Rational.h

#pragma once

#include <stdlib.h>
#include <iostream>

using namespace std;

#define INVERSE true

class Rational
{
private:
    long long _integer;     // целая часть
    long long _numerator;   // числитель
    long long _denominator; // знаминатель

public:
    Rational(long long numerator = 0, long long denominator = 1);
    Rational(const Rational &temp, bool invert = false);

    Rational &set(long long numerator, long long denominator);
    long long &integer();
    long long &numerator();
    long long &denominator();

    double get_value();
    Rational &simplify();
    Rational &normalize(); // вычисление целой части числа
    Rational &denormalize(); // обратное действие для упрощения вычислений

    friend istream &operator>>(istream &in, Rational &temp);
    friend ostream &operator<<(ostream &out, const Rational &temp);

    Rational &operator=(const Rational &temp);
    Rational &operator=(const long long &temp);

    friend bool operator==(const Rational &r1, const Rational &r2);
    friend bool operator!=(const Rational &r1, const Rational &r2);

    // унарные операторы
    const Rational operator+(); // = delete; // унарный плюс бесполезен
    const Rational operator-();

    // префиксный инкремент
    Rational &operator++();
    Rational &operator--();

    // постфиксный инкремент
    Rational operator++(int);
    Rational operator--(int);

    friend Rational operator+(const Rational &r1, const Rational &r2);
    friend Rational operator+(const Rational &r, long long value);
    friend Rational operator+(long long value, const Rational &r);

    friend Rational operator-(const Rational &r1, const Rational &r2);
    friend Rational operator-(const Rational &r, long long value);
    friend Rational operator-(long long value, const Rational &r);

    friend Rational operator*(const Rational &r1, const Rational &r2);
    friend Rational operator*(const Rational &r, long long value);
    friend Rational operator*(long long value, const Rational &r);

    friend Rational operator/(const Rational &r1, const Rational &r2);
    friend Rational operator/(const Rational &r, long long value);
    friend Rational operator/(long long value, const Rational &r);

    friend Rational &operator+=(Rational &left, const Rational &right);
    friend Rational &operator+=(Rational &left, const long long &right);

    friend Rational &operator-=(Rational &left, const Rational &right);
    friend Rational &operator-=(Rational &left, const long long &right);

    friend Rational &operator*=(Rational &left, const Rational &right);
    friend Rational &operator*=(Rational &left, const long long &right);

    friend Rational &operator/=(Rational &left, const Rational &right);
    friend Rational &operator/=(Rational &left, const long long &right);

    friend bool operator>(const Rational &r1, const Rational &r2);
    friend bool operator<=(const Rational &r1, const Rational &r2);

    friend bool operator<(const Rational &r1, const Rational &r2);
    friend bool operator>=(const Rational &r1, const Rational &r2);

    friend void ShellSort(int n, Rational* mass[]);
};