package cn.hfkh.oop04;

 class Person03 {
	String name = "李光";  //姓名
	public Person03(){
		//super();写不写该句，效果一样
		System.out.println("execute Person03()");
	}
	public Person03(String name){
		this.name = name;
		System.out.println("execute Person03(name)");
	}

}
 class Student extends Person03{
	 String school = "北大青鸟";  //学校
	 public Student(){
		//super();写不写该句，效果一样
		 System.out.println("execute Student()");
	 }
	 public Student(String name, String school){
		 super(name);
		 this.school = school;
		 System.out.println("execute Student(name,school)");
	 }
 }
 class PostGraduate extends Student{
	 String guide;  //导师
	 public PostGraduate(){
		 System.out.println("execute PostGradute()");
	 }
	 public PostGraduate(String name,String school,String guide){
		 super(name,school);
		 this.guide = guide;
		 System.out.println("excute PostGraduate(name,school,guide)");
	 }
 }
 class TestInherit{
	 public static void main(String[] args) {
		PostGraduate pgdt = null;
		pgdt = new PostGraduate();
		System.out.println();
		pgdt = new PostGraduate("刘志同","北京大学","王老师");
	}
 }