应用程序在出现挂死和退出时，自动检测进程是否存在，并自动运行应用程序。-Application in the event of death, and hung out, the automatic detection process exists, and automatically run the application.

学习多线程的过关检测题目，编程实现多线程中event-Learning multithreaded clearance detection title, multithreaded programming event