#include <iostream>
#include <cmath>
using namespace std;

class Complex {  

    double re, im;

  public:

    Complex ();			// konstruktor klasy
    Complex (double, double);  	// konstruktor klasy
    ~Complex ();		//  destruktor klasy

    void ustaw (double, double);
    double modul ();
};


Complex::Complex () {
  re = 0;
  im = 0;
  cout << "Wywolany konstruktor ()\n" ; 
}

Complex::Complex (double a, double b) {
  re = a;
  im = b;
  cout << "Wywolany konstruktor (" << a << ',' << b << ")\n"; 
}

Complex::~Complex () {
  cout << "Wywolany destruktor.\n" ; 
}

void Complex::ustaw (double a, double b) {
  re = a;
  im = b;
}

double Complex::modul () {
  return sqrt(re*re + im*im) ;
}


int main ()
{
  Complex z;
  z.ustaw (3,4);
  cout << "Modul z  wynosi: " << z.modul() << endl;

  Complex z2 (5,6) ;
  cout << "Modul z2 wynosi: " << z2.modul() << endl;

  return 0;
}