package Student;

public class Student {

    protected String name;
    protected int age;
    
    public Student(String name, int age){
        this.name = name;
        this.age = age;
    }
    
    public void show() {
        System.out.println("姓名：" + this.name + ";" + "年龄：" + this.age);
    }
    
    public static void main(String[] args){
        Student student = new Student("小红", 19);
        Undergraduate unstudent = new Undergraduate("小明", 18, "计算机");
        student.show();
        unstudent.show();
    }
}

class Undergraduate extends Student{
    private String degree;
    
    public Undergraduate(String name, int age, String degree){
        //调用父类构造函数
        super(name, age);
        this.degree = degree;
    }

    //重写父类show方法
    @Override
    public void show() {
        System.out.println("姓名：" + this.name + ";" + "年龄：" + this.age + ";" + "专业：" + this.degree);
    }
}