C++基于socket多线程实现网络聊天室

#include <winsock2.h> // winsock2的头文件
#include <iostream>
#pragma comment(lib, "ws2_32.lib")
using namespace std;

// stdcall的线程处理函数
DWORD WINAPI ThreadFun(LPVOID lpThreadParameter);

int main()
{
 WSADATA wd;
 if(WSAStartup(MAKEWORD(2,2), &wd) != 0)
 {
  cout << "WSAStartup Error:" << WSAGetLastError() << endl;
  return 0;
 }

 // 1. 创建流式套接字
 SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 if(s == INVALID_SOCKET)
 {
  cout << "socket error:" << WSAGetLastError() << endl;
  return 0;
 }

 // 2. 绑定端口和ip
 sockaddr_in addr;
 memset(&addr, 0, sizeof(sockaddr_in));
 addr.sin_family = AF_INET;
 addr.sin_port = htons(8000);
 addr.sin_addr.s_addr = inet_addr("127.0.0.1");

 int len = sizeof(sockaddr_in);
 if(bind(s, (SOCKADDR*)&addr, len) == SOCKET_ERROR)
 {
  cout << "bind Error:" << WSAGetLastError() << endl;
  return 0;
 }

 // 3. 监听
 listen(s,5);

 // 主线程循环接收客户端的连接
 while(true)
 {
  sockaddr_in addrClient;
  len = sizeof(sockaddr_in);
  // 4.接受成功返回与client通讯的Socket
  SOCKET c = accept(s, (SOCKADDR*)&addrClient, &len);
  if(c != INVALID_SOCKET)
  {
   // 创建线程，并且传入与client通讯的套接字
   HANDLE hThread = CreateThread(NULL, 0, ThreadFun, (LPVOID)c, 0, NULL);
   CloseHandle(hThread); // 关闭对线程的引用
  }

 }

 // 6.关闭监听套接字
 closesocket(s);
 
 // 清理winsock2的环境
 WSACleanup();

 return 0;
}

DWORD WINAPI ThreadFun(LPVOID lpThreadParameter)
{
 // 5.与客户端通讯，发送或者接受数据
 SOCKET c= (SOCKET)lpThreadParameter;

 cout << "欢迎" << c << "进入聊天室！" << endl;

 // 发送数据
 char buf[100] = {0};
 sprintf(buf,"欢迎 %d 进入聊天室！",c);
 send(c,buf, 100, 0);

 // 循环接收客户端数据
 int ret=0;
 do 
 {
  char buf2[100] = {0};
  ret = recv(c, buf2, 100, 0);

  cout << c << " 说：" << buf2 << endl;

 } while (ret!=SOCKET_ERROR && ret!=0);

 cout << c << "离开了聊天室！";

 return 0;
}

#include<winsock2.h>//winsock2的头文件
#include<iostream>
using  namespace std;

//勿忘，链接dll的lib
#pragma comment(lib, "ws2_32.lib")

int  main()
{

 //加载winsock2的环境
 WSADATA  wd;
 if (WSAStartup(MAKEWORD(2, 2), &wd) != 0)
 {
  cout << "WSAStartup  error：" << GetLastError() << endl;
  return 0;
 }

 //1.创建流式套接字
 SOCKET  s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 if (s == INVALID_SOCKET)
 {
  cout << "socket  error：" << GetLastError() << endl;
  return 0;
 }

 //2.链接服务器
 sockaddr_in   addr;
 addr.sin_family = AF_INET;
 addr.sin_port = htons(8000);
 addr.sin_addr.s_addr = inet_addr("127.0.0.1");

 int len = sizeof(sockaddr_in);
 if (connect(s, (SOCKADDR*)&addr, len) == SOCKET_ERROR)
 {
  cout << "connect  error：" << GetLastError() << endl;
  return 0;
 }

 //3接收服务端的消息
 char buf[100] = { 0 };
 recv(s, buf, 100, 0);
 cout <<  buf << endl;

 //3随时给服务端发消息
 int  ret = 0;
 do
 {
  char buf[100] = {0};
  cout << "请输入聊天内容:";
  cin >> buf; 
  ret = send(s, buf, 100, 0); 
 } while (ret != SOCKET_ERROR&& ret != 0);


 //4.关闭监听套接字
 closesocket(s);

 //清理winsock2的环境
 WSACleanup();


 return 0;
}