Optional features: User-friendly design: Use clear and concise language throughout the program. Use a consistent and intuitive interface. Provide helpful feedback to the user. Make it easy for the user to navigate the program. Additional features: Allow the user to save their favorite orders. Provide recommendations for coffee drinks based on the user's preferences. Allow the user to order coffee drinks for delivery or pickup. Testing: Write unit tests for each function in the program. Perform integration testing to ensure that all of the components of the program work together correctly. Conduct user acceptance testing to get feedback from real users and identify any areas where the program can be improved