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......
        //对比字符串内容相等要用equals()来比较，==用于是否地址值相等
        System.out.print(grade.equals("A")?"优秀":grade.equals("B")?"良好" : grade.equals("C") ?"及格" :grade.equals("D") ?"不及格" :"未知等级" );

    }
}