class PrimaryStudent extends Student {
private int grade;
public PrimaryStudent(String name, int age, int score, int grade){
super(name,age,score);
this.grade=grade;
}
public int getGrade(){return grade;}
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用户6617885566
class PrimaryStudent extends Student {
private int grade;
public PrimaryStudent(String name, int age, int score, int grade){
super(name,age,score);
this.grade=grade;
}
public int getGrade(){return grade;}
}