初级问题，一个类继承QWidget，编译出错

Question

2. #include <QtGui/QtGui>
4. class myclass : public QWidget
5. {
6.         Q_OBJECT
7. };
9. int main(int argc, char **argv)
10. {
11.         QApplication app(argc, argv);
13.         myclass myc;
15.         myc.show();
17.         return app.exec();
18. }

复制代码
编译出错
_make
g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Trolltech/Qt-4.4.3/mkspecs/linux-g++ -I. -I/usr/local/Trolltech/Qt-4.4.3/include/QtCore -I/usr/local/Trolltech/Qt-4.4.3/include/QtCore -I/usr/local/Trolltech/Qt-4.4.3/include/QtGui -I/usr/local/Trolltech/Qt-4.4.3/include/QtGui -I/usr/local/Trolltech/Qt-4.4.3/include -I. -I. -I. -o tmp.o tmp.cpp
g++ -Wl,-rpath,/usr/local/Trolltech/Qt-4.4.3/lib -o tmp tmp.o    -L/usr/local/Trolltech/Qt-4.4.3/lib -lQtGui -L/usr/local/Trolltech/Qt-4.4.3/lib -L/usr/X11R6/lib -pthread -lpng -lSM -lICE -pthread -pthread -lXi -lXrender -lXrandr -lfreetype -lfontconfig -lXext -lX11 -lQtCore -lz -lm -pthread -lgthread-2.0 -lrt -lglib-2.0 -ldl -lpthread
tmp.o: In function `main':
tmp.cpp.text+0x5e): undefined reference to `vtable for myclass'
tmp.cpp.text+0x65): undefined reference to `vtable for myclass'
tmp.cpp.text+0x76): undefined reference to `vtable for myclass'
tmp.cpp.text+0x82): undefined reference to `vtable for myclass'
tmp.cpp.text+0x8b): undefined reference to `vtable for myclass'
tmp.o:tmp.cpp.text+0xc9): more undefined references to `vtable for myclass' follow
collect2: ld returned 1 exit status
make: *** [tmp] Error 1

Answer 1

怎么解决的？

貌似是要moc，所以分开头文件和cpp文件的编写才行，是这样吗？

Answer 2

已经解决了