//4.
public void Tick(int hour, int min, int sec)
{
Console.WriteLine($"Clock is ticking to {hour}:{min}:{sec}");
TickEventArgs args = new TickEventArgs()
{
Hour = hour,
Min = min,
Sec = sec
};
//触发Ticking事件
Ticking(this, args);
}
//6.
void Clock_IsTicking(object sender, TickEventArgs args)
{
Console.WriteLine($"Clock is ticking!");
}