unit1.pas

本光盘是《Delphi 7应用教程》一书的配套光盘

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Label3: TLabel;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button3Click(Sender: TObject);
begin
  Edit1.Text:=IntToStr(Random(100));//产生100以内的非负整数
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
  Edit2.Text:=IntToStr(Random(100));
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Edit3.Text:=IntToStr(StrToInt(Edit1.Text)+StrToInt(Edit2.Text));//实现加法功能
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  Edit3.Text:=IntToStr(StrToInt(Edit1.Text)*StrToInt(Edit2.Text));//实现乘法功能
end;

end.