用A星算法解决旅行商（货郎担）问题，附设计报告和测试用例-A Star algorithm used to solve TSP (traveling salesman) problems, with the design of reports and test cases

用A星算法解决的TSP问题，其中的选择函数用的是最小生成树-A star with the algorithm to solve the TSP problems, the selection function using a minimum spanning tree