在qtcreator下编写的强制定时关机系统，熟悉qt信号和槽传递过程的练习程序，在pc上运行平稳。label添加.png图片和更改图标icon。lineEdit中的信息读取，windows内核命令的调用执行及相关关机配置(The mandatory timing shutdown system, written under qtcreator, is familiar with the practice program of the QT signal and the channel transfer process and runs smoothly on the PC. Label adds the.Png picture and changes the icon icon. Information read in lineEdit, call execution of windows kernel command and related shutdown configuration)