car.rb

class Car
    attr_reader :current_speed
    attr_reader :brand
    attr_reader :max_speed

    # use hash args because then you know what parameters are what when calling
    # the function.
    def initialize(args = {})
        @current_speed = args[:current_speed] || 0
        @brand = args[:brand] || "unknown"
        @max_speed = args[:max_speed] || 0
    end

    def accelerate
        @current_speed += 1
        puts "We're now cruising at: #{@current_speed}"
    end

    def drive
        puts "Buckle up, gramps."
        puts "Starting speed: #{@current_speed}"

        while @current_speed < @max_speed
            self.accelerate
            sleep 1
        end

        if @current_speed == @max_speed
            puts "I'm givin' her all she's got captain!"
        end
    end
end

class Camaro < Car
    def initialize(args = {})
        super(args)
        @brand = args[:brand] || "Chevy"
        @max_speed = args[:max_speed] || 200
    end
end

c = Camaro.new(current_speed: 190)
c.drive