unit2.pas

小学生加减法出题器V0.1,专门给小学生加减法的联系所用

unit Unit2;

interface

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

type
  TForm2 = class(TForm)
    RichEdit1: TRichEdit;
    Panel1: TPanel;
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    SaveDialog1: TSaveDialog;
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}
Function showstr(str:string;F:boolean=False;Titlestr:string='注意'):boolean;
begin
      result:=False;
      if not F then
      begin
          application.MessageBox(pchar(str),pchar(titlestr),MB_OK);
          exit;
      end;
      result:=application.MessageBox(pchar(str),pchar(titlestr),MB_OKCancel)=IDOK;
end;
procedure TForm2.Button2Click(Sender: TObject);
begin
    Close;
end;

procedure TForm2.Button1Click(Sender: TObject);
begin
    SaveDialog1.FileName:='小学数据题目与答案'+formatdatetime('yyyymmdd-hhnn',now)+'.txt';
    if not SaveDialog1.Execute then exit;
    if fileExists(SaveDialog1.FileName) then
    begin
        if not showstr('你需要保存的文件已经存在，请确定是否需要覆盖这个文件？'+SaveDialog1.FileName,true) then
            exit;
    end;
    RichEdit1.Lines.SaveToFile(Savedialog1.FileName);
end;

end.