Question

If a new type is declared whithin a class, like:

class foo {
public :
   struct s1 {
        int a ;
   };
private :
  struct s2 {
        int b ;
  };
};

then in what scope can the following statements be used:

s1 ss1;
s2 ss2;

Thanks in advance.

Answer 1

The type s1 can be used anywhere, but if used outside of foo’s member functions, it must be qualified:

foo::s1 ss1;

The type s2 can only be used in member functions of foo.