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RPNCalc

RPN calculator written in Free Pascal / Lazarus. Supports standard functions, trigonometry with angle modes (deg/rad/gra) and stack operations (Swap, Drop, Dup).

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README

RPNCalc

A fast, lightweight Reverse Polish Notation calculator built with Lazarus and Free Pascal. rpncalc

RPNCalc is a desktop calculator designed for users who prefer the efficiency of RPN (postfix notation). By eliminating the need for parentheses, it allows for faster complex calculations and provides a clear view of the evaluation stack.

🚀 Features

  • RPN Engine: Efficiently handle complex expressions without parentheses.
  • Visual Stack: See exactly what is on the stack at any given time.
  • Native Performance: Built with Free Pascal for high speed and low memory usage.
  • Standalone Binary: No heavy dependencies or installers required for Linux.

🛠 Getting Started

Prerequisites

  • Lazarus: the Free Pascal RAD IDE. If you can run Lazarus on your platform, you can compile this code.

Installation

You can run the standalone binary immediately if you are running a 64-bit Linux distribution.

  1. Download the latest release from the Releases page.
  2. Open your terminal and navigate to the download folder.
  3. Give the file execution permissions:
    bash
    chmod +x rpncalc
  4. Run the application:
    bash
    ./rpncalc

Building from Source

To compile the project yourself, you will need the Lazarus IDE:

  1. Clone the repository:
    bash
    git clone [https://github.com/tailkinker/RPNCalc.git](https://github.com/tailkinker/RPNCalc.git)
  2. Open Lazarus.
  3. Go to Project > Open Project and select rpncalc.lpi.
  4. Press F9 to build and run.
  5. Alternately, run lazbuild rpncalc.lpi in the source directory.

📜 License

Distributed under the GNU GPL v3 License. See LICENSE for more information.

Author: tailkinker