1.sizeof用法(1)传送门:https://blog.csdn.net/u012520854/article/details/53511154
(2)传送门:https://blog.csdn.net/jollyhope/article/details/1895357
(3)参数为结构体的时候-传送门:https://blog.csdn.net/peixuan197/article/details/481623532.malloc的用法-传送门:https://www.cnblogs.com/wenbo4399/p/8626203.html