错误LNK2019未解析的外部符号

error LNK2019 unresolved external symbol

本文关键字：外部 符号 LNK2019 错误      更新时间：2023-10-16

我对C++很陌生，所以我下载了一个示例C++程序。示例程序在编译时似乎遇到了以下错误：-

Error   22  error LNK2019: unresolved external symbol _acsEnumServerNames@12    referenced in function "protected: virtual int __thiscall COpenTsrv::OnInitDialog(void)" (?OnInitDialog@COpenTsrv@@MAEHXZ)  Opentsrv.obj

我把它追溯到引用的函数，但我不知道它有什么问题？

BOOL COpenTsrv::OnInitDialog() 
{
CDialog::OnInitDialog();
CenterWindow();

acsEnumServerNames(ST_CSTA, AddToList, (unsigned long) (CComboBox*)&m_TserverListControl);
UpdateData(FALSE);

以下是生成日志。显然还有其他错误，但我想从第一个错误开始。

1>Generating Code...
1>Compiling resources...
1>Compiling manifest to resources...
1>Linking...
1>Opentsrv.obj : error LNK2019: unresolved external symbol _acsEnumServerNames@12  referenced in function "protected: virtual int __thiscall COpenTsrv::OnInitDialog(void)" (? OnInitDialog@COpenTsrv@@MAEHXZ)
1>Opentsrv.obj : error LNK2019: unresolved external symbol _acsQueryAuthInfo@8 referenced in function "protected: void __thiscall COpenTsrv::OnSelchangeTserverlist(void)" (?OnSelchangeTserverlist@COpenTsrv@@IAEXXZ)
1>Opentsrv.obj : error LNK2019: unresolved external symbol _acsAbortStream@8 referenced in function "protected: virtual void __thiscall COpenTsrv::OnOK(void)" (?OnOK@COpenTsrv@@MAEXXZ)
1>Tsapi.obj : error LNK2001: unresolved external symbol _acsAbortStream@8
1>Opentsrv.obj : error LNK2019: unresolved external symbol _acsEventNotify@16 referenced in function "protected: virtual void __thiscall COpenTsrv::OnOK(void)" (?OnOK@COpenTsrv@@MAEXXZ)
1>Opentsrv.obj : error LNK2019: unresolved external symbol _acsOpenStream@60 referenced in function "protected: virtual void __thiscall COpenTsrv::OnOK(void)" (?OnOK@COpenTsrv@@MAEXXZ)
1>Opentsrv.obj : error LNK2019: unresolved external symbol _cstaMonitorDevice@20 referenced in function "protected: long __thiscall COpenTsrv::OnTsapiAcsConfirmation(unsigned int,long)" (?OnTsapiAcsConfirmation@COpenTsrv@@IAEJIJ@Z)
1>Sampldlg.obj : error LNK2019: unresolved external symbol _cstaMakeCall@20 referenced in function "protected: void __thiscall CSampleDlg::OnCall(void)" (?OnCall@CSampleDlg@@IAEXXZ)
1>Sampldlg.obj : error LNK2019: unresolved external symbol _cstaClearConnection@16 referenced in function "protected: void __thiscall CSampleDlg::OnHangup(void)" (?OnHangup@CSampleDlg@@IAEXXZ)
1>Sampldlg.obj : error LNK2019: unresolved external symbol _cstaAnswerCall@16 referenced in function "protected: void __thiscall CSampleDlg::OnAnswer(void)" (?OnAnswer@CSampleDlg@@IAEXXZ)
1>Tsapi.obj : error LNK2019: unresolved external symbol _acsGetEventPoll@20 referenced in function "protected: long __thiscall CTsapiWnd::OnTsapiMsg(unsigned int,long)" (?OnTsapiMsg@CTsapiWnd@@IAEJIJ@Z)
1>C:UserssteventangDocumentsVisual Studio 2005ProjectsTSAPINEWDebugTSAPINEW.exe    : fatal error LNK1120: 10 unresolved externals
1>Build log was saved at "file://c:UserssteventangDocumentsVisual Studio 2005ProjectsTSAPINEWTSAPINEWDebugBuildLog.htm"
1>TSAPINEW - 12 error(s), 21 warning(s)
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========

如果能为我指明正确的方向，我们将不胜感激。

感谢

看来您的编译是成功的。只有链接不起作用。

链接器可能会抱怨，因为您定义了方法"acsEnumServerNames"的标头，但没有提供该方法的实现。

也许您使用了头文件，但没有提供头所属的库？

找出"acsEnumServerNames"属于哪个包，并检查您是否在某个.c/.cpp文件中有该方法的实现，或者该实现是否应由您所依赖的某个库提供。

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