///* 编译环境: visual c++ */
//#include
//#include
//#pragma comment(lib,"ws2_32.lib")
//
//int doit(int, char **)
//{
// char host_name[255];
// //获取本地主机名称
// if (gethostname(host_name, sizeof(host_name)) == SOCKET_ERROR) {
// printf("Error %d when getting local host name.\n", WSAGetLastError());
// return 1;
// }
// printf("Host name is: %s\n", host_name);
//
// //从主机名数据库中得到对应的“主机”
// struct hostent *phe = gethostbyname(host_name);
// if (phe == 0) {
// printf("Yow! Bad host lookup.");
// return 1;
// }
//
// //循环得出本地机器所有IP地址
// for (int i = 0; phe->h_addr_list[i] != 0; ++i) {
// struct in_addr addr;
// memcpy(&addr, phe->h_addr_list[i], sizeof(struct in_addr));
// printf("Address %d : %s\n" , i, inet_ntoa(addr));
// }
//
// return 0;
//}
//
//int main(int argc, char *argv[])
//{
// WSAData wsaData;
// if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0) {
// return 255;
// }
//
// int retval = doit(argc, argv);
//
// WSACleanup();
// return retval;
//}

#include
#include
#include
#include
#include "tinyxml.h"
#pragma comment(lib, "tinyxml.lib")
#pragma comment(lib, "tinyxmlSTL.lib")
using namespace std;

std::string getIp()
{
CString url = "http://ip.dnsexit.com/";
CString content;
CString data;
DWORD dwStatusCode;
CInternetSession session("HttpClient");

CHttpFile\* pfile = (CHttpFile \*)session.OpenURL(url);  
pfile -> QueryInfoStatusCode(dwStatusCode);  
if(dwStatusCode == HTTP\_STATUS\_OK)  
{  
    while (pfile -> ReadString(data))  
    {  
        content  += data;  
    }  
}  
pfile -> Close();  
delete pfile;  
session.Close();  
return std::string(content);  

}

void getXml(string url)
{
CFile file(("temp.xml"), CFile::modeCreate|CFile::modeWrite);
CString content;
CString data;
DWORD dwStatusCode;
CInternetSession session("HttpClient");

CHttpFile\* pfile = (CHttpFile \*)session.OpenURL(url.c\_str());  
pfile -> QueryInfoStatusCode(dwStatusCode);  
if(dwStatusCode == HTTP\_STATUS\_OK)  
{  
    while (pfile -> ReadString(data))  
    {  
        content  += data;  
    }  
}  
pfile -> Close();  
delete pfile;  
session.Close();  
file.Write(content, content.GetLength());  
file.Close();  

}

void readXml()
{
TiXmlDocument doc("temp.xml");
doc.LoadFile();
TiXmlElement* root = doc.RootElement();
TiXmlNode* item = root->FirstChild("product");
TiXmlNode* child = item->FirstChild();
string ip = child->ToElement()->GetText();
if (!ip.empty())
{
cout << "ip = " << ip << endl;
}

child = item->IterateChildren(child);  
string addr = child->ToElement()->GetText();  
if (!addr.empty())  
{  
    cout << "address = " << addr << endl;  
}  

}

int main()
{
string str = "http://www.yodao.com/smartresult-xml/search.s?type=ip&q=";
str+= getIp();
getXml(str);
readXml();
system("del temp.xml");
system("pause");
return 0;
}

tinyxml的编译参数要严格与所写程序匹配，比如runtime library Use of MFC, Character Set,否则就会爆出这样不知所云的错误：

1>libcmt.lib(invarg.obj) : error LNK2005: __invoke_watson already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(wsetloca.obj) : error LNK2005: __configthreadlocale already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: __amsg_exit already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: __cexit already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: __exit already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: __initterm_e already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(crt0dat.obj) : error LNK2005: _exit already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(mlock.obj) : error LNK2005: __lock already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(mlock.obj) : error LNK2005: __unlock already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(winapisupp.obj) : error LNK2005: ___crtSetUnhandledExceptionFilter already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(winapisupp.obj) : error LNK2005: ___crtTerminateProcess already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(winapisupp.obj) : error LNK2005: ___crtUnhandledException already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(winxfltr.obj) : error LNK2005: __XcptFilter already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(hooks.obj) : error LNK2005: "void __cdecl terminate(void)" (?terminate@@YAXXZ) already defined in msvcrtd.lib(MSVCR110D.dll)

1>libcmt.lib(crt0init.obj) : error LNK2005: ___xi_a already defined in msvcrtd.lib(cinitexe.obj)

1>libcmt.lib(crt0init.obj) : error LNK2005: ___xi_z already defined in msvcrtd.lib(cinitexe.obj)

1>libcmt.lib(crt0init.obj) : error LNK2005: ___xc_a already defined in msvcrtd.lib(cinitexe.obj)

1>libcmt.lib(crt0init.obj) : error LNK2005: ___xc_z already defined in msvcrtd.lib(cinitexe.obj)

1>libcmt.lib(errmode.obj) : error LNK2005: ___set_app_type already defined in msvcrtd.lib(MSVCR110D.dll)

1>LINK : warning LNK4098: defaultlib 'msvcrtd.lib' conflicts with use of other libs; use /NODEFAULTLIB:library

1>msvcrtd.lib(cinitexe.obj) : warning LNK4098: defaultlib 'libcmt.lib' conflicts with use of other libs; use /NODEFAULTLIB:library

1>D:\VS2010\OnlyForFun\OnlyForFun\Debug\ReadXml.exe : fatal error LNK1169: one or more multiply defined symbols found

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