RPN

RPN

class RPNCalculator
  attr_accessor :calculator
  
  def initialize
    @calculator = []
    @num1 = 0
    @num2 = 0
  end
  
  def push(num)
    calculator << num
  end
  def value
    @value
  end
  def plus
    @num1 = calculator.pop
    @num2 = calculator.pop
    @value = @num1 + @num2
    calculator.push(@value)
  end
  
  def minus
    @num1 = calculator.pop
    @num2 = calculator.pop
    @value = @num2 - @num1
    calculator.push(@value)
  end
  
  def times
    @num1 = calculator.pop
    @num2 = calculator.pop
    @value = @num2 * @num1
    calculator.push(@value)
  end
  
  def divide
    @num1 = calculator.pop
    @num2 = calculator.pop
    @value = @num2 / @num1.to_f
    calculator.push(@value)
  end
  
end