// Surcharge d'opérateur en C# (http://www.coacoacoa.net/mai02/complex.txt)
// Basé sur un code de c2i.fr (http://www.c2i.fr/code.aspx?IDCode=371)

using System;

public class Complex
{
      private double _a;
      private double _b;
      //Contructeurs
      public Complex() {} 
      public Complex(double a, double b)
      {
            _a = a;
            _b = b;
      }
      //méthodes
      public override string ToString()
      {return _a.ToString() + " + " + _b.ToString() + "i"; }
      //propriétés
      public double a 
      {
            set{_a=value;}
            get{return _a;}
      }
      public double b 
      {
            set{_b=value;}
            get{return _b;}
      }
      //opérateurs
      public static Complex operator+(Complex C1,Complex C2)
      {
            Complex C = new Complex();
            C.a = C1.a + C2.a;
            C.b = C1.b + C2.b;
            return C;
      }
      public static Complex operator-(Complex C1,Complex C2)
      { 
            Complex C = new Complex();
            C.a = C1.a - C2.a;
            C.b = C1.b - C2.b;
            return C;
      }
      public static Complex operator*(Complex C1,Complex C2)
      {
            Complex C = new Complex();
            C.a = C1.a * C2.a - C1.b * C2.b;
            C.b = C1.a * C2.b + C1.b * C2.a; 
            return C;
      }
}


// Main Program 
class mcStart
{
   public static void Main()
   {
     Complex C1 = new Complex(1,1);
     Complex C2 = new Complex(1,2); 
     Console.WriteLine("Complex C1 : " + C1.ToString());
     Console.WriteLine("Complex C2 : " + C2.ToString() + "\r\n");
     Console.WriteLine("Addition : " + (C1 + C2).ToString());
     Console.WriteLine("Soustraction : " + (C1 - C2).ToString());
     Console.WriteLine("Multiplication : " + (C1*C2).ToString());
   }
}