public static void main(String[] args) {

//键盘输入
        Scanner sc = new Scanner(System.in);
        System.out.println("输入机票的原价");
        double money = sc.nextDouble();
        System.out.println("请输入机票类型");
        String type = sc.next();
        System.out.println("请选择月份");
        int month = sc.nextInt();

        //调用方法（输出调用）
        System.out.println("机票现价是" + calc(money,type,month));

    }

    public static double calc(double money,String type,int month){
        //判断用户选择的信息情况
        if (month >=5 && month <=10){
            //旺季
            switch (type){
                case"头等舱":  money *= 0.9;
                break;

                case"经济舱":  money *= 0.85;
                break;

                default:
                    System.out.println("没有您要的座位类型");
                    money = -1;
            }
        }else if (month == 11 || month == 12 || month >= 1 && month<=4){
            switch (type){
                case"头等舱":  money *= 0.8;
                    break;

                case"经济舱":  money *= 0.75;
                    break;

                default:
                    System.out.println("没有您要的座位类型");
                    money = -1;
            }
        }else{
            System.out.println("对不起，您输入的月份有误");
            return -1; //表示无法计算价格
        }
        return money;
    }