该类不包含数据成员，因此为空.标准要求每个班级至少有大小 1，所以这就是你得到的.(成员函数实际上并不在类内部"，它们实际上只是具有隐藏参数、命名空间和访问控制的***函数.)

The class contains no data members, so it's empty. The standard demands that every class have at least size 1, so that's what you get. (Member functions aren't physically "inside" a class, they're really just free functions with a hidden argument and a namespace and access control.)