unit1.pas

邮件计费系统

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Label1: TLabel;
    Edit2: TEdit;
    Label2: TLabel;
    Edit3: TEdit;
    Label3: TLabel;
    Label4: TLabel;
    Edit4: TEdit;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  kg,qm,dj,zj:real;
begin
  kg:=strtofloat(edit1.Text);
  qm:=strtofloat(edit2.Text);
  if (qm>=0)and(qm<100) then dj:=1.8
   else if (qm>=100)and(qm<200) then dj:=1.6
       else if (qm>=200)and(qm<500)  then dj:=1.58
     else if (qm>=500)  then dj:=1.55
      else showmessage(' 输入错误 ');
      zj:=kg*dj;
     edit3.Text:=floattostr(dj);
     edit4.Text:=floattostr(zj);
end;

end.