C++: Added section on Ternary Operators.

[hegdenischay]

Also changed the endl to "\n", because a tutorial needs to teach good practices.
I also fixed some minor errors in the grammar of the article.

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✅️ By submitting this PR, I have verified the following

• Added descriptive name to PR
  • Your PR should NOT be called Update index.md since it does not help the maintainer understand what has been changed.
  • For example, if you create a Variables article inside the Python directory, the pull request title should be Python: add Variables article.
  • Other examples are Git: edit Git Commit article or PHP: create PHP section and add Data Structures article
• Reviewed necessary formatting guidelines in CONTRIBUTING.md.
• No plagiarized, duplicate or repetitive content that has been directly copied from another source.

[hegdenischay]

I also have a question. This is one of the few articles I've seen where that footer is present. Is it really required?
This is the footer I'm talking about:

Camper , You now know what are tokens. The next article will be about CONGRATULATIONS
Good Luck to all of you
Happy Coding ! :)

[camperbot]

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[elaine-jackson]

Looks good to me 👍 Thanks for contributing ❤️