Delphi 计算器

 计算器V1:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Label7: TLabel;
    Label9: TLabel;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    Button6: TButton;
    Button7: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button7Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
Var
     temp1,temp2,result:Integer;
begin
     temp1:=strtoint(Edit1.Text);
     temp2:=strtoint(Edit2.Text);
     result:=temp1+temp2;
     Edit3.Text:=inttostr(result);
end;

procedure TForm1.Button7Click(Sender: TObject);
begin
    Edit1.Text:='';
    Edit2.Text:='';
    Edit3.Text:='';
end;

procedure TForm1.Button2Click(Sender: TObject);
Var
     temp1,temp2,result:Integer;
begin
     temp1:=strtoint(Edit1.Text);
     temp2:=strtoint(Edit2.Text);
     result:=temp1-temp2;
     Edit3.Text:=inttostr(result);
end;

procedure TForm1.Button3Click(Sender: TObject);
Var
     temp1,temp2,result:Integer;
begin
     temp1:=strtoint(Edit1.Text);
     temp2:=strtoint(Edit2.Text);
     result:=temp1*temp2;
     Edit3.Text:=inttostr(result);
end;

procedure TForm1.Button4Click(Sender: TObject);
Var
     temp1,temp2,result:Integer;
begin
     temp1:=strtoint(Edit1.Text);
     temp2:=strtoint(Edit2.Text);
     result:=(temp1) div (temp2);
     Edit3.Text:=inttostr(result);
end;

procedure TForm1.Button5Click(Sender: TObject);
Var
     temp1,temp2,result:Integer;
begin
     temp1:=strtoint(Edit1.Text);
     temp2:=strtoint(Edit2.Text);
     result:=(temp1) and (temp2);
     Edit3.Text:=inttostr(result);
end;

procedure TForm1.Button6Click(Sender: TObject);
Var
     temp1,temp2,result:Integer;
begin
     temp1:=strtoint(Edit1.Text);

     result:=Not (temp1) ;
     Edit3.Text:=inttostr(result);
end;

end.

 界面如下图所示：

 

计算器V2: