unit1.~pas

一个简单计算器代码 用Delphi编的……大家看看

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    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;
    Button17: TButton;
    Edit1: TEdit;
    procedure Button13Click(Sender: TObject);
    procedure Button14Click(Sender: TObject);
    procedure Button15Click(Sender: TObject);
    procedure Button12Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button11Click(Sender: TObject);
    procedure Button8Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button10Click(Sender: TObject);
    procedure Button16Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
    procedure Button17Click(Sender: TObject);
    procedure Button7Click(Sender: TObject);
    procedure Button9Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  a,b,c,d: Real;
  m:char;

implementation

{$R *.dfm}

procedure TForm1.Button13Click(Sender: TObject);
begin
edit1.text:=edit1.text+'1';
end;

procedure TForm1.Button14Click(Sender: TObject);
begin
edit1.text:=edit1.text+'2';
end;

procedure TForm1.Button15Click(Sender: TObject);
begin
edit1.text:=edit1.text+'3';
end;

procedure TForm1.Button12Click(Sender: TObject);
begin
edit1.text:=edit1.text+'4';
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
edit1.text:=edit1.text+'5';
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
edit1.text:=edit1.text+'6';
end;

procedure TForm1.Button11Click(Sender: TObject);
begin
edit1.text:=edit1.text+'7';
end;

procedure TForm1.Button8Click(Sender: TObject);
begin
edit1.text:=edit1.text+'8';
end;

procedure TForm1.Button5Click(Sender: TObject);
begin
edit1.text:=edit1.text+'9';
end;

procedure TForm1.Button10Click(Sender: TObject);
begin
edit1.text:=edit1.text+'0';
end;

procedure TForm1.Button16Click(Sender: TObject);
begin
a:=StrToFloat(edit1.text);
edit1.text:='';
m:='+';
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
a:=StrToFloat(edit1.text);
edit1.text:='';
m:='-';
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
a:=StrToFloat(edit1.text);
edit1.text:='';
m:='*';
end;

procedure TForm1.Button6Click(Sender: TObject);
begin
a:=StrToFloat(edit1.text);
edit1.text:='';
m:='/';
end;

procedure TForm1.Button17Click(Sender: TObject);
begin
edit1.text:='';
end;

procedure TForm1.Button7Click(Sender: TObject);
begin
b:=StrToFloat(edit1.text);
if m='+' then c:=a+b;
if m='-' then c:=a-b;
if m='*' then c:=a*b;
if m='/' then c:=a/b;
edit1.text:=FloatToStr(c);
end;

procedure TForm1.Button9Click(Sender: TObject);
begin
edit1.text:=edit1.text+'.';
end;

end.