static void Main(string[] args)
{
complex c = new complex(5, 4);
complex d = new complex(11, 5);
complex w = c + d;
complex f = c - d;
complex k = c * d;
Console.WriteLine(w);
Console.WriteLine(f);
Console.WriteLine(k);
Console.ReadKey();
}
public static complex operator *(complex c1, complex c2)
{
complex c3 = new complex(c1.a * c2.a, c1.b * c2.b);
return(c3);
}