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unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
var
p: PChar;
begin
p := '2009';
p := CharNext(p);
ShowMessage(p); {009}
p := '博客';
p := CharNext(p);
ShowMessage(p); {客}
end;
procedure TForm1.Button2Click(Sender: TObject);
var
p,px: PChar;
begin
p := '2009';
px := CharNext(p);
px := CharNext(px);
ShowMessage(px); {09}
px := CharPrev(p, px);
px := CharPrev(p, px);
ShowMessage(px); {2009}
end;
end.
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