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function ValidatePID(const APID: string): string;
{ÄÚ²¿º¯Êý,È¡Éí·ÝÖ¤ºÅУÑéλ,×îºóһλ,¶Ô18λÓÐЧ}
function GetVerifyBit(sIdentityNum: string): Char;
var
    nNum: Integer;
begin
    Result := #0;
    nNum := StrToInt(sIdentityNum[1]) * 7 +
            StrToInt(sIdentityNum[2]) * 9 +
            StrToInt(sIdentityNum[3]) * 10 +
            StrToInt(sIdentityNum[4]) * 5 +
            StrToInt(sIdentityNum[5]) * 8 +
            StrToInt(sIdentityNum[6]) * 4 +
            StrToInt(sIdentityNum[7]) * 2 +
            StrToInt(sIdentityNum[8]) * 1 +
            StrToInt(sIdentityNum[9]) * 6 +
            StrToInt(sIdentityNum[10]) * 3 +
            StrToInt(sIdentityNum[11]) * 7 +
            StrToInt(sIdentityNum[12]) * 9 +
            StrToInt(sIdentityNum[13]) * 10 +
            StrToInt(sIdentityNum[14]) * 5 +
            StrToInt(sIdentityNum[15]) * 8 +
            StrToInt(sIdentityNum[16]) * 4 +
            StrToInt(sIdentityNum[17]) * 2;
    nNum := nNum mod 11;
    case nNum of
   &n


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var pSource,pDest:PChar;
     len: integer;
.......................//һЩ´úÂë
Move(pSource,pDest,len); //´íÎó
Move(pSource^,pDest^,len); //ÕýÈ·
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procedure copyfile(sourcefilename,targetfilename : String);
var f1, f2: tfilestream;
begin
 f1 := tfilestream.Create(sourcefilename, fmopenread);
 try
   f2 := tfilestream ......

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var
  s:string;
  p:pchar;
  a:array[1..20] of char;
ÄÇôÈýÕßÖ®¼äµÄת»»ÈçÏ£º
1¡¢×Ö·û´®µ½PChar
    p:=PChar(s);
2¡¢PCharµ½×Ö·û´®
    s:=p;
3¡¢PCharµ½×Ö·ûÊý×é
    StrCopy(@a,p);
4¡¢×Ö·ûÊý×éµ½PChar
   ......
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