How to get rid of minus sign from signed zero

Question

I am using asin to calculate the angle. The code is as below :

double FindAngle(const double theValue)
{
     return asin(theValue);
}

Find

Answer 1

If you just want to convert -0 to 0 and leave other untouched, just do a comparison.

double FindAngle(double value) {
    double res = asin(value);
    if (res == 0.0) res = 0.0;
    return res;
}