COIN-OR::LEMON - Graph Library

source: lemon-0.x/demo/reader_writer_demo.cc @ 1583:2b329fd595ef

Last change on this file since 1583:2b329fd595ef was 1583:2b329fd595ef, checked in by athos, 14 years ago

Documented some more demo programs.

File size: 1.6 KB
Line 
1/* -*- C++ -*-
2 * demo/lp_maxflow_demo.cc - Part of LEMON, a generic C++ optimization library
3 *
4 * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
5 * (Egervary Research Group on Combinatorial Optimization, EGRES).
6 *
7 * Permission to use, modify and distribute this software is granted
8 * provided that this copyright notice appears in all copies. For
9 * precise terms see the accompanying LICENSE file.
10 *
11 * This software is provided "AS IS" with no warranty of any kind,
12 * express or implied, and with no claim as to its suitability for any
13 * purpose.
14 *
15 */
16
17///\ingroup demos
18///\file
19///\brief Demonstrating graph input and output
20///
21/// This simple demo program gives an example of how to read and write
22/// a graph and additional maps (on the nodes or the edges) from/to a
23/// stream.
24
25
26#include <iostream>
27#include <lemon/smart_graph.h>
28#include <lemon/invalid.h>
29#include <lemon/graph_reader.h>
30#include <lemon/graph_writer.h>
31
32
33using namespace lemon;
34
35int main() {
36  SmartGraph graph;
37
38  try {
39    std::string filename="sample.lgf";
40    GraphReader<SmartGraph> reader(filename,graph);
41    SmartGraph::EdgeMap<int> cap(graph);
42    reader.readEdgeMap("capacity",cap);
43    reader.run();
44
45    std::cout << "Hello! We have read a graph from file " << filename<<
46      " and some maps on it:\n now we write it to the standard output!" <<
47      std::endl;
48
49
50    GraphWriter<SmartGraph> writer(std::cout, graph);
51    writer.writeEdgeMap("multiplicity", cap);
52    writer.run();
53     
54  } catch (DataFormatError& error) {
55    std::cerr << error.what() << std::endl;
56  }
57
58
59  return 0;
60}
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