线程属性的设置，创建一个具有绑定和分离属性的线程，而且主线程通过一个finish-flag标志变量来获得线程结束的消息，而且不调用pthread-join（）函数-Thread attributes Settings, create a thread binding and separation properties, and the main thread through a finish- flag symbol variables to get the message thread ends, and do not call the pthread- join () function