XML解析器(TinyXML)的使用指南

1. #include <iostream>
      #include <fstream>
      #include "tinyxml.h"
using namespace std;
int main()
{
string filename = "first.xml";
TiXmlDocument* doc = new TiXmlDocument(filename.c_str());
//
// 在这里复制文件
//
std::ifstream ifs(filename.c_str());
char buffer[1024];
char c, *p = buffer;
while(ifs.get(c))
{
  *p++=c;
}
*p = 0;
ifs.close();
//
if(!doc->Parse(buffer))
{
  cout << doc->ErrorDesc() << endl;
}
const TiXmlElement* root = doc->RootElement();
for( const TiXmlNode* child = root->FirstChild();
  child;
  child=child->NextSibling())
{
  OutputDebugStringA(child->Value());
  /*
  生成一个StaticBox
  <staticbox mesh="crate.mesh">
  <position x="-8" y="2" z="4" />
  <dimension x="2" y="4" z="2" />
  </staticbox>
  */
  if((child->Type() == TiXmlNode::ELEMENT) && (!strcmp(child->Value(),"staticbox")))
  {
   const TiXmlElement *box = (const TiXmlElement*)child;
   double px, py, pz;
   double dx, dy, dz;
   std::string mesh;
   mesh = box->Attribute("mesh");
   for(const TiXmlNode *sub_tag = box->FirstChild(); sub_tag; sub_tag = sub_tag->NextSibling() )
   {
    if(sub_tag->Type() == TiXmlNode::ELEMENT)
    {
     const TiXmlElement *sub_element = (const TiXmlElement*)sub_tag;
     if(!strcmp(sub_tag->Value(),"position"))
     {
      px = (sub_element->Attribute("x",&px))?px:0.0;
      py = (sub_element->Attribute("y",&py))?py:0.0;
      pz = (sub_element->Attribute("z",&pz))?pz:0.0;
     }
     else if(!strcmp(sub_tag->Value(),"dimension"))
     {
      dx = (sub_element->Attribute("x",&dx))?dx:1.0;
      dy = (sub_element->Attribute("y",&dy))?dy:1.0;
      dz = (sub_element->Attribute("z",&dz))?dz:1.0;
     }
    }
   }
   cout << "<StaticBox>\n";
   cout << "\tPosition = (" << px << ", " << py << ", " << pz << ")\n";
   cout << "\tDimension = (" << dx << ", " << dy << ", " << dz << ")\n\n";
  }
}
delete doc;
getchar();
return 0;
}