Function main

Examples/Modules/Chapter 20/Ex20_13/Ex20_13.cpp:10–22

void printVector(const std::vector<int>& v); // Print the contents of a vector to std::cout

int main()
{
  const size_t num_numbers{20};

  const auto numbers{ fillSet_1toN(num_numbers) };

  std::vector<int> odd_numbers( numbers.size() ); // Caution: not { numbers.size() } here!
  auto end_odd_numbers{ std::copy_if(begin(numbers), end(numbers), begin(odd_numbers),
                                      [](int n) { return n % 2 == 1; }) };
  odd_numbers.erase(end_odd_numbers, end(odd_numbers));

  printVector(odd_numbers);
}

std::set<int> fillSet_1toN(size_t N)   // Fill a set with 1, 2, ..., N
{