accessing vectors using iterators

vec_it.cpp

#include <iostream>
#include <vector>

int main()
{
    std::vector<int> v1 = {1};
    auto it1 = v1.begin();
    std::cout << *it1 << std::endl;

    std::vector<int> v2(10, 2);
    for(std::vector<int>::iterator it2 = v2.begin(); it2 != v2.end(); ++it2)
        std::cout << *it2 << std::endl;

    std::vector<int> v3(10, 42);
    for(auto it3 = v3.begin(); it3 != v3.end(); ++it3)
        std::cout << *it3 << std::endl;

    std::vector<int> v4{10};
    for(std::vector<int>::iterator it4 = v4.begin(); it4 != v4.end(); ++it4)
        std::cout << *it4 << std::endl;

    std::vector<int> v5{10, 42};
    for(auto it5 = v5.begin(); it5 != v5.end(); ++it5)
        std::cout << *it5 << std::endl;

    std::vector<int> v6{10};
    for(std::vector<int>::iterator it6 = v6.begin(); it6 != v6.end(); ++it6)
        std::cout << *it6 << std::endl;

    std::vector<std::string> v7{10, "hi"};
    for(std::vector<std::string>::iterator it7 = v7.begin(); it7 != v7.end(); ++it7)
        std::cout << *it7 << std::endl;

    return 0;
}