unit1.pas

来自「1、说明： 本书中所有的常用数值算法子过程按书中的章数分别放在以C开头」· PAS 代码 · 共 56 行

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 D4R29
//Driver for routine EX
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='%8.2f';s2='.0000000e+00';
begin
  ACTUAL[1]:=0.5597736;       ACTUAL[2]:=0.2193839;
  ACTUAL[3]:=0.1000196;       ACTUAL[4]:=0.01304838;
  ACTUAL[5]:=0.001148299;
  X[1]:=0.5;     X[2]:=1;
  X[3]:=1.5;     X[4]:=3;
  X[5]:=5;
  //输出计算结果到文件
  AssignFile(F, 'd:\delphi_shu\p4\d4r29.dat');
  Rewrite(F);
  Writeln(F, '      X        Actual          EX(X)');
  For j:= 1 To 5 do
  begin
    Writeln(F,Format(s1,[X[j]]),'    ',FormatFloat(s2,Actual[j]),
        '    ',FormatFloat(s2,EX(X[J])));
  end;
  CloseFile(F);
  //屏幕显示计算结果
  memo1.Lines.LoadFromFile('d:\delphi_shu\p4\d4r29.dat');
end;
end.