C++基于socket多线程怎么实现网络聊天室

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1. 实现图解

2. 聊天室服务端：TCP_Server_Chat.cpp

#include  // winsock2的头文件#include #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;}

启动聊天室服务端：

3. 聊天室客户端：TCP_Client_Chat.cpp

#include//winsock2的头文件#includeusing  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;}

启动2个客户端

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