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      Delphi 2010ֻʣÏÂÁùÌìµÄÊÔÓÃÆÚÁË,15ÌìµÄÊÔÓÃÆÚ¹ýµÃÕæ¿ì.°Ù¶ÈÁ˺ܾÃÒ²ÒÀ¾ÉδËÑË÷µ½ÆÆ½â²¹¶¡,¿´À´Õâ°æ±¾µÄ·ÀµÁ°æ¹¤×÷×öµÃȷʵ²»´í.ÎÞÄÎÖ®ÏÂÖ»ºÃ×Ô¼º¶ÔËü×ö×öÊÖ½ÅÁË.
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Delphi ¾¿¾¹²úÉúÁ˼¸¸öString¶ÔÏóµÄÎÊÌâ

¼¼Êõ½»Á÷,DH½²½â. Õâ¸öÊÇÔÚCSDNÉÏÃæ¿´¼ûµÄÎÊÌâ.ÎÒ˵˵×Ô¼ºµÄÏë·¨. procedure TForm1.btn1Click(Sender: TObject);
var
Str:String;
begin
Str:='abc' ;

Str:=str+'d';

str:=copy(Str,1,3);

str:=UpperCase(str);
end;
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Delphi CRC32УÑé

ÍøÉÏDownµÄÒ»¸öµ¥Ôª.×Ô¼º¸ÄÁËÏÂ. unit utCRC32;
interface
uses
Windows,SysUtils,Classes;
const //Crc32±í
Crc32Tab: Array[0..$FF] of LongInt =
($00000000, $77073096, $ee0e612c, $990951ba, $076dc419, $706af48f,
$e963a535, $9e6495a3, $0edb8832, $79dcb8a4, $e0d5e91e, $97d2d988,
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