Question

Write the difference between object-oriented and structured programming.

Hint:

OOP is better for handling large, complex software projects due to modularity, while SP is simpler for smaller tasks where a clear, linear execution is needed.

Answer 1

Object-Oriented Programming (OOP) and Structured Programming (SP) are two different paradigms, each with distinct principles for organizing and designing code. 1. **Object-Oriented Programming (OOP)**: - **Concept**: OOP focuses on objects that represent real-world entities. These objects are instances of classes and encapsulate both **data (attributes)** and **methods (behaviors)**. - **Core Concepts**: - **Encapsulation**: Data and methods are grouped into a single unit (the class). - **Inheritance**: A class can inherit methods and attributes from another class. - **Polymorphism**: Objects of different classes can share the same method name but perform different actions. - **Abstraction**: Hides complex implementation details and only exposes essential features. - **Example**: Consider a `Car` class that defines attributes like `speed` and `color`, and methods like `accelerate()` and `brake()`. A subclass `ElectricCar` could inherit these features and add more specific methods like `charge()`. 2. **Structured Programming (SP)**: - **Concept**: SP follows a top-down approach, focusing on breaking the program into smaller sub-problems or functions. The program flow is sequential and linear, emphasizing clarity and simplicity. - **Key Characteristics**: - The use of **functions** (procedures) to divide the problem. - A linear flow of control using **loops**, **conditionals**, and **function calls**. - **Example**: A program that calculates the sum of numbers would have a function `add()` that takes two numbers as input and returns their sum. 3. **Major Differences**: - OOP organizes code around objects and promotes reusability and scalability, making it suitable for large, complex systems. - SP organizes code around functions and linear control flow, making it easier to understand for small programs but less flexible for larger systems.