Bowling Game: Array of Frames: Step 11

Here’s the refactored Score function, which is now a one-liner.

    int Score() const
    {
        return std::accumulate(std::begin(frames), std::end(frames), 0, [](int acc, const Frame& frame) { return acc + frame.Sum(); });
    }

It occurs to me that, if we move the precondition checks from the Game::Roll method to delegate to the Frame::Roll method, then I can make the Game::Roll method a one-liner, too. I like that, as most everything is delegated to the Frame class.

Let’s make that change and then click Next