C++ Primer Plus, Fourth Edition

Review Questions

1:	What's wrong with the following attempts at establishing friends? class snap { friend clasp; ... } ; class clasp { ... } ; class cuff { public: void snip(muff &) { ... } ... } ; class muff { friend void cuff::snip(muff &); ... } ; class muff { friend void cuff::snip(muff &); ... } ; class cuff { public: void snip(muff &) { ... } ... } ;
2:	You've seen how to create mutual class friends. Can you create a more restricted form of friendship in which only some members of class B are friends to class A and some members of A are friends to B? Explain.
3:	What problems might the following nested class declaration have? class Ribs { private: class Sauce { int soy; int sugar; public: Sauce(int s1, int s2) : soy(s1), sugar(s2) { } ...