bubble sort a vector using iterators

sort_it.cpp

#include <iostream>
#include <vector>

int main()
{
    std::vector<int> num = {22, 1, 3, 4, 100, 4, 1, 6, 7};
    auto temp = 0, counter = 0;

    for(std::vector<int>::iterator it1 = num.begin(); it1 != num.end(); ++it1) {
        for(std::vector<int>::iterator it2 = num.begin() + (counter += 1); it2 != num.end(); ++it2) {
            if(*it2 > *it1) {
                temp = *it1;
                *it1 = *it2;
                *it2 = temp;
            }
        }
    }

    for(auto it = num.begin(); it != num.end(); ++it)
        std::cout << *it << std::endl;

    return 0;
}