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();
        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");
        }
    }
}