static void Main(string[] args)
{
var subject = new Subject();
new HexaObserver(subject);
new OctalObserver(subject);
new BinaryObserver(subject);
Console.WriteLine("First state change: 15");
subject.SetState(15);
Console.WriteLine();
Console.WriteLine("Second state change: 10");
subject.SetState(10);
Console.ReadKey();
}
static void Main(string[] args)
{
Subject subject = new Subject();
new Addition(subject);
Console.WriteLine("Addition : 15");
subject.SetState(15);
}