What is the default type of class members in C++?

When no access permission is specified, the default access permission of members of a class in C is private and can only be accessed by member functions of the class. The reason is that private members help encapsulate data and prevent accidental access or modification of sensitive information. Exceptions include friend declarations and inheritance, where friends and derived classes can access private members, depending on the access rights of the base class.

The default type of members of a class in C

In C, when the access rights of class members are not explicitly specified When the Function access.

• Reason:

Private members help encapsulate data and prevent external code from accidentally accessing or modifying sensitive information.

Only the class itself knows how to properly manage its internal data, so private members enforce this rule.

Exception:

• Friend declaration

: Friend function or class can access private members of other classes, even if They are not members of the class.

Inheritance

: A derived class can access the private members of its base class if the base class has

protected
• (protected) or public (public) access rights.
• Other access permission types: In addition to private default access permissions, C also provides other types of access permissions:

Protected: Only member functions of this class and derived classes can access it.

Public

: Any code can access.

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