用状态空间法求解传教士-野人问题，设计启发式函数引导规则的选用。 通过设计，深入理解状态空间概念与启发式搜索技术，培养一般问题求解能力。-Using state space method for solving the missionaries- Yeti issues, design heuristic function to guide the selection of the rules. By design, in-depth understanding of the conc