In Week 9, I dived deep into Object-Oriented Programming in C++ with a special focus on inheritance and overloading. This week was all about implementing concepts like multiple, multi-level, hierarchical, and hybrid inheritance, alongside constructor and function overloading to build real-life simulations and utility-based mini apps.

🔹 Day 57 – Virtual Functions & Eligibility Checks

  • Calories Burned Calculator – Polymorphism with virtual functions
  • Rent Eligibility Checker – Calculates rent based on income percentage
  • Library Fine System – Computes fines using inheritance and date logic

🔹 Day 58 – Multiple Inheritance in Action

  • Electricity Bill Calculator – Based on unit usage and connection type
  • GDP per Capita – Divides GDP by population
  • Health Assessment – Combines BMI and blood pressure metrics

🔹 Day 59 – Multi-level Inheritance Utilities

  • Car Parameter Calculator – Calculates range, payload, and weight
  • Fuel vs Electric Comparison – Estimates range of different car types
  • Travel Budget Planner – Solo trip expense planner

🔹 Day 60 – Hierarchical & Simple Applications

  • Simple Banking System – Deposit, withdrawal, and interest
  • Plant Discount System – Ratings and discount logic
  • Language Stats – English and Spanish speaker majority calculation

🔹 Day 61 – Hybrid Inheritance Systems

  • Student Record System – UG/PG grading & evaluation
  • Weather Monitor – Checks weather from temp & humidity
  • Vehicle Rental Calculator – Costs based on mileage and type

🔹 Day 62 – Constructor Overloading in Practice

  • Odd/Even Sum Calculator – Constructor logic based on user input
  • Distance Converter – Miles ↔ Km with validation
  • Speed Calculator – Overloaded constructor for time format flexibility

🔹 Day 63 – Function Overloading for Flexibility

  • Minimum Finder – Overloaded function for int/double
  • Millimetre Converter – Converts mm → cm/km based on input
  • Shopping Cart Total – Calculates total with/without discount

🏁 Key Highlights

  • Implemented every major inheritance type in practical projects
  • Applied constructor & function overloading for reusability and abstraction
  • Built 20+ projects simulating real-world scenarios using OOP

🔍 Looking Ahead

As I move into Week 10, the focus will shift toward integrating OOP concepts into more structured systems and starting small project-based builds. The goal is to get closer to real-world app architecture.

📌 Stay tuned and follow my journey on GitHub for all code updates!

💬 What’s your favorite way to apply inheritance in your own projects?