unit1.pas

水仙花的算法

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    ListBox1: TListBox;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  Int,a,b,c : Integer;
begin
  //水仙花数的算法是一个三位数，每一位数的立方相加等于该数本身。
  listbox1.Items.Clear;
  for Int:=100 to 999 do
  begin
    a := Int div 100;
    b := (int mod 100) div 10;
    c := Int mod 10;
    a:=a*a*a;
    b:=b*b*b;
    c:=c*c*c;
    if (a+b+c)=Int then
      listbox1.Items.Add(IntToStr(Int));
  end;
end;

end.