Add the Content related to OOPs (C++)

[CoderGirl2844]

Select the Day of Content

Day 20

What information is missing?

C ++ being an Object-oriented programming language, a separate section for the content related to OOPs must be present which will be beneficial for the users to know more about the back end working of language
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[github-actions]

Thank you for creating this issue! We'll look into it as soon as possible. Your contributions are highly appreciated! 😊

[TheNikhilRaj]

I would like to work on this issue, please assign this to me.
@CoderGirl2844 @subhadipbhowmik