Convert pmt to double if possible.
Returns the number closest to that is representable as a double. The argument must be a real or integer, otherwise a wrong_type exception is raised.
Return the pmt value that represents double .
return true if is a complex number, false otherwise.
If is complex, real or integer, return the closest complex<double>. Otherwise, raise the wrong_type exception.
Return a complex number constructed of the given real and imaginary parts.
Return a complex number constructed of the given real and imaginary parts.