(sancheck失败，checksum成功)
feeling towards oop c++ so far:
anything can be anywhere and why is that payload stuffed into the constructor?! why in the world do you want to bundle instantiation with payload, or, if it’s just oneshot work then why not call that payload directly without building an inheritance hell
feeling towards oop c++ so far:
@pi 学了一学期，最想问的是：class 里这么一大堆东西，真的有必要吗 
@fulkrum @pi 看来是上工的时候在摸鱼
反正感觉 it creates more problems that it solves