iOS OOP & POP Programming Exercises

This repository contains Swift playground exercises demonstrating Object-Oriented Programming (OOP) and Protocol-Oriented Programming (POP) concepts.

Exercise 1: Social Media Post Class

• ✅ Demonstrates basic class creation with properties and methods
• ✅ Implements a Post class with author, content, and likes properties
• ✅ Includes a display() method to format post information

Exercise 2: Shopping Cart Singleton

• ✅ Implements the Singleton design pattern with a ShoppingCartSingleton class
• ✅ Uses composition for managing Product objects
• ✅ Includes discount strategies with the Strategy pattern
• ✅ Demonstrates cart management functionality

Exercise 3: Payment Processor Protocol

• ✅ Uses protocol-oriented programming with the PaymentProcessor protocol
• ✅ Implements error handling with custom PaymentError types
• ✅ Creates concrete implementations (CreditCardProcessor, CashProcessor)
• ✅ Demonstrates try-catch error handling for payment processing