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C++ linking error help

Started by DimSum Oct 8, 2002 at 2:36 PM 4 replies 950+ views

Original Post

Oct 8, 2002 at 2:36 PM

Hi all, I've been stumped on this C++ linking error for the last hour. I have a class that inherits CSocket: class CServerSocket : public CSocket { //constructor public: CServerSocket(); ... } And then I'm declare an instance of this class in a header file (File.h): CServerSocket* pSocket; And then I try to create a new instance of this variable in the corresponding File.cpp: pSocket = new CServerSocket (); When I build this I keep getting a linking error: error LNK2019: unresolved external symbol "public: __thiscall CServerSocket::CServerSocket(void)" (??0CServerSocket@@QAE@XZ) referenced in function "public: void __thiscall CMetricServerDlg::OnBnClickedStart(void)" (?OnBnClickedStart@CMetricServerDlg@@QAEXXZ) MetricServer fatal error LNK1120: 1 unresolved externals Can anyone tell me how to fix this?? I'm stumped... [edited by - DimSum on October 8, 2002 3:42:23 PM]

twanvl

Oct 8, 2002 at 2:43 PM

You have to impelement the constructor of CServerSocket, either inline (instead of the semicolon) or outside the class:

  
CServerSocket::CServerSocket()
{
    // your code here (if any)

}

DimSum

Author

DimSum

Oct 8, 2002 at 2:47 PM

I have a contructor definition like the following. And its being defined in the corresponding class file.

CServerSocket::CServerSocket()
{
// Does nothing at the moment
}

But i''m still getting the errors. Is my constructor faulty here???

Qw3r7yU10p!

Oct 8, 2002 at 3:01 PM

is the cpp file with the implementation included in your project (if you''re using vc++), or named in your make file (if you''re not)

DimSum

Author

DimSum

Oct 8, 2002 at 3:07 PM

AAAAHHHHH!!!!
Thanks man!!
that was it!!... forgot to include it in my project. ugh

thanks again

-Phil

Qw3r7yU10p!

Oct 8, 2002 at 3:11 PM

experience is the best teacher

glad to be able to help (c:

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