BigInteger

In C/C++ the number of digits a long long int can have is a maximum of 20. And the question is to store the 22 digit number which is not easy to store in any kind of primitive type.so i designed a datatype called "BIGINT", a few basic operations are being implemented on the new data type. This project is an implementation of a Big Integer class in C++ that can handle very large numbers, far exceeding the standard data types in C++. The code defines a custom class BigInt that supports a wide range of arithmetic operations like addition, subtraction, multiplication, division, modulo, exponentiation, and even more complex functions like calculating Fibonacci numbers, Catalan numbers, and factorials.

Here's a summary of how the code works:

1. BigInt Class Construction: The BigInt class can be constructed from various types of inputs, including strings, integers, and other BigInt objects. It stores the digits of the number in reverse order to simplify arithmetic operations.

2. Arithmetic Operations: The class overloads many operators (e.g., +, -, *, /, ==, <, etc.) to perform arithmetic operations between big integers. These operators are carefully implemented to handle the unique challenges of working with large numbers.

3. Increment/Decrement Operations: The class supports pre and post-increment (++) and decrement (--) operations, allowing for easy manipulation of the numbers.

4. Advanced Functions: The code includes functions for computing the square root, power, Fibonacci sequence, Catalan numbers, and factorials using BigInt. These functions demonstrate the power and flexibility of the class, enabling calculations that would be impossible with standard data types.

5. Input/Output Operations: The class includes functions for reading from and writing to streams, making it easy to input large numbers from the user or print them to the console.

6. Driver Code: The main function includes examples of how to use the BigInt class. It shows how to perform various operations, compare numbers, and compute advanced mathematical functions. This part of the code is crucial for testing and demonstrating the capabilities of the BigInt class.