实现一个全国大城市间的交通咨询程序，提供对城市信息的编辑，提供列车时刻表和飞机航班表的编辑，提供三种最优决策：最快到达、最省钱到达、最少中转次数到达。-The realization of a national inter-city traffic consultation process, providing information on the city editor, providing the train schedule and aircraft flight table editing, offers three optimal decision: to reach the fastest, most cost-effective to reach at least the number of transit arrival.