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Age Checker in Delphi

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.

Square a Number Using Lazarus Free Pascal

Circle Using a Class in Java

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");

    }

}

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Temperature Converter Using a Class in Python

Temperature Converter Using a Class in Python

 

Program Listing

class TemperatureConverter:

    @staticmethod

    def celsius_to_fahrenheit(celsius):

        return (celsius * 9 / 5) + 32

    @staticmethod

    def fahrenheit_to_celsius(fahrenheit):

        return (fahrenheit - 32) * 5 / 9

celsius_temperature = 34.36

fahrenheit_temperature = 134.98

print("\n\tTemperature Converter Using a Class in Python\n")

print("\tCelsius to Fahrenheit: {:.2f}°C = {:.2f}°F".format(celsius_temperature, TemperatureConverter.celsius_to_fahrenheit(celsius_temperature)))

print("\tFahrenheit to Celsius: {:.2f}°F = {:.2f}°C".format(fahrenheit_temperature, TemperatureConverter.fahrenheit_to_celsius(fahrenheit_temperature)))

print("\n\tEnd of Program. Thank you for Using This Program\n")

Simple Calculator Using Class in Python

Simple Calculator Using a Class in Python

 

Program Listing

class Calculator:

    def __init__(self):

        print("\n\tSimple Calculator Using a Class in Python\n\n")

    def get_user_input(self):

        self.num1 = float(input("\tEnter the first number: "))

        self.operator = input("\tEnter the operator (+, -, *, /): ")

        self.num2 = float(input("\tEnter the second number: "))

    def calculate_result(self):

        if self.operator == '+':

            self.result = self.num1 + self.num2

        elif self.operator == '-':

            self.result = self.num1 - self.num2

        elif self.operator == '*':

            self.result = self.num1 * self.num2

        elif self.operator == '/':

            if self.num2 != 0:

                self.result = self.num1 / self.num2

            else:

                print("\tError: Division by zero is not allowed.")

                exit(1)

        else:

            print("\tError: Invalid operator")

            exit(1)

    def display_result(self):

        print("\n\tThe Result is  ", self.result, ".")

        print("\n\tEnd of Program")

# Create an instance of the Calculator class

calculator = Calculator()

# Get user input

calculator.get_user_input()

# Calculate and display the result

calculator.calculate_result()

calculator.display_result()

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Animals Sound Using Polymorphism in C++

Animals Sound Using Polymorphism in C++

 

Program Listing

#include <iostream>

class Animal {

public:

    virtual void makeSound() {

        std::cout << "The animal makes a sound." << std::endl;

    }

};

class Dog : public Animal {

public:

    void makeSound() override {

        std::cout << "\tThe dog barks." << std::endl;

    }

};

class Snake : public Animal {

public:

    void makeSound() override {

        std::cout << "\tThe snake ssshh." << std::endl;

    }

};

class Cat : public Animal {

public:

    void makeSound() override {

        std::cout << "\tThe cat meows." << std::endl;

    }

};

int main() {

    Animal* animals[3];

    animals[0] = new Dog();

    animals[1] = new Cat();

    animals[2] = new Snake();

 std::cout <<"\n\n\tAnimals Sound Using Polymorphism in C++\n\n";

    for (int i = 0; i < 3; i++) {

        std::cout << "\tAnimal " << i + 1 << ": ";

        animals[i]->makeSound();

    }

    // Don't forget to delete the dynamically allocated objects to free memory.

    for (int i = 0; i < 3; i++) {

        delete animals[i];

    }

std::cout << "\n\tEnd of Program. Thank you for using this program." << std::endl;

    return 0;

}

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Student Records Using Encapsulation in Python

Student Records Using Encapsulation in Python

 Student Records Using Encapsulation in Python

                             Screenshot

Program Listing

class Student:

def __init__(self, student_name, student_age, student_grade):
self.name = student_name
self.age = student_age
self.grade = student_grade

def get_name(self):
return self.name

def get_age(self):
return self.age

def get_grade(self):
return self.grade

def set_name(self, student_name):
self.name = student_name

def set_age(self, student_age):
self.age = student_age

def set_grade(self, student_grade):
self.grade = student_grade


if __name__ == "__main__":
student = Student("Julianna Rae Pomperada", 16, 92)

print("\n\tStudent Records Using Encapsulation in Python")
print("\n\tDisplay Student Record\n")
print("\tStudent Name: " + student.get_name())
print("\tStudent Age: " + str(student.get_age()) + " years")
print("\tStudent Grade: " + str(student.get_grade()))

student.set_name("Jacob Samuel Pomperada")
student.set_age(18)
student.set_grade(88)

print("\n\tUpdated Student Record\n")
print("\tStudent Name: " + student.get_name())
print("\tStudent Age: " + str(student.get_age()) + " years old.")
print("\tStudent Grade: " + str(student.get_grade()))
print("\n\tEnd of Program. Thank you for using this program.")

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Addition and Subtraction of Two Numbers Using Polymorphism in JavaScript

 

Program Listing

const readline = require('readline');

class MathOperation {

    performOperation(a, b) {

        return 0; // Base class default implementation

    }

}

class Addition extends MathOperation {

    performOperation(a, b) {

        return a + b;

    }

}

class Subtraction extends MathOperation {

    performOperation(a, b) {

        return a - b;

    }

}

const rl = readline.createInterface({

    input: process.stdin,

    output: process.stdout

});

rl.question("\n\tEnter the first number: ", (num1) => {

    rl.question("\tEnter the second number: ", (num2) => {

        rl.question("\tEnter the operation (+ for addition, - for subtraction): ", (op) => {

            let operation;

            if (op === '+') {

                operation = new Addition();

            } else if (op === '-') {

                operation = new Subtraction();

            } else {

                console.log("\tInvalid operation.");

                rl.close();

                process.exit();

            }

            const result = operation.performOperation(parseInt(num1), parseInt(num2));

            console.log("\n\tThe Result:", result);

            rl.close();

            console.log("\n\tEnd of Program. Thank you for using this program.\n");

        });

    });

});

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