What is wrong with my code: WSAStartup errors...

Posted on 2004-10-04
Medium Priority
Last Modified: 2012-06-21
I included wsock32.lib into the settings->link->object
and when I compile the following: (partial code shown)

#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <winsock.h>

using namespace std;

void errexit(const char *, ...);
void UDPecho_cnls(const char *host, const char *service);

#define LINELEN            128
#define WSVERS            MAKEWORD(2, 0);

void main(int argc, char *argv[])

      char      *host = argv[1], *service = argv[2];
      WSADATA      wsadata;

      cout<<"Command line does not contain the        

                                correct "<<endl;
            cout<<" number of arguments."<<endl;

      if(WSAStartup(WSVERS, &wsadata))
            errexit("WSAStartup failed\n");

      UDPecho_cnls(host, service);

I get the following errors:
--------------------Configuration: Program 3 - Win32 Debug--------------------
Program 3.cpp
C:\CS423P3\Program 3.cpp(28) : error C2143: syntax error : missing ')' before ';'
C:\CS423P3\Program 3.cpp(28) : error C2660: 'WSAStartup' : function does not take 1 parameters
C:\CS423P3\Program 3.cpp(28) : error C2143: syntax error : missing ')' before ';'
C:\CS423P3\Program 3.cpp(28) : warning C4390: ';' : empty controlled statement found; is this the intent?
C:\CS423P3\Program 3.cpp(28) : error C2143: syntax error : missing ';' before ','
C:\CS423P3\Program 3.cpp(28) : error C2059: syntax error : ')'
C:\CS423P3\Program 3.cpp(28) : error C2059: syntax error : ')'
Error executing cl.exe.

Program 3.obj - 6 error(s), 1 warning(s)

All the errors relate to the
      if(WSAStartup(WSVERS, &wsadata))
            errexit("WSAStartup failed\n");
code.  What is wrong?  Am I leaving a library out?

Question by:bjw5d6
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LVL 19

Accepted Solution

mrwad99 earned 2000 total points
ID: 12216478
>> #define WSVERS          MAKEWORD(2, 0);


>>    if(WSAStartup(WSVERS, &wsadata))

expands to

if (WSAStartup(MAKEWORD(2, 0);, &wsadata))

Lose the ; from the preprocessor directive :)
LVL 19

Expert Comment

ID: 12216487
...You need to remember that #define'd symbols like this are replaced *exactly* as you define them.  So the problem in this case was simply you adding the unncecessary ; after your WSVERS definition.

Author Comment

ID: 12231769
OH!  Thanks so much!  I already turned my code in... I ended up changing the
#define to Word (or something like that) and then it worked.  I didn't know why it didn't work w/ #define, because I saw that my instructor used #define in his notes... I get it now! No ; !!!  Thanks for your help!
LVL 19

Expert Comment

ID: 12235068
Glad to help :)

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