Technical facts

Operating system(s) or programming environment(s)

Lubuntu 15.04 (vivid)

IDE(s):

Qt Creator 3.1.1

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.9.2

Libraries used:

STL: GNU ISO C++ Library, version 4.9.2

Qt project file: ./CppCreateArgv/CppCreateArgv.pro


include(../../ConsoleApplication.pri) #Or use the code below

# QT += core

# QT += gui

# greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

# CONFIG   += console

# CONFIG   -= app_bundle

# TEMPLATE = app

# CONFIG(release, debug|release) {

#   DEFINES += NDEBUG NTRACE_BILDERBIKKEL

# }

# QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++

# unix {

#   QMAKE_CXXFLAGS += -Werror

# }



include(../../Libraries/Boost.pri) #Or use the code below

# win32 {

#   INCLUDEPATH += \

#     ../../Libraries/boost_1_55_0

# }



SOURCES += main.cpp

./CppCreateArgv/main.cpp


#include <cstring>

#include <iostream>

#include <string>

#include <vector>



//Function with the same signature as main

int fake_main(int argc, char * argv[])

{

  for (int i=0; i!=argc; ++i)

  {

    std::cout << i << ": " << argv[i] << std::endl;

  }

  return 0;

}



std::pair<int,char **> CreateArgv(const std::vector<std::string>& v)

{

  typedef char* String;

  typedef String* Strings;

  const int argc = static_cast<int>(v.size());

  Strings argv = new String[argc];

  for (int i=0; i!=argc; ++i)

  {

    argv[i] = new char[v[i].size() + 1];

    std::strcpy(argv[i],&v[i][0]);

  }

  std::pair<int,char **> p = std::make_pair(argc,argv);

  return p;

}



void DeleteArgv(const std::pair<int,char **>& p)

{

  const int argc = p.first;

  for(int i = 0; i != argc; ++i)

  {

    delete[] p.second[i];

  }

  delete[] p.second;

}





int main()

{

  const std::vector<std::string> v {

    "MyMain.exe",

    "--argument_1",

    "--argument_2",

    "--argument_3",

    "--argument_4",

    "--argument_5",

    "--argument_6",

    "--argument_7"

  };

  const auto p(CreateArgv(v));

  fake_main(p.first,p.second);

  DeleteArgv(p);

}

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(C++) CreateArgv

Technical facts

Qt project file: ./CppCreateArgv/CppCreateArgv.pro

./CppCreateArgv/main.cpp