class Primarystudent extends Student {
protected int grade; public Primarystudent(String name,int age,int score,int grade){
super(name, age, score); this.grade = grade; System.out.println("你好，"+name+"小朋友！"+"你今年"+age+"岁，正在上"+grade+"年级"+"你这次的成绩是"+score+"分。"); }
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Ashen One
class Primarystudent extends Student {
protected int grade;
public Primarystudent(String name,int age,int score,int grade){
super(name, age, score);
this.grade = grade;
System.out.println("你好，"+name+"小朋友！"+"你今年"+age+"岁，正在上"+grade+"年级"+"你这次的成绩是"+score+"分。");
}