#include <iostream>

class Complex
{
public:
    double re;
    double im;
 
    Complex(double real, double imag): re(real), im(imag) {};
 
    //operatori supraîncărcaţi ca funcţii membre
    Complex operator+(const Complex& d);
    Complex operator-(const Complex& d);
    Complex& operator+=(const Complex& d);
    
    friend std::ostream& operator<< (std::ostream& out, const Complex& z);
    friend std::istream& operator>> (std::istream& is, Complex& z);
};