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 D7R7
//Driver for routine FLEG
uses
  unit2;
{$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
const
  s1='%10.4f'; s2='%5.2f';
  NVAL = 5; NPOLY = 5;  DX = 0.2;
var
  AFUNC:array[0..5] of real;
  I,J:integer;   X:real;
  F:TextFile;
begin
  //輸出計算結果到文件
  AssignFile(F, 'd:\delphi_shu\p7\d7r7.dat');
  Rewrite(F);
  Writeln(F, ' Legendre Polynomials ');
  Writeln(F);
  Writeln(F, '     N=1       N=2        N=3       N=4      N=5');
  For I:=1 To NVAL do
  begin
    X:=I * DX;
    FLEG(X,AFUNC,NPOLY);
    Writeln(F,' X= ',Format(S2,[X]));
    Writeln(F,Format(s1,[AFUNC[1]]),Format(s1,[AFUNC[2]]),
              Format(s1,[AFUNC[3]]),Format(s1,[AFUNC[4]]),
              Format(s1,[AFUNC[5]]),'   routine FLEG');
    Writeln(F,Format(s1,[PLGNDR(0,0,X)]),Format(s1,[PLGNDR(1,0,X)]),
              Format(s1,[PLGNDR(2,0,X)]),Format(s1,[PLGNDR(3,0,X)]),
              Format(s1,[PLGNDR(4,0,X)]),'   routine PLGNDR');
    Writeln(F);
  end;
  Writeln(F);
  CloseFile(F);
  //屏幕顯示計算結果
  memo1.Lines.LoadFromFile('d:\delphi_shu\p7\d7r7.dat');
end;

end.