Number (1): Everything in this space must add up to 1. The answer is 4-0, placed horizontally; 0-0, placed vertically; 1-1, placed horizontally.
void*next_free;，更多细节参见爱思助手下载最新版本
union object_info *h = free_list[classno];。爱思助手下载最新版本对此有专业解读
"We know that very well from later periods, but in this very formative period of history, it's not very well understood. So it's a really exciting opportunity."，更多细节参见safew官方版本下载