# Cell 1
a = 10

# Cell 2
b = 20

# Cell 3
c = a + b
print(c)

# Cell 4
for i in range(5):
    print(i)

# Cell 5
def square(x):
    return x * x

class Person:
    pass

p1 = Person()
print(type(p1))

<class '__main__.Person'>

class Student:
    def __init__(self, name, age):
        self.name = name
        self.age = age

s1 = Student("Sara", 20)
print(s1.name, s1.age)

class Dog:
    def __init__(self, breed):
        self.breed = breed

    def bark(self):
        print("Woof! I am a", self.breed)

d = Dog("Labrador")
d.bark()

class Book:
    def __init__(self, title):
        self.title = title

    def __str__(self):
        return f"Book: {self.title}"

b = Book("Harry Potter")
print(b)

class Animal:
    def __init__(self, name):
        self.name = name

    def speak(self):
        print("I am an animal.")

class Cat(Animal):
    def speak(self):
        print(f"{self.name} says Meow!")

c = Cat("Luna")
c.speak()

class Parent:
    def __init__(self):
        print("Parent init")

class Child(Parent):
    def __init__(self):
        super().__init__()
        print("Child init")

c = Child()

Parent init
Child init

class Account:
    def __init__(self, balance):
        self.__balance = balance  # private

    def show_balance(self):
        print("Balance:", self.__balance)

acc = Account(1000)
acc.show_balance()

class BankAccount:
    def __init__(self, name, balance):
        self.name = name
        self.__balance = balance

    def deposit(self, amount):
        self.__balance += amount

    def withdraw(self, amount):
        if amount <= self.__balance:
            self.__balance -= amount
        else:
            print("Insufficient funds")

    def show(self):
        print(f"{self.name} has ₹{self.__balance}")

user1 = BankAccount("Sara", 5000)
user1.show()

user1.deposit(2000)
user1.show()

user1.withdraw(3000)
user1.show()

class MathOps:
    @staticmethod
    def add(a, b):
        return a + b

print(MathOps.add(5, 7))

class Student:
    school = "CodeHigh"

    @classmethod
    def get_school(cls):
        return cls.school

print(Student.get_school())

class Calculator:
    def add(self, a: int, b: int) -> int:
        """Returns the sum of two numbers."""
        return a + b
calc = Calculator()

print(calc.add(2, 3))

class Vehicle:
    def __init__(self, name):
        self.name = name

    def drive(self):
        print(f"{self.name} is driving.")

class Car(Vehicle):
    def drive(self):
        print(f"{self.name} (car) is zooming!")

class Bike(Vehicle):
    def drive(self):
        print(f"{self.name} (bike) is vrooming!")

v = Vehicle("Generic")
v.drive()

c = Car("Suzuki")
c.drive()

b = Bike("Yamaha")
b.drive()

class Student:
    def __init__(self, name):
        self.__name = name

    def get_name(self):
        return self.__name

    def set_name(self, new_name):
        self.__name = new_name

s = Student("Sara")
print(s.get_name())
s.set_name("Queen Sara")
print(s.get_name())

class Book:
    def __init__(self, title):
        self.title = title
        self.available = True

class Library:
    def __init__(self):
        self.books = []

    def add_book(self, book):
        self.books.append(book)

    def show_books(self):
        for book in self.books:
            status = "Available" if book.available else "Issued"
            print(f"{book.title} - {status}")

    def issue_book(self, title):
        for book in self.books:
            if book.title == title and book.available:
                book.available = False
                print(f"{title} has been issued.")
                return
        print(f"{title} is not available.")

lib = Library()
book1 = Book("Harry Potter")
book2 = Book("Sherlock Holmes")
lib.add_book(book1)
lib.add_book(book2)

lib.show_books()

lib.issue_book("Harry Potter")
lib.show_books()

class Employee:
    def __init__(self, name, salary):
        self.name = name
        self.salary = salary

employees = [
    Employee("Sara", 70000),
    Employee("Ali", 65000),
    Employee("Afia", 72000)
]

for emp in employees:
    print(f"{emp.name} earns ₹{emp.salary}")