#include <iostream>
using namespace std;

class Complex
{
  public:
    Complex& operator+=(const Complex& rhs)
    {
        this->r += rhs.r;
        this->i += rhs.i;
		return *this;
	}

    Complex& operator-=(const Complex& rhs)
    {
        this->r -= rhs.r;
        this->i -= rhs.i;
		return *this;
    }

    Complex& operator*=(const Complex& rhs)
    {
		this->r = (this->r * rhs.r) - (this->i * rhs.i);
		this->i = (this->r * rhs.i) + (this->i * rhs.r);
		return *this;
    }

    Complex() : r(0), i(0) {};
    Complex(int r_) : r(r_), i(0) {}
    Complex(int r_, int i_) : r(r_), i(i_) {}
    Complex(const Complex& rhs) : r(rhs.r), i(rhs.i) {}

    friend std::ostream& operator<<(std::ostream& lhs, const Complex& rhs);
    friend bool operator == (const Complex& lhs, const Complex& rhs);
  private:
	int r;
	int i;
};

std::ostream& operator<<(std::ostream& lhs, const Complex& rhs)
{
    return lhs << '(' << rhs.r << " + " << rhs.i << "i)";
}

bool operator == (const Complex& lhs, const Complex& rhs)
{
	return lhs.r == rhs.r && lhs.i == rhs.i;
}

Complex operator+(const Complex& lhs, const Complex& rhs)
{
    Complex temp(lhs);
    temp += rhs;
    return temp;
}

Complex operator-(const Complex& lhs, const Complex& rhs)
{
    Complex temp(lhs);
    temp -= rhs;
    return temp;
}

Complex operator*(const Complex& lhs, const Complex& rhs)
{
    Complex temp(lhs);
    temp *= rhs;
    return temp;
}


int main()
{
    Complex first;
    Complex second(-4);
    Complex third(1,-2);
    Complex fourth(-1,2);
    Complex fifth(3,0);
    Complex sixth(0,3);
    Complex seventh(5,3);
    Complex eighth(6,10);
    Complex ninth(7,4);
    Complex tenth(-14,8);

    cout << endl;
    if (third == fourth)
      cout << "The complex numbers are equal." << endl;
    else
      cout << "The complex numbers are not equal." << endl;
    if (first == first)
      cout << "The complex numbers are equal." << endl;
    else
      cout << "The complex numbers are not equal." << endl;
    if (first == third + fourth)
      cout << "The complex numbers are equal." << endl;
    else
      cout << "The complex numbers are not equal." << endl;
    cout << endl;
    cout << first << " + " << second << " = " << first + second << endl;
    cout << first << " - " << second << " = " << first - second << endl;
    cout << first << " * " << second << " = " << first * second << endl;
//    cout <<  "-" << second << " = " << -second << endl;

    cout << endl;
    cout << third << " + " << fourth << " = " << third + fourth << endl;
    cout << third << " - " << fourth << " = " << third - fourth << endl;
    cout << third << " * " << fourth << " = " << third * fourth << endl;
//    cout << "-" << third << " = " << -third << endl;

    cout << endl;
    cout << fifth << " + " << sixth << " = " << fifth + sixth << endl;
    cout << fifth << " - " << sixth << " = " << fifth - sixth << endl;
    cout << fifth << " * " << sixth << " = " << fifth * sixth << endl;
//    cout << "-" << fifth - sixth << " = " << -(fifth - sixth) << endl;

    cout << endl;
    cout << seventh << " + " << eighth << " = " << seventh + eighth << endl;
    cout << seventh << " - " << eighth << " = " << seventh - eighth << endl;
    cout << seventh << " * " << eighth << " = " << seventh * eighth << endl;
//    cout << "-" << seventh * eighth << " = " << -(seventh * eighth) << endl;

    cout << endl;
    cout << ninth << " + " << tenth << " = " << ninth + tenth << endl;
    cout << ninth << " - " << tenth << " = " << ninth - tenth << endl;
    cout << ninth << " * " << tenth << " = " << ninth * tenth << endl;
//    cout << "-" << ninth + tenth << " = " << -(ninth + eighth) << endl;
    cout << endl;

    system("pause");
    return 0;
}