int main() { std::ifstream movie_data("data4movies.txt"); std::ifstream customer_data("data4customers.txt"); std::ifstream action_data("data4commands.txt"); if(!movie_data) { std::cout << "data4movies.txt could not be opened\n"; return 1; } if(!customer_data) { std::cout << "data4customers.txt could not be opened\n"; return 1; } if(!action_data) { std::cout << "data4commands.txt could not be opened\n"; return 1; } Store store; store.AddMovies(movie_data); store.AddCustomers(customer_data); store.ProcessActions(action_data); return 0; }