Instructions

The new airport in Berlin hired you as a developer for their robots lab. They have clunky, somewhat humanoid-looking robots that they are trying to use to improve customer service.

Your first task on the job is to program the robot to greet people in their native language after they scanned their passports at the self-check-in counter.

The robot is proud of its abilities so it will always say which language it can speak first and then greet the person. For example, if someone scans a German passport, the robot would say:

1. Create the abstract greeting functionality

You need to structure your code so that you and other developers can easily add languages.

As a first step, define a trait Greeter with two functions.

• language_name which returns the language (a ByteArray) that the robot will use to greet the visitor.
• greet which accepts a visitor's name (a ByteArray) and returns the greeting message in a specific language (a ByteArray).

Next, implement a function say_hello that accepts the name of the visitor and something that implements the Greeter trait and returns the desired greeting (a ByteArray). For example, imagine a German Greeter implementation for which language_name returns "German" and greet returns "Hallo {name}!":

2. Implement Italian

Now make the robot work for people that scan Italian passports.

Create a struct Italian and implement the two functions to fulfill the Greeter trait from task 1. You can greet someone in Italian with "Ciao {name}!".

3. Implement French

Before you call it a day, you are supposed to add functionality to greet people in French.

Create a struct French and implement the two functions to fulfill the Greeter trait. You can greet someone in French with "Bonjour {name}!".