unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Edit1: TEdit;
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
Button5: TButton;
Button6: TButton;
Button7: TButton;
Button8: TButton;
Button9: TButton;
Button10: TButton;
Button11: TButton;
Button12: TButton;
Button13: TButton;
Button14: TButton;
Button15: TButton;
Button16: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
procedure Button5Click(Sender: TObject);
procedure Button6Click(Sender: TObject);
procedure Button7Click(Sender: TObject);
procedure Button8Click(Sender: TObject);
procedure Button9Click(Sender: TObject);
procedure Button10Click(Sender: TObject);
procedure Button11Click(Sender: TObject);
procedure Button12Click(Sender: TObject);
procedure Button13Click(Sender: TObject);
procedure Button14Click(Sender: TObject);
procedure Button15Click(Sender: TObject);
procedure Button16Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
b1,a1,a2,a3,a4: double;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'0';
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'1';
end;
procedure TForm1.Button3Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'2';
end;
procedure TForm1.Button4Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'3';
end;
procedure TForm1.Button5Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'4';
end;
procedure TForm1.Button6Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'5';
end;
procedure TForm1.Button7Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'6';
end;
procedure TForm1.Button8Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'7';
end;
procedure TForm1.Button9Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'8';
end;
procedure TForm1.Button10Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'9';
end;
procedure TForm1.Button11Click(Sender: TObject);
begin
Edit1.Text:=Edit1.Text+'.';
end;
procedure TForm1.Button12Click(Sender: TObject);
begin
a1:=strtofloat(Edit1.Text);
Edit1.Text:='';
end;
procedure TForm1.Button13Click(Sender: TObject);
begin
a2:=strtofloat(Edit1.Text);
Edit1.Text:='';
end;
procedure TForm1.Button14Click(Sender: TObject);
begin
a3:=strtofloat(Edit1.Text);
Edit1.Text:='';
end;
procedure TForm1.Button15Click(Sender: TObject);
begin
a4:=strtofloat(Edit1.Text);
Edit1.Text:='';
end;
procedure TForm1.Button16Click(Sender: TObj
ect);
begin
if a1<>0then
begin
Edit1.Text:=floattostr(a1+strtofloat(Edit1.Text));
end
if a2<>0then
begin
Edit1.Text:=floattostr(a2-strtofloat(Edit1.Text));
end
end;
end.