Review Questions

1:What's wrong with the following attempts at establishing friends? 
  1. class snap {
    friend clasp;
     ...
} ;
class clasp {  ... } ;

  2. class cuff {
public:
      void snip(muff &) {  ... }
      ...
} ;
class muff {
     friend void cuff::snip(muff &);
     ...
} ;

  3. 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) { } ...

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