用户输入节点总数、拓扑层数、流量矩阵，生成拓扑图。另可去掉注释再输入流量分配矩阵，得出带链路利用率的拓扑图。-User input total number of nodes, topology layers, traffic matrix, generated topology. Another comment may be removed and then enter the traffic distribution matrix, derived topology with link ut