std::queue::back
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   reference back(); 
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|   const_reference back() const; 
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Returns reference to the last element in the queue. This is the most recently pushed element. Effectively calls c.back().
Contents | 
[edit] Parameters
(none)
[edit] Return value
reference to the last element
[edit] Complexity
Constant
[edit] See also
|    access the first element   (public member function)  | 
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|    inserts element at the end  (public member function)  |