#include "pch.h"
#include <iostream>
#include <cmath>

using namespace std;

class Complex
{
private:
    double real, imag;

public:
    Complex(double, double);
    void print();

    double abs();

    friend Complex add(Complex, Complex);
    friend Complex sub(Complex, Complex);
    friend Complex mul(Complex, Complex);
};

Complex::Complex(double real, double imag)
{
    this->real = real;
    this->imag = imag;
}

void Complex::print()
{
    cout << real << " + " << imag << "*i" << endl;
}

double Complex::abs()
{
    return(sqrt(real*real + imag * imag));
}

Complex add(Complex c1, Complex c2)
{
    Complex c3(c1.real + c2.real, c1.imag + c2.imag);
    return c3;
}

Complex sub(Complex c1, Complex c2)
{
    Complex c3(c1.real - c2.real);
}

Complex mul(Complex c1, Complex c2)
{

}

int main()
{
    double r, i;

    cout << "Enter the real and imaginary parts of the first complex number: ";
    cin >> r >> i;

    Complex c1(r, i);
    cout << "You have entered the following complex number: ";
    c1.print();
    cout << "Its absolute value is " << c1.abs() << endl << endl;

    cout << "Enter the real and imaginary parts of the second complex number: ";
    cin >> r >> i;
    Complex c2(r, i);
    cout << "You have entered the following complex number: ";
    c2.print();
    cout << "Its absolute value is " << c2.abs() << endl << endl;

    Complex c3 = add(c1, c2);
    cout << "Their sum is: ";
    c3.print();
    cout << "The absolute value of the sum is " << c3.abs() << endl << endl;
}