COIN-OR::LEMON - Graph Library

source: lemon-0.x/demo/reader_writer_demo.cc @ 2133:b82e4d2b14ac

Last change on this file since 2133:b82e4d2b14ac was 1956:a055123339d5, checked in by Alpar Juttner, 14 years ago

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1/* -*- C++ -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library
4 *
5 * Copyright (C) 2003-2006
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
8 *
9 * Permission to use, modify and distribute this software is granted
10 * provided that this copyright notice appears in all copies. For
11 * precise terms see the accompanying LICENSE file.
12 *
13 * This software is provided "AS IS" with no warranty of any kind,
14 * express or implied, and with no claim as to its suitability for any
15 * purpose.
16 *
17 */
18
19///\ingroup demos
20///\file
21///\brief Demonstrating graph input and output
22///
23/// This simple demo program gives an example of how to read and write
24/// a graph and additional maps (on the nodes or the edges) from/to a
25/// stream.
26///
27/// \include reader_writer_demo.cc
28
29#include <iostream>
30#include <lemon/smart_graph.h>
31#include <lemon/graph_reader.h>
32#include <lemon/graph_writer.h>
33
34
35using namespace lemon;
36
37int main() {
38  SmartGraph graph;
39
40  try {
41    std::string filename="sample.lgf";
42    GraphReader<SmartGraph> reader(filename,graph);
43    SmartGraph::EdgeMap<int> cap(graph);
44    reader.readEdgeMap("capacity",cap);
45    reader.run();
46
47    std::cout << "Hello! We have read a graph from file " << filename<<
48      " and some maps on it:\n now we write it to the standard output!" <<
49      std::endl;
50
51
52    GraphWriter<SmartGraph> writer(std::cout, graph);
53    writer.writeEdgeMap("multiplicity", cap);
54    writer.run();
55     
56  } catch (DataFormatError& error) {
57    std::cerr << error.what() << std::endl;
58  }
59
60
61  return 0;
62}
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