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This article Xiaobian for everyone to introduce in detail "C++ based socket UDP network programming how to achieve chat room function", detailed content, clear steps, details properly handled, I hope this article "C++ based socket UDP network programming how to achieve chat room function" article can help you solve doubts, the following with Xiaobian's ideas slowly in-depth, together to learn new knowledge bar.

0. Flow chart of communication steps

(Left: Server; Right: Client)

1. server code

1.1 Server class header file (CServer_UDP.h)

#pragma once #include class CServer_UDP{public: CServer_UDP(); void SendMsg(const char sendBuf[]); void RecMsg(); ~CServer_UDP(); private: SOCKET m_sServer; struct sockaddr_in m_SocAddrClient; //Used to save client information bool m_terminal;} when establishing a connection;

1.2 Server class source file (CServer_UDP.cpp)

#define _WINSOCK_DEPRECATED_NO_WARNINGS#include "CServer_UDP.h" #include #pragma comment(lib, "ws2_32.lib") CServer_UDP::CServer_UDP():m_terminal(false){ //must be initialized as follows, otherwise socket() returns 10093 error//initialize WSA WORD sockVersion = MAKEWORD(2, 2); WSADATA wsaData; if (WSAStartup(sockVersion, &wsaData) != 0)//initialize ws2_32.dll { std::cout} via a process

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