C++ 实现即时通信的示例代码(直接运行)

//TcpServer_plus.exe #include #include  #include #pragma comment(lib,"ws2_32.lib") #include using namespace std; #include SOCKADDR_IN cAddr = { 0 }; int len = sizeof cAddr; SOCKET clientSocket[1001];//同时最多容纳1000人在线 void chat(int n) { char buff[1024]; int r; while (1) { r = recv(clientSocket[n], buff, 1023, NULL); if (r > 0) { buff[r] = 0; //cout << inet_ntoa(cAddr.sin_addr) << "发来的消息: " << buff; printf("%s发来的信息：%s\n", inet_ntop(AF_INET, (void*)&cAddr.sin_addr, buff, 1023), buff); } } } int main() { //1.确定协议版本 WSADATA wsadata; WSAStartup(MAKEWORD(2, 2), &wsadata);//2.2版本 if (LOBYTE(wsadata.wVersion) != 2 || HIBYTE(wsadata.wVersion) != 2) { cout << "确认版本失败!\n" << endl; return -1; } cout << "确认版本成功!" << endl; //2.创建Socket SOCKET serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);//参数：协议类型、通信载体（字节流）、ip保护方式 if (serverSocket == SOCKET_ERROR) { cout << "创建socket失败!" << GetLastError() << endl; //9.清楚版本信息 WSACleanup(); return -1; } cout << "socket创建成功！" << endl; //3.创建服务器协议地址族 //就是一个结构体 SOCKADDR_IN addr = { 0 }; addr.sin_family = AF_INET; inet_pton(AF_INET, "192.168.31.100", (void*)&addr.sin_addr.S_un.S_addr); //addr.sin_addr.S_un.S_addr = inet_addr("192.168.31.100");//局域网地址 addr.sin_port = htons(9999);//设置端口号 小端转大端 //4.绑定 int r = bind(serverSocket, (struct sockaddr*)&addr, sizeof addr); if (r == -1) { cout << "绑定失败!" << GetLastError() << endl; //8.关闭socket closesocket(serverSocket); //9.清除版本信息 WSACleanup(); return -1; } cout << "绑定成功！" << endl; //5.监听 r = listen(serverSocket, 10); if (r == -1) { cout << "监听失败!" << GetLastError() << endl; //8.关闭socket closesocket(serverSocket); //9.清除版本信息 WSACleanup(); return -1; } cout << "监听成功！" << endl; //6.等待客户端连接（多客户端连接） for (int i = 0; i <1001; i++) { clientSocket[i] = accept(serverSocket, (sockaddr*)&cAddr, &len);//获取客户端的socket if (clientSocket[i] == SOCKET_ERROR) { cout << "客户端连接失败：" << GetLastError() << endl; //关闭socket closesocket(serverSocket); //9.清楚版本信息 WSACleanup(); return -1; } cout << "客户端连接成功！" << endl; //7 通信  多线程实现 chat函数实现 CreateThread(NULL, NULL, (LPTHREAD_START_ROUTINE)chat, (LPVOID)i, NULL, NULL);//多线程实现 } //8.关闭socket closesocket(serverSocket); //9.清理协议版本信息 WSACleanup(); while (1);//停顿 return 0; } 

//TcpClient.exe #include #include  #include #pragma comment(lib,"ws2_32.lib") #include using namespace std; #include int main() { //1.确定协议版本 WSADATA wsadata; WSAStartup(MAKEWORD(2, 2), &wsadata);//2.2版本 if (LOBYTE(wsadata.wVersion) != 2 || HIBYTE(wsadata.wVersion) != 2) { cout << "确认版本失败!\n" << endl; return -1; } cout << "确认版本成功!" << endl; //2.创建Socket SOCKET clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);//参数：协议类型、通信载体（字节流）、ip保护方式 if (clientSocket == SOCKET_ERROR) { cout << "创建socket失败!" << GetLastError() << endl; //9.清楚版本信息 WSACleanup(); return -1; } cout << "socket创建成功！" << endl; //3.获取服务器协议地址族 //就是一个结构体 SOCKADDR_IN addr = { 0 }; addr.sin_family = AF_INET; inet_pton(AF_INET, "192.168.31.100", (void*)&addr.sin_addr.S_un.S_addr); //addr.sin_addr.S_un.S_addr = inet_addr("192.168.31.100");//局域网地址 addr.sin_port = htons(9999);//设置端口号 小端转大端 //4.连接服务器 int r = connect(clientSocket, (sockaddr*)&addr,sizeof addr); if (r == -1) { cout << "连接服务器失败：" << GetLastError() << endl; //6.关闭socket closesocket(clientSocket); //7 清理版本信息 WSACleanup(); return -1; } cout << "服务器连接成功!" << endl; //5.通信 char buff[1024]; while (1) { cin >> buff;//用户输入信息 send(clientSocket, buff, strlen(buff), NULL);//发送信息 } //6.关闭socket closesocket(clientSocket); //7.清理协议版本信息 WSACleanup(); while (1);//停顿 return 0; }