定义类，假定民航机场共有n个航班，每个航班有一航班号、确定的航线（起始站、终点站）、确定的飞行时间（星期几）和一定的成员订额。-Define a class, it is assumed that there are n Civil Airport flights, each flight has a flight number, determine the route (starting station, terminal), to determine the flight time (a f