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 D4R1
//Driver for routine GAMMLN
uses
  unit2;
  {$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
var
  ACTUAL:array[1..5] of REAL;X:array[1..5] of real;
  F:TextFile;   j:Integer;
const
  s1='%14.6f';
begin
  ACTUAL[1]:= 1.524064;    ACTUAL[2]:= 0.0 ;
  ACTUAL[3]:= -0.085374;   ACTUAL[4]:= 12.80183;
  ACTUAL[5]:= 39.33989;
  X[1]:= 0.2;    X[2]:= 1.0;
  X[3]:= 1.2;    X[4]:= 10;
  X[5]:= 20;
  //輸出計算結果到文件
  AssignFile(F, 'd:\delphi_shu\p4\d4r1.dat');
  Rewrite(F);
  Writeln(F, '          X          Actual        GAMMA(X)');
  For j:= 1 To 5 do
    Writeln(F,Format(s1,[X[j]]),Format(s1,[Actual[j]]),Format(s1,[GAMMLN(X[j])]));
  CloseFile(F);
  //屏幕顯示計算結果
  memo1.Lines.LoadFromFile('d:\delphi_shu\p4\d4r1.dat');
end;
end.