Function main

Exercises/NoModules/Chapter 16/Exer16_06/Exer16_06.cpp:17–52

void print(std::ostream& stream, const Customer& customer);   // Print a given customer to a given output stream

int main()
{
  auto* connection{ db_connect() };
  try
  {
    auto* result{ db_query(connection, "SELECT * FROM CUSTOMER_TABEL") };
    if (!result)
    {
      db_disconnect(connection);
      throw DatabaseException{"Query failed"};
    }
  
    std::vector customers{ readCustomers(result) };
  
    if (customers.empty())
    {
      std::cerr << "No customers found?" << std::endl;
      return 2;
    }
    
    for (auto& customer : customers)
    {
       print(std::cout, customer);
    }
  
    db_free_result(result);
  }
  catch (std::exception& caught)
  {
    std::cerr << caught.what() << std::endl;
    return 1;
  }
  
  db_disconnect(connection);
  return 0;
}

std::vector<Customer> readCustomers(DB_QUERY_RESULT* result)
{