code for path finder alogrithem used a vasial basic

如果不喜欢在TPathMap外部定义估价函数，可继承TPathMap， 将地图数据的读取和估价函数封装成一个类使用。-If you do not like the definition of valuation in the External TPathMap function, inheritable TPathMap, read the map data and valuation function into a type of packaging used.