//
void UnitTest()
{
ObjectStructure theStructure = new ObjectStructure();
// 将Vicitor走访ObjectStructure裡的各元表
theStructure.RunVisitor(new ConcreteVicitor1());
theStructure.RunVisitor(new ConcreteVicitor2());
}
void Start()
{
ObjectStructure structure = new ObjectStructure();
structure.RunVisitor(new ConcreteVicitor());
}