static void Main(string[] args)
{
Subject subject = new BadMan();
Observer police = new PoliceMan(subject as BadMan);
Observer citizen = new Citizen(subject as BadMan);
Observer wife = new Wife(subject as BadMan);
BadMan badman = subject as BadMan;
badman.RunAway("广西");
Console.WriteLine();
badman.RunAway("海南");
Console.WriteLine();
subject.Detach(wife);
badman.RunAway("美国");
subject.Detach(police);
Console.WriteLine();
badman.RunAway("澳大利亚");
Console.WriteLine();
subject.Detach(citizen);
badman.RunAway("月球");
}
public Citizen(BadMan target)
{
this._target = target;
this._target.Attach(this);
}
public PoliceMan(BadMan target)
{
this._target = target;
this._target.Attach(this);
}
public Wife(BadMan target)
{
this._target = target;
this._target.Attach(this);
}
