error LNK1120 & LNK2001:

--------------------Configuration: ctl_one - Win32 Debug--------------------
Compiling...
ctl_one.c
Linking...
ctl_one.obj : error LNK2001: unresolved external symbol _ReportError
Debug/ctl_one.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

ctl_one.exe - 2 error(s), 0 warning(s)


===========

here's my code

Code:

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#include <windows.h>
#pragma comment(lib, "wsock32.lib")

#include <winsock.h>
#include <stdio.h>






#define NETWORK_ERROR -1
#define NETWORK_OK    0

void ReportError(int, const char *);


int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpCmd, int nShow) {
        WORD sockVersion;
        WSADATA wsaData;
        int nret;
        SOCKET listeningSocket;
        SOCKADDR_IN serverInfo;
        SOCKET theClient;

        sockVersion = MAKEWORD(1, 1);                        // We'd like Winsock version 1.1



        // We begin by initializing Winsock
        WSAStartup(sockVersion, &wsaData);


        // Next, create the listening socket


        listeningSocket = socket(AF_INET,                // Go over TCP/IP
                                SOCK_STREAM,          // This is a stream-oriented socket
                                IPPROTO_TCP);                // Use TCP rather than UDP

        if (listeningSocket == INVALID_SOCKET) {
                nret = WSAGetLastError();                // Get a more detailed error
                ReportError(nret, "socket()");                // Report the error with our custom function

                WSACleanup();                                // Shutdown Winsock
                return NETWORK_ERROR;                        // Return an error value
        }


        // Use a SOCKADDR_IN struct to fill in address information


        serverInfo.sin_family = AF_INET;
        serverInfo.sin_addr.s_addr = INADDR_ANY;        // Since this socket is listening for connections,
                                                        // any local address will do
        serverInfo.sin_port = htons(8888);                // Convert integer 8888 to network-byte order
                                                        // and insert into the port field


        // Bind the socket to our local server address
        nret = bind(listeningSocket, (LPSOCKADDR)&serverInfo, sizeof(struct sockaddr));

        if (nret == SOCKET_ERROR) {
                nret = WSAGetLastError();
                ReportError(nret, "bind()");

                WSACleanup();
                return NETWORK_ERROR;
        }


        // Make the socket listen
        nret = listen(listeningSocket, 10);                // Up to 10 connections may wait at any
                                                        // one time to be accept()'ed

        if (nret == SOCKET_ERROR) {
                nret = WSAGetLastError();
                ReportError(nret, "listen()");

                WSACleanup();
                return NETWORK_ERROR;
        }


        // Wait for a client




        while(1)
        {

        theClient = accept(listeningSocket,
                          NULL,                        // Address of a sockaddr structure (see explanation below)
                          NULL);                        // Address of a variable containing size of sockaddr struct

        if (theClient == INVALID_SOCKET) {
                nret = WSAGetLastError();
                ReportError(nret, "accept()");

                WSACleanup();
                return NETWORK_ERROR;
        }
        else if ("1" == "1")
        {}
        listeningSocket = theClient;
    break;
  }



        // Send and receive from the client, and finally,
        closesocket(theClient);
        closesocket(listeningSocket);


        // Shutdown Winsock
        WSACleanup();
        return NETWORK_OK;
}

---

anyone knows what's wrong?


using vc++6.0

You have the function prototype for the ReportError function but there is no code anywhere in the sample you provided for it. Solution... write some code for the ReportError function!

This is just a guess. I see your prototype for ReportError

Quote:

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void ReportError(int, const char *);

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but I do not see the actual function. Is it contained somewhere else? If you have cut and pasted the code from some other source or used code from a book, it is common for the developer/author to have listed this function in another file or chapter.


Just some thoughts.

DeadPoet