unit1.pas

Delphi函数参考大全的CD

unit Unit1;

interface

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

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

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  FRate,FPresentValue:extended;
  FYear:integer;
begin
  FRate:=0.06;
  FPresentValue:=80000;
  FYear:=5;
  edit1.Text:=Floattostr(PeriodPayment(Frate / 12, 1, FYear*12, FPresentValue,
0,ptEndOfPeriod) );
  edit2.Text:=Floattostr(PeriodPayment(Frate / 12, 2, FYear*12, FPresentValue,
 0,ptEndOfPeriod) );
  edit3.Text:=Floattostr(PeriodPayment(Frate / 12, 3, FYear*12, FPresentValue,
 0,ptEndOfPeriod) );
end;

end.