C++ in UNIX when parsing an xml file using libxml2

Question

How to retrieve node and attribute values from xml file in C++ using libxml2 by using xpath ?

Thanks in advance, Bhargava

Answer 1

sp1.xml:

<users noofids="1">
        <user user="vin" password="abc"/>
</users>

Program:

#include <libxml/xpath.h>
#include <libxml/tree.h>
#include <iostream>
using namespace std;

int
main (int argc, char **argv)
{
  char ID[25];
  xmlInitParser ();
  //LIBXML_TEST_VERSION
  xmlDoc *doc = xmlParseFile ("sp1.xml");
  xmlXPathContext *xpathCtx = xmlXPathNewContext (doc);
  xmlXPathObject *xpathObj =
    xmlXPathEvalExpression ((xmlChar *) "users/user", xpathCtx);
  xmlNode *node = xpathObj->nodesetval->nodeTab[0];
  xmlAttr *attr = node->properties;
  while (attr)
    {
      //if(!xmlStrcmp(attr->name,(const xmlChar *)"noofids"))
      //sprintf(ID,"%s",attr->children->content);
      std::cout << "Attribute name: " << attr->name << "  value: " << attr->
    children->content << std::endl;
      attr = attr->next;
    }
  //std::cout<<"ID: "<<ID<<endl;
  return 0;
}

i got output by trying by my own