Aplikasi kalkulator sederhana dengan delphi 7

Langsung saja ini tampilan interfacenya,,,

 

komponen yang digunakan adalah :

1.label
2.edit
3.combobox
4.button
5.image

ini souce codenya..


unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    ComboBox1: TComboBox;
    Edit3: TEdit;
    XPManifest1: TXPManifest;
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Button3: TButton;
    procedure ComboBox1Change(Sender: TObject);
    procedure Edit2KeyPress(Sender: TObject; var Key: Char);
    procedure Edit1KeyPress(Sender: TObject; var Key: Char);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

uses Unit2;

{$R *.dfm}

procedure TForm1.ComboBox1Change(Sender: TObject);
var
  a,b,c:Real;
begin
 a:=StrToFloat(Edit1.Text);
 b:=StrToFloat(Edit2.text);
 if ComboBox1.Text= '+'then
 c:=a+b
 else if ComboBox1.Text= '-' then
 c:=a-b
 else if ComboBox1.Text= '*' then
 c:=a*b
 else if ComboBox1.Text= '/' then
 c:=a/b;
 Edit3.Text:=FloatToStr(c);

end;

procedure TForm1.Edit2KeyPress(Sender: TObject; var Key: Char);
begin
  if Key= #13 then
  ComboBox1.SetFocus;
end;

procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
  if Key= #13 then
  Edit2.SetFocus;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if MessageDlg('apkah anda ingin mereset?',mtConfirmation,[mbYes,mbNo],32)=mryes
  then
  Edit1.Text:=' ';
  Edit2.Text:=' ';
  Edit3.Text:=' ';
  ComboBox1.Text:=' ';
  end;
procedure TForm1.Button2Click(Sender: TObject);
begin
  if MessageDlg('apakah anda yakin ingin keluar?',mtWarning,[mbYes,mbNo],0)=mryes then Close;
  end;

procedure TForm1.Button3Click(Sender: TObject);
begin
Form1.Hide;
form2.show;
end;

end.


unit Unit2;

interface

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

type
  TForm2 = class(TForm)
    Label1: TLabel;
    Button1: TButton;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    Image1: TImage;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

uses Unit1;

{$R *.dfm}

procedure TForm2.Button1Click(Sender: TObject);
begin
Form2.Close;
form1.show;
end;

procedure TForm2.Button2Click(Sender: TObject);
begin
  if MessageDlg('Panjenengan leres pengen medal ?',mtWarning,[mbYes,mbNo],0)= mryes
  then
Form2.Close;
Form1.Close;
end;

end.