#include <iostream>
#include <cmath>

using namespace std;

class Complex {
  private:
    double re, im;

  public:
    Complex (double re_=0, double im_=0) : re(re_), im(im_) {}

    double real() { return (*this).re; }
    double imag() { return   this->im; }

    double abs() {
      return sqrt( (*this).real()*(*this).real() + (this->imag())*(this->imag()) );
    }
};

int main() {
  Complex z{1.0, 2.0};

  cout <<    "Re z = "  << z.real()
       << "   Im z = "  << z.imag()
       <<   "   |z| = " << z.abs()
       << endl;

  return 0;
}