if3

package Struct;

import java.util.Scanner;

public class IfDemo3 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
/*
if 语句至少有一个else语句，else语句在所有else if语句之后
if 可以有多个else if 语句
*/
System.out.println("请输入成绩:");
int score = scanner.nextInt();

    if (score==100){
        System.out.println("满分");
    }else if (score<100&&score>=80){
        System.out.println("A");
    }else if (score<80&&score>=60){
        System.out.println("B");
    }else if (score<=60&&score>=0){
        System.out.println("C");
    }else {
        System.out.println("成绩不合法");
    }



    scanner.close();
    //嵌套if结构
    /*
    if (布尔表达式1){
        if(布尔表达式2){
        }
     }
     */

}

}