rapidxml编写xml文件（er）

一、以rapidxml::node_declaration形式写xml文件第一行

 int write(void)
 {
     int ret = ;

     rapidxml::xml_document<> doc;
     rapidxml::xml_node<> *declear = doc.allocate_node(rapidxml::node_declaration);
     declear->append_attribute(doc.allocate_attribute("version", "1.0"));
     declear->append_attribute(doc.allocate_attribute("encoding", "utf-8"));
     doc.append_node(declear);

     rapidxml::xml_node<> *p_root_comment = doc.allocate_node(rapidxml::node_comment, NULL, "根节点注释");
     doc.append_node(p_root_comment);

     rapidxml::xml_node<> *p_root = doc.allocate_node(rapidxml::node_element, "Root");
     doc.append_node(p_root);

     p_root->append_node(doc.allocate_node(rapidxml::node_comment, NULL, "信息"));
     rapidxml::xml_node<> *p_one_node = doc.allocate_node(rapidxml::node_element, "Information");
     p_one_node->append_node(doc.allocate_node(rapidxml::node_comment, NULL, "姓名"));
     p_one_node->append_node(doc.allocate_node(rapidxml::node_element, "Name", "Toney"));
     p_one_node->append_node(doc.allocate_node(rapidxml::node_comment, NULL, "年龄"));
     p_one_node->append_node(doc.allocate_node(rapidxml::node_element, "Age", ""));
     p_one_node->append_node(doc.allocate_node(rapidxml::node_comment, NULL, "身份ID"));
     p_one_node->append_node(doc.allocate_node(rapidxml::node_element, "ID", ""));
     p_root->append_node(p_one_node);

     p_root->append_node(doc.allocate_node(rapidxml::node_comment, NULL, "成绩"));
     rapidxml::xml_node<> *p_second_node = doc.allocate_node(rapidxml::node_element, "Score");
     p_second_node->append_node(doc.allocate_node(rapidxml::node_comment, NULL, "语文"));
     p_second_node->append_node(doc.allocate_node(rapidxml::node_element, "语文", ""));
     p_second_node->append_node(doc.allocate_node(rapidxml::node_comment, NULL, "数学"));
     p_second_node->append_node(doc.allocate_node(rapidxml::node_element, "数学", ""));
     p_second_node->append_node(doc.allocate_node(rapidxml::node_comment, NULL, "英语"));
     p_second_node->append_node(doc.allocate_node(rapidxml::node_element, "英语", ""));
     p_root->append_node(p_second_node);

     std::string str_text;
     str_text.clear();
     rapidxml::print(std::back_inserter(str_text), doc);
     doc.clear();

     std::ofstream out("testInfor.xml");
     out << str_text;

     std::cout << str_text.c_str() << std::endl;

     system("pause");

     return ret;
 }

运行结果：