#include <iostream>
using namespace std;

class Complex {
private:
    double re, im;
public:
    // ham tao thiet lap tu hai so
    Complex(double r = 0, double i = 0) : re(r) , im(i) { }
    // ham copy tu mot so phuc
    Complex (Complex &C): re(C.re), im(C.im) { }
public:
    Complex operator + (Complex c);
    Complex operator - (Complex c);
    Complex operator * (Complex c);
    Complex operator / (Complex c);
public:
    friend ostream& operator << (ostream& out, Complex &C) {
        return (out << '(' << C.re << ", " << C.im << "i) " );
    }
};
// Thiet ke cac toan tu cong, tru, nhan, chia
Complex Complex:: operator + (Complex C)
{
    return Complex(this->re + C.re, this -> im + C.im );
}
Complex Complex:: operator - (Complex C)
{
    return Complex(this -> re  C.re, this -> im - C.im );
}
Complex Complex:: operator * (Complex C)
{
    return Complex(this -> re * C.re - this -> im * C.im, this -> re * C.im + this -> im * C.re);
}
Complex Complex:: operator / (Complex C)
{
    return Complex((this -> re * C.re + this -> im * C.im)/(this -> re * this -> re + this -> im * this -> im), (this->re * C.im - this->im * C.re)/(this -> re * this -> re + this -> im * this -> im));
}

int main() {
    // khai bao bien
    double a = 2, y, z;
    y = Complex::Complex(1,2);
    z = Complex::Complex(0,6);
    // tinh thu
    cout << y << " + " << z << = << y + z + a << endl;
    cout << y << " - " << z << = << y - z << endl;
    cout << y << " * " << z << = << y * z << endl;
    cout << y << " / " << z << = << y / z << endl;
    system("pause");
    return 0;
}