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Exercise 1

Create a superclass called Vehicle for your MyCar class to inherit from and move the behavior that isn't specific to the MyCar class to the superclass. Create a constant in your MyCar class that stores information about the vehicle that makes it different from other types of Vehicles.

Then create a new class called MyTruck that inherits from your superclass that also has a constant defined that separates it from the MyCar class in some way.

Solution

class Vehicle
  def self.gas_mileage(gallons, miles)
    puts "#{miles / gallons} miles per gallon of gas"
  end
end

class MyCar < Vehicle
  NUMBER_OF_DOORS = 4
end

class MyTruck < Vehicle
  NUMBER_OF_DOORS = 2
end

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