获取当前日期

 //获取当前日期
 char currentTime[20] = {0};
 SYSTEMTIME sys;
 GetLocalTime( &sys );
 sprintf(currentTime,"%4d-%02d-%02d %02d:%02d:%02d",
      sys.wYear,sys.wMonth,sys.wDay,
   sys.wHour,sys.wMinute,sys.wSecond);