服务端:// WSASever.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <WinSock2.h>
#include <Windows.h>
#pragma comment (lib,"wSock32.lib")int _tmain(int argc, _TCHAR* argv[])
{WORD wVersionRequested;WSADATA wsaData;int err;wVersionRequested = MAKEWORD(2, 2);err = WSAStartup(wVersionRequested, &wsaData);if (err != 0) {printf("WSAStartup failed with error: %d\n", err);return 1;}if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2){printf("Could not find a usable version of Winsock.dll\n");WSACleanup();return 1;}elseprintf("The Winsock 2.2 dll was found okay\n");//程序开始//创建socket->bing-》listen->accept->recv->send->closesocket
SOCKET severSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if (severSocket == INVALID_SOCKET){printf("new socket error!");}SOCKADDR_IN sockAddr;sockAddr.sin_port = htons(10086);sockAddr.sin_family = AF_INET;//IP地址表示方法/*方法1：  m_addr.sin_addr.S_un.S_un_b.s_b1 = 192; m_addr.sin_addr.S_un.S_un_b.s_b2 = 168; m_addr.sin_addr.S_un.S_un_b.s_b3 = 0; m_addr.sin_addr.S_un.S_un_b.s_b4 = 1;方法2：  m_addr.sin_addr.S_un.S_un_w.s_w1 = (168 << 8) | 192; m_addr.sin_addr.S_un.S_un_w.s_w2 = (1 << 8) | 0;方法3：  m_addr.sin_addr.S_un.S_addr = (1 << 24) | (0 << 16) | (168 << 8) | 192方法4;    service.sin_addr.s_addr = inet_addr("127.0.0.1");*///sockAddr.sin_addr.s_addr = inet_addr(INADDR_ANY);sockAddr.sin_addr.S_un.S_un_b.s_b1 = 127;sockAddr.sin_addr.S_un.S_un_b.s_b2 = 0;sockAddr.sin_addr.S_un.S_un_b.s_b3 = 0;sockAddr.sin_addr.S_un.S_un_b.s_b4 = 1;if (bind(severSocket, (sockaddr*)&sockAddr, sizeof(SOCKADDR_IN)) == SOCKET_ERROR){printf("bind error! %d\n", WSAGetLastError());}//监听1个if (listen(severSocket, 5) == SOCKET_ERROR){printf("listen error!%d\n", WSAGetLastError());}//创建一个一客户端连接的socketSOCKET sockLink = accept(severSocket, NULL, NULL);if (sockLink != INVALID_SOCKET){printf("communication sucess!\n");}int nErr=0;while (true){char pSeverBuff[MAXBYTE] = { 0 };nErr = recv(sockLink, pSeverBuff, MAXBYTE, 0);printf("%s(%d)%s\n", inet_ntoa(sockAddr.sin_addr), sockAddr.sin_port, pSeverBuff);send(sockLink, pSeverBuff, MAXBYTE, 0);//当客户端关闭时，服务端也随之关闭if (nErr == INVALID_SOCKET)break;}closesocket(severSocket);closesocket(sockLink);WSACleanup();return 0;}

客户端
// WASClient.cpp : 定义控制台应用程序的入口点。
////#include <WinSock2.h>一定要在#include <Windows.h>前面

#include "stdafx.h"
#include <WinSock2.h>
#include <Windows.h>
#pragma comment (lib,"wSock32.lib")int _tmain(int argc, _TCHAR* argv[])
{WORD wVersionRequested;WSADATA wsaData;int err;//版本检测wVersionRequested = MAKEWORD(2, 2);err = WSAStartup(wVersionRequested, &wsaData);if (err != 0) {printf("WSAStartup failed with error: %d\n", err);return 1;}if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {printf("Could not find a usable version of Winsock.dll\n");WSACleanup();return 1;}elseprintf("The Winsock 2.2 dll was found okay\n");//程序开始//创建socket-》连接connect-》发送send-》接受recv-》释放closesocke
SOCKET clientSocket=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if (clientSocket == INVALID_SOCKET){printf("new socket error!");}SOCKADDR_IN sockAddr;//一定要把主机字节序换成网络字节序 并是short类型   htons（）sockAddr.sin_port = htons(10086);sockAddr.sin_family = AF_INET;//IP地址表示方法/*方法1：  m_addr.sin_addr.S_un.S_un_b.s_b1 = 192; m_addr.sin_addr.S_un.S_un_b.s_b2 = 168; m_addr.sin_addr.S_un.S_un_b.s_b3 = 0; m_addr.sin_addr.S_un.S_un_b.s_b4 = 1; 方法2：  m_addr.sin_addr.S_un.S_un_w.s_w1 = (168 << 8) | 192; m_addr.sin_addr.S_un.S_un_w.s_w2 = (1 << 8) | 0; 方法3：  m_addr.sin_addr.S_un.S_addr = (1 << 24) | (0 << 16) | (168 << 8) | 192*/sockAddr.sin_addr.S_un.S_un_b.s_b1 = 127;sockAddr.sin_addr.S_un.S_un_b.s_b2 = 0;sockAddr.sin_addr.S_un.S_un_b.s_b3 = 0;sockAddr.sin_addr.S_un.S_un_b.s_b4 = 1;if (connect(clientSocket, (sockaddr*)&sockAddr, sizeof(SOCKADDR_IN)) != SOCKET_ERROR){printf("communication sucess!\n");}char pClientBuf[MAXBYTE] = {0};//请求连接while (TRUE){gets_s(pClientBuf);send(clientSocket, pClientBuf, MAXBYTE, 0);recv(clientSocket, pClientBuf, MAXBYTE, 0);printf("return from sever:%s\n", pClientBuf);}WSACleanup();closesocket(clientSocket);return 0;}