读写XML文件

原文:使用 MSXML 分析器处理 XML 文档
#include <atlbase.h>
#include <iostream>
using namespace std;
//<?xml version="1.0"?>
//<xmldata>
    //<xmlnode />
    //<xmltext>Hello, World!</xmltext>
//</xmldata>
void main()
{
    //初始化COM运行库
    CComPtr<IXMLDOMDocument> spXMLDOM;
    HRESULT hr = CoInitialize(NULL);
    hr=spXMLDOM.CoCreateInstance(__uuidof(DOMDocument));
    if (FAILED(hr))
        throw "Unable to create XML parser object!";
    if(spXMLDOM.p==NULL)
        throw "Unable to create XML parser object!";
    //将XML文档加载到分析器
    VARIANT_BOOL bSuccess=false;
    hr=spXMLDOM->load(CComVariant(L"1.xml"),&bSuccess);
    if(FAILED(hr))
        throw "Unable to load XML document into the parser!";
    if (!bSuccess)
        throw "Unable to load XML document into the parser!";
    //查找节点
    CComBSTR bstrSS(L"xmldata/xmlnode");
    CComPtr<IXMLDOMNode> spXMLNode;
    hr=spXMLDOM->selectSingleNode(bstrSS,&spXMLNode);
    if (FAILED(hr))
        throw "Unable to locate 'xmlnode' XML node!";
    if (spXMLNode.p == NULL)
        throw "Unable to locate 'xmlnode' XML node!";
    //在该节点下创建子节点
    CComPtr<IXMLDOMNode> spXMLChildNode;
    hr=spXMLDOM->createNode(CComVariant(NODE_ELEMENT),CComBSTR("xmlchildnode"),NULL,&spXMLChildNode);
    if(FAILED(hr))
    &