C++基于socket UDP网络编程怎么实现聊天室功能

本文小编为大家详细介绍"C++基于socket UDP网络编程怎么实现聊天室功能"，内容详细，步骤清晰，细节处理妥当，希望这篇"C++基于socket UDP网络编程怎么实现聊天室功能"文章能帮助大家解决疑惑，下面跟着小编的思路慢慢深入，一起来学习新知识吧。

0.通信步骤流程图

（左：服务器；右：客户端；）

1.服务器代码

1.1服务器类头文件(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;  //建立连接时，用于保存客户端信息 bool m_terminal;};

1.2服务器类源文件(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){ //必须进行如下初始化， 否则socket()会返回10093错误 //初始化WSA   WORD sockVersion = MAKEWORD(2, 2); WSADATA wsaData; if (WSAStartup(sockVersion, &wsaData) != 0) //通过一个进程初始化ws2_32.dll {  std::cout << "Initialize WSA failed" << std::endl;  return; } //初始化UDDP套接字 m_sServer = socket(AF_INET, SOCK_DGRAM, 0);  struct sockaddr_in m_SocAddrserver; m_SocAddrserver.sin_addr.S_un.S_addr = 0;//htonl(INADDR_ANY); m_SocAddrserver.sin_family = AF_INET; m_SocAddrserver.sin_port = htons(8090);  int ret = bind(m_sServer, (sockaddr*)&m_SocAddrserver, sizeof(m_SocAddrserver)); if (ret == -1) {  std::cout << "bind failed!" << std::endl;  WSACleanup(); } else {  //此处必须赋初值，不然会导致服务器端无法正常发送  int len_Client = sizeof(sockaddr);    char recBuf[1025];  int len = recvfrom(m_sServer, recBuf, 1024, 0, (sockaddr*)&m_SocAddrClient, &len_Client);  if (len > 0)  {   recBuf[len] = '\0';   std::cout << "Client say:" << recBuf << std::endl;  } }  }void CServer_UDP::SendMsg(const char sendBuf[]){ int ret = sendto(m_sServer, sendBuf, strlen(sendBuf), 0, (sockaddr*)&m_SocAddrClient, sizeof(m_SocAddrClient)); if (ret == -1) {  std::cout << "send failed" << std::endl;  std::cout << GetLastError()<< std::endl; }}void CServer_UDP::RecMsg(){ char recBuf[1025]; while (!m_terminal) {  //std::cout << "Begin rec...(server)" << std::endl;  int len = recvfrom(m_sServer, recBuf, 1024, 0, 0, 0);  if (len > 0)  {   recBuf[len] = '\0';   std::cout << "Client say:" << recBuf << std::endl;  } } }CServer_UDP::~CServer_UDP(){ closesocket(m_sServer); WSACleanup(); }

1.3服务器主函数

#include #include #include  #include "CServer_UDP.h" using namespace std; int main(){ CServer_UDP server_UDP;  thread recProc(&CServer_UDP::RecMsg, &server_UDP);  while (1) {  //cout << "Pleaes input content:" << endl;  string content;  cin >> content;  server_UDP.SendMsg(content.c_str()); }  recProc.join(); cout << "I love china!" << endl; system("pause"); return 0;}

2.客户端代码

2.1客户端类头文件(CClient.h)

#pragma once #include  class CClient{public: CClient(); void RecMsg(); void SendMsg(const char sendBuf[]); ~CClient();private: SOCKET m_sockClient; sockaddr_in m_TargetServer;};

2.2客户端类源文件(CClient.cpp)

#define _WINSOCK_DEPRECATED_NO_WARNINGS#include "CClient.h" #include  #pragma comment(lib, "ws2_32.lib") CClient::CClient(){ //必须进行如下初始化， 否则socket()会返回10093错误 //初始化WSA   WORD sockVersion = MAKEWORD(2, 2); WSADATA wsaData; if (WSAStartup(sockVersion, &wsaData) != 0) //通过一个进程初始化ws2_32.dll {  std::cout << "Initialize WSA failed" << std::endl;  return; }  m_sockClient = socket(AF_INET, SOCK_DGRAM, 0);  m_TargetServer.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); m_TargetServer.sin_family = AF_INET; m_TargetServer.sin_port = htons(8090);  if (m_sockClient == -1) {  std::cout << "Create socket failed!" << std::endl;  WSACleanup(); } else {  //发送信息与服务器建立连接(必须加)  sendto(m_sockClient, "hello server", strlen("hello server"), 0, (sockaddr*)&m_TargetServer, sizeof(m_TargetServer)); }} void CClient::SendMsg(const char sendBuf[]){ sendto(m_sockClient, sendBuf, strlen(sendBuf), 0, (sockaddr*)&m_TargetServer, sizeof(m_TargetServer));}void CClient::RecMsg(){ char recBuf[1025];  while (1) {  //std::cout << "Begin rec...(client)" << std::endl;  int len = recvfrom(m_sockClient, recBuf, 1024, 0, 0, 0);  if (len > 0)  {   recBuf[len] = '\0';   std::cout << "Server say: " << recBuf << std::endl;  } } }CClient::~CClient(){ closesocket(m_sockClient); WSACleanup();}

2.3客户端主函数

#include #include #include  #include "CClient.h" using namespace std; int main(){ CClient client_UDP;  thread RecProc(&CClient::RecMsg, &client_UDP);  while (1) {  //cout << "Please input content:" << endl;  string content;  cin >> content;   client_UDP.SendMsg(content.c_str()); }   RecProc.join(); cout << "I love china!" << endl; system("pause"); return 0;}

3.效果图(win7+VS2017)

3.1服务端

3.2客户端

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