Dog = {
    name = "Jiro",
    age = 3,
    showProfile = function(self)
	prof = string.format("name=%s,age=%d",self.name,self.age)
	print(prof)
    end
}

Dog = {}
Dog.new = function(name, age)
    local obj = {}
    obj.name = name
    obj.age = age
    obj.showProfile = function(self)
	s = string.format("[name=%s,age=%d]",self.name,self.age)
	print(s)
    end
    return obj
end

jiro = Dog.new("jiro",3)
sabu = Dog.new("sabu",2)

jiro:showProfile()
sabu:showProfile()