List the rules for naming identifiers in C++ programming ?

1. Identifiers must begin with a letter (a-z, A-Z) or an underscore (_).
2. Identifiers can contain letters, digits (0-9), and underscores.
3. Identifiers are case-sensitive.
4. Identifiers cannot be a keyword or a reserved word in C++.
5. Identifiers should be meaningful and descriptive.
6. Identifiers should not start with two underscores or an underscore followed by a capital letter.
7. Identifiers should not contain special characters such as @, $, %, etc.
8. Identifiers should not be too long or too short, ideally between 1-31 characters.
9. Identifiers should follow a consistent naming convention, such as camelCase or snake_case.
10. Avoid using abbreviations or acronyms that may not be easily understood by others.