Wednesday, September 28, 2016

Area of Rectangle in Delphi

Here is a sample program that I wrote using Delphi as my programming language that will compute the area of the rectangle. The code is very short and easy to understand.

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Sample Program Output


Program Listing

rectangle.pas

unit rectangle;

interface

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

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Label4: TLabel;
    Button1: TButton;
    Button2: TButton;
    Label5: TLabel;
    Label6: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

  Var length : integer;
  Var    breadth : integer;
  Var   compute_all : integer;

procedure TForm1.Button1Click(Sender: TObject);
begin
      length := StrToInt(Edit1.Text);
      breadth := StrToInt(Edit2.Text);

      compute_all := (length * breadth);

      label4.Caption :=  'The Area of the Rectangle is '
            + IntToStr(compute_all) + '.';

end;

procedure TForm1.Button2Click(Sender: TObject);
begin
Edit1.Text     := '';
Edit2.Text     := '';
Label4.Caption :='';
Edit1.Setfocus;
end;

end.




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