c++ - dereferencing iterator of STL set -

I have a problem inheriting from STL set (I think):

Here's the square Prime:

  Class Prime: Public Set & lt; A & gt; {Private: // Private Data Member Public: // C'tor ... void printParticularA (const & amp; id); }   
 Here is the class A:  
  Category A: Public listing & lt; B & gt; {Private: // data member int id; Public: // C'tor A (Constant & Copy): List & lt; B & gt; (Copy), // copy data member {// validate data and leave exceptions if necessary}; The Bull Operator & lt; (Constant A & RA) const {Return id & lt; Rhs.id; } Void printReport () const (for const & amp; item: * this) {item.print (); }}}   
 Now this problem is in the next function, I want to print a particular object in the set:  
  Zero Prime :: Print Particular A (Constant and ID) (Find (Episode) - & gt; Printport ();}   
 I also tried to do this:  
  Zero Prime :: Print Particular A (Consultant and ID) {* (Find (Episode (ID)). Print the Report ();}   
 Note: Class b Rint () method. 
 Note 2: The preference is a class to create a dummy A object using only id data.  
 The problem is that when 'search' finds objects that it Const_iterator returns (because every object in the set is const), and when I dereference, I get a copy of the object (??), but the inside of the list is empty B.! - This is' - & gt; Version;  
 Now I know that the set is not allowed to change the objects. Gives, but I do not intend to change the object (as you can see in the announcement of printReport member function).  
 I appreciate any help in this!  
 EDIT: Thanks to everyone, you have helped me a lot in particular knowing what to do. 
 I solved the problem and this set was not in the list, nor was any of my classes presented here. Br> My mistake was to understand the question given to me (yes it is my homework assignment, I am still new to c ++). Sorry, if you think I was wasting my time. 
 I hope I can learn from all my experiences and help others someday! In short, thanks !! :)   
 
 
 Your code is very close and I do not see this problem tied directly or set to secondary. , But have completed the usual bad things  
 Get your session started for  
 Whatever will end your described problems, if not, then post a complete compiled example with the appropriate text of what you are looking for and what you expect.