static void Main(string[] args)
{
TravelManager tm = new TravelManager();
tm.ToIndia();
tm.ToUK();
tm.ToUS();
tm.ToIndia();
Console.ReadLine();
}
public abstract void ToUS(TravelManager tm);
public abstract void ToIndia(TravelManager tm);
public void ChangeState(TravelManager tm, State s)
{
tm.ChangeState(s);
}
public override void ToUS(TravelManager tm)
{
Console.WriteLine("To US");
ChangeState(tm, US.Instance());
}
public override void ToIndia(TravelManager tm)
{
Console.WriteLine("Already In India");
}
public override void ToUK(TravelManager tm)
{
Console.WriteLine("Already In UK");
}
public override void ToIndia(TravelManager tm)
{
Console.WriteLine("To India");
ChangeState(tm, India.Instance());
}