JAVA三目语句

package project_8_30;import java.util.Scanner;public class Count{public static void main(String[] args){Scanner sc=new Scanner (System.in);System.out.println("请输入商品价格：");double price=sc.nextDouble();double discount=0;discount=price>=2000?0.8:(price>=1000?0.85:(price>=500?0.9:(price>0?1:0)));if(discount==0){System.out.println("输入有误！！！请输入正数：");return;}else{price=price*discount;System.out.println("打折后商品价格为：  "+price);}}}