harkach

#include <iostream>
using namespace std;

class Fraction
{
private:
    int value, x, y, z;
public:
    Fraction::Fraction() {};
    Fraction(int a) : value(a) {};

    friend const Fraction& operator+(const Fraction& a);

    friend const Fraction operator-(const Fraction& a);

    friend const Fraction& operator*(const Fraction& a);

    friend const Fraction& operator/(const Fraction& a, const Fraction& b);

    friend bool operator==(const Fraction& a, const Fraction& b);

    Fraction& operator=(const Fraction& a)
    {

        if (this == &a)
        {
            return *this;
        }
        value = a.value;
        return *this;
    }

    friend bool operator!=(const Fraction &a, const Fraction &b);

    friend bool operator<(Fraction const & a, Fraction const & b);

    friend bool operator>(Fraction const & a, Fraction const & b);

    friend ostream& operator << (ostream &a, const Fraction &b);

    friend istream& operator >> (istream &a, Fraction &b);


};




const Fraction& operator+(const Fraction& a)
{
    return a.value;
}

const Fraction operator-(const Fraction& a)
{
    return Fraction(-a.value);
}

const Fraction& operator*(const Fraction& a)
{
    return a.value;
}

const Fraction& operator/(const Fraction& a, const Fraction& b)
{
    return Fraction(-a.value);
}

bool operator==(const Fraction& a, const Fraction& b)
{
    return a.value == b.value;
}

bool operator!=(const Fraction &a, const Fraction &b)
{
    return !(a == b);
}

bool operator <(Fraction const & a, Fraction const & b)
{
    return a < b;
}

bool operator >(Fraction const & a, Fraction const & b)
{
    return a > b;
}

ostream& operator << (ostream &a, const Fraction &b)
{
    a << '(' << b.x << ", " << b.y << ", " << b.z << ')';
    return a;
}

istream& operator >> (istream &a, Fraction &b)
{
    cout << "Введите Fraction.\nX:";
    cin >> b.x;
    cout << "\nY:";
    cin >> b.y;
    cout << "\nZ:";
    cin >> b.z;
    cout << endl;
    return a;
}

int main() {

}