C Vector Pop All

Assign vector content public member function pushback add element at the end public member function popback delete last element public member function insert insert elements public member function erase erase elements public member function swap swap content public member function clear clear content public member function emplace.

C vector pop all. Vectorpopback vectorpopback method is used to remove elements stored inside a vector. Check if the size of the vector is 0 if not increment the counter variable initialised as 0 and pop the back element. The element removed is the latest element inserted into the stack whose value can be retrieved by calling member stacktop. Iterators and references to the last element as well as the end iterator are invalidated.

Dont stop now and take your learning to the next level. Iterator validity the end iterator and any iterator pointer and reference referring to the removed element are invalidated. We will now get started with the different methods to remove elements from a vector. Calling popback on an empty container is undefined.

Because vectors use an array as their underlying storage erasing elements in positions other than the vector end causes the container to relocate all the elements after the segment erased to their. Removes the element on top of the stack effectively reducing its size by one. Removes the last element of the container. Removes last element from vector and reduces size of vector by one.

Inserts new element at the end of vector and increases size of. This effectively reduces the container size by the number of elements removed which are destroyed. Add elements to the vector using pushback function 2. Clear removes all the elements from a vector container thus making its size 0.

It reduces the container size by one and destroys the removed element. Iterators pointers and references referring to other elements that have not been removed are guaranteed to keep referring to the same elements they were referring to before the call. Repeat this step until the size of the vector becomes 0. Erase function on the other hand is used to remove specific elements from the container or a range of elements from the container thus reducing its size by the number of elements removed.

Removes from the vector either a single element position or a range of elements firstlast. This calls the removed elements destructor. All the elements of the vector are removed using clear function. Vectoroperator returns a reference to the element present at location n.