CGAL::Gmpzf Class Reference

#include <CGAL/Gmpzf.h>

Definition

An object of the class Gmpzf is a multiple-precision floating-point number which can represent numbers of the form $m*2^e$, where $m$ is an arbitrary precision integer based on the Gmp library, and $e$ is of type long.

This type can be considered exact, even if the exponent is not a multiple-precision number. This number type offers functionality very similar to MP_Float but is generally faster.

Is Model Of:

EuclideanRing

RealEmbeddable

Implementation

The significand $m$ of a Gmpzf is a Gmpz and is reference counted. The exponent $e$ of a Gmpzf is a long.

Related Functions
(Note that these are not member functions.)
std::ostream &	operator<< (std::ostream &out, const Gmpzf &f)
	writes a double approximation of f to the ostream out.
std::ostream &	print (std::ostream &out, const Gmpzf &f)
	writes an exact representation of f to the ostream out.
std::istream &	operator>> (std::istream &in, Gmpzf &f)
	reads a double from in, then converts it to a Gmpzf.

Creation
	Gmpzf ()
	creates a Gmpzf initialized with 0.
	Gmpzf (int i)
	creates a Gmpzf initialized with i.
	Gmpzf (long int l)
	creates a Gmpzf initialized with l.
	Gmpzf (const Gmpz &i)
	creates a Gmpzf initialized with i.
	Gmpzf (const Gmpfr &f)
	creates a Gmpzf initialized with f.
	Gmpzf (double d)
	creates a Gmpzf initialized with d.