comparing containers

c.cpp

#include <iostream> /// std::cout; /// std::endl; 
#include <vector> /// std::vector <t>
#include <list> /// std::list <t>

int main ()
{
    std::list <int> il = {1, 3, 3, 4, 5};
    std::vector <int> v1 = {1, 2, 3, 22, 5};

    if (il.size() == v1.size()) { /// if the two containers are the same
        auto il_beg = il.begin(), il_end = il.end(); /// get the range of the list (denotes at the begin to end of last)
        auto v1_beg = v1.begin(), v1_end = v1.end(); /// get the range of the list (same)

        for (; il_beg != il_end && v1_beg != v1_end; ++il_beg, ++v1_beg) { /// compares each element in the two containers
            if (*il_beg == *v1_beg) {
                std::cout << "il at element: " << std::distance (il.begin(), il_beg) << " is equal to " /// gets the index number
                          << "v1 at element: " << std::distance (v1.begin(), v1_beg) << std::endl;
            }
            else {
                std::cout << "il at element: " << std::distance (il.begin(), il_beg) << " is not equal to "
                          << "v1 at element: " << std::distance (v1.begin(), v1_beg) << std::endl;
            }

        }

    } else { /// if the size of the two is not the same 
        std::cout << "not equal " << std::endl;
    }

    return 0;
}