C语言经典-socket编程

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winsocket编程 //这个不错// 服务器代码

#include <Winsock2.h>

#include <stdio.h>

void main() {

WORD wVersionRequested; //版本号

WSADATA wsaData; //数据

int err;

wVersionRequested = MAKEWORD(1,1);

err = WSAStartup(wVersionRequested,&wsaData);

if( err != 0) { return; }

if(LOBYTE( wsaData.wVersion ) != 1|| HIBYTE( wsaData.wVersion) != 1) {

WSACleanup(); return; }

SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0); //建立套接字

SOCKADDR_IN addrSrv;

addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);

addrSrv.sin_family=AF_INET;

addrSrv.sin_port=htons(6000);

bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); //绑定端口

listen(sockSrv,5); //转换socket套接子为侦听套接子

SOCKADDR_IN addrClient;

int len=sizeof(SOCKADDR);

while(1) //无限循环

{ SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len); char sendBuf[100]; sprint(sendBuf,"Welcome %s to <a href="http://www.sunxin.org\" ,"="">http://www.sunxin.org",inet_ntoa(addrClient.sin_addr));

send(sockConn,sendBuf,strlen(sendBuf)+1,0);

char recvBuf[100];

recv(sockConn,recvBuf);

printf("%sn",recvBuf);

closesocket(sockConn);

WSACleanup();

}

注：这是Server端；File->New->Win32 Console Application，工程名：TcpSrv；然后，File->New->C++ Source File，文件名：TcpSrv；在该工程的Setting的Link的Object/library modules项要加入ws2_32.lib

#include <Winsock2.h>

#include <stdio.h>

void main()

{

WORD wVersionRequested;

WSADATA wsaData;

int err;

wVersionRequested = MAKEWORD(1,1);

err = WSAStartup(wVersionRequested,&wsaData); //启动winsock Dll

if( err != 0) {

return; }

if(LOBYTE( wsaData.wVersion ) != 1|| HIBYTE( wsaData.wVersion) != 1)

{ WSACleanup();

return; }

SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);

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));

char recvBuf[100];

recv(sockClient,recvBuf,100,0);

printf("%sn",recvBuf);

send(sockClient,"This is zhangsan",strlen("This is zhangsan")+1,0);

closesocket(sockClient);

WSACleanup();

}

注：这是Client端；File->New->Win32 Console Application，工程名：TcpClient；然后，File->New->C++ Source File，文件名：TcpClient；同理，在该工程的Setting的Link的Object/library modules项要加入ws2_32.lib

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