windows环境下使用socket进行tcp通信

 客户端

#define WIN32 _LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS 
#include<iostream>
#include<WinSock2.h>
#include<Windows.h>
#include<stdio.h>using namespace std;
#pragma comment (lib, "ws2_32.lib") 
//#ws2_32.lib
int main()
{WORD ver = MAKEWORD(2, 2);WSADATA dat;WSAStartup(ver, &dat);//1.创立socket 1.IPV4网络  类型:数据流  TCP//套接字SOCKET _sock = socket(AF_INET, SOCK_STREAM, 0);//2.connect连接服务器sockaddr_in _sin = {};_sin.sin_family = AF_INET;_sin.sin_port = htons(4567);//host_to_net unsigned short_sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");if (SOCKET_ERROR == connect(_sock, (sockaddr*)&_sin, sizeof(_sin))){printf("链接失败\n");}else {printf("链接网络成功\n");};//3，recv接收数据 监听网络接口char recvbuffer[1024] = {};;if (SOCKET_ERROR == recv(_sock, recvbuffer, sizeof(recvbuffer), 0)){printf("接受失败\n");}else {printf("接受成功\n");}cout << recvbuffer << endl;//6.关闭closesocket(_sock);WSACleanup();return 0;
}

服务端

#define WIN32 _LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS 
#include<iostream>
#include<WinSock2.h>
#include<Windows.h>using namespace std;
#pragma comment (lib, "ws2_32.lib") 
//#ws2_32.lib
int main()
{WORD ver = MAKEWORD(2, 2);WSADATA dat;WSAStartup(ver, &dat);//1.创立socket 1.IPV4网络  类型:数据流  TCP//套接字SOCKET _sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);//2.bind绑定接收客户端sockaddr_in _sin = {};_sin.sin_family = AF_INET;_sin.sin_port = htons(4567);//host_to_net unsigned short_sin.sin_addr.S_un.S_addr = INADDR_ANY;//inet_addr("127.0.0.1")if (SOCKET_ERROR==bind(_sock, (sockaddr*)&_sin, sizeof(_sin)) ){printf("绑定失败\n");}else {printf("绑定网络成功\n");};//3，listen 监听网络接口if (SOCKET_ERROR == listen(_sock, 5)){printf("监听失败\n");}else {printf("监听成功\n");}//4.接受数据sockaddr_in _clientaddr = {};int naddrlen = sizeof(_clientaddr);SOCKET _clientsocket = INVALID_SOCKET;while (true){_clientsocket = accept(_sock, (sockaddr*)&_clientaddr, &naddrlen);if (_clientsocket == INVALID_SOCKET){printf("错误，接受无效客户端socket....\n");}cout << "新客户端加入： ip= " << inet_ntoa(_clientaddr.sin_addr)<<endl; //5.send 向客户端发送一条数据char msgBuf[] = "hello, I'M server";send(_clientsocket, msgBuf, strlen(msgBuf) + 1, 0);}//6.关闭closesocket(_sock);WSACleanup();return 0;
}