std::erase

e_o.cpp

#include <iostream>
#include <list>
#include <vector>

int main ()
{
    int ia[11] = {0, 1, 1, 2, 3, 5, 8, 13, 21, 55, 89}; /// declare and define ia as int array that has a size of 11 (built in array)

    std::list <int> lst (std::begin(ia), std::end(ia)); /// initialize a value range from one past to the end of the array
    std::vector <int> v1 (std::begin(ia), std::end(ia)); /// same

    auto it1 = lst.begin (); /// stores the iterator from lst
    auto it2 = v1.begin (); /// stores the iterator from v1

    while (it1 != lst.end()) { /// deletes odd values
        if (*it1 % 2)
            it1 = lst.erase (it1);
        else
            ++it1;
    }

    while (it2 != v1.end()) { /// deletes even values
        if (*it2 % 2)
            ++it2;
        else
            it2 = v1.erase (it2);
    }

    std::cout << std::endl;
    std::cout << "lst:" << std::endl;

    for (auto i : lst) /// displays the elements in lst
        std::cout << i << " ";


    std::cout << std::endl;
    std::cout << "v1" << std::endl;

    for (auto ii : v1) /// displays the elements in v1
        std::cout << ii << " ";

    return 0;
}