class Point
    def initialize( x, y )
        @x = x
        @y = y
    end
    
    #Create the default accessors for the x and y instance vars.
    attr_reader :x, :y
    attr_writer :x, :y
    
    def distance_from_origin
        return distance_from_point( Point.new(0,0) )
    end
    
    def distance_from_point( p )
        return Math.sqrt( (@x-p.x)*(@x-p.x) + (@y-p.y)*(@y-p.y) )
    end
    
end

a = Point.new(3,4)
b = Point.new(11,10)

puts a.distance_from_origin
puts a.distance_from_point(b)