#include <iostream>
#include <boost/date_time/posix_time/posix_time_types.hpp>
#include  <boost/date_time/posix_time/time_formatters_limited.hpp>

class	Crun_time 
{
public:
  
  Crun_time(const char* function_name="Unknown")
  {
    m_creation_time = boost::posix_time::microsec_clock::local_time();
  }
  ~Crun_time() 
  {

    std::cout << to_simple_string(boost::posix_time::microsec_clock::local_time() - m_creation_time) << std::endl;
  }
private:
  boost::posix_time::ptime	m_creation_time;
};