std::vector::data
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   T* data();  | 
(since C++11) | |
|   const T* data() const;  | 
(since C++11) | |
Returns pointer to the underlying array serving as element storage. Specifically the pointer is such that range [data(); data() + size()) is valid even when empty() returns true.
Contents | 
[edit] Parameters
(none)
[edit] Return value
Pointer to the underlying element storage.
[edit] Complexity
Constant.
[edit] Exceptions
[edit] See also
|    access the first element   (public member function)  | |
|    access the last element   (public member function)  | |