u11_2_4.cpp

C++Builde5程序设计—基础教学篇程序源代码1。

//--------------  u11_2_4  ------------------------------------------------------------
#include <math.h>
#include <vcl.h>
#pragma hdrstop

#include "u11_2_4.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
Tf11_2_4 *f11_2_4;
//---------------------------------------------------------------------------
__fastcall Tf11_2_4::Tf11_2_4(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall Tf11_2_4::FormPaint(TObject *Sender)
{
  int y=0,del_y=20 ;
  Canvas->TextOut(25,y+=del_y,"x");
  Canvas->TextOut(120,y,"floor(x)");
  Canvas->TextOut(220,y,"ceil(x)");
  for(float x=-2;x<=2;x+=.5)
  {
    Canvas->TextOut(20,y+=del_y,FloatToStr(x));
    Canvas->TextOut(120,y,FloatToStr(floor(x)));
    Canvas->TextOut(220,y,FloatToStr(ceil(x)));
  }
}
//---------------------------------------------------------------------------