定义一个父类Person，属性包含姓名、地址、城市、国家、邮编，方法包括构造方法、分别设置各个属性、分别

定义一个父类Person，属性包含姓名、地址、城市、国家、邮编，方法包括构造方法、分别设置各个属性、分别返回各个属性、显示所有属性。Person子类有两个：学生类和教师类。
学生类自己的属性包括主修专业、学号、年级、成绩（成绩每名同学包括3门成绩），增加的方法包括设置和返回增加的属性，显示方法以及构造方法，
教师类自己的属性包括部门、收入，增加的方法包括设置和返回增加的属性，显示方法以及构造方法.

public class Person{
private String name;
private String address;
private String city;
public Person(){

}
}

public class person { private string name; private string address; private string city; private string country; private string postcode; public person(string name, string address, string city, string country, string postcode) { this.name = name; this.address = address; this.city = city; this.country = country; this.postcode = postcode; } public string getname() { return name; } public void setname(string name) { this.name = name; } public string getaddress() { return address; } public void setaddress(string address) { this.address = address; } public string getcity() { return city; } public void setcity(string city) { this.city = city; } public string getcountry() { return country; } public void setcountry(string country) { this.country = country; } public string getpostcode() { return postcode; } public void setpostcode(string postcode) { this.postcode = postcode; } } class student extends person{ public student(string name, string address, string city, string country, string postcode) { super(name, address, city, country, postcode); } } class teacher extends person{ public teacher(string name, string address, string city, string country, string postcode) { super(name, address, city, country, postcode); // todo auto-generated constructor stub } } //参考一下吧