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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
    PChar(@a);
5¡¢×Ö·û´®Óë×Ö·ûÊý×éÖ®¼äµÄת»»¾ÍÖ»ÓÐͨ¹ýPCharÀ´ÖÐתÁË¡£ÀýÈçÏÂÃæÕâ¸öÀý×Ó£º
procedure TForm1.btn1Click(Sender: TObject);
var
  str:array[1..10] of char;
begin
  StrCopy(@str,PChar(mmo1.Text));
  mmo2.Text:=PChar(@str);
end;
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