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Console.WriteLine("({0}--{0})", this.re, this.im);

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Console.WriteLine("({0}--{1})", this.re, this.im);

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

namespace ConsoleApplication1
{
    class Complex
    {
        private float re = 0.0F;
        private float im = 0.0F;

        public void Init(float wert1, float wert2)
        {
            this.re = wert1;
            this.im = wert2;
        }
        public void Print()
        {
            Console.WriteLine("({0}--{1})", this.re, this.im);
        }
        public void Add1(Complex ctmp)
        {
            this.re += ctmp.re;
            this.im += ctmp.im;
        }
        public Complex Add2(Complex ctmp)
        {
            this.re += ctmp.re;
            this.im += ctmp.im;
            return this;
        }
        public Complex Add3(Complex ctmp)
        {
            ctmp.re += this.re;
            ctmp.im += this.im;
            return ctmp;
        }
        public Complex Add4(params Complex[] complexestmp)
        { 
            Complex ctmp = new Complex();
            ctmp.re = 0; ctmp.im = 0;
            int count = complexestmp.Length;
            for (int i = 0; i < count; i++)
            {
                ctmp.re += complexestmp[i].re;
                ctmp.im += complexestmp[i].im;
            }
            return ctmp;
        }
    }


    class Program
    {
        static void Main(string[] args)
        {
            Complex c1 = new Complex();
            Complex c2 = new Complex();
            Complex c3 = new Complex();
            c1.Init(1, 2);
            c2.Init(3, 4);
            c3.Init(5, 6);
            c1.Add1(c2);
            c1.Print();
            c1.Init(1, 2);
            c1.Add2(c2).Add2(c3);
            c1.Print();
            c1.Init(1, 2);
            c1 = c1.Add3(c2.Add3(c3));
            c1.Print();
            c1 = c1.Add4(c2, c3, c1, c2);
            c1.Print();
            Console.ReadLine();
        }
    }
}