最小生成树Prim算法。Dandn文件给出了输入参数的名称及格式即在调用prim前先输入邻接矩阵D和节点个数n输入prim得到两行的矩阵T,将上下两行数字对应的节点相连即可。-Prim minimum spanning tree algorithm. The file of Dandn up and down two rows of numbers corresponding node connected to the name and format of the input parameter