主要解决一个在旅行过程中的费用问题，关键是利用Dijkstra算法求解欧洲两个城市之间的最便宜的乘车路线，并把最短花费、路径的距离以及过的城市显示出来。-Is mainly to solve a process of in travel costs, the key is to use Dijkstra algorithm to solve Europe between the two cities the cheapest travel routes, and to take the shor