static void Main(string[] args)
{
Context context = new Context(new StateA());
context.ChangeState();
context.ChangeState();
Console.ReadLine();
}
public void DoClock(Context context, int hour)
{
if (9 <= hour && hour < 17)
{
context.ChangeState(DayState.GetInstance());
}
}
public void DoClock(Context context, int hour)
{
if (hour < 9 || 17 <= hour)
{
context.ChangeState(NightState.GetInstance());
}
}