Build Real C++ Projects

Build your first complete C++ program step by step. Start with Hello World and progressively add variables, user input, and calculations to create a practical rectangle area calculator.

Build a fixed-size array wrapper class with bounds checking and O(1) random access. Learn how arrays store elements in contiguous memory.

Build a resizable array that automatically grows when you add elements. This is the foundation of std::vector and demonstrates amortized O(1) insertion through the geometric growth strategy.

Build a dynamic data structure where each element (node) contains data and a pointer to the next node. Unlike arrays, linked lists can grow and shrink at runtime and provide O(1) insertion at the front, making them ideal for stacks, queues, and situations where frequent insertions are needed.

Build a Stack data structure that demonstrates the LIFO (Last In First Out) principle. Stacks are fundamental in computer science, powering function calls, undo systems, and expression evaluation. You'll implement a template-based stack using a dynamic array internally.

Build a FIFO (First In First Out) data structure using a circular array. Queues are fundamental for task scheduling, breadth-first search, and any scenario where processing order must match arrival order.

Implement the linear search algorithm to find elements in an array by checking each element sequentially. This fundamental algorithm introduces you to algorithmic thinking and time complexity analysis with O(n) worst-case performance.

Build a 2D gravitational lensing simulator with OpenGL. Visualize light ray bending around a black hole using the Schwarzschild metric and numerical integration. (Updated version with geometric units and improved code organization)