A c++ high-precision calculator program, with plus, minus, fast multiply, improved division, improved module, fast power, bit-wise and, bit-wise or and bit-wise xor. Based on console, with colourful output.

feat: built state-based JavaScript calculator with DOM manipulation - Add support for real-time input handling with cursor control - Handle basic arithmetic operations and error states - Introduce application state management for expression handling - Add calculation history tracking (console-based) - Improve UI interaction using event-driven archi