unit1.pas

来自「Delphi函数参考大全的CD」· PAS 代码 · 共 55 行

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Math;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Edit4: TEdit;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  my:Array[0..5] of double;
  i:integer;
begin
  for i:=0 to 5 do
    my[i]:=0;
  my[0]:=-2000000;
  my[1]:=500000;
  my[2]:=600000;
  edit1.Text:=floattostr(InternalRateOfReturn(0.1,my)*100);
  my[3]:=750000;
  edit2.Text:=floattostr(InternalRateOfReturn(0.1,my)*100);
  my[4]:=900000;
  edit3.Text:=floattostr(InternalRateOfReturn(0.1,my)*100);
  my[5]:=1050000;
  edit4.Text:=floattostr(InternalRateOfReturn(0.1,my)*100);
end;


end.