server from sz

#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include"Client.h"
#include <iostream>
#include <windows.h>
#include <sstream>
#include<vector>
#include <string>
#include <time.h>
#include <iterator>
#pragma warning(disable:4996)
#pragma comment (lib, "ws2_32.lib")  //load ws2_32.dll
#define BUF_SIZE 100

using namespace std;
// create  receive  message thread
 vector< Client > clients;
DWORD WINAPI ClientThread (LPVOID ssAccept)
    {
        SOCKET sAccept  = (SOCKET)ssAccept;
        //cout<<sAccept<<endl;
        int RET =  0;
        char RecvBuffer[BUF_SIZE];
        while(true){
        memset(RecvBuffer, 0x00, BUF_SIZE);
        RET = recv(sAccept, RecvBuffer, BUF_SIZE, 0);
        if(RET == 0||RET == SOCKET_ERROR)
        {
            break;
        }
        cout<<"message is "<<RecvBuffer<<endl;
		int destnation = RecvBuffer[0];
        send(clients[destnation].getClientSOCKET(), RecvBuffer, strlen(RecvBuffer), 0);  //send data to client
    }
  // closesocket(sAccept);

    return 0;
}
int main(){
    printf("==========================================================\n");

    printf("|This program is wirten by Xuan Li, Zeyu Ni, Shuo Zhang  |\n");
    printf("|This program  using socket lib and tcp/ip portocol      |\n");
    printf("==========================================================\n");
    WSADATA wsaData;
    HANDLE WINAPI  thread[255];    //thread
    DWORD WINAPI dwThId[255];    // thread id number
    int index=0;
        if(WSAStartup(MAKEWORD(2,2),&wsaData)!=0)
        {
            printf("Winsock load failed\n");
            return 0;
        }
        //create socket
        SOCKET        servSock,sAccept;

        servSock = socket(AF_INET, SOCK_STREAM, 0);
        if(servSock==INVALID_SOCKET)
        {
		printf("socket failed:%d\n",WSAGetLastError());
		return 0;
        }
    //bind socket
    sockaddr_in sockAddr;
    memset(&sockAddr, 0, sizeof(sockAddr));
    sockAddr.sin_family = AF_INET;  //using ipv4 adress
    sockAddr.sin_addr.s_addr =INADDR_ANY;// local
    sockAddr.sin_port = htons(5000);  //set the port
    if( bind(servSock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR))==SOCKET_ERROR)
	{
		printf("bind()failed:%d\n",WSAGetLastError());
		return 0;
	}
    //begin listening
   if(listen(servSock,20)==SOCKET_ERROR)
	{
		printf("listen()failed:%d\n",WSAGetLastError());
		return 0;
	}//listen and judge weather it can work
    //revieve the request from client
     //4,waiting and accept client connect request...
    sockaddr_in clntAddr;
    int nSize = sizeof(clntAddr);
    char client_ip[20];
     unsigned client_port=0;
    char buffer[BUF_SIZE] = {0};  //create buffer area
     cout<<"the server has running"<<endl;

     cout<<"server is  listening at port 5000"<<endl;
	 int id = 0;
    while(1){
       sAccept = accept(servSock, (SOCKADDR*)&clntAddr, &nSize);

       if(sAccept==INVALID_SOCKET)
		{
			printf("accept()failed:%d\n",WSAGetLastError());
			break;
		}
       Client c;
        srand( (unsigned int)time(0) );
	int recvname;
	char usename[20];
	memset(usename, 0x00, 20);
	recvname = recv(sAccept, usename, 20, 0);         //receive  username from client
       c.setClientSOCKET(sAccept);
       c.setId(id);
	   id++;                  //the first client has id 1 and second has id 2 and keep on
       c.setUserName(usename);    
       clients.push_back(c);
        cout << clients.size()<<endl;
	int j = 0;
	for (auto i = clients.begin(); i != clients.end(); i++)
	{
		stringstream sstr;
		sstr.clear();
		char * idname = new char[20];
		string aaaa;
		aaaa+=clients[j].getId();
		aaaa+= ' ';
		aaaa+=clients[j].getUsername();                     //make a string contain id+username and send back to user
		sstr << aaaa;//将s的值放到stringstream                  
		sstr >> idname;//将stringstream中的值导出到ch
		send(sAccept, idname, strlen(idname), 0);          //to show all clients in the system for user to choose to whom to send
		j++;
		}
        //    clinets[clinetNumber] = sAccept;
     //  clinetNumber++;
		//get client ip and port
        client_port = ntohs(sockAddr.sin_port);
        //cout<<"client "<<client_ip<<":"<<client_port<<endl;   // some wrong in this code
		printf("accepted client IP:[%s],port:[%d]\n",inet_ntoa(clntAddr.sin_addr),ntohs(sockAddr.sin_port));
		 HANDLE WINAPI  hThread  = CreateThread(NULL,0,ClientThread,(LPVOID)sAccept,0,NULL);
		     if(hThread == NULL)
            {
           cout<<"creat thread failed"<<endl;
           break;
            }
             Sleep(1000);
       CloseHandle(hThread);
      //  int strLen = recv(sAccept, buffer, BUF_SIZE, 0);  //
      //  printf("Message form client: %s\n", buffer);
      //  printf("Input a string: ");
       // gets(buffer);
        //send(sAccept, buffer, strlen(buffer), 0);  //send data to client


//close socket
        memset(buffer, 0, BUF_SIZE);  //reset buffer area

    }
//close socket
  closesocket(sAccept);
    closesocket(servSock);
 //stop using dll
    WSACleanup();

    return 0;
}