回复 "Timer008" 的一个类型转换的问题 - 不是很典型, 对其他人参考价值不大

问题来源: http://www.cnblogs.com/del/archive/2008/07/10/1239621.html#1250359

---

代码文件:

---

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;



type

  TForm1 = class(TForm)

    Edit1: TEdit;

    Button1: TButton;

    procedure FormCreate(Sender: TObject);

    procedure Button1Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



{初始化测试数据}

procedure TForm1.FormCreate(Sender: TObject);

begin

  Edit1.Text := '004500FF';

end;



procedure TForm1.Button1Click(Sender: TObject);

var

  a,b: Integer;

begin

  {把 Edit1 中的十六进制字符串转换成整数}

  b := StrToIntDef('$' + Edit1.Text, 0);

  {通过汇编的方式把 b 赋给 a; 这相当于 a := b;}

  asm

    mov eax, b

    mov a, eax

  end;

  {看看 a 的值}

  ShowMessage(IntToHex(a, 8)); {004500FF}

end;



end.




 
   

窗体文件:

---

object Form1: TForm1

  Left = 0

  Top = 0

  Caption = 'Form1'

  ClientHeight = 206

  ClientWidth = 339

  Color = clBtnFace

  Font.Charset = DEFAULT_CHARSET

  Font.Color = clWindowText

  Font.Height = -11

  Font.Name = 'Tahoma'

  Font.Style = []

  OldCreateOrder = False

  OnCreate = FormCreate

  PixelsPerInch = 96

  TextHeight = 13

  object Edit1: TEdit

    Left = 104

    Top = 56

    Width = 121

    Height = 21

    TabOrder = 0

    Text = 'Edit1'

  end

  object Button1: TButton

    Left = 128

    Top = 112

    Width = 75

    Height = 25

    Caption = 'Button1'

    TabOrder = 1

    OnClick = Button1Click

  end

end