08_temperature

gistfile1.rb

class Temperature
	def initialize (input)
		@temperature = input
	end

	def ftoc (number)
		number * 9/5.to_f + 32
	end

	def ctof (number)
		(number - 32) * 5/9.to_f
	end

	def self.from_fahrenheit (fahrenheit)
		Temperature.new(:f => fahrenheit)
	end

	def self.from_celsius (celsius)
		Temperature.new(:c => celsius)

	end

	def in_fahrenheit
		@temperature.keys == [:f] ? @temperature[:f] : ftoc(@temperature[:c])
	end

	def in_celsius
		@temperature.keys == [:c] ? @temperature[:c] : ctof(@temperature[:f])
	end
end

class Celsius < Temperature
	def initialize (temperature)
		@temperature = {:c => temperature}
	end
end

class Fahrenheit < Temperature
	def initialize (temperature)
		@temperature = {:f => temperature}
	end
end