---

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    class Cmplx    {
        public double re;
        public double im;
        public Cmplx(double re, double im)   {  this.re = re;  this.im = im;    }
        public Cmplx() { this.re = this.im = 0; }
        public static Cmplx operator+(Cmplx l, Cmplx r)    {
            Cmplx ret = new Cmplx();
            ret.re = l.re + r.re;
            ret.im = l.im + r.im;
            return ret;
        }
    }
    
    internal class Program
    {
        static void Main(string[] args)
        {
            Cmplx c1 = new Cmplx(3.0, 5.0);
            Cmplx c2 = new Cmplx(1.0, 2.0);
            Cmplx c3 = c1 + c2;
        }
    }
}