public class Person{
    public Person(){}
    public String name = "tom";
    public int age = 1int sex = 0;
    void showInfo(){
        System.out.println(this.name);
        System.out.println(.age);
        System.out.println(.sex);
    }
    void seInfo(String name,int age,1)">int sex){
        this.name = name;
        this.age = age;
        this.sex = sex;
    }
}

class Student extends Student(){
        super();
    }
    public String school;
}