Arithmetic Calculator in C 🧮

A robust, modular command-line calculator implemented in C. This project is designed to demonstrate clean code architecture, header-source separation, and advanced mathematical error handling.

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🚀 Features

• Arithmetic: Basic operations (+, -, *, /, %) with operator precedence.
• Advanced Math: Power, Square Root, and Logarithm (base 10).
• Trigonometry: Sine, Cosine, Tangent, and their inverse functions (with automatic Degree/Radian conversion).
• Robust Error Handling: Division-by-zero protection, negative input sanitization for square roots/logs, and modular input validation.

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🤖 CI/CD Status

This repository uses GitHub Actions to automate the build and testing process on every push to the main branch.

• Automatic Compilation: The code is compiled using gcc with -Wall to ensure no warnings or errors exist.
• Automated Testing: The program is executed automatically to verify stability and check for runtime errors.
• Build Status: Check the badge at the top of the repository or visit the Actions tab to see live build logs.

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📁 Project Structure

File	Description
main.c	Contains the main driver code and the interactive menu system.
help.c	Implementation of all arithmetic, trigonometric, and math logic.
help.h	Header file containing function declarations and operator enums.
CMakeLists.txt	Configuration file for building the project using CMake.

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🛠️ Technical Stack

• Language: C (Standard C11)
• Build System: CMake
• Architecture: Modular design (main.c, help.c, help.h)
• Input Handling: Secure usage of fgets and scanf for crash-proof CLI interactions.

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📦 Build and Run

Prerequisites

• Ensure you have a C compiler (GCC/Clang) and CMake installed.

Clone the repository

git clone https://github.com/TScom-dew/calculatorProgram-using-c.git

cd calculatorProgram-using-c

Build the project

mkdir build && cd build
cmake ..
cmake --build .

Run the application

./calculator  # On Linux/macOS
.\calculator  # On Windows

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🎓 Learning Outcomes

This project was developed to practice:

1. Modular Programming: Separating logic into header and source files for clean maintainability.
2. Build Automation: Leveraging CMake for platform-independent compilation.
3. Defensive Coding: Writing secure CLI applications that handle unexpected user input gracefully.

🤝 Contributing

Contributions are welcome! If you have ideas for new features or improvements, feel free to fork this repository and submit a pull request.

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Made with ❤️ by TScom-dew

Happy Coding! ❤️