Low Level Design - Object Oriented Design - 1. Tic Tac Toe

🎯 Low Level Design: Tic Tac Toe - Complete System Design in C++ In this video, I explain the complete Low Level Design (LLD) for a Tic Tac Toe game using Object-Oriented Programming principles in C++! 📌 Problem Overview: Design a Tic Tac Toe game that supports: - Two players (X and O) - 3x3 game board - Turn-based gameplay - Win detection (rows, columns, diagonals) - Draw detection - Game state management 💡 Design Components: **Classes & Responsibilities:** - **Player** - Stores player information (name, symbol X/O) - **Board** - Manages the 3x3 grid, validates moves, checks game state - **Game** - Controls game flow, switches turns, declares winner - **Move** - Encapsulates a move (row, column, player) **Key Design Patterns:** - Single Responsibility Principle - each class has one clear purpose - Encapsulation - board state is private, accessed through methods - Strategy Pattern (optional) - for different win checking strategies **Core Methods:** - `makeMove(int row, int col)` - Place a symbol on the board - `checkWinner()` - Detect if a player has won - `isBoardFull()` - Check for draw condition - `switchPlayer()` - Alternate between players 🔧 Implementation Features: - Input validation (prevent invalid moves) - Clean separation of concerns - Extensible design (easy to add AI, different board sizes, etc.) - Clear game state representation 📚 Perfect for preparing for LLD interviews at FAANG companies! **Extensions to Consider:** - N×N board support - Multiple players - Undo/Redo functionality - AI opponent - Tournament mode - Save/Load game state ⭐ If this helped you, please like and subscribe for more LLD videos! #lowleveldesign #systemdesign #cpp #coding #programming #oops #designpatterns #interview #faang #lld #tictactoe