Remark：
A.服务器程序和客户端程序都要添加库文件ws2_32.lib project->setting->link->Object/library modules:最后的地方添加ws2_32.lib,要加空格
B.第一次端口设置6000被占用，改为8000后正常
1.服务器程序的实现如下：
#include <stdio.h>
#include <WINSOCK2.H>
void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
//apply for version
wVersionRequested = MAKEWORD(1, 1);
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
return;
}
//check version
if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 ) {
WSACleanup( );
return;
}
//declare socket;
SOCKET sockserv = socket(AF_INET,SOCK_STREAM,0);
//declare addr for Serv
SOCKADDR_IN addrServ;
addrServ.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
addrServ.sin_family = AF_INET;
//set port;
addrServ.sin_port = htons(8000);
//binding ip;
if(bind(sockserv,(SOCKADDR*)&addrServ,sizeof(SOCKADDR)))
{
printf("%s","binding error");
return;
}
// can listen for 5 clients PC
if (listen(sockserv,5))
{
printf("%s","listengiing error");
return;
}
//declare addr for Client
SOCKADDR_IN addrClient;
int len = sizeof(SOCKADDR);
while(1)
{
//waitting client send data
SOCKET sockConn = accept(sockserv,(SOCKADDR*)&addrClient,&len);
char sendBuf[100];
sprintf(sendBuf,"Welcome %s :\n",inet_ntoa(addrClient.sin_addr));
//send data to client
send(sockConn,sendBuf,sizeof(sendBuf)+1,0);
char recvBuf[100] = {0};
recv(sockConn,recvBuf,sizeof(recvBuf)+1,0);
printf("%s",recvBuf);
closesocket(sockConn);
}
2.客户端的程序：
#include <stdio.h>
#include <WINSOCK2.H>
void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
//apply for version
wVersionRequested = MAKEWORD(1, 1);
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
return;
}
//check version
if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 ) {
WSACleanup( );
return;
}
//declare socket;
SOCKET sockserv = socket(AF_INET,SOCK_STREAM,0);
//declare addr for Serv
SOCKADDR_IN addrServ;
addrServ.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
addrServ.sin_family = AF_INET;
//set port;
addrServ.sin_port = htons(8000);
//binding ip;
if(bind(sockserv,(SOCKADDR*)&addrServ,sizeof(SOCKADDR)))
{
printf("%s","binding error");
return;
}
// can listen for 5 clients PC
if (listen(sockserv,5))
{
printf("%s","listengiing error");
return;
}
//declare addr for Client
SOCKADDR_IN addrClient;
int len = sizeof(SOCKADDR);
while(1)
{
//waitting client send data
SOCKET sockConn = accept(sockserv,(SOCKADDR*)&addrClient,&len);
char sendBuf[100];
sprintf(sendBuf,"Welcome %s :\n",inet_ntoa(addrClient.sin_addr));
//send data to client
send(sockConn,sendBuf,sizeof(sendBuf)+1,0);
char recvBuf[100] = {0};
recv(sockConn,recvBuf,sizeof(recvBuf)+1,0);
printf("%s",recvBuf);
closesocket(sockConn);
}
}