为鼓励居民节约用水,自来水公司采取按用水量阶梯式计价

package Shiyan;

import java.util.Scanner;

public class Jvmingyongshui {
    public static void main(String[] args) {

        double x = 0.0;
        double y = 0.0;
        Scanner input = new Scanner(System.in);
        System.out.println("请输入水量，回车确认：");
        x = input.nextDouble();
        if(x<=15){
            y = 4*x/3;
        }else {
            y = 2.5*x-17.5;
        }
        System.out.println("水费为："+y);

    }
}