#include <conio>
#include <cmath>
#include <iostream>
 
using namespace std;
 
class Num {
protected:
  double re;
 
public:
 
  Num(double data=0) {
    re = data;
  }
 
  double get() {
    return re;
  }
 
  double set(double data) {
    re = data;
    return re;
  }
 
  void show() {
    std::cout << re << "\n";
  }
 
  Num clone() {
    return Num(re);
  }
 
  Num operator +(Num data) {
    return Num(re + data.get());
  }
 
  Num operator +(double data) {
    return Num(re + data);
  }
 
  friend Num operator +(double a, Num &b) {
    return Num(a + b.get());
  }
 
  /*Complex operator =(Num &a, Complex &b) {
    a.set(b.getRe());
    return b.clone();
  }  */
};
 
class Complex : public Num {
private:
  double im;
 
public:
 
  Complex(double data=0, double b = 0) : Num(data) {
    im = b;
  }
 
  Complex (Num data) {
    re=data.get();
    im =0;
  }
 
  Complex clone() {
    return Complex(re, im);
  }
 
  double getRe() {
    return Num::get();
  }
 
  double setRe(double data) {
    return Num::set(data);
  }
 
  double getIm() {
    return im;
  }
 
  double setIm(double data) {
    im = data;
    return im;
  }
 
  void show() {
    std::cout << re << "+i*" << im << "\n";
  }
 
  Complex operator +(Complex &x) {
    return Complex(re + x.getRe(), im + x.getIm());
  }
 
  Complex operator +(Num &x) {
    return Complex(re + x.get(), im);
  }
 
  Complex operator +(double x) {
    return Complex(re + x, im);
  }
 
  friend Complex operator +(Num &a, Complex &b) {
    return Complex(a.get() + b.getRe(), b.getIm());
  }
 
  friend Complex operator +(double a, Complex &b) {
    return Complex(a + b.getRe(), b.getIm());
  }
 
  ~Complex() {
  };
 
};
 
void main() {
 
  Complex a(2, 4);
  Complex b(1);
  Complex c;
 
  Num d(3);
  Num f;
 
  f.show();
  (d + 3).show();
  (f + d + 1).show();
  (1 + d).show();
 
  cout << "------------\n";
 
  c.show();
  (a + b).show();
  (a + 1).show();
  (1 + a).show();
  (a+d).show();
  (d+a).show();
 
  f=((Num)(d+a));
  f.show();
 
  c=f;
  c.show();
 
  getch();
}
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