Function problem_23

examples/99_problems.cpp:187–190

P23 (**) Extract a given number of randomly selected elements from a list.

// P23 (**) Extract a given number of randomly selected elements from a list.
void problem_23()
{
    print_result(sample(std::random_device()(), 3, xs));
}

// P24 (*) Lotto: Draw N different random numbers from the set 1..M.
void problem_24()