header

#pragma once
#include <iostream>

class Complex {
    double re;
    double im;

public:
    Complex(double real_part, double imag_part);
    ~Complex();

    Complex operator+(const Complex& rhs);
    Complex operator*(const Complex& rhs);
    Complex operator*(const int rhs);
    Complex operator*(const double rhs);
    Complex& operator+=(const Complex& c1);

    friend std::ostream& operator<<(std::ostream& os, const Complex& rhs);
    std::ostream& operator<<(std::ostream& os);
    // +=
    // (int/double/complex)*(int/double/complex)
};