利用图论中生成树的概念编写的全部生成树代码，由于缺少中间的实数编码遗传算法代码，所以还不能得出完整的结果，但整个程序框架是正确的！-Spanning tree in graph theory using the concept of writing all the spanning tree code, the lack of the middle of the real-coded genetic algorithm code, so it can not come to a complete