package com.xu.struct;

import java.util.Scanner;

public class IfDemo03 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        /*
        if语句至多有1个else语句，else语句在所有的else if语句之后，
        if语句可以有若干个else if语句，它们必须在else语句之前，
        一旦其中一个else if语句检测为true，其他的else if以及else语句都
        将跳过执行；
         */
        System.out.println("请输入成绩：");
        int score=scanner.nextInt();
        if(score==100){
            System.out.println("恭喜满分");
        }else if(score<100&&score>=90){
            System.out.println("A级");
        }else if(score<90&&score>=80){
            System.out.println("B级");
        }else if(score<80&&score>=70){
            System.out.println("C级");
        }else if(score<70&&score>=60){
            System.out.println("D级");
        }else if(score<60&&score>=0){
            System.out.println("不及格");
        }else{
            System.out.println("成绩不合法");
        }
        scanner.close();//写程序要严谨；
    }
}

"D:\Program Files\Java\jdk1.8.0_281\bin\java.exe" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2021.1\lib\idea_rt.jar=63549:D:\Program Files\JetBrains\IntelliJ IDEA 2021.1\bin" -Dfile.encoding=UTF-8 -classpath "D:\Program Files\Java\jdk1.8.0_281\jre\lib\charsets.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\deploy.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\access-bridge-64.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\cldrdata.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\dnsns.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\jaccess.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\jfxrt.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\localedata.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\nashorn.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\sunec.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\sunjce_provider.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\sunmscapi.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\sunpkcs11.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\ext\zipfs.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\javaws.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\jce.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\jfr.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\jfxswt.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\jsse.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\management-agent.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\plugin.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\resources.jar;D:\Program Files\Java\jdk1.8.0_281\jre\lib\rt.jar;C:\Users\徐文昭\Desktop\JavaSE\out\production\基础语法" com.xu.struct.IfDemo03
请输入成绩：
90
A级

Process finished with exit code 0