SysUtils.StrLCopy、SysUtils.StrPCopy、SysUtils.StrPLCopy

StrLCopy 只是比 StrCopy 多了一个限制长度的参数; StrPCopy 等价于 StrCopy; StrPLCopy 等价于 StrLCopy.

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unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs;



type

  TForm1 = class(TForm)

    procedure FormCreate(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



procedure TForm1.FormCreate(Sender: TObject);

var

  p: PChar;

begin

  p := PChar(StringOfChar(#0, 9));



  StrCopy(p, '123456789');

  ShowMessage(p);              {123456789}



  StrLCopy(p, '123456789', 3);

  ShowMessage(p);              {123}



  StrPCopy(p, '123456789');

  ShowMessage(p);              {123456789}



  StrPLCopy(p, '123456789', 3);

  ShowMessage(p);              {123}

end;



end.


 
   

SysUtils 单元下的公用函数目录

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