std::stack<T,Container>::pop
From cppreference.com
                    
                                        
                    
                    
                                                            
                    
|   void pop();  | 
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Removes the top element from the stack. Effectively calls c.pop_back()
Parameters
(none)
Return value
(none)
Complexity
Equal to the complexity of Container::pop_back.
See also
|    (C++11)  | 
   constructs element in-place at the top   (public member function)  | 
|    inserts element at the top   (public member function)  | |
|    accesses the top element   (public member function)  |