// xml_test1.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <windows.h>
#include <vector>
#include <string>
#include "pugixml.hpp"

#pragma comment(lib,"pugixmld.lib")
 
int _tmain(int argc,_TCHAR* argv[])
{
	pugi::xml_document doc;
	// 加载xml文件
	pugi::xml_parse_result ret = doc.load_file(_T("test.xml"));

	pugi::xml_node Messages = doc.child("MyApp").child("Messages");
	std::vector<std::pair<std::string,std::string> > vecNode;

	// 读取原有的Welcome 节点和Farewell节点，并保存其值
	for (pugi::xml_node Plugin = Messages.first_child(); Plugin; Plugin = Plugin.next_sibling())
	{
		typedef std::pair<std::string,std::string> string_Pair;
		std::string strNodeName = Plugin.name();
		std::string strValue = Messages.child_value(strNodeName.c_str());
		vecNode.push_back(string_Pair(strNodeName,strValue));
	}

	pugi::xml_node window = doc.child("MyApp").child("Windows");
	for (int i =0;i<vecNode.size();i++)
	{
		// 添加Welcome 节点和Farewell节点
		pugi::xml_node new_node = window.append_child(vecNode[i].first.c_str());

		new_node.append_child(pugi::node_pcdata).set_value(vecNode[i].second.c_str());
		// 添加param 节点
		pugi::xml_node param = window.insert_child_before("param",new_node);
		param.append_attribute("name") = "version";
		param.append_attribute("value") = 1.1;
		param.insert_attribute_after("type",param.attribute("name")) = "float";
	}

	doc.save_file(_T("test.xml"));
	getchar();
	return 0;
}

xml 文件：

<?xml version="1.0"?>
<MyApp>
	<Messages>
		<Welcome>Welcome to MyApp</Welcome>
		<Farewell>Thank you for using MyApp</Farewell>
	</Messages>
	<Windows>
		<Window name="MainFrame" x="5" y="15" w="400" h="250" />
		<param name="version" type="float" value="1.1" />
		<Welcome>Welcome to MyApp</Welcome>
		<param name="version" type="float" value="1.1" />
		<Farewell>Thank you for using MyApp</Farewell>
	</Windows>
</MyApp>