zulzulai

class Animal {
  void sound() {
    print("Animal makes a sound");
  }
}

class Cat extends Animal {
  @override
  void sound() => print("Cat meows");
}

zulzulai

abstract class Employee {
  double calculateSalary();
}

class FullTimeEmployee extends Employee {
  @override
  double calculateSalary() => 50000;
}

class PartTimeEmployee extends Employee {

zulzulai

class Vehicle {
  void start() {
    print("Vehicle started");
  }
}

class Car extends Vehicle {
  void drive() {
    print("Car is driving");
  }

zulzulai

class Shape {
  void draw() {
    print("Drawing shape");
  }
}

class Circle extends Shape {
  @override
  void draw() {
    print("Drawing Circle");

zulzulai

class Animal {
  void eat() {
    print("Animal is eating");
  }
}

class Dog extends Animal {
  void bark() {
    print("Dog is barking");
  }

zulzulai

class Rectangle {
  double length;
  double width;

  Rectangle(this.length, this.width);

  double area() => length * width;
  double perimeter() => 2 * (length + width);
}

zulzulai

class BankAccount {
  double _balance = 0;

  void deposit(double amount) {
    _balance += amount;
  }

  void withdraw(double amount) {
    if (amount <= _balance) {
      _balance -= amount;

zulzulai

class Car {
  String? brand;
  int? year;

  Car() {
    brand = "Unknown";
    year = 0;
  }

  Car.withDetails(this.brand, this.year);

zulzulai

class Person {
  String name;
  int age;

  Person(this.name, this.age);

  void display() {
    print("Name: $name");
    print("Age: $age");
  }