在PC上的乌班图执行自己写的QT程序 出现这样的提示：QWidget: Must construct a QApplication before a QWidget
但是我明明在main.cpp中创建了QApplication对象啊
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
然后我debugger[img]file:///D:\我的文档\Tencent Files\1456025401\Image\C2C\473$K[5MZZE$TEHK3~)$)1S.png[/img][img=0,1]file:///D:\我的文档\Tencent Files\1456025401\Image\C2C\473$K[5MZZE$TEHK3~)$)1S.png[/img]的是就出现这个：
&"warning: GDB: Failed to set controlling terminal: Inappropriate ioctl for device\n"
QWidget: Must construct a QApplication before a QWidget
