unit1.pas

《Delphi常用数值算法集》的配书源码

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 D4R6
//Driver for routine GAMMP
uses
  unit2;
{$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
var
  ACTUAL:array[1..5] of real;X,A:array[1..5] of real;
  F:TextFile;  j:Integer; 
const
  s1='%6.2f';s2='%12.6f';
begin
  ACTUAL[1]:=0.742026;    ACTUAL[2]:=0.989896;
  ACTUAL[3]:=0.632121;    ACTUAL[4]:=0.993262;
  ACTUAL[5]:=0.038732;
  A[1]:=0.1;  A[2]:=0.1;
  A[3]:=1;    A[4]:=1;
  A[5]:=6;
  X[1]:=0.031623;    X[2]:=1.581139;
  X[3]:=1;    X[4]:=5;
  X[5]:=2.44949;
  //输出计算结果到文件
  AssignFile(F, 'd:\delphi_shu\p4\d4r6.dat');
  Rewrite(F);
  Writeln(F, '   A         X         Actual     GAMMP(A,X)');
  For j:= 1 To 5 do
  begin
    Writeln(F,Format(s1,[A[j]]),Format(s2,[X[j]]),
      Format(s2,[Actual[j]]),Format(s2,[GAMMP(A[j],X[J])]));
  end;
  CloseFile(F);
  //屏幕显示计算结果
  memo1.Lines.LoadFromFile('d:\delphi_shu\p4\d4r6.dat');
end;

end.