学步园

Sever端：

#include"WinSock2.h"
#include "time.h"
#include "stdio.h"

#include <iostream>

#pragma comment(lib,"WS2_32")

using namespace std;

const int MaxLine = 1024;

int main()
{
	int lRet = 0;
	WSADATA lWsaData;
	if ((lRet = WSAStartup(MAKEWORD(2,2), &lWsaData)) != 0)
	{
		cout << "Error " << lRet << endl;
		return 0;
	}

	int lListen = 0, lConnfd = 0;
	SOCKADDR_IN lServAddr;
	char lBuf[MaxLine];
	time_t lTicks;

	lServAddr.sin_family = AF_INET;
	lServAddr.sin_addr.s_addr = htonl(INADDR_ANY);
	lServAddr.sin_port = htons(13);

	SOCKET lSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (INVALID_SOCKET == lSocket)
	{
		cout << "INVALID_SOCKET" << endl;
		return 0;
	}
	bind(lSocket,(sockaddr*)(&lServAddr),sizeof(lServAddr));
	listen(lSocket,5);

	while(true)
	{
		SOCKET lSeverSocket = accept(lSocket,(sockaddr*)NULL,NULL);
		lTicks = time(NULL);
		sprintf(lBuf, "%.24s\r\n", ctime(&lTicks));
		send(lSeverSocket,lBuf,strlen(lBuf),0);
		closesocket(lSeverSocket);
	}
}

Client 端：

#include<WinSock2.h>

#include <iostream>
#include <string>

using namespace std;

#pragma comment(lib, "WS2_32")

const int MaxLine = 1024;

int main()
{
	char lReadline[MaxLine];
	int lRet = 0;
	WSADATA lWsaData;
	if ((lRet = WSAStartup(MAKEWORD(2,2), &lWsaData)) != 0)
	{
		cout << "Error " << lRet << endl;
		return 0;
	}
	SOCKADDR_IN lAddr;
	lAddr.sin_family = AF_INET;
	lAddr.sin_port = htons(13);

	SOCKET lSocket = socket(AF_INET, SOCK_STREAM, 0);
	if (INVALID_SOCKET == lSocket)
	{
		cout << "INVALID_SOCKET" << endl;
		return 0;
	}
	lAddr.sin_addr.s_addr = inet_addr("192.168.1.102");
	if (connect(lSocket,(sockaddr*)(&lAddr),sizeof(lAddr)) < 0 )
	{
		cout << "connect error" << endl;
		return 0;
	}
	int lNum = 0;
	if ( (lNum = recv(lSocket,lReadline,MaxLine,0)) > 0)
	{
		string lStr(lReadline,lNum-1);
		cout << lStr << endl;
	}
	return 0;
}

具体含义可以参考原书，Stevens大师已经事无巨细地把每行代码都做了解释，感觉很适合初学者学习。

对于网络编程，我是初学者，在这里想把书中的原理搞明白，把代码自己敲成winsock下的，至少把代码重新看一遍吧，呵呵。

勿在浮沙筑高台！——侯捷。

牢记侯捷大师的名言！