u11_2_3.cpp

C++Builde5程序设计—基础教学篇程序源代码1。

//--------------  u11_2_3  ------------------------------------------------------------
#include <math.h>
#include <vcl.h>
#pragma hdrstop

#include "u11_2_3.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
Tf11_2_3 *f11_2_3;
//---------------------------------------------------------------------------
__fastcall Tf11_2_3::Tf11_2_3(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall Tf11_2_3::FormPaint(TObject *Sender)
{
  const float PI=3.1415926;
  int y=0,del_y=20 ;
  Canvas->TextOut(50,y+=del_y,"x(à