xp的网络编程代码

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//接收端

#include <Winsock2.h>
#include <stdio.h>
#pragma comment(lib,"Ws2_32.lib") //连接库

void main(){
   //加载嵌套字库
   WORD wVersionRequested;
   WSADATA wsaData;
   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;
   }

   //创建用于监听的嵌套字
   SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);

   SOCKADDR_IN addrSrv;
   addrSrv.sin_family=AF_INET;
   addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
   addrSrv.sin_port=htons(6000);

   //绑定嵌套字
   bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
   //将嵌套字设为监听模式
   listen(sockSrv,5);

   SOCKADDR_IN addrClient;
   int len=sizeof(SOCKADDR);

while(1){

SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len); //死等

   char sendBuf[100];
   sprintf_s(sendBuf,"Welcome %s to MFC",inet_ntoa(addrClient.sin_addr));

   //发送数据
   send(sockConn,sendBuf,strlen(sendBuf)+1,0);
   char revBuf[100];

   //接受数据
   recv(sockConn,revBuf,100,0);

   //打印数据
   printf("%s\n",revBuf);

   //关闭嵌套字
   closesocket(sockConn);
   }

}

//发送端
#include <Winsock2.h>
#include <stdio.h>

void main(){
   //加载嵌套字库
   WORD wVersionRequested;
   WSADATA wsaData;
   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;
   }

   //创建用于监听的嵌套字
   SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);

   SOCKADDR_IN addrSrv;
   addrSrv.sin_family=AF_INET;
   addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
   addrSrv.sin_port=htons(6000);

   //向服务器发送请求
   connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
   //接收数据
   char recvBuf[100];
   recv(sockClient,recvBuf,100,0);
   printf("%s\n",recvBuf);
   send(sockClient,"This is lisi",strlen("This is lisi")+1,0);

   closesocket(sockClient);
   WSACleanup();

}