C语言中有符号/无符号数的左移和右移运算

参考：

https://blog.csdn.net/u012745229/article/details/51405332

https://blog.csdn.net/xiaoyue_/article/details/115220273?spm=1001.2101.3001.6650.1&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.no_search_link&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.no_search_link

https://blog.csdn.net/cg2258911936/article/details/103574604