# simple auto accessor/mutator example
class Point
    attr_accessor :x, :y

    def initialize( x, y )
        @x = x
        @y = y
    end

    def to_s
        "(#{@x}, #{@y})"
    end
end

pt = Point.new( 10, 15 )
puts pt

pt.x = 5
pt.y = 3
puts pt

pt.x += 10
puts pt

# another example
class Person
    attr_reader :name
    attr_writer :age

    def initialize( name, age )
        @name = name
        @age = age
    end

    def to_s
        "#{@name}: #{@age} years old"
    end
end

# this is legal
user = Person.new( "bob", 21 )
puts user.name
user.age = 15
puts user

# this is not a legal statement
user.name = "George"