#include <iostream>
#include <forward_list>
#include <string>
 
int main()
{
        std::forward_list<int> ints {1, 2, 4, 8, 16};
        std::forward_list<std::string> fruits {"orange", "apple", "raspberry"};
        std::forward_list<char> empty;
 
        // Sums all integers in the forward_list ints (if any), printing only the result.
        int sum = 0;
        for (auto it = ints.cbegin(); it != ints.cend(); it++)
                sum += *it;
        std::cout << "Sum of ints: " << sum << "\n";
 
        // Prints the first fruit in the forward_list fruits, without checking if there is one.
        std::cout << "First fruit: " << *fruits.begin() << "\n";
 
        if (empty.begin() == empty.end())
                std::cout << "forward_list 'empty' is indeed empty.\n";
}