Question: 22. Describe the difference between making a class a member of another class (object aggregation), and making a class a friend of another class. 23.

22. Describe the difference between making a class a member of another class (object aggregation), and making a class a friend of another class.

23. What is the purpose of a forward declaration of a class?

24. Explain why memberwise assignment can cause problems with a class that contains a pointer member.

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