A商店准备在今年夏天开始出售西瓜西瓜的售价如下，20斤以上的每斤0.85元；重于15斤轻于等于20斤的，每斤0.90元；重于10斤轻于等于15斤的，每斤0.95元；重于5斤轻于等于10斤的，每斤1.00元；轻于或等于5斤的，每斤1.05元。现在为了知道商店是否会盈利要求A公司帮忙设计一个输入西瓜的重量和顾客所付钱数，输出应付货款和应找钱数。
public static void main(String[] args) {// TODO Auto-generated method stubSystem.out.println("输入西瓜的重量：");Scanner sc = new Scanner(System.in);double zhongliang = sc.nextDouble();System.out.println("请输入顾客所付钱数：");double m = sc.nextDouble();double qian = money(zhongliang);double zhaoqian = m-Double.parseDouble(String.format("%.2f", qian));if(zhaoqian <=0) {double zaifuqian = zhaoqian * -1;System.out.println("应付货款"+qian+"元，还需再付"+zaifuqian+"元");}else {System.out.println("应付"+qian+"元，应找"+zhaoqian+"元");}}public static double money(double zhongliang) {if(zhongliang <=5) {return zhongliang*1.05;}else if(zhongliang <=10 ) {return zhongliang*1;}else if(zhongliang <=15) {return zhongliang*0.95;}else if(zhongliang <=20) {return zhongliang*0.9;}else {return zhongliang*0.85;}}
