Function main

Exercises/NoModules/Chapter 20/Soln20_09/Soln20_09.cpp:21–37

}

int main()
{
  const size_t num_numbers{ 25'000 };
  std::vector<int> numbers(num_numbers);

  /* Caution: a pseudo-random number generator cannot safely be accessed concurrently! */
  auto generator{ createUniformPseudoRandomNumberGenerator(0, 10'000) };
  std::ranges::generate(numbers, std::ref(generator));

  // Algorithm number two
  std::sort(std::execution::par, begin(numbers), end(numbers));

  // And number three; this time combined with the remove-erase idiom (or unique-erase, if you will)
  numbers.erase(std::unique(std::execution::par, begin(numbers), end(numbers)), end(numbers));

  std::cout << "Number of unique numbers: " << numbers.size() << std::endl;
}