C++这是什么原因啊。。编译能过，组建却过不了！

Question

--------------------Configuration: ClientSocket - Win32 Debug--------------------
Linking...
ClientSocket.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall CMessg::~CMessg(void)" (??1CMessg@@UAE@XZ)
ClientSocket.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall CMessg::Serialize(class CArchive &)" (?Serialize@CMessg@@UAEXAAVCArchive@@@Z)
ClientSocket.obj : error LNK2001: unresolved external symbol "public: __thiscall CMessg::CMessg(void)" (??0CMessg@@QAE@XZ)
ClientSocket.obj : error LNK2001: unresolved external symbol "public: void __thiscall CExample2_ChatRoomDlg::CloseSessionSocket(void)" (?CloseSessionSocket@CExample2_ChatRoomDlg@@QAEXXZ)
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __endthreadex
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __beginthreadex
libcd.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/ClientSocket.exe : fatal error LNK1120: 7 unresolved externals
执行 link.exe 时出错.ClientSocket.exe - 1 error(s), 0 warning(s)

Answer 1

没有链接到外部库。查看是不是有LIB文件没有添加。#pragma comment(lib,"ext_lib")