main.o: In function `ClientSocket::ClientSocket(QObject*)':
main.cpp:(.text+0x3b): undefined reference to `vtable for ClientSocket'
main.o: In function `ClientSocket::ClientSocket(QObject*)':
main.cpp:(.text+0x13b): undefined reference to `vtable for ClientSocket'
main.o: In function `TripServer::TripServer(QWidget*)':
main.cpp:(.text+0x1d6): undefined reference to `vtable for TripServer'
main.o: In function `main':
main.cpp:(.text+0x3d5): undefined reference to `vtable for TripServer'
main.cpp:(.text+0x44f): undefined reference to `vtable for TripServer'
main.o: In function `TripServer::TripServer(QWidget*)':
main.cpp:(.text+0x4e6): undefined reference to `vtable for TripServer'
collect2: ld returned 1 exit status
谁可以给我讲讲,我是那里错了......谢谢~~~