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();
         //Form4->Memo1->Lines->Add((AnsiString)"1--"+ss.str().c_str());
     }

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

     {
         //boost::progress_timer t3(ss);
         //boost::progress_timer t(ss);
         Sleep();
         //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());
 }
 //---------------------------------------------------------------------------