Errors in socket program

[zorde]

Hi I'm new to C++ and trying to create a simple socket server but I keep getting 3 errors which I don't understand. Below is the code, please help:

#include "ServerSocket.h"
#include "SocketException.h"
#include <iostream.h>
#include <string>
 
int main ( int argc, int argv[] )
{
 
  try
    {
      // Create the socket
      ServerSocket server ( 30000 );
 
      while ( true )
    {
 
      ServerSocket new_sock;
      server.accept ( new_sock );
 
      try
        {
          while ( true )
        {
          std::string data;
          new_sock >> data;
          new_sock << data;
        }
        }
      catch ( SocketException& ) {}
 
    }
    }
  catch ( SocketException& e )
    {
      std::cout << "Exception was caught:" << e.description() << "\nExiting.\n";
    }
 
  return 0;
}
 

Here's the error they keep showing:

c:\documents and settings\studentivtl\my documents\cpp1.cpp(8) : error C2039: 'cout' : is not a member of 'std'
c:\documents and settings\studentivtl\my documents\cpp1.cpp(36) : error C2039: 'cout' : is not a member of 'std'
c:\documents and settings\studentivtl\my documents\cpp1.cpp(36) : error C2679: binary '<<' : no operator defined which takes a right-hand operand of type 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' (or t
here is no acceptable conversion)
Error executing cl.exe.

[gpraghuram]

Hi I'm new to C++ and trying to create a simple socket server but I keep getting 3 errors which I don't understand. Below is the code, please help:

#include "ServerSocket.h"
#include "SocketException.h"
#include <iostream.h>
#include <string>

int main ( int argc, int argv[] )
{

try
{
// Create the socket
ServerSocket server ( 30000 );

while ( true )
{

ServerSocket new_sock;
server.accept ( new_sock );

try
{
while ( true )
{
std::string data;
new_sock >> data;
new_sock << data;
}
}
catch ( SocketException& ) {}

}
}
catch ( SocketException& e )
{
std::cout << "Exception was caught:" << e.description() << "\nExiting.\n";
}

return 0;
}

Here's the error they keep showing:

c:\documents and settings\studentivtl\my documents\cpp1.cpp(8) : error C2039: 'cout' : is not a member of 'std'
c:\documents and settings\studentivtl\my documents\cpp1.cpp(36) : error C2039: 'cout' : is not a member of 'std'
c:\documents and settings\studentivtl\my documents\cpp1.cpp(36) : error C2679: binary '<<' : no operator defined which takes a right-hand operand of type 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' (or t
here is no acceptable conversion)
Error executing cl.exe.

Change the #include<iostream.h> to
#include<iostream>.
I think that will solve the error.

Raghuram

[zorde]

Change the #include<iostream.h> to
#include<iostream>.
I think that will solve the error.

Raghuram

I have tried to change it to #include <iostream> and this is the error they come up with

Cpp1.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall ServerSocket::~ServerSocket(void)" (??1ServerSocket@@UAE@XZ)
Cpp1.obj : error LNK2001: unresolved external symbol "public: class ServerSocket const & __thiscall ServerSocket::operator<<(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)const " (??6ServerSocket@@QB
EABV0@ABV?$basic_string@DU?$char_traits@D@std@@V?$ allocator@D@2@@std@@@Z)
Cpp1.obj : error LNK2001: unresolved external symbol "public: class ServerSocket const & __thiscall ServerSocket::operator>>(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &)const " (??5ServerSocket@@QBEABV0@
AAV?$basic_string@DU?$char_traits@D@std@@V?$alloca tor@D@2@@std@@@Z)
Cpp1.obj : error LNK2001: unresolved external symbol "public: void __thiscall ServerSocket::accept(class ServerSocket &)" (?accept@ServerSocket@@QAEXAAV1@@Z)
Cpp1.obj : error LNK2001: unresolved external symbol "public: __thiscall ServerSocket::ServerSocket(int)" (??0ServerSocket@@QAE@H@Z)
Cpp1.obj : error LNK2001: unresolved external symbol "protected: __thiscall Socket::Socket(void)" (??0Socket@@IAE@XZ)
Debug/Cpp1.exe : fatal error LNK1120: 6 unresolved externals

[sicarie]

It's also considered good practice to add the namespace line afterwards:

#include "ServerSocket.h"
#include "SocketException.h"
#include <iostream.h>
#include <string>
using namespace std;
 

[zorde]

It's also considered good practice to add the namespace line afterwards:

#include "ServerSocket.h"
#include "SocketException.h"
#include <iostream.h>
#include <string>
using namespace std;
 

Hi I've tried to add the "using namespace std;" command too but still having the same errors. Am I missing some files?? Because I'm currently using Visual C++ 6.0 to run it.

[sicarie]

Hi I've tried to add the "using namespace std;" command too but still having the same errors. Am I missing some files?? Because I'm currently using Visual C++ 6.0 to run it.

My apologies, I did not mean to imply that it was the cause of your errors, it is just good practice. I believe there are other errors in your code, but I don't have my compiler available, so I will not be able to llok at it right now.

[RRick]

Changing iostream.h to iostream fixed you cout problem and your code compiled. Now the compiler is trying to link all the pieces together to make a program, and it can't find the compiled code for ServerSocket.

You need to include the library that contains these modules or if its your own code, you need to add ServerSocket.o for the linking.

[zorde]

Changing iostream.h to iostream fixed you cout problem and your code compiled. Now the compiler is trying to link all the pieces together to make a program, and it can't find the compiled code for ServerSocket.

You need to include the library that contains these modules or if its your own code, you need to add ServerSocket.o for the linking.

Thanks, I've included the necessary library for the program. But another problem come out, the compiler can't find #include <sys/socket.h>. Do you know where I can find and download this??

[RRick]

sys/socket.h is pretty basic and part of most installations. On linux boxes, the sys directory is located under /usr. I would take a look there before loading socket code. You can also use the find command to see if socket.h is located somewhere else.

If your system is really missing the socket code, go to the manufacturer's web site and see if you can get something already compiled for your system. For linux, there are installation programs (rpm, yum) that will take most of the drudgery out of this task.