关于tinyxml解析文件请问 _XML/SOAP

关于tinyxml解析文件请教。
如下是这个xml文件的内容，
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<Info>
<SingleCity CityCode="010">
<stu_name>hami</stu_name>
</SingleCity>
<SingleCity CityCode="020">
<stu_name>hami2</stu_name>
</SingleCity>
<SingleCity CityCode="021">
<stu_name>hami3</stu_name>
</SingleCity>
</Info>

我用以下代码循环判断SingleCity的个数

C/C++ code


TiXmlElement *personElement = personDoc->RootElement();    
    TiXmlElement*SiblingElement = personElement->FirstChildElement();
    int i=0;
    while ( SiblingElement != NULL )
    {    
                i++;    
        cout<<SiblingElement->Value()<<endl; 
        SiblingElement = SiblingElement->NextSiblingElement();
    }

可是通过跟踪调试，SiblingElement 就是无法遍历到<SingleCity CityCode="021">，求各位网友给点提示，谢谢！

------解决方案--------------------
TiXmlElement *personElement = personDoc->RootElement();
TiXmlElement*pElem= personElement->FirstChildElement();
for( pElem; pElem; pElem=pElem->NextSiblingElement())
{
cout<<pElem->Value()<<endl;
}