gistfile1.txt

template<std::size_t N>
std::vector<char*> string_array_to_charpp(std::array<std::string, N>& string_array)
{
  std::vector<char*> vs;
  vs.reserve(N);
  for (std::size_t i = 0; i < N; ++i) {
    vs.push_back(string_array.at(i).data());
  }
  return vs;
}

void main()
{
  // auto args = std::experimental::make_array<std::string>("test", "and", "other", "args");
  // I didn't find a way to infer N without using std::experimental.
  std::array<std::string, 4> args{"test", "and", "other", "args"};
  auto argv = string_array_to_charpp(args);
  QApplication app(args.size(), argv.data());
  ...
}