【概念】指针 1、概念 https://www.runoob.com/cprogramming/c-pointers.html 2、指针和引用的区别 https://www.zhihu.com/question/37608201 https://blog.csdn.net/l477918269/article/details/90233908 /*******相与枕藉乎舟中,不知东方之既白*******/