秒表程序有关问题

秒表程序问题
秒表程序，问题是刚开始运行时，Label1总是显示当前时间，怎么能让它一开始显示0，点Start后才开始计时呢？





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

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
TDateTime Last,Start;
//---------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
  : TForm(Owner)
{
}
//---------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  if(Button1->Caption == "Start")
  {
  Last= 0;
  Timer1->Enabled=true;
  Start=Now();
  Button1->Caption="End";
  }
  else if (Button1->Caption=="End")
  {
  Last= Now()-Start + Last;
  Timer1->Enabled=false;
  Button1->Caption="goon";
  }
  else if (Button1->Caption=="goon")
  {
  Start=Now();
  Timer1->Enabled=true;
  Button1->Caption="End";
  }
}
//---------------------------------------
void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
  Label1->Caption=FormatDateTime("hh:nn:ss:zzz",Now()-Start + Last);
}
//---------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
  Timer1->Enabled=false;
  Label1->Caption=" ";
  Button1->Caption="Start";
}
//---------------------------------------


[解决办法]
void __fastcall TForm1::Button1Click(TObject *Sender)
{
if(Button1->Caption == "Start")
{
Last= 0;
m_nClick = 0;
Timer1->Enabled=true;
Start=Now();
Button1->Caption="End";
}
...
}
void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
Label1->Caption=m_nClick++;
}
[解决办法]
[code=C/C++]
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
Timer1-> Enabled=false;
Label1-> Caption=0;
}
[/code]

初始化时赋值为零
[解决办法]
同上面的
[解决办法]
[Quote=引用:]

C/C++ code

__fastcall   TForm1::TForm1(TComponent*   Owner)    :   TForm(Owner){        Timer1-> Enabled=false;        Label1-> Caption=0;}