static void Main()
{
Undergraduate boy = new Undergraduate("3210707000", "张三", Gender.MALE, "21信管");
Postgraduate girl = new Postgraduate("2190757001", "李四", Gender.FEMALE, "杨雪梅");
ExchangeStudent newGuy = new ExchangeStudent("20200531001", "王五", Gender.MALE, "20信管", "江西中医药大学");
boy.Register();
girl.Register();
newGuy.Register();
Read();
}
static void Main()
{
Undergraduate boy = new Undergraduate("3210707000", "张三", Gender.MALE)
{
Class = "21信管",
Instructor = "林立" //派生类访问自身的属性；
};
Postgraduate girl = new Postgraduate("2190757001", "李四", Gender.FEMALE);
boy.Intro(); //派生类调用顶层基类的方法；
girl.Intro();
boy.Register(); //派生类调用基类的方法；
girl.Register();
girl.AssignDirection("数据可视化"); //派生类调用自身的方法；
Read();
}