\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)

CGAL 4.3 - Number Types

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CGAL::Rational_traits< NT > Class Template Reference
Relates Rational

`#include <CGAL/Rational_traits.h>`

## Definition

The class `Rational_traits` can be used to determine the type of the numerator and denominator of a rational number type as `Quotient`, `Gmpq`, `mpq_class` or `leda_rational`.

## Types
typedef unspecified_type | RT
| the type of the numerator and denominator.

## Operations
RT | numerator (const NT &r) const
| returns the numerator of `r`.
RT | denominator (const NT &r) const
| returns the denominator of `r`.
NT | make_rational (const NT &x) const
| returns self.
NT | make_rational (const std::pair< RT, RT > &p) const
| constructs a rational number `p.first/p.second`.
NT | make_rational (const RT &n, const RT &d) const
| constructs a rational number.
NT | make_rational (const NT &n, const NT &d) const
| constructs a rational number.