Optimization of Fibonacci Calculation Algorithm

[overinvest]

Description of Change

• Using a vector to store Fibonacci numbers: Instead of using two strings fibMinus1 and fibMinus2 to store the last two Fibonacci numbers, we used a vector. This made it possible to simplify the code and make it more readable.

• Optimization of the addition function: Instead of adding zeros to a shorter string, we just took this into account in the addition cycle, checking if the index is out of line.

• Using std::string::push_back and std::string::insert: Instead of concatenating strings, we used push_back and insert to add characters and strings. It's more efficient in terms of performance.

• Using std::to_string to convert numbers to strings: Instead of complex conversion of numbers to strings using ASCII codes, we used std::to_string.

Checklist

• Added description of change
• Added file name matches File name guidelines
• Added tests and example, test must pass
• Added documentation so that the program is self-explanatory and educational - Doxygen guidelines
• Relevant documentation/comments is changed or added
• PR title follows semantic commit guidelines
• Search previous suggestions before making a new one, as yours may be a duplicate.
• I acknowledge that all my contributions will be made under the project's license.

Notes: Optimized the Fibonacci calculation algorithm for better performance and readability.

[github-actions]

This pull request has been automatically marked as abandoned because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.