RapidXML的读写

把如下图几个文件放到工程目录（hpp文件）

新建工程进行读写测试，代码如下：

// ConsoleApplication1.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"

#include "rapidxml.hpp"
#include "rapidxml_utils.hpp" //rapidxml::file
#include "rapidxml_print.hpp" //rapidxml::print
#include <windows.h>
#include <iostream>

void writeFile(const char * file_name)
{
   char buf[1024] = { 0 };
   rapidxml::xml_document<> doc;
   // XML头的声明
   rapidxml::xml_node<>* declaration = doc.allocate_node(rapidxml::node_declaration);
   declaration->append_attribute(doc.allocate_attribute("version", "1.0"));
   declaration->append_attribute(doc.allocate_attribute("encoding", "utf-8"));
   doc.append_node(declaration);
   rapidxml::xml_node<>* root = doc.allocate_node(rapidxml::node_element, "root");
   doc.append_node(root);
   rapidxml::xml_node<>* comment1 = doc.allocate_node(rapidxml::node_comment, 0, "all students info");
   root->append_node(comment1);
   rapidxml::xml_node<>* students = doc.allocate_node(rapidxml::node_element, "students");
   for (int i = 0; i < 10; ++i)
   {
       rapidxml::xml_node<>* n1 = doc.allocate_node(rapidxml::node_element, "student");
       // doc.allocate_string 的作用是将源字符串深拷贝一份
       n1->append_attribute(doc.allocate_attribute("name", doc.allocate_string(buf)));
       n1->append_attribute(doc.allocate_attribute("score", doc.allocate_string(std::to_string(100 - i).c_str())));
       students->append_node(n1);
   }
   root->append_node(students);
   std::ofstream outfile(file_name, std::ios::out);
   if (outfile)
   {
       std::string text;
       rapidxml::print(std::back_inserter(text), doc, 0);
       outfile << text;
       outfile.close();
   }
}

void readFile(const char * fileName)
{
   std::ifstream inf(fileName, std::ios::in);
   if (!inf)
   {
       return;
   }

   inf.seekg(0, std::ios::end);
   int nLen = inf.tellg();
   inf.seekg(0, std::ios::beg);
   char * strc = new char[nLen+1];
   ZeroMemory(strc, nLen + 1);
   inf.read(strc, nLen);
   rapidxml::xml_document<> doc;
   doc.parse<0>(strc);
   rapidxml::xml_node<> *root = doc.first_node("root");
   int nSize = 0;

   rapidxml::xml_node<>* child = root->first_node("students")->first_node();
   while (child)
   {
           //判断属性是否存在
       rapidxml::xml_attribute<>* nameAttr = child->first_attribute("name");
       rapidxml::xml_attribute<>* scoreAttr = child->first_attribute("score");
       char *nameC;
       char *scoreC;
       if (nameAttr)
       {
           nameC = nameAttr->value();
       }
       if (scoreAttr)
       {
           scoreC = scoreAttr->value();
       }
       child = child->next_sibling();
   }

   /*for (rapidxml::xml_node<>* child = root->first_node("students")->first_node(); child; child = child->next_sibling())
   {
       char *nameC = child->first_attribute("name")->value();
       char * homea = child->first_attribute("score")->value();
   }*/

   delete strc;
   strc = NULL;

}

int _tmain(int argc, _TCHAR* argv[])
{
   writeFile("11.xml");
   readFile("11.xml");
   return 0;
}

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