class Person{

private String name;

private String addr;

private char sex;

private int age;

public void setName(String name){

this.name = name;

}

public void setAddr(String addr){

this.addr = addr;

}

public void setSex(char sex){

this.sex = sex;

}

public void setAge(int age){

this.age = age;

}

public Person(String name,String addr,char sex,int age){

this.setName(name);

this.setAddr(addr);

this.setSex(sex);

this.setAge(age);

}

public Person(String name,int age){

this.setName(name);

this.setAge(age);

}

public Person(){}

public String getInfo(){

return "name: "+this.name+

"; addr: "+this.addr+

"; sex: "+this.sex+

"; age: "+this.age;

}

public void say(){

System.out.println(this.getInfo());

}

}

class Student extends Person{

private int math;

private int english;

public void setMath(int math){

this.math = math;

}

public void setEnglish(int english){

this.english = english;

}

public Student(String name,String addr,char sex,int age,int math,int english){

super(name,addr,sex,age);

this.math = math;

this.english = english;

}

public Student(String name,int age){

super(name,age);

}

public Student(){};

public String getInfo(){

return super.getInfo()+

"; math: "+this.math+

"; english: "+this.english;

}

public void say(){

super.say();

}

}

public class Test{

public static void main(String[] args){

Person per1 = new Person("小赵",22);

Person stu1 = new Student("小钱","北京",'M',20,80,90);

Student stu2= new Student("小孙","河北",'M',21,85,95);

per1.say();

stu1.say();

stu2.say();

}

}