PTA 7-3 统计学生年龄异常的人数。(10分）

大一不好好学，大二来重修

重修是免听，自己学习

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        Student[] stu = new Student[5];
        int num = 0;
        for (int i = 0; i <= 4;i++) {
            String name = input.next();
            int age = input.nextInt();
            stu[i] = new Student(name, age);
            if (stu[i].Getage() <= 0){
                num++;
            }
        }
        if (num == 0)
            System.out.println("right");
        else if (num == 5)
            System.out.println("all wrong");
        else {
            System.out.println(num);
            for (int i = 0;i <= 4;i++){
                if (stu[i].Getage() <= 0)
                    System.out.println(stu[i].Getname());
            }
        }
        }
    }

     class Student {
        private String name;
        private int age;
        public Student(String name,int age) {
            this.name = name;
            this.age = age;
        }
        public void Setname(String name){
            this.name = name;
        }
        public String Getname(){
            return name;
        }
        public void Setage(int age){
            this.age = age;
        }
        public int Getage(){
            return age;
        }
    }