#include <iostream>

#include <cmath>

struct ComplexPolar;


struct Complex {
    double a, b;

    ComplexPolar GetComplexPolar();

    void Print() {
        std::cout << a << " + " << b << " * i" << std::endl;
    }
};


struct ComplexPolar {
    double r, phi;
    Complex GetComplex() {
        return Complex{r * std::cos(phi), r * std::sin(phi)};
    }

    void Print() {
        std::cout << r << "(cos(" << phi << ") + sin(" << phi << "))" << std::endl;
    }
};


ComplexPolar Complex::GetComplexPolar() {
    return ComplexPolar{std::sqrt(a * a + b * b), std::atan(b / a)};

}

int main() {

    ComplexPolar a{1, 2};
    a.Print();
    return 0;
}