Untitled

#include <iostream>
using namespace std;

class ComplexNumber{
private:
    double real;
    double imaginary;
public:
    ComplexNumber(const double r = 0, const double i = 0);

    ComplexNumber operator+(ComplexNumber other);

    friend ComplexNumber operator-(ComplexNumber first, ComplexNumber second);

    void print() {
        cout << real << " + " << imaginary << "i" << endl;
    }

};

ComplexNumber operator-(ComplexNumber first, ComplexNumber second);
ComplexNumber operator-(ComplexNumber first, ComplexNumber second) {
    ComplexNumber temp;
    temp.real = first.real - second.real;
    temp.imaginary = first.imaginary - second.imaginary;
    return temp;
}

ComplexNumber::ComplexNumber(const double r, const double i) : real(r), imaginary(i) {

}

ComplexNumber ComplexNumber::operator+(ComplexNumber other) {
    real += other.real;
    imaginary += other.imaginary;
    return *this;
}


int main()
{
    ComplexNumber test1(2.3, 4.4);
    test1.print();
    ComplexNumber test2(1.1, 2.2);
    test2.print();
    (test1 + test2).print();
    cout << endl;

    ComplexNumber test3(2.3, 4.4);
    test1.print();
    ComplexNumber test4(1.1, 2.2);
    test2.print();
    (test1 - test2).print();
 
}