#include <stdlib.h>
#include <stdio.h>
#include <winsock2.h>
#include <windows.h>
int main()
{
//加载Socket动态链接库
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
/* Tell the user that we could not find a usable */
/* WinSock DLL. */
return 1;
}
/* Confirm that the WinSock DLL supports 2.2.*/
/* Note that if the DLL supports versions greater */
/* than 2.2 in addition to 2.2, it will still return */
/* 2.2 in wVersion since that is the version we */
/* requested. */
if ( LOBYTE( wsaData.wVersion ) != 2 ||
HIBYTE( wsaData.wVersion ) != 2 ) {
/* Tell the user that we could not find a usable */
/* WinSock DLL. */
WSACleanup( );
return 1;
}
/* The WinSock DLL is acceptable. Proceed. */
//1.创建套接字
SOCKET sockClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(INVALID_SOCKET == WSAGetLastError())
MessageBox(NULL, "Create Socket failed!", "Error", MB_OK);
//2.向服务器发送连接请求
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(6000);
connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));
//3.和服务器进行通信，接收或是发送数据
char recvBuf[100];
recv(sockClient, recvBuf, 100, 0);
if(SOCKET_ERROR == WSAGetLastError())
MessageBox(NULL, "Server recieve data failed!", "Error", MB_OK);
printf("%s\n", recvBuf);
char sendBuf[] = "Hello Server";
send(sockClient, sendBuf, sizeof(sendBuf) + 1, 0);
if(SOCKET_ERROR == WSAGetLastError())
MessageBox(NULL, "Server send data failed!", "Error", MB_OK);
//4.关闭套接字的资源，以及卸载套接字动态链接库
closesocket(sockClient);
WSACleanup();
return 0;
