BigIntegerOperations

A C++ library for performing arbitrary-precision integer arithmetic, designed for use in Data Structures and Algorithms (DSA) projects or competitive programming environments.

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✨ Features

• ✅ Arbitrary-size integers (BigInteger)
• ✅ Supports negative numbers
• ✅ Input expressions like 2 - 32, -100 + 200 auto-parsed
• ✅ Core arithmetic:
  • ➕ Addition
  • ➖ Subtraction
  • ✖️ Multiplication
  • ➗ Division
  • 🧮 Modulus
• ✅ Comparisons: <, >, ==, etc.
• ✅ Clean object-oriented design
• ✅ Easy to extend with exponentiation, factorial, etc.

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🧱 Folder Structure

BigIntegerOperations/
├── include/
│   └── BigInteger.h # Main header
├── src/
│   ├── BigInteger.cpp # Implementation
│   └── main.cpp # User input + demo
├── CMakeLists.txt # CMake support
├── Build.bat # Windows one-click build + run
├── tests/ # (optional future tests)
└── README.md

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🧪 Sample Input & Output

Enter first large integer or expression (a): 2 - 32
Enter second large integer or expression (b): 1000000000000000000000000 + 500

a + b = 999999999999999999999970
b - a = 1000000000000000000000532
a * b = -32000000000000000000000000
b / a = -31250000000000000000000
b % a = 0

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🚀 Build Instructions

✅ Option 1: Build with CMake (Cross-platform)

git clone https://github.com/yourname/BigIntegerOperations.git
cd BigIntegerOperations
mkdir build
cd build
cmake ..
cmake --build .

Then run:

./main

✅ Option 2: Build with Batch (Windows only)

Double-click Build.bat or run:

Build.bat

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🛠 Usage in Your Project

Include the header and link against the compiled .lib / .a or source:

#include "BigInteger.h"

BigInteger a("123456789123456789");
BigInteger b("-987654321987654321");

BigInteger sum = a + b;
std::cout << "Sum = " << sum << '\n';

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🧪 Testing (Coming Soon)

Tests will be added under tests/. Once available:

cd build
ctest

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🤝 Contributing

Pull requests are welcome! For major changes, open an issue to discuss them first.

• Clean, readable C++14+ code
• Avoid STL features that break determinism or increase complexity
• Add unit tests for new operations

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📄 License

This project is licensed under the MIT License — free to use, modify, and distribute.

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🙏 Acknowledgements

Thanks to everyone exploring DSA and low-level arithmetic — you're building your own compiler-level logic! 🔢⚙️