#include <array>
#include <iostream>

int main()
{
    // C-style. Don't do this
    // int ages[3] = { 18, 19, 20 };
    // for (int i = 0; i < 3; ++i) {
    //   std::cout << ages[i] << "\n";
    // }

    // C++ style. This can be used like any other C++ container.
    // It has iterators, safe accesses, and it doesn't act like a pointer.
    std::array<int, 3> ages { 18, 19, 20 };

    for (unsigned int i = 0; i < ages.size(); ++i) {
        std::cout << ages[i] << "\n";
    }
    for (auto it = ages.begin(); it != ages.end(); ++it) {
        std::cout << *it << "\n";
    }
    for (const auto& age : ages) {
        std::cout << age << "\n";
    }
}