p2v6changeAquick

代码说明：

说明：  能够根据已知参数计算同步时钟系统的预期寿命。考虑了多个切换器，考虑了节点损坏后只作为从节点、只作为主节点、总线阻塞等情况。(The expected life of synchronous clock system can be calculated according to the known parameters. Several switchers are considered. The node is only used as slave node, only as master node, and bus is blocked.)