How to make a full-duplex c++ winsock chat program - c++

Question

I'm trying to make a simple client-server chat program in C++. I wrote this, but my problem is that I can just send data from the server to the client. I want to have a full-duplex communication, and send data from client to server too.
Here is my code.
server :
#include "stdafx.h"
#include <WinSock2.h>
#include <winsock.h>
#include <stdio.h>
#include <iostream>
#include <string>
#define RCVBUFSIZE 32
using namespace std;
#pragma comment(lib, "Ws2_32.lib")
int main()
{
WSADATA wsadat;
SOCKET welcome_socket = INVALID_SOCKET;
string IpAddress;
int PortNom;
SOCKADDR_IN SockAddress;
//-----------------------------------------------
if (WSAStartup(MAKEWORD(2,2),&wsadat) !=NO_ERROR)
{
cout << "WSA intialization failed. \n";
WSACleanup();
return 1;
}
//------------------------------------------------
welcome_socket = socket(AF_INET , SOCK_STREAM , 0);
//--------------------------------------------------
cout << "Enter your ip address: ";
cin >> IpAddress;
cout << "Enter your port nomber:";
cin >> PortNom;
//---------------------------------------------------
SockAddress.sin_addr.s_addr = inet_addr (IpAddress.c_str());
SockAddress.sin_port = htons(PortNom);
SockAddress.sin_family = AF_INET;
//---------------------------------------------------
bind(welcome_socket,(SOCKADDR *)&SockAddress,sizeof(SockAddress));
listen(welcome_socket,1);
//----------------------------------------------------
SOCKET Comm_sock;
SOCKADDR_IN ClientAddr;
int AddressLen = sizeof (ClientAddr);
char *buffer = new char[13];
int turn= 0;
char* buf = new char[50];
char temp;
while (true)
{
Comm_sock = accept(welcome_socket,(SOCKADDR *)&ClientAddr , &AddressLen);
while (buf != "exit")
{
if (turn == 0)
{
cout << endl;
recv(Comm_sock,buf,50,0);
if(buf[0]=='e' && buf[1]=='x' && buf[2]=='i' && buf[3]=='t')
return 0;
cout << "MsG from client :"<< buf << endl;
cin.get(temp);
turn = 1;
}
if (turn == 1)
{
cout << "Enter MsG:";
cin.get(buf,50);
if (buf[0]=='e' && buf[1]=='x' && buf[2]=='i' && buf[3]=='t')
return 0;
send(Comm_sock,buf,strlen(buf)+1,0);
cin.get(temp);
turn=0;
}
}
}
and client:
#include "stdafx.h"
#include <winsock2.h>
#include <Ws2tcpip.h>
#include <stdio.h>
#include <iostream>
using namespace std;
// Link with ws2_32.lib
#pragma comment(lib, "Ws2_32.lib")
#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT "12345"
//-------------------------------------
int main ()
{
WSADATA wsadata;
int iResult;
SOCKET ConnectSocket = INVALID_SOCKET;
struct sockaddr_in clientservice;
char *sendbuf ="";
char recvbuf[DEFAULT_BUFLEN];
char sendbuffer[512];
int recvbuflen = DEFAULT_BUFLEN;
int sendbuflen = 512;
//----------------------------------
iResult = WSAStartup(MAKEWORD(2,2),&wsadata);
//----------------------------------
ConnectSocket = socket(AF_INET,SOCK_STREAM , IPPROTO_TCP);
//-----------------------------------
clientservice.sin_family = AF_INET;
clientservice.sin_addr.s_addr = inet_addr( "127.0.0.1" );
clientservice.sin_port = htons( 11111 );
//-----------------------------------
iResult = connect (ConnectSocket,(SOCKADDR *)&clientservice ,sizeof(clientservice));
iResult = send( ConnectSocket, sendbuf, (int)strlen(sendbuf), 0 );
cout << "bytes Sent:" << iResult << "\n";
//-------------------------------------
iResult = shutdown(ConnectSocket ,SD_SEND);
if (iResult == SOCKET_ERROR)
{
printf("shutdown failed: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
do {
string reciev;
iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0);
recvbuf[iResult]= 0 ;
cout << recvbuf << endl;
} while(true);
//------------------------------------------
closesocket(ConnectSocket);
WSACleanup();
}