boostライブラリの時間処理(timer,progress_timer,progress_display)

1565 ワード

1.timer
#include "stdafx.h"
#include <iostream>

#include "boost/timer.hpp"
//using namespace boost;

int _tmain(int argc, _TCHAR* argv[])
{
	boost::timer t;

	std::cout << t.elapsed_max() << std::endl; // 
	std::cout << t.elapsed_min() << std::endl; // , 
	std::cout << t.elapsed() << std::endl;	   // 
	return 0;
}

2.progress_timer
#include "stdafx.h"

#include "boost/progress.hpp"
#include "boost/static_assert.hpp"

// 
template<int N = 2>
class new_progress_timer:public boost::timer
{
public:
	new_progress_timer(std::ostream& os = std::cout)
		: m_os(os)
	{
		BOOST_STATIC_ASSERT(N >= 0 && N <= 10);
	}

	~new_progress_timer()
	{
		try
		{
			std::istream::fmtflags old_flags = m_os.setf(std::istream::fixed, std::istream::floatfield);
			std::streamsize old_prec = m_os.precision(N);

			m_os << elapsed() << " s
" << std::endl; m_os.flags(old_flags); m_os.precision(old_prec); } catch (...) { } } private: std::ostream& m_os; }; int _tmain(int argc, _TCHAR* argv[]) { new_progress_timer<10> t; ::Sleep(1010); return 0; }

3.progress_display
#include "stdafx.h"

#include "boost/progress.hpp"

int _tmain(int argc, _TCHAR* argv[])
{
	// 
	boost::progress_display t(1000);
	for (int i = 0; i < 1000; i++)
	{
		::Sleep(10);
		++t;
	}

	return 0;
}