题解 | #判断学生成绩等级#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String grade =scanner.next();

        //write your code here......
       if(grade.equals("A")){
          System.out.println("优秀");
       }else if(grade.equals("B")){
          System.out.println("良好");
       }else if(grade.equals("C")){
          System.out.println("及格");
       }else if(grade.equals("D")){
          System.out.println("不及格");
       }else{
        System.out.println("未知等级");
       }


    }
}