///\brief Demonstrating graph input and output

 ///\brief Demonstrating graph input and output

 ///

 ///

 /// This simple demo program gives an example of how to read and write

 /// This simple demo program gives an example of how to read and write

 /// a graph and additional maps (on the nodes or the edges) from/to a

 /// a graph and additional maps (on the nodes or the edges) from/to a

 /// stream. 

 /// stream. 

 #include <iostream>

 #include <iostream>

 #include <lemon/smart_graph.h>

 #include <lemon/smart_graph.h>

 #include <lemon/graph_reader.h>

 #include <lemon/graph_reader.h>

 #include <lemon/graph_writer.h>

 #include <lemon/graph_writer.h>