利用买飞机票案列来学习流程控制语句 #java

package com.day06.www;

import java.util.Scanner;

//买飞机票

public class Demo01 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入机票的原价：");
        double money = sc.nextDouble();
        System.out.println("请输入购买机票的月份：");
        int month = sc.nextInt();
        System.out.println("请输入你购买的舱位：(头等舱.经济舱)");
        String seat = sc.next();
        //将市场传给形参
        money = count(money, month, seat);
        System.out.println("你需要花费" + money + "元购买这张机票");

    }

    //   定义一个方法：形参（原价、月份、头等舱经济舱） 返回值类型申明：double
    public static double count(double money, int month, String seat) {
        //判断是旺季还是淡季
        if (month == 11 || month == 12 || month >= 1 && month <= 4) {
            //判断舱位是头等舱还是经济舱
            switch (seat) {
                case "头等舱":
                    money *= 0.7;
                    break;
                case "经济舱":
                    money *= 0.65;
                    break;
                default:
                    System.out.println("输入的座位舱位有误");
                    money = -1;
            }
        } else if (month >= 5 && month <= 10) {
            switch (seat) {
                case "头等舱":
                    money *= 0.9;
                    break;
                case "经济舱":
                    money *= 0.85;
                    break;
                default:
                    System.out.println("输入的座位舱位有误：");
                    money = -1;
            }
        } else {
            System.out.println("输入的月份有误");
            money = -1;
        }
        return money;
    }
}