一个航空客运订票系统。用C++实现。系统能实现的操作和功能：①查询航线，②承办订票业务③承办退票业务。主要用线性表实现。-An air passenger booking system. Using C++ to achieve. System to achieve the operations and functions: ① query route, ② ③ contractors contractors refund booking business operations. Linear