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 D4R32
//Driver for routine PLGNDR
uses
  unit2;
{$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
var
  ACTUAL:array[1..5] of real;X:array[1..5] of real;
  M,N:array[1..5] of integer;
  F:TextFile;  j:Integer;
const
  s2='.000000e+00';S3='###0';
begin
  ACTUAL[1]:=0.707106;       ACTUAL[2]:=0.115112;
  ACTUAL[3]:=84.2319;        ACTUAL[4]:=2.0460100e7;
  ACTUAL[5]:=-1.61205e12;
  N[1]:=1;           N[2]:=10;
  N[3]:=20;          N[4]:=10;
  N[5]:=20;
  M[1]:=0;           M[2]:=0;
  M[3]:=2;           M[4]:=10;
  M[5]:=10;
  X[1]:=0.707107;    X[2]:=0.707107;
  X[3]:=0.707107;    X[4]:=0.707107;
  X[5]:=0;
  //輸出計算結(jié)果到文件
  AssignFile(F, 'd:\delphi_shu\p4\d4r32.dat');
  Rewrite(F);
  Writeln(F, 'N    M       X         Actual       PLGNDR(N,M,X)');
  For j:= 1 To 5 do
  begin
    Writeln(F,FormatFloat(s3,N[j]),'   ',FormatFloat(s3,M[j]),'   ',
      FormatFloat(s2,X[j]),'    ',FormatFloat(s2,Actual[j]),'    ',
      FormatFloat(s2,PLGNDR(N[j],M[J],X[J])));
  end;
  CloseFile(F);
  //屏幕顯示計算結(jié)果
  memo1.Lines.LoadFromFile('d:\delphi_shu\p4\d4r32.dat');
end;
end.