---

class MyCmplx { 
public:
  double re;
  double im;
  MyCmplx(double r, double i) { re = r; im = i; }
  MyCmplx() { re = im = 0; }
};
static MyCmplx operator+ (MyCmplx& lhs, MyCmplx& rhs)  {
  MyCmplx ret(0,0);//re, im
  ret.re = lhs.re + rhs.re;
  ret.im = lhs.im + rhs.im;
  return ret;
}
ostream& operator << (ostream& strm, MyCmplx& rhs)  {
  return strm << "(" << rhs.re << ", " << rhs.im << "*i)";
}
int main()
{// (4 + 5i) + (7 + 3i)
  MyCmplx c1(4, 5);
  MyCmplx c2 (7, 3);
  cout << c1 << endl << c2 << endl;

  MyCmplx c3;
  c3 = c1 + c2;
  cout << c1 <<  " + " << c2 << " = " << c3 << endl;
  MyCmplx c4;
  c2.re = 0;
  c2.im = 0;
}