#include <iostream>

 #include <lemon/smart_graph.h>

 #include <lemon/invalid.h>

 #include <lemon/graph_reader.h>

 #include <lemon/graph_writer.h>

 using namespace lemon;

 int main() {

   SmartGraph graph;

   try {

     std::string filename="sample.lgf";

     GraphReader<SmartGraph> reader(filename,graph);

     SmartGraph::EdgeMap<int> cap(graph);

     reader.readEdgeMap("capacity",cap);

     reader.run();

     std::cout << "Hello! We have read a graph from file " << filename<< 

       " and some maps on it: now we write this to the standard output!" << 

       std::endl;

     GraphWriter<SmartGraph> writer(std::cout, graph);

     writer.writeEdgeMap("multiplicity", cap);

 //     writer.writeNode("source", s);

 //     writer.writeNode("target", t);

     writer.run();

   } catch (DataFormatError& error) {

     std::cerr << error.what() << std::endl;

   }

   return 0;

 }