unit1.pas

用DEPHI实现计算最大公约数

unit Unit1;

interface

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

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

var
  Form1: TForm1;

implementation

{$R *.dfm}

function TForm1.estate(s: String): String;
var
  int1,i,j : Integer;
  sum,jc : variant;
  str1 : string;
begin
  if StrToInt(Edit1.Text)>100 then
    showmessage('输入的数值只能在0~100之间')
  else
  begin
    sum := 3;
    int1 := StrToInt(s);
    jc := 2;
    if (int1<>1) and (int1<>2) then
    begin
    for i:=3 to int1 do
    begin
      jc:= jc*i;
      sum := sum+jc;
    end;
    str1 := sum;
    result := str1;
    end
    else
    begin
      if int1=1 then
        result := '1'
      else
        result := '2';
    end;
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Edit2.Text := estate(Trim(Edit1.Text));
end;

end.