Monday, November 4, 2024
Age Checker in Delphi
Program Listing
unit demo;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ToolWin, Vcl.ComCtrls;
type
TForm1 = class(TForm)
StatusBar1: TStatusBar;
ToolBar1: TToolBar;
Edit1: TEdit;
Label1: TLabel;
Label2: TLabel;
Button1: TButton;
Button2: TButton;
Button3: TButton;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
private
{ Private declarations }
function AskToQuit: Boolean;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
// Programmer : Dr. Jake R. Pomperada
// Date : November 4, 2024
procedure TForm1.Button1Click(Sender: TObject);
var
age: Integer;
begin
try
age := StrToInt(edit1.Text);
if age >= 18 then
label2.Caption := 'You are an adult. At age of ' +IntToStr(age) + ' years old.'
else
label2.Caption := 'You are a minor. At age of ' +IntToStr(age) + ' years old.';
except
on EConvertError do
ShowMessage('Please enter a valid age (a number).');
end;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
label2.Caption := '';
edit1.text := '';
edit1.SetFocus;
end;
procedure TForm1.Button3Click(Sender: TObject);
begin
if AskToQuit then
Close // Close the form if user confirms
else
edit1.SetFocus;
end;
function TForm1.AskToQuit: Boolean;
begin
Result := MessageDlg('Are you sure you want to quit?', mtConfirmation, [mbYes, mbNo], 0) = mrYes;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
// Optionally adjust the form position here if needed
// For example, move it slightly to the left and up
Left := (Screen.Width - Width) div 2; // Center horizontally
Top := (Screen.Height - Height) div 2; // Center vertically
end;
end.
Sunday, November 3, 2024
Circle Using a Class in Java
Program Listing
import java.text.DecimalFormat;
class Circle {
private double radius;
public Circle(double radius) {
this.radius = radius;
}
public double getRadius() {
return radius;
}
public double calculateArea() {
return Math.PI * Math.pow(radius, 2);
}
public double calculateCircumference() {
return 2 * Math.PI * radius;
}
}
public class Main {
public static void main(String[] args) {
Circle circle = new Circle(8.15);
DecimalFormat df = new DecimalFormat("#.00");
System.out.println("\n\tCircle Using a Class in Java\n");
System.out.println("\tRadius: " + df.format(circle.getRadius()));
System.out.println("\tArea: " + df.format(circle.calculateArea()));
System.out.println("\tCircumference: " + df.format(circle.calculateCircumference()));
System.out.println("\n\tEnd of Program. Thank you for Using This Program\n");
}
}