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kpeter (Peter Kovacs)
kpeter@inf.elte.hu
lgf_demo.cc is merged with reader_writer_demo.cc (from SVN -r3501)
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1 file changed with 17 insertions and 13 deletions:
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///
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/// This program gives an example of how to load a directed graph from
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/// an \ref lgf-format "LGF" file with the \ref lemon::DigraphReader
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/// "DigraphReader" class.
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/// This program gives an example of how to read and write a digraph
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/// and additional maps from/to a stream or a file using the 
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/// \ref lgf-format "LGF" format.
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///
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///
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/// And the program which reads it:
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/// And the program which reads it and prints the digraph to the
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/// standard output:
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/// \include lgf_demo.cc
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#include <lemon/lgf_writer.h>
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#include <lemon/random.h>
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  SmartDigraph::Node s, t;
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  try {
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    digraphReader("digraph.lgf", g). // read the directed graph into g
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      arcMap("capacity", cap).       // read the 'capacity' arc map into cap
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      node("source", s).             // read 'source' node to s
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      node("target", t).             // read 'target' node to t
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      run();
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  } catch (DataFormatError& error) { // check if there was any error
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    std::cerr << "Error: " << error.what() << std::endl;
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    return -1;
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  }
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  digraphReader("digraph.lgf", g). // read the directeg graph into g
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    arcMap("capacity", cap).       // read the 'capacity' arc map into cap
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    node("source", s).             // read 'source' node to s
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    node("target", t).             // read 'target' node to t
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    run();
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  std::cout << "Digraph read from 'digraph.lgf'" << std::endl;
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  std::cout << "A digraph is read from 'digraph.lgf'." << std::endl;
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  std::cout << "Number of nodes: " << countNodes(g) << std::endl;
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