学步园

////服务器端
#include <Winsock2.h>
#include <stdio.h>

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_STREAM, 0);

SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(6601);

bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));

listen(sockSrv, 5);

SOCKADDR_IN addrClient;
int len = sizeof(SOCKADDR);

while (1)
{
SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len);
char sendBuf[100] = {0};
sprintf_s(sendBuf, 100, "Welcome %s to http://www.sunxin.org", inet_ntoa(addrClient.sin_addr));
send(sockConn, sendBuf, strlen(sendBuf) + 1, 0);
char recvBuf[100]={0};
recv(sockConn, recvBuf, 100, 0);
printf("%s\n", recvBuf);
closesocket(sockConn);
}

}

/////客服端

#include <Winsock2.h>//加裁头文件
#include <stdio.h>//加载标准输入输出头文件
void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD(2, 2);

err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0) {
/* Tell the user that we could not find a usable */
/* WinSock DLL.                                  */
return;
}
if (LOBYTE(wsaData.wVersion) != 2 ||
HIBYTE(wsaData.wVersion) != 2) {
/* Tell the user that we could not find a usable */
/* WinSock DLL.                                  */
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(6601);

connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));

char recvBuf[100] = {0};
recv(sockClient, recvBuf, 100, 0);
printf("%s\n", recvBuf);
send(sockClient, "This is zhangsan ", strlen("This is zhangsan ")+1,0);

closesocket(sockClient);
WSACleanup();
}

///////////////////需要注意的东西：

头文件问题：

#include <Winsock2.h>//加裁头文件
#include <stdio.h>//加载标准输入输出头文件

.lib问题；

两个都要加上

下面是关于启动问题：

显示服务器端，再是客户端；

如果在一个工作区 则可以这样选择：

最后按下ctr+F5;够详细了吧！！