网络编程; winSock;

#include <Winsock2.h>
#include <stdio.h>

int main()
{
////////////////////////////////////////////
//设置选择WinSock协议

WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD( 1, 1 );

err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 )
{
return 1;
}

if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 )
{
WSACleanup( );
return 1;
}

////////////////////////////////////////////////////////

SOCKET sockSrv=socket(AF_INET,SOCK_DGRAM,0);
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));

char recvBuf[100];
char sendBuf[100];
char tempBuf[100];

SOCKADDR_IN addrClient;
int len =sizeof(SOCKADDR);

while(true)
{
recvfrom(sockSrv,recvBuf,100,0,(SOCKADDR*)&addrClient,&len);
if('q'==recvBuf[0])
{
sendto(sockSrv,"q",strlen("q")+1,0,(SOCKADDR*)&addrClient,len);
printf("chat end/n");
break;
}
else
{
sprintf(tempBuf,"%s say: %s",inet_ntoa(addrClient.sin_addr),recvBuf);
printf("%s/n",tempBuf);
printf("请输入数据/n");
gets(sendBuf);
sendto(sockSrv,sendBuf,strlen(sendBuf)+1,0,(SOCKADDR*)&addrClient,len);
}
}
closesocket(sockSrv);
WSACleanup();
return 0;
}

#include <Winsock2.h>
#include <stdio.h>

int main()
{
////////////////////////////////////////////
//设置选择WinSock协议

WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD( 1, 1 );

err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 )
{
return 1;
}

if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 )
{
WSACleanup( );
return 1;
}

////////////////////////////////////////////////////////

SOCKET sockClient=socket(AF_INET,SOCK_DGRAM,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);

char recvBuf[100];
char sendBuf[100];
char tempBuf[100];

int len =sizeof(SOCKADDR);

while(1)
{
printf("输入数据：");
gets(sendBuf);
sendto(sockClient,sendBuf,strlen(sendBuf)+1,0,(SOCKADDR*)&addrSrv,len);
recvfrom(sockClient,recvBuf,100,0,(SOCKADDR*)&addrSrv,&len);
if('q'==recvBuf[0])
{
sendto(sockClient,"q",strlen("q")+1,0,(SOCKADDR*)&addrSrv,len);
printf("chat end/n");
break;
}
else
{
sprintf(tempBuf,"%s say:%s",inet_ntoa(addrSrv.sin_addr),recvBuf);
puts(tempBuf);
}
}

closesocket(sockClient);
WSACleanup();
return 0;
}

#include <Winsock2.h>
#include <stdio.h>

int main()
{
////////////////////////////////////////////
//设置选择WinSock协议

WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD( 1, 1 );

err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 )
{
return 1;
}

if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 )
{
WSACleanup( );
return 1;
}

////////////////////////////////////////////////////////
SOCKET	sockSrv = socket(AF_INET,SOCK_STREAM,0); // 创建套接字
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));

listen(sockSrv,SOMAXCONN);

SOCKADDR_IN addrClient;
int len=sizeof(SOCKADDR);

while(true)
{
SOCKET	sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);
char sendBuf[100];
sprintf(sendBuf,"hello,%s",inet_ntoa(addrClient.sin_addr));
send(sockConn,sendBuf,strlen(sendBuf)+1,0);
char recvBuf[100];
recv(sockConn,recvBuf,strlen(recvBuf),0);
printf("%s/n",recvBuf);
closesocket(sockConn);
}

return 0;
}

#include <Winsock2.h>
#include <stdio.h>
#include <windows.h>
int main()
{
////////////////////////////////////////////
//设置选择WinSock协议

WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD( 1, 1 );

err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 )
{
return 1;
}

if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 )
{
WSACleanup( );
return 1;
}

////////////////////////////////////////////////////////
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("%s/n",recvBuf);
send(sockClient,"123123",strlen("123123")+1,0);
closesocket(sockClient);
WSACleanup();

system("pause");
}