History of Object-Oriented Programming

class CargoShip extends Ship { double cargoWeight;

@Override void move(double time) { // Heavier ships move slower double adjustedSpeed = speed * (1.0 - cargoWeight / 10000.0); positionX += adjustedSpeed * time; } }

Everything is an object in Python

x = 42 print(type(x)) # <class 'int'> - even integers are objects print(x.bit_length()) # Calling a method on an integer object

Lists are objects with methods

numbers = [3, 1, 4, 1, 5] numbers.sort() # Sending the 'sort' message to the list object

#include <iostream> #include <string>

class Animal { protected: std::string name; public: Animal(std::string n) : name(n) {} virtual void speak() = 0; // Pure virtual function virtual ~Animal() {} };

class Dog : public Animal { public: Dog(std::string n) : Animal(n) {} void speak() override { std::cout << name << " says: Woof!" << std::endl; } };

int main() { Animal* pet = new Dog("Rex"); pet->speak(); // Polymorphism in action delete pet; return 0; }