u6_4_2.cpp

《C++ Builder 5程序设计——基础教学篇》程序源代码2.

//-------------  u6_4_2  --------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "u6_4_2.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
Tf6_4_2 *f6_4_2;
//---------------------------------------------------------------------------
__fastcall Tf6_4_2::Tf6_4_2(TComponent* Owner)
    : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall Tf6_4_2::cmdComputeClick(TObject *Sender)
{
  int factorial=1,k=1,n;
  n=StrToInt(txtNum->Text);
  while(k<=n)
  {
    factorial*=k;
    k++;
  }
   lblResult->Caption=IntToStr(factorial);
}
//---------------------------------------------------------------------------

void __fastcall Tf6_4_2::cmdEndClick(TObject *Sender)
{
  Close();    
}
//---------------------------------------------------------------------------