Delphi 分辨千位、百位、十位和个位数值

拼搏现实的明天。 2022-04-16 03:58 202阅读 0赞

unit Unit1;
    
    interface
    
    uses
      Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
      Dialogs, StdCtrls;
    
    type
      TForm1 = class(TForm)
        Label1: TLabel;
        Label2: TLabel;
        Label3: TLabel;
        Label4: TLabel;
        Button1: TButton;
        Button2: TButton;
        Button3: TButton;
        Button4: TButton;
        Edit1: TEdit;
        procedure Edit1Change(Sender: TObject);
        procedure Button1Click(Sender: TObject);
        procedure Button2Click(Sender: TObject);
        procedure Button3Click(Sender: TObject);
        procedure Button4Click(Sender: TObject);
      private
        { Private declarations }
      public
        { Public declarations }
      end;
    
    var
      Form1: TForm1;
    
    implementation
    
    {$R *.dfm}
    
    procedure TForm1.Edit1Change(Sender: TObject);
    begin
       Edit1.Text:='';   //点击一下edit为空
    end;
    
    procedure TForm1.Button1Click(Sender: TObject);
    var
         temp: Integer;  //定义整数temp
    begin
         temp:=strtoint(Edit1.Text);   //edit文本都是
         Label1.Caption:=inttostr(temp mod 10);
         Label1.Visible:=True;
    end;
    
    procedure TForm1.Button2Click(Sender: TObject);
    var
         temp: Integer;
    begin
         temp:=strtoint(Edit1.Text);
         Label2.Caption:=inttostr(temp div 10 mod 10);
         Label2.Visible:=True;
    end;
    
    procedure TForm1.Button3Click(Sender: TObject);
    var
         temp: Integer;
    begin
         temp:=strtoint(Edit1.Text);
         Label3.Caption:=inttostr(temp div 100 mod 10);
         Label3.Visible:=True;
    end;
    
    procedure TForm1.Button4Click(Sender: TObject);
    var
         temp: Integer;
    begin
         temp:=strtoint(Edit1.Text);
         Label4.Caption:=inttostr(temp div 1000 mod 10);
         Label4.Visible:=True;
    end;
    
    end.

方框如下：

![20181116153458990.png][]

运行结果如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjUyODA4OQ_size_16_color_FFFFFF_t_70][]

[20181116153458990.png]: /images/20220416/c746058afb0c4d2a8f09ddeea6d68bed.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjUyODA4OQ_size_16_color_FFFFFF_t_70]: /images/20220416/e8353f8c4de346afad22d3a09a5762e7.png