###这是FORTRAN编的动态链接库程序
subroutine zhu9(size,x1,x2,x3,x4)

  ! Expose subroutine zhu9 to users of this DLL
  !DEC$ ATTRIBUTES DLLEXPORT::zhu9
  !DEC$ ATTRIBUTES ALIAS:'zhu9'::zhu9
  !DEC$ ATTRIBUTES REFERENCE::x3,x4

integer(4) size
Real(8) x1(size,size),x2(size,size)
Real(8) x3(size,size),x4(size,size)

x3=x1+x2;
x4=x1-x2;
end subroutine zhu9

####这是DELPHI调用该动态链接库程序。当输出变量只有1个，如x3或x4时运行正常。但是x3、x4同时作为输出量后， x4无结果或显示内存地址错，什么原因？望指教
unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Edit3: TEdit;
    Button1: TButton;
    Edit4: TEdit;
    Edit5: TEdit;
    Edit6: TEdit;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }

  end;

var
  Form1: TForm1;

implementation
 Procedure zhu9(Const size,x1,x2:pointer;Var x3,x4:array of double);stdcall;external'DLL\zhu9.dll';
{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
    a1,a2: array of double;
    a3,a4: array of double;
    size:integer;
begin
SetLength(a1,4);
SetLength(a2,4);
SetLength(a3,4);
SetLength(a4,4);
a1[0] := 1;  a1[1] := 2.00;   a1[2] := 3.00;  a1[3] := 4.00;
a2[0] :=10;  a2[1] :=20.00;   a2[2] :=30.00;  a2[3] :=40.00;

size:=2;
  zhu9(@size,@a1[0],@a2[0],a3,a4);

Edit3.Text:=floattostr(a3[0]);
Edit4.Text:=floattostr(a3[1]);
Edit5.Text:=floattostr(a4[0]);
Edit6.Text:=floattostr(a4[1]);

end;

end.