Nobody/Anonymous - 2002-11-11

Hello,

I'm fairly new to C, but i'm eager to get into programming with sockets in it. I decided to download a source that creates a simple listening socket so i can get an idea of how it works.. but I haven't been able to compile it successfully.
I'm pretty sure i'm just doing something wrong.. but here it is:

Start dev-c++, File -> New -> Project. Select console application, select it as a C Project, then OK. Then pasted the following code into main.c and compiled.

#include <winsock.h>        // winsock.h always needs to be included
#include <stdio.h>

int main(int argc, char** argv) {
    WORD version = MAKEWORD(1,1);
    WSADATA wsaData;
    int nRet;
    WSAStartup(version, &wsaData);
    SOCKET listeningSocket;
    listeningSocket = socket(AF_INET,        // Go over TCP/IP
                 SOCK_STREAM,        // Socket type
                 IPPROTO_TCP);        // Protocol
    if (listeningSocket == INVALID_SOCKET) {
        printf("Error at socket()");
        WSACleanup();
        return 0;
    }
    SOCKADDR_IN saServer;
    saServer.sin_family = AF_INET;
    saServer.sin_addr.s_addr = INADDR_ANY;        // Since this is a server, any address will do
    saServer.sin_port = htons(8888);        // Convert int 8888 to a value for the port field
        nRet = bind(listeningSocket, (LPSOCKADDR)&saServer, sizeof(struct sockaddr));
    if (nRet == SOCKET_ERROR) {
        printf("Error at bind()");
        WSACleanup();
        return 0;
    }
    nRet = listen(listeningSocket, 10);        // 10 is the number of clients that can be queued
    if (nRet == SOCKET_ERROR) {
        printf("Error at listen()");
        WSACleanup();
        return 0;
    }
    SOCKET theClient;
    theClient = accept(listeningSocket,
               NULL,            // Address of a sockaddr structure (see below)
               NULL);            // Address of a variable containing the size of sockaddr
    if (theClient == INVALID_SOCKET) {
        printf("Error at accept()");
        WSACleanup();
        return 0;
    }
    closesocket(theClient);
    closesocket(listeningSocket);
    WSACleanup();
}

After attempting to compile it I get the following error messages:

C:\Dev-Cpp\Templates\main.c
[Warning] In function `main':
20 C:\Dev-Cpp\Templates\main.c
parse error before `listeningSocket'
22 C:\Dev-Cpp\Templates\main.c
`listeningSocket' undeclared (first use in this function)
(Each undeclared identifier is reported only once
for each function it appears in.)
35 C:\Dev-Cpp\Templates\main.c
parse error before `saServer'
37 C:\Dev-Cpp\Templates\main.c
`saServer' undeclared (first use in this function)
67 C:\Dev-Cpp\Templates\main.c
parse error before `theClient'
69 C:\Dev-Cpp\Templates\main.c
`theClient' undeclared (first use in this function)

Could someone enlighten me on what I am doing wrong? thanks.