一、民航管理系统设计： 民航系统功能：能给客户提供订票、退票的功能，还能浏览航班航线信息（如航班号、航线、飞行时间及成员订额）和查询航班信息； 民航系统的具体实现如下形式： 1.系统以菜单方式工作 2.航班信息录入功能(航班信息用文件保存)－－输入 3.航班信息浏览功能－－输出 4.查询航线（按航班号查询） 5.承办订票和退票业务 -First, civil aviation management system design: civil aviation system functions: to give customers booking, a refund of the function, but also visit the flight route information (such as flight number, route, flight time and set the amount of members) and check their flight information　CAD system concrete realization of the following forms: 1. system to work the way the menu 2. Flight Information recording function (flight information with file)- Enter 3. Flight Information browsing- output 4. query route (by flight number inquiries) 5. contractors reservations and refund operations