unit1.pas

《delphi数据库设计与实例开发》随书光盘

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Label2: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Label3: TLabel;
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    Button3: TButton;
    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.Button1Click(Sender: TObject);
begin
  Edit3.Text:=FloattoStr(StrtoFloat(Edit1.Text)*StrtoInt(Edit2.Text));
  //货款总价＝商品单价×商品数据
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  Edit1.Text:=''; //将Edit1中的内容清空
  Edit2.Text:='';
  Edit3.Text:='';
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
   Form2.Show;
end;

end.