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 D4R11
//Driver for routine ERFC
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='%14.7f';  s2='%6.2f';
begin
  ACTUAL[1]:= 0.7772974;    ACTUAL[2]:= 0.257899;
  ACTUAL[3]:= 0.1572992;    ACTUAL[4]:= 0.089686;
  ACTUAL[5]:= 0.0109095;
  X[1]:= 0.2;    X[2]:= 0.8;
  X[3]:= 1;    X[4]:= 1.2;
  X[5]:= 1.8;
  //輸出計算結果到文件
  AssignFile(F, 'd:\delphi_shu\p4\d4r11.dat');
  Rewrite(F);
  Writeln(F, '    X        Actual        ERFC(X)');
  For j:= 1 To 5 do
    Writeln(F,Format(s2,[X[j]]),Format(s1,[Actual[j]]),
        Format(s1,[ERFC(X[j])]));
  CloseFile(F);
  //屏幕顯示計算結果
  memo1.Lines.LoadFromFile('d:\delphi_shu\p4\d4r11.dat');
end;

end.