1 | /* -*- C++ -*- |
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2 | * demo/lp_maxflow_demo.cc - Part of LEMON, a generic C++ optimization library |
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3 | * |
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4 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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5 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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6 | * |
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7 | * Permission to use, modify and distribute this software is granted |
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8 | * provided that this copyright notice appears in all copies. For |
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9 | * precise terms see the accompanying LICENSE file. |
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10 | * |
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11 | * This software is provided "AS IS" with no warranty of any kind, |
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12 | * express or implied, and with no claim as to its suitability for any |
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13 | * purpose. |
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14 | * |
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15 | */ |
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16 | |
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17 | ///\ingroup demos |
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18 | ///\file |
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19 | ///\brief LEMON style "Hello World!" program |
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20 | /// |
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21 | /// This program is intended to be a "Hello World!" program that shows |
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22 | /// the very basic notions of the LEMON library: \ref graphs "graphs" and |
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23 | /// \ref maps-page "maps". Click on the links to read more about these. |
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24 | |
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25 | #include <iostream> |
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26 | #include <lemon/list_graph.h> |
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27 | |
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28 | int main() |
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29 | { |
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30 | typedef lemon::ListGraph Graph; |
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31 | typedef Graph::EdgeIt EdgeIt; |
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32 | typedef Graph::Edge Edge; |
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33 | typedef Graph::NodeIt NodeIt; |
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34 | typedef Graph::Node Node; |
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35 | typedef Graph::EdgeMap<int> LengthMap; |
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36 | using lemon::INVALID; |
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37 | |
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38 | Graph g; |
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39 | |
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40 | Node s=g.addNode(); |
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41 | Node v2=g.addNode(); |
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42 | Node v3=g.addNode(); |
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43 | Node v4=g.addNode(); |
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44 | Node v5=g.addNode(); |
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45 | Node t=g.addNode(); |
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46 | |
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47 | Edge s_v2=g.addEdge(s, v2); |
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48 | Edge s_v3=g.addEdge(s, v3); |
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49 | Edge v2_v4=g.addEdge(v2, v4); |
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50 | Edge v2_v5=g.addEdge(v2, v5); |
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51 | Edge v3_v5=g.addEdge(v3, v5); |
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52 | Edge v4_t=g.addEdge(v4, t); |
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53 | Edge v5_t=g.addEdge(v5, t); |
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54 | |
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55 | LengthMap length(g); |
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56 | |
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57 | length.set(s_v2, 10); |
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58 | length.set(s_v3, 10); |
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59 | length.set(v2_v4, 5); |
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60 | length.set(v2_v5, 8); |
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61 | length.set(v3_v5, 5); |
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62 | length.set(v4_t, 8); |
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63 | length.set(v5_t, 8); |
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64 | |
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65 | std::cout << "Hello World!" << std::endl; |
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66 | std::cout << std::endl; |
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67 | std::cout << "This is library LEMON here! We have a graph!" << std::endl; |
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68 | std::cout << std::endl; |
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69 | |
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70 | std::cout << "Nodes:"; |
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71 | for (NodeIt i(g); i!=INVALID; ++i) |
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72 | std::cout << " " << g.id(i); |
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73 | std::cout << std::endl; |
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74 | |
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75 | std::cout << "Edges:"; |
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76 | for (EdgeIt i(g); i!=INVALID; ++i) |
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77 | std::cout << " (" << g.id(g.source(i)) << "," << g.id(g.target(i)) << ")"; |
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78 | std::cout << std::endl; |
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79 | std::cout << std::endl; |
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80 | |
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81 | std::cout << "There is a map on the edges (length)!" << std::endl; |
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82 | std::cout << std::endl; |
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83 | for (EdgeIt i(g); i!=INVALID; ++i) |
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84 | std::cout << "length(" << g.id(g.source(i)) << "," << g.id(g.target(i)) << ")="<<length[i]<<std::endl; |
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85 | |
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86 | std::cout << std::endl; |
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87 | |
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88 | } |
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