C语言有符号数和无符号数的左移和右移

参考：https://blog.csdn.net/xiaohuihui1994/article/details/110498343?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-2-110498343-blog-104487521.pc_relevant_vip_default&spm=1001.2101.3001.4242.2&utm_relevant_index=5