尝试ruby继承

class ParentClass
  def parent_method
    puts "This is a method from the parent class."
  end
end

class ChildClass < ParentClass
  def child_method
    puts "This is a method from the child class."
  end
end

parent = ParentClass.new
parent.parent_method

child = ChildClass.new
child.parent_method
child.child_method

This is a method from the parent class.
This is a method from the parent class.
This is a method from the child class.