用C语言实现数据结构中的订票功能，运行程序后可选择订票、退订、退出系统三项功能。订票时输入订票人的姓名、身份证号；确定后系统给出订票人的座位号；退票时只输入持票人的身份证号，若该此人已经成功预定机票，则显示退票成功，若没有订过票，则显示没有订过票的提示信息。-Data structure using C language implementation of the booking functions, run the program with an option to booking, unsubscribe, exit the system three functions. When booking, enter the booking person' s name, ID number　determined the system is given a seat number for bookings　Refund enter only when the bearer of the ID number, if the person has been successfully booking tickets is displayed Refund success, if it does not provide for their votes, then the show does not provide for prompt information on their votes.