class Person{
 String name="小花";
 int age=19;
 void eat(){
  System.out.println("在吃饭");
 }
}
class Student extends Person{
 void study(String name,int age){
  System.out.println(age+"岁"+name+"在学语文");
 }
}
class Student1 extends Person{
 void study(String name,int age){
  System.out.println(this.age+"岁"+this.name+"在学数学");
 }
}

public class text18 {
 public static void main(String[] args){
  Student Str=new Student();
  Student1 str=new Student1();
  Str.study("小明", 17);
  str.study("校长",18);
 }
}