text: //  (C) Copyright Gennadiy Rozental 2001-2008.
  //  Distributed under the Boost Software License, Version 1.0.
  //  (See accompanying file LICENSE_1_0.txt or copy at 
  //  http://www.boost.org/LICENSE_1_0.txt)
  
  //  See http://www.boost.org/libs/test for the library home page.
  
  // Boost.Runtime.Param
  #include <boost/test/utils/runtime/env/variable.hpp>
  #include <boost/test/utils/basic_cstring/io.hpp>
  
  namespace rt  = boost::runtime;
  namespace env = boost::runtime::env;
  
  // STL
  #include <iostream>
  
  int main() {
      std::cout << env::get<int>("NUMBER_OF_PROCESSORS") << '\n' << env::get<rt::cstring>("TEMP") << std::endl;
  
      boost::optional<int> n;
  
      env::get( "NUMBER_OF_PROCESSORS", n );
  
      if( n )
          std::cout << n << std::endl;
  
      return 0;
  }
  
  // EOF
  
  