Qt5实现定时关机，设定关机时间，设定关机倒计时；QT+=coreguiQT+=widgetsgreaterThan(QT_MAJOR_VERSION,4):QT+=widgetsRC_ICONS+=shutdown.icoTARGET=ShutDownTEMPLATE=appSOURCES+=main.cpp\shutdown.cpp\systemtime.cpp\timethread.cpp\widgethide.cppHEADERS+=shutdown.h\systemtime.h\time