btree_xml

// g++ btree.cpp

#include "rapidxml.hpp"
#include <iostream>
#include <vector>
#include <fstream>

using namespace std;
using namespace rapidxml;

xml_node<> * tree;

void buildTreeFromXml(char * filename)
{
	xml_document<> doc;

	// Read the xml file into a vector
	ifstream theFile (filename);
	vector<char> buffer((istreambuf_iterator<char>(theFile)), istreambuf_iterator<char>());
	buffer.push_back('\0');

	// Parse the buffer using the xml file parsing library into doc 
	doc.parse<0>(&buffer[0]);

	// Find our root node
	tree = doc.first_node();
	tree->name();

	cout << "first node is " << tree->name() << endl; 
}

// Print node, go left and then right, recursively
void traverse(xml_node<> * node, string prefix)
{
	prefix = prefix + "-" + node->name();
	cout << prefix << ":";

	// Visit following nodes
	for (xml_node<> * child = node->first_node(); child; child = child->next_sibling())
	{
		traverse(child, prefix);
	}
}

int main(int argc, char * argv[])
{
	if(argc != 2)
	{
		printf("Usage %s file-to-process.xml\n", argv);
		return -1;
	}

	buildTreeFromXml(argv[1]);
	traverse(tree, ""), cout << endl;

	return 0;
}