Reading an XML file using boost

Support for profile reading is provided in Boost, which is: Property_tree.

Basic_ptree is the core foundation of Property_tree. Its interface is like Std::list. You can perform many basic element operations, such as Begin (), End (), and so on.

Additional operations such as Get (), Get_child (), Get_value (), data () are added to the Operation property tree.
Basic_ptree has two important internal definitions, self_type and value_type. Self_type is the type of the Basic_ptree template itself after instantiation, which is also the type of the child node. Value_type is the data structure of a node, which is an std::p air, which contains the property name (first) and the node itself (second).
The basic_ptree is usually not used, but a predefined typedef is used. Ptree, Wptree, Iptree, Wiptree. The prefix I indicates that the case is ignored, and the prefix W indicates support for wide characters.
For example: CONFIG.

<?xml version= "1.0" encoding= "Utf-8"?>
<con>
  <id>1</id>
  <name>fansy </name>
  <urls>
    <url>http://blog.csdn.net//fansongy</url>
    <url>http:/ /weibo.com//fansongy</url>
  </urls>
</con> 

I want to read its data:

#include <iostream> #include <boost/property_tree/ptree.hpp> #include <boost/property_tree/xml_
Parser.hpp> #include <boost/typeof/typeof.hpp> using namespace std;
Using namespace boost::p roperty_tree;
    int main () {Ptree pt;     Read_xml ("Conf.xml", PT);  Read in an XML file cout<< "ID is" <<pt.get<int> ("Con.id") <<endl;  Read the information in the node cout<< "Try Default" <<pt.get<int> ("Con.no_prop", +) <<endl;    If not, the default value of Ptree child = Pt.get_child ("con") is used;    Take a child node cout<< "name is:" <<child.get<string> ("name") <<endl;
    Sub-node operation, in fact, as above the operation of child = Pt.get_child ("Con.urls"); For (Boost_auto (Pos,child.begin ());p OS! = Child.end (); ++pos)//boost in AUTO {cout<< "\ T" +pos->second
     . Data () <<endl;    } pt.put ("Con.name", "Sword"); Change a key value Pt.add ("Con.urls.url", http://www.baidu.com);    Add a key value Write_xml ("Conf.xml", PT);
   Writes XML GetChar (); return 0;
 }

The operation is displayed as:
ID is 1
Try Default100
name Is:fansy
        http://blog.csdn.net//fansongy
        http://weibo.com// Fansongy

Config:
<?xml version= "1.0" encoding= "Utf-8"?>
<con>
  <id>1</id>
  <name>Sword</name>
<urls>
     <url>http://blog.csdn.net//fansongy</url>
     <url>http://weibo.com//fansongy</url>
     <url>http://www.baidu.com</url>
</urls>
</con> 

this blog from the Asura Road, reproduced please indicate the source: http://blog.csdn.net/fansongy/article/details/9026407