demo/arg_parser_demo.cc
author Peter Kovacs <kpeter@inf.elte.hu>
Fri, 17 Apr 2009 18:04:36 +0200
changeset 609 e6927fe719e6
parent 311 c887e703b566
child 842 c2ff0a365245
permissions -rw-r--r--
Support >= and <= constraints in NetworkSimplex (#219, #234)

By default the same inequality constraints are supported as by
Circulation (the GEQ form), but the LEQ form can also be selected
using the problemType() function.

The documentation of the min. cost flow module is reworked and
extended with important notes and explanations about the different
variants of the problem and about the dual solution and optimality
conditions.
alpar@209
     1
/* -*- mode: C++; indent-tabs-mode: nil; -*-
alpar@85
     2
 *
alpar@209
     3
 * This file is a part of LEMON, a generic C++ optimization library.
alpar@85
     4
 *
alpar@440
     5
 * Copyright (C) 2003-2009
alpar@85
     6
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@85
     7
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
alpar@85
     8
 *
alpar@85
     9
 * Permission to use, modify and distribute this software is granted
alpar@85
    10
 * provided that this copyright notice appears in all copies. For
alpar@85
    11
 * precise terms see the accompanying LICENSE file.
alpar@85
    12
 *
alpar@85
    13
 * This software is provided "AS IS" with no warranty of any kind,
alpar@85
    14
 * express or implied, and with no claim as to its suitability for any
alpar@85
    15
 * purpose.
alpar@85
    16
 *
alpar@85
    17
 */
alpar@85
    18
alpar@85
    19
///\ingroup demos
alpar@85
    20
///\file
alpar@85
    21
///\brief Argument parser demo
alpar@85
    22
///
kpeter@88
    23
/// This example shows how the argument parser can be used.
alpar@85
    24
///
kpeter@88
    25
/// \include arg_parser_demo.cc
alpar@85
    26
alpar@85
    27
#include <lemon/arg_parser.h>
alpar@85
    28
alpar@85
    29
using namespace lemon;
ladanyi@311
    30
int main(int argc, char **argv)
alpar@85
    31
{
kpeter@204
    32
  // Initialize the argument parser
kpeter@204
    33
  ArgParser ap(argc, argv);
alpar@85
    34
  int i;
alpar@85
    35
  std::string s;
kpeter@204
    36
  double d = 1.0;
kpeter@204
    37
  bool b, nh;
kpeter@204
    38
  bool g1, g2, g3;
kpeter@204
    39
kpeter@204
    40
  // Add a mandatory integer option with storage reference
kpeter@204
    41
  ap.refOption("n", "An integer input.", i, true);
kpeter@204
    42
  // Add a double option with storage reference (the default value is 1.0)
kpeter@204
    43
  ap.refOption("val", "A double input.", d);
kpeter@204
    44
  // Add a double option without storage reference (the default value is 3.14)
kpeter@204
    45
  ap.doubleOption("val2", "A double input.", 3.14);
kpeter@204
    46
  // Set synonym for -val option
kpeter@204
    47
  ap.synonym("vals", "val");
kpeter@204
    48
  // Add a string option
kpeter@204
    49
  ap.refOption("name", "A string input.", s);
kpeter@204
    50
  // Add bool options
kpeter@204
    51
  ap.refOption("f", "A switch.", b)
kpeter@204
    52
    .refOption("nohelp", "", nh)
kpeter@204
    53
    .refOption("gra", "Choice A", g1)
kpeter@204
    54
    .refOption("grb", "Choice B", g2)
kpeter@204
    55
    .refOption("grc", "Choice C", g3);
kpeter@204
    56
  // Bundle -gr* options into a group
kpeter@204
    57
  ap.optionGroup("gr", "gra")
kpeter@204
    58
    .optionGroup("gr", "grb")
kpeter@204
    59
    .optionGroup("gr", "grc");
kpeter@204
    60
  // Set the group mandatory
kpeter@204
    61
  ap.mandatoryGroup("gr");
kpeter@204
    62
  // Set the options of the group exclusive (only one option can be given)
kpeter@204
    63
  ap.onlyOneGroup("gr");
kpeter@204
    64
  // Add non-parsed arguments (e.g. input files)
kpeter@204
    65
  ap.other("infile", "The input file.")
alpar@85
    66
    .other("...");
alpar@209
    67
kpeter@204
    68
  // Perform the parsing process
kpeter@204
    69
  // (in case of any error it terminates the program)
alpar@85
    70
  ap.parse();
alpar@85
    71
kpeter@204
    72
  // Check each option if it has been given and print its value
alpar@85
    73
  std::cout << "Parameters of '" << ap.commandName() << "':\n";
alpar@85
    74
kpeter@204
    75
  std::cout << "  Value of -n: " << i << std::endl;
alpar@85
    76
  if(ap.given("val")) std::cout << "  Value of -val: " << d << std::endl;
kpeter@204
    77
  if(ap.given("val2")) {
kpeter@204
    78
    d = ap["val2"];
kpeter@204
    79
    std::cout << "  Value of -val2: " << d << std::endl;
kpeter@204
    80
  }
alpar@85
    81
  if(ap.given("name")) std::cout << "  Value of -name: " << s << std::endl;
alpar@85
    82
  if(ap.given("f")) std::cout << "  -f is given\n";
kpeter@204
    83
  if(ap.given("nohelp")) std::cout << "  Value of -nohelp: " << nh << std::endl;
kpeter@88
    84
  if(ap.given("gra")) std::cout << "  -gra is given\n";
kpeter@88
    85
  if(ap.given("grb")) std::cout << "  -grb is given\n";
kpeter@88
    86
  if(ap.given("grc")) std::cout << "  -grc is given\n";
alpar@209
    87
alpar@85
    88
  switch(ap.files().size()) {
alpar@85
    89
  case 0:
alpar@85
    90
    std::cout << "  No file argument was given.\n";
alpar@85
    91
    break;
alpar@85
    92
  case 1:
alpar@85
    93
    std::cout << "  1 file argument was given. It is:\n";
alpar@85
    94
    break;
alpar@85
    95
  default:
alpar@85
    96
    std::cout << "  "
alpar@209
    97
              << ap.files().size() << " file arguments were given. They are:\n";
alpar@85
    98
  }
alpar@85
    99
  for(unsigned int i=0;i<ap.files().size();++i)
alpar@85
   100
    std::cout << "    '" << ap.files()[i] << "'\n";
alpar@209
   101
kpeter@204
   102
  return 0;
alpar@85
   103
}