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);
        char grade =scanner.next().charAt(0);
        switch(grade){
            case 'A':
                System.out.print("优秀");
                break;
            case 'B':
                System.out.print("良好");
                break;
            case 'C':
                System.out.print("及格");
                break;
            case 'D':
                System.out.print("不及格");
                break;
            default:
                System.out.print("未知等级");
                
            
        }
        //write your code here......
        

    }
}