题解 | #简单运算#

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......
    switch(grade){
        case "A":
            System.out.println("优秀");
            break;
        case "B":
            System.out.println("良好");
            break;
        case "C":
            System.out.println("及格");
            break;
        case "D":
            System.out.println("不及格");
            break;
        default:
            System.out.println("未知等级");
    }

}

}