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var
  s:string;
  p:pchar;
  a:array[1..20] of char;
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1¡¢×Ö·û´®µ½PChar
    p:=PChar(s);
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    s:=p;
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    StrCopy(@a,p);
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    PChar(@a);
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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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