编译原理-有限自动机的运行，/程序功能： 利用状态表和有限自动机的运行原理，识别一个输入串是否为一个有效的无符号定点实数。-runs of finity auto-machine

compiler principle: runs of finity auto-machine

function of programme: utilize the table of state and the running principle of finity auto-machine, identify whether one input string is the valid unsigned decide-point real number