unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, jpeg, ExtCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    ComboBox1: TComboBox;
    ComboBox2: TComboBox;
    Button2: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    zImage1: TImage;
    Label5: TLabel;
    Image1: TImage;
    Label1: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Panel1MouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure Image1MouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure Image1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure FormCreate(Sender: TObject);
    procedure Image1MouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
  private
    { Private declarations }
  function zhuhuan :integer;
  function shitoer:integer;
  function shitoba(aa:integer):integer;
  function shitoshilu(aa:integer):string;
  function ertoshi(aa:string):integer;
  function batoer:string;
  function shilutoer:string;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  source:integer;
  result:integer;
  b,c:integer;
  s:integer;
  yuan,hou:integer;
  d:string;
  sbx,sby,sbi,sbj,shubiao:integer;
  implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
close;
end;


procedure TForm1.Button2Click(Sender: TObject);
begin
      d:=edit1.text;
      edit2.readonly:=false;
      case combobox1.ItemIndex of
       0: yuan:=10;
       1: yuan:=2;
       2: yuan:=8;
       3: yuan:=16;
      end;
      case combobox2.ItemIndex of
       0: hou:=10;
       1: hou:=2;
       2: hou:=8;
       3: hou:=16;
      end;


      b:=length(d);
      s:=1;
      case yuan of
        10:  begin
                for c:=1 to b do
                     begin
                         case  d[c] of
                           '0':  s:=0;
                           '1':  s:=0;
                           '2':  s:=0;
                           '3':  s:=0;
                           '4':  s:=0;
                           '5':  s:=0;
                           '6':  s:=0;
                           '7':  s:=0;
                           '8':  s:=0;
                           '9':  s:=0;
                         else
                               begin
                                   s:=10;
                                   break;
                               end;
                         end;

                     end;
                 if s=10 then
                           messagedlg('輸入的數據不屬于十進制范圍.',mtwarning,[mbok],0)
                     else
                           zhuhuan;
             end;
        2:   begin
                for c:=1 to b do
                     begin
                         case  d[c] of
                           '0':  s:=0;
                           '1':  s:=0;
                          else
                               begin
                                   s:=2;
                                   break;
                               end;
                         end;
                     end;

                if s=2 then
                     messagedlg('輸入的數據不屬于二進制范圍.',mtwarning,[mbok],0)
                else
                     zhuhuan;

             end;
        8:   begin
                for c:=1 to b do
                     begin
                         case  d[c] of
                           '0':  s:=0;
                           '1':  s:=0;
                           '2':  s:=0;
                           '3':  s:=0;
                           '4':  s:=0;
                           '5':  s:=0;
                           '6':  s:=0;
                           '7':  s:=0;
                          else
                               begin
                                   s:=8;
                                   break;
                               end;
                         end;
                     end;

                if s=8then
                     messagedlg('輸入的數據不屬于八進制范圍.',mtwarning,[mbok],0)
                else
                     zhuhuan;
             end;
        16:  begin
                for c:=1 to b do
                     begin
                         case  d[c] of
                           '0':  s:=0;
                           '1':  s:=0;
                           '2':  s:=0;
                           '3':  s:=0;
                           '4':  s:=0;
                           '5':  s:=0;
                           '6':  s:=0;
                           '7':  s:=0;
                           '8':  s:=0;
                           '9':  s:=0;
                           'a':  s:=0;
                           'A':  s:=0;
                           'b':  s:=0;
                           'B':  s:=0;
                           'c':  s:=0;
                           'C':  s:=0;
                           'd':  s:=0;
                           'D':  s:=0;
                           'e':  s:=0;
                           'E':  s:=0;
                           'f':  s:=0;
                           'F':  s:=0;
                           else
                               begin
                                   s:=16;
                                   break;
                               end;
                          end;

                     end;

                if s=16 then
                     messagedlg('輸入的數據不屬于十六進制范圍.',mtwarning,[mbok],0)
                else
                     zhuhuan;
             end;
      end;

  result:=0;
end;

function  tform1.zhuhuan :integer;
begin
      if yuan<>16  then
           source:=strtoint(Edit1.text)
      else
           source:=1;
      if yuan=hou then
           begin
              messagedlg('轉換方式相同.',mtwarning,[mbok],0);
              combobox2.SetFocus;
           end
      else
           begin
              if source=0 then
                     begin
                          messagedlg('被轉換數為0，請輸入正確的值.',mtwarning,[mbok],0);
                          edit1.SetFocus;
                     end
              else
                     begin                                     
                          if (d[1]<>'0') or ((yuan=16) and (d[2]<>'0')) then
                              begin
                                   if  (yuan=10) and (hou=2)  then
                                            edit2.text:=inttostr(shitoer);
                                   if  (yuan=10) and (hou=8)  then
                                            edit2.text:=inttostr(shitoba(shitoer));
                                   if  (yuan=10) and (hou=16) then
                                            edit2.text:=shitoshilu(shitoer);
                                   if  (yuan=2)  and (hou=10) then
                                            edit2.text:=inttostr(ertoshi(edit1.Text));
                                   if  (yuan=2)  and (hou=8)  then
                                            edit2.text:=inttostr(shitoba(strtoint(edit1.text)));
                                   if  (yuan=2)  and (hou=16)  then
                                         begin
                                            source:=ertoshi(edit1.Text);
                                            edit2.text:=shitoshilu(shitoer);
                                         end;
                                   if  (yuan=8)  and (hou=10)  then
                                            edit2.text:=inttostr(ertoshi(batoer));
                                   if  (yuan=8)  and (hou=2)  then
                                            edit2.text:=batoer;
                                   if  (yuan=8)  and (hou=16)  then
                                            edit2.Text:=shitoshilu(strtoint(batoer));
                                   if  (yuan=16) and (hou=10)  then
                                            edit2.Text:=inttostr(ertoshi(shilutoer));
                                   if  (yuan=16) and (hou=2)  then
                                            edit2.Text:=shilutoer;
                                   if  (yuan=16) and (hou=8)  then
                                            edit2.Text:=inttostr(shitoba(strtoint(shilutoer)));
                               end
                           else
                                    messagedlg('第一位為0，請輸入正確的值.',mtwarning,[mbok],0);           ;
                     end;
           end;

edit2.readonly:=true;
end;

function tform1.shitoer:integer;
begin
  c:=0;
  s:=0;
  try
        if source=1 then
                 s:=1
        else
              begin
               while source<>1  do
                 begin
                    if c=0 then
                        c:=1
                    else
                        c:=c*10;
                        b:=source mod 2;
                        s:=s+b*c;
                        source:=source div 2;
                 end;

              s:=s+c*10;
             end;
  except
        on econverterror do
        messagedlg('數據類型錯誤'+#13+'請輸入正確的值',mtwarning,[mbok],0);

  end;
  result:=s;
end;
function  tform1.shitoba(aa:integer):integer;