unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation
//PROGRAM D10R6
//Driver for routine CONVLV
uses
  unit2;
  {$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
const
  s1='%13.6f'; s2 = '##0';
  N = 16;  N2 = 32;  M = 9;  PI = 3.1415926;
var
  DATA,RESP:array[0..16] of real;  RESPNS:array[0..9] of real;
  ANS:array[0..32] of real;
  I,J,ISIGN:integer;   CMP:real;   F:TextFile;
begin
  //輸出計算結果到文件
  AssignFile(F, 'd:\delphi_shu\p10\d10r6.dat');
  Rewrite(F);
  Writeln(F);
  Writeln(F, '   I      CONVLV      Expected');
  For I:=1 To N do
  begin
    DATA[I]:=0;
    If (I >= (N / 2 - N / 8)) And (I <= (N / 2 + N / 8)) Then
      DATA[I]:=1;
  end;
  For I:=1 To M do
  begin
    RESPNS[I]:=0;
    If (I > 2) And (I < 7) Then RESPNS[I]:=1;
    RESP[I]:=RESPNS[I];
  end;
  ISIGN:=1;
  CONVLV(DATA, N, RESP, M, ISIGN, ANS);
  //Compare with a direct convolution
  For I:=1 To N do
  begin
    CMP:=0;
    For J:=1 To (M div 2) do
    begin
      CMP:=CMP + DATA[((I - J - 1 + N) Mod N) + 1] * RESPNS[J + 1];
      CMP:=CMP + DATA[((I + J - 1) Mod N) + 1] * RESPNS[M - J + 1];
    end;
    CMP:=CMP + DATA[I] * RESPNS[1];
    Writeln(F,'  ',FormatFloat(s2,I),Format(s1,[ANS[I]]),Format(s1,[CMP]));
  end;
  CloseFile(F);
  //屏幕顯示計算結果
  memo1.Lines.LoadFromFile('d:\delphi_shu\p10\d10r6.dat');
end;

end.