Create README.md

Author: RezaGooner

README.md

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+
+---
+
+# Prefix-Postfix Algorithms
+
+This repository contains C++ implementations of **Prefix**, **Postfix**, and **Infix** expression conversion algorithms. These algorithms are fundamental for understanding how expressions are parsed and evaluated in computer science.
+
+## Features
+- **Prefix to Infix Conversion**
+- **Postfix to Infix Conversion**
+- **Evaluation of Postfix Expressions**
+
+## Installation
+Clone this repository to your local machine:
+```bash
+git clone https://github.com/RezaGooner/prefix-postfix-algorithms.git
+```
+Then compile and run the C++ code using your preferred IDE or command line:
+```bash
+g++ main.cpp -o expression-converter
+./expression-converter
+```
+
+## Example Usage
+1. **Prefix to Infix**: Convert a prefix expression (e.g., `+ A B`) to its infix form `(A + B)`.
+2. **Postfix to Infix**: Convert a postfix expression (e.g., `A B +`) to its infix form `(A + B)`.
+
+## License
+This project is licensed under the **Apache-2.0 License**.
+
+---
+
+Feel free to adjust the content to match any specific details or functionality you would like to highlight!