);
}

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