By the way, I do not use size_t but you are free to: This is not
Unfortunately, "good" random number generators such as getrandom(2) or /dev/urandom aren't actually specified in POSIX (even though they are reasonably-widely available).，推荐阅读新收录的资料获取更多信息
。PDF资料对此有专业解读
A Wearable MIDI Controller That Responds to Gestures
clipboard. Solves the eternal terminal Emacs clipboard problem.，更多细节参见新收录的资料