#includeIn this example, we create a new parent node and add a child node to it containing information about a person's name and age. We then use the Boost library's xml_writer_settings and write_xml functions to output the parent node with its child in an XML format. Therefore, the package library used in this code example is the Boost library's property tree package.#include using boost::property_tree::ptree; int main() { // create a new parent node ptree parent; // add a child node to the parent node ptree child; child.put("name", "John"); child.put("age", 25); parent.add_child("person", child); // print out the parent node and its child boost::property_tree::xml_writer_settings settings('\t', 1); write_xml(std::cout, parent, settings); return 0; }