---

#include <iostream>
#include <string>
using namespace std;
class Complex {
public:
    double real, imag;
    Complex(double r = 0, double i = 0) {
        real = r;
        imag = i;
    }
    Complex operator+(Complex other) {
        return Complex(real + other.real, imag + other.imag);
    }
    bool operator==(Complex other) {
        return real == other.real && imag == other.imag;
    }

}
ostream & operator<<(ostream& os, Complex c) {
    os << c.real << " + " << c.imag << "i";
    return os;
} class Vector2D {
    private:
        double x;
        double y;
    public:
        Vector2D(double x = 0, double y = 0) : x(x), y(y) {} Vector2D operator*(double scalar) const {
            return Vector2D(x * scalar, y * scalar);
        }
            class Student 
            {

                bool operator>(const Student& other) const {
                    return gpa > other.gpa;
                }
            

            private:
                string name;
                double gpa;
            public:
            };
    
        
            int main()
            {
                Complex c1(2, 3), c2(1, 4);
                Complex sum = c1 + c2;
                cout << "Sum: " << sum << endl;
	
                (5, 7), 2(2, 3);
                diff = -;
                scaled = *3;

                Student s1("Vova", 4.5), s2("Dima", 3.8);
                if (s1 > s2) cout << " has higher GPA" << endl;

                Complex c3(2, 3);
                if (c1 == c3)  cout << "Complex numbers are equal" << endl;

                return 0;
            }