#include <iostream>

using std::cout;
using std::cin;
using std::endl;

class ComplexNumber {
    private:
        double real;
        double imaginary;
    public:
        ComplexNumber(void) {
            real = 0.0;
            imaginary = 0.0;
        }
        ComplexNumber(double re, double img) {
            real = re;
            imaginary = img;
        }
        void setnumber(void) {
            cout << "Enter the real part\n";
            cin >> real;
            cout << "Enter the imaginary part\n";
            cin >> imaginary;
            printnumber();
        }
        void printnumber(void) {
            if (imaginary > 0.0) {
                cout << "The number is: " << real << " + " << imaginary << "i" << endl;
            }
            else {
                cout << "The number is: " << real << " " << imaginary << "i" << endl;
            }
        }
        double absolute_value(void) {
            double ab_val = sqrt(real*real + imaginary*imaginary);
            return ab_val;
        }
        void addition(double re, double img) {
            cout << "The number is: " << real + re << " " << imaginary + img << "i" << endl;
        }
};

int main(void) {
    ComplexNumber c1(2, -2);
    c1.printnumber();
    c1.addition(-2, 2);
    cout << c1.absolute_value();

    return 0;
}