unit1.pas

Delphi的函数例子

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Button1: TButton;
    Label1: TLabel;
    Label2: TLabel;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
    function Encrypt(Password: String): String;
    function OpenPurse(Password: String): String; //解密函数
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{ TForm1 }

function TForm1.Encrypt(Password: String): String;
var
  i: Integer;
  temp: Char;
begin
  For i := 0 to Length(Password) do
  begin
    temp := Password[i];
    temp := Chr(ord(temp)+1);
    Password[i]:= Temp;
  end;
  Result := Password;

end;

function TForm1.OpenPurse(Password: String): String;
var
  i: Integer;
  temp: Char;
begin
  For i := 0 to Length(Password) do
  begin
    temp := Password[i];
    temp := Chr(ord(temp)-1);
    Password[i]:= Temp;
  end;
  Result := Password;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Edit1.Text := Encrypt(Edit1.Text);
  Edit2.Text := OpenPurse(Edit1.Text);

end;

end.