event practice

delegate void EventHandler(string message);

class MyNotifier {
    public event EventHandler SomethingHappend;
    public void DoSomething(int number) {
        int temp = number % 10;

        if(temp != 0 && temp % 3 == 0) {
            SomethingHappend(String.Format("{0} : 짝", number));
        }
    }
}

class Program {
    static public void MyHandler(string message) {
        Console.WriteLine(message);
    }
        
    static void Main(string[] args) {
        MyNotifier notifier = new MyNotifier();
        notifier.SomethingHappend += new EventHandler(MyHandler);

        for (int i = 1; i < 30; i++) {
            notifier.DoSomething(i);
        }
    }
}