1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2008 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | ///\ingroup demos |
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20 | ///\file |
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21 | ///\brief LEMON style "Hello World!" program |
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22 | /// |
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23 | /// This program is intended to be a "Hello World!" program that shows |
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24 | /// the very basic notions of the LEMON library: \ref graphs "graphs" and |
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25 | /// \ref maps-page "maps". Click on the links to read more about these. |
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26 | /// |
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27 | /// \include hello_world.cc |
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28 | |
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29 | #include <iostream> |
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30 | #include <lemon/list_graph.h> |
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31 | |
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32 | using namespace lemon; |
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33 | |
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34 | typedef ListGraph::Node Node; |
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35 | typedef ListGraph::Edge Edge; |
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36 | |
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37 | |
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38 | int main() |
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39 | { |
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40 | // Declare the graph itself and a NodeMap, witch will store the characters |
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41 | // assigned to the nodes |
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42 | ListGraph graph; |
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43 | ListGraph::NodeMap<char> char_map(graph); |
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44 | |
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45 | // Add nodes |
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46 | Node new_node = graph.addNode(); |
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47 | char_map[new_node] = 'H'; |
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48 | |
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49 | // Store the start node |
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50 | Node start_node = new_node; |
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51 | |
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52 | Node from_node = new_node; |
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53 | new_node = graph.addNode(); |
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54 | char_map[new_node] = 'e'; |
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55 | |
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56 | // Here we add the first edge... |
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57 | graph.addEdge( from_node, new_node ); |
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58 | |
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59 | // ... and we add some more nodes and edges to the graph |
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60 | from_node = new_node; |
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61 | new_node = graph.addNode(); |
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62 | char_map[new_node] = 'l'; |
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63 | graph.addEdge( from_node, new_node ); |
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64 | |
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65 | from_node = new_node; |
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66 | new_node = graph.addNode(); |
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67 | char_map[new_node] = 'l'; |
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68 | graph.addEdge( from_node, new_node ); |
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69 | |
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70 | from_node = new_node; |
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71 | new_node = graph.addNode(); |
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72 | char_map[new_node] = 'o'; |
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73 | graph.addEdge( from_node, new_node ); |
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74 | |
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75 | from_node = new_node; |
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76 | new_node = graph.addNode(); |
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77 | char_map[new_node] = ' '; |
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78 | graph.addEdge( from_node, new_node ); |
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79 | |
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80 | from_node = new_node; |
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81 | new_node = graph.addNode(); |
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82 | char_map[new_node] = 'W'; |
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83 | graph.addEdge( from_node, new_node ); |
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84 | |
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85 | from_node = new_node; |
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86 | new_node = graph.addNode(); |
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87 | char_map[new_node] = 'o'; |
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88 | graph.addEdge( from_node, new_node ); |
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89 | |
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90 | from_node = new_node; |
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91 | new_node = graph.addNode(); |
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92 | char_map[new_node] = 'r'; |
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93 | graph.addEdge( from_node, new_node ); |
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94 | |
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95 | from_node = new_node; |
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96 | new_node = graph.addNode(); |
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97 | char_map[new_node] = 'l'; |
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98 | graph.addEdge( from_node, new_node ); |
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99 | |
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100 | from_node = new_node; |
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101 | new_node = graph.addNode(); |
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102 | char_map[new_node] = 'd'; |
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103 | graph.addEdge( from_node, new_node ); |
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104 | |
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105 | from_node = new_node; |
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106 | new_node = graph.addNode(); |
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107 | char_map[new_node] = '\n'; |
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108 | graph.addEdge( from_node, new_node ); |
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109 | |
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110 | |
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111 | // iterating |
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112 | Node current_node = start_node; |
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113 | while( current_node != INVALID ) |
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114 | { |
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115 | std::cout << char_map[current_node] << std::flush; |
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116 | |
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117 | ListGraph::OutEdgeIt edge(graph, current_node); |
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118 | if( edge != INVALID ) |
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119 | current_node = graph.target( edge ); |
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120 | else |
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121 | current_node = INVALID; |
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122 | } |
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123 | |
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124 | return 0; |
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125 | } |
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