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Whats the difference between “public:”, “private:”, and “protected:”?

April 26, 2017difference private protected public

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Whats the difference between “public:”, “private:”, and “protected:”?

3 Answers

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* A member (either data member or member function) declared in a private: section of a class can only be accessed by member functions and friends[14] of that class * A member (either data member or member function) declared in a protected: section of a class can only be accessed by member functions and friends[14] of that class, and by member functions and friends[14] of derived classes * A member (either data member or member function) declared in a public: section of a class can be accessed by anyone ================================================== ============================

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“Private:” is discussed in the previous section, and “public:” means “anyone can access it.” The third option, “protected:”, makes a member (either data member or member fn) accessible to subclasses.

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• A member (either data member or member function) declared in a private section of a class can only be accessed by member functions and friends of that class • A member (either data member or member function) declared in a protected section of a class can only be accessed by member functions and friends of that class, and by member functions and friends of derived classes • A member (either data member or member function) declared in a public section of a class can be accessed by anyone [ Top | Bottom | Previous section | Next section | Search the FAQ ]