c++ boost--------------boost::progress_timer小试。

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit4.h"
#include <boost/progress.hpp>
#include <sstream>
using  namespace std;
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm4 *Form4;
//---------------------------------------------------------------------------
__fastcall TForm4::TForm4(TComponent* Owner)
    : TForm(Owner)
{
}

void test_timer(std::stringstream& ss)
{
    ss.clear();
    boost::progress_timer t(ss);

    {
        //boost::progress_timer t1(ss);
        Sleep(1000);
        //Form4->Memo1->Lines->Add((AnsiString)"1--"+ss.str().c_str());
    }

    {
        //boost::progress_timer t2(ss);
        //boost::progress_timer t(ss);
        Sleep(2001);
        //Form4->Memo1->Lines->Add((AnsiString)"2--"+ss.str().c_str());
    }

    {
        //boost::progress_timer t3(ss);
        //boost::progress_timer t(ss);
        Sleep(3002);
        //Form4->Memo1->Lines->Add((AnsiString)"3--"+ss.str().c_str());
    }
}


//---------------------------------------------------------------------------
void __fastcall TForm4::Button1Click(TObject *Sender)
{
    std::stringstream ss;
     test_timer(ss);
    this->Memo1->Lines->Add(ss.str().c_str());
}
//---------------------------------------------------------------------------