该程序主要实现车票的查询，购买，退票的功能，在运行时都会出现提示下一步的操作，列车可自行添加，最多列车数也可方便的更改-The procedure to achieve ticket inquiries, purchase, refund of the function, at run time will be prompted to the next step, the train can add up the number of trains can also be convenient t