demo/reader_writer_demo.cc
author deba
Wed, 14 Nov 2007 15:36:37 +0000
changeset 2510 bb523a4758f7
parent 2391 14a343be7a5a
child 2553 bfced05fa852
permissions -rw-r--r--
removing semicolon ftom the end of GRAPH_TYPEDEFS
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/* -*- C++ -*-
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 *
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 * This file is a part of LEMON, a generic C++ optimization library
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 *
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 * Copyright (C) 2003-2007
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 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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 *
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 * Permission to use, modify and distribute this software is granted
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 * provided that this copyright notice appears in all copies. For
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 * precise terms see the accompanying LICENSE file.
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 *
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 * This software is provided "AS IS" with no warranty of any kind,
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 * express or implied, and with no claim as to its suitability for any
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 * purpose.
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 *
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 */
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///\ingroup demos
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///\file
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///\brief Demonstrating graph input and output
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///
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/// This simple demo program gives an example of how to read and write
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/// a graph and additional maps (on the nodes or the edges) from/to a
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/// stream. 
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///
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/// \include reader_writer_demo.cc
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#include <iostream>
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#include <lemon/smart_graph.h>
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#include <lemon/graph_reader.h>
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#include <lemon/graph_writer.h>
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using namespace lemon;
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int main() {
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  SmartGraph graph;
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  try {
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    std::string filename="sample.lgf";
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    std::string name;
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    GraphReader<SmartGraph> reader(filename,graph);
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    SmartGraph::EdgeMap<int> cap(graph);
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    reader.readEdgeMap("capacity",cap);
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    reader.readAttribute("name",name);
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    reader.run();
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    std::cout << "Hello! We have read a graph from file " << filename<< 
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      " and some maps on it:\n now we write it to the standard output!" << 
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      std::endl;
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    GraphWriter<SmartGraph> writer(std::cout, graph);
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    writer.writeEdgeMap("multiplicity", cap);
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    writer.writeAttribute("name",name);
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    writer.run();
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  } catch (DataFormatError& error) {
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    std::cerr << error.what() << std::endl;
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  }
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  return 0;
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}