Use case formulation

I was thinkering with the specs for a web service and this question popped into my head.

Should the following use case:

• A user can vote on other users' posts so to modify the latters' reputation
开发者_开发技巧

be split into two use cases?

• A user can vote other users' posts
• When a user gets voted, her reputation changes accordingly

Wich one is better formulated?

---

I'd go for the split option, this way you have way more control over each process and it's also easier to maintain.

---

Unless there is a case where you want them to happen independently I can't think of a reason to split them.