unit1.~pas

本光盘是《Delphi 7应用教程》一书的配套光盘

unit Unit1;

interface

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

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

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  m,n,k,j:Integer;        //定义整型变量
  str:String;             //定义字符串变量
begin
  m:=StrToInt(Edit1.Text);
  n:=StrToInt(Edit2.Text);
  str:='';
  if (m>n) then
    begin                   //如果m>n，就交换它们的值
      k:=m;
      m:=n;
      n:=k;
    end;
  for j:=m+1 to n-1 do
    begin
      if (j mod 4)=0 then
        continue;  //如果能被4整除，就终止本次循环，开始新的循环
      str:=str+IntToStr(j)+',';//如果不能被4整除，就添加到字符串中
    end;
  Edit3.Text:=Copy(str,1,Length(str)-1);  //去掉最后一个分号
end;

end.