demo/arg_parser_demo.cc
author Peter Kovacs <kpeter@inf.elte.hu>
Tue, 24 Mar 2009 00:18:25 +0100
changeset 604 8c3112a66878
parent 311 c887e703b566
child 842 c2ff0a365245
permissions -rw-r--r--
Use XTI implementation instead of ATI in NetworkSimplex (#234)

XTI (eXtended Threaded Index) is an imporved version of the widely
known ATI (Augmented Threaded Index) method for storing and updating
the spanning tree structure in Network Simplex algorithms.

In the ATI data structure three indices are stored for each node:
predecessor, thread and depth. In the XTI data structure depth is
replaced by the number of successors and the last successor
(according to the thread index).
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/* -*- mode: C++; indent-tabs-mode: nil; -*-
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 *
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 * This file is a part of LEMON, a generic C++ optimization library.
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 *
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 * Copyright (C) 2003-2009
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 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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 *
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 * Permission to use, modify and distribute this software is granted
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 * provided that this copyright notice appears in all copies. For
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 * precise terms see the accompanying LICENSE file.
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 *
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 * This software is provided "AS IS" with no warranty of any kind,
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 * express or implied, and with no claim as to its suitability for any
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 * purpose.
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 *
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 */
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///\ingroup demos
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///\file
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///\brief Argument parser demo
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///
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/// This example shows how the argument parser can be used.
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///
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/// \include arg_parser_demo.cc
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#include <lemon/arg_parser.h>
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using namespace lemon;
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int main(int argc, char **argv)
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{
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  // Initialize the argument parser
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  ArgParser ap(argc, argv);
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  int i;
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  std::string s;
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  double d = 1.0;
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  bool b, nh;
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  bool g1, g2, g3;
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  // Add a mandatory integer option with storage reference
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  ap.refOption("n", "An integer input.", i, true);
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  // Add a double option with storage reference (the default value is 1.0)
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  ap.refOption("val", "A double input.", d);
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  // Add a double option without storage reference (the default value is 3.14)
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  ap.doubleOption("val2", "A double input.", 3.14);
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  // Set synonym for -val option
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  ap.synonym("vals", "val");
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  // Add a string option
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  ap.refOption("name", "A string input.", s);
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  // Add bool options
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  ap.refOption("f", "A switch.", b)
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    .refOption("nohelp", "", nh)
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    .refOption("gra", "Choice A", g1)
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    .refOption("grb", "Choice B", g2)
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    .refOption("grc", "Choice C", g3);
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  // Bundle -gr* options into a group
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  ap.optionGroup("gr", "gra")
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    .optionGroup("gr", "grb")
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    .optionGroup("gr", "grc");
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  // Set the group mandatory
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  ap.mandatoryGroup("gr");
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  // Set the options of the group exclusive (only one option can be given)
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  ap.onlyOneGroup("gr");
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  // Add non-parsed arguments (e.g. input files)
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  ap.other("infile", "The input file.")
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    .other("...");
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  // Perform the parsing process
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  // (in case of any error it terminates the program)
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  ap.parse();
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  // Check each option if it has been given and print its value
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  std::cout << "Parameters of '" << ap.commandName() << "':\n";
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  std::cout << "  Value of -n: " << i << std::endl;
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  if(ap.given("val")) std::cout << "  Value of -val: " << d << std::endl;
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  if(ap.given("val2")) {
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    d = ap["val2"];
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    std::cout << "  Value of -val2: " << d << std::endl;
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  }
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  if(ap.given("name")) std::cout << "  Value of -name: " << s << std::endl;
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  if(ap.given("f")) std::cout << "  -f is given\n";
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  if(ap.given("nohelp")) std::cout << "  Value of -nohelp: " << nh << std::endl;
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  if(ap.given("gra")) std::cout << "  -gra is given\n";
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  if(ap.given("grb")) std::cout << "  -grb is given\n";
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  if(ap.given("grc")) std::cout << "  -grc is given\n";
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  switch(ap.files().size()) {
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  case 0:
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    std::cout << "  No file argument was given.\n";
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    break;
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  case 1:
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    std::cout << "  1 file argument was given. It is:\n";
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    break;
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  default:
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    std::cout << "  "
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              << ap.files().size() << " file arguments were given. They are:\n";
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  }
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  for(unsigned int i=0;i<ap.files().size();++i)
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    std::cout << "    '" << ap.files()[i] << "'\n";
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  return 0;
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}