c++中一个奇怪的错误

icoming

LocalFileList.o(.text+0x1a): In function `CLocalFileList::CLocalFileList[not-in-charge](char*)':
/usr/include/sys/stat.h:367: undefined reference to `vtable for CLocalFileList'
LocalFileList.o(.text+0x26):/usr/include/sys/stat.h:367: undefined reference to `vtable for CLocalFileList'
LocalFileList.o(.text+0x32): In function `CLocalFileList::CLocalFileList[not-in-charge](char*)':
/usr/include/c++/3.3.2/bits/basic_string.h:891: undefined reference to `vtable for CLocalFileList'
LocalFileList.o(.text+0x258): In function `CLocalFileList::CLocalFileList[in-charge](char*)':
/home/zd/Projects/ftp/src/LocalFileList.cc:7: undefined reference to `vtable for CLocalFileList'
LocalFileList.o(.text+0x264):/home/zd/Projects/ftp/src/LocalFileList.cc:7: undefined reference to `vtable for CLocalFileList'
LocalFileList.o(.text+0x270):/home/zd/Projects/ftp/src/LocalFileList.cc:7: more undefined references to `vtable for CLocalFileList' follow
collect2: ld returned 1 exit status
make: *** [ftp] Error 1

What does the message mean?
I have define CLocalFileList::CLocalFileList(char*).

CLocalFileList的父类是CFileList.
这些类之间的继承关系如下:
CLocalFileList->CFileList->CCombo->CWidget
                                   ->CButton->CWidget
                                   ->CCtrlList->CWidget

batigolsg

跟我类似的错误啊，有那位大虾能帮忙指点啊，不胜感谢！

lanche

“using namespace std；”了没有？

x11

用gcc编译的？