StrEnd 获取 PChar 串未指针; StrLen 获取 PChar 串长度.
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}
//StrEnd:
procedure TForm1.Button1Click(Sender: TObject);
var
p: PChar;
str: string;
begin
str := '123456789';
p := StrEnd(PChar(str));
ShowMessage(p-3); {789}
end;
//StrLen:
procedure TForm1.Button2Click(Sender: TObject);
var
p: PChar;
i: Integer;
begin
p := '123456789';
i := StrLen(p);
ShowMessage(IntToStr(i)); {9}
i := Length(p);
ShowMessage(IntToStr(i)); {9}
end;
end.
SysUtils 单元下的公用函数目录