import java.util.Scanner;


public class javaclassmember {

public static void main(String[] args){

System.out.println("请输入成绩：");
Scanner scan = new Scanner(System.in);
Float score = scan.nextFloat();
if(score<60){
System.out.println("不及格");
}
else if (score<80){
System.out.println("及格");
}
else if (score<90){
System.out.println("良好");
}
else{
System.out.println("优秀");

}

}

奈斯