#include <Winsock2.h>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib")

void main()
{
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;
}

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[200];

SOCKADDR_IN addrClient;
int len=sizeof(SOCKADDR);

while(1)
{
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;
}
sprintf(tempBuf,"%s say:%s",inet_ntoa(addrClient.sin_addr),recvBuf);
printf("%s\n",tempBuf);
printf("Please input data:\n");
gets(sendBuf);
sendto(sockSrv,sendBuf,strlen(sendBuf)+1,0,(SOCKADDR*)&addrClient,len);
}
closesocket(sockSrv);
WSACleanup();
}
#include <Winsock2.h>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib")

void main()
{
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;
}
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[200];

int len=sizeof(SOCKADDR);

while(1)
{
printf("please input data:\n");
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;
}
sprintf(tempBuf,"%s say:%s",inet_ntoa(addrSrv.sin_addr),recvBuf);
printf("%s\n",tempBuf);
}
closesocket(sockClient);
WSACleanup();
}




















































































































