Question7.28：Why doesn't sizeof tell me the size of the block of memory pointed to by a pointer?

那个谁

Q: Why doesn't sizeof tell me the size of the block of memory pointed to by a pointer?
A: sizeof tells you the size of the pointer. There is no portable way to find out the size of a malloc'ed block. (Remember, too, that sizeof operates at
compile time, and see also question 7.27.)

那个谁

问题：为什么sizeof不能告知我指针指向的内存块中的内存大小？
回答：sizeof告知的是指针的大小。没有什么可移植的办法得到malloc分配的内存块的大小（同时要记住，sizeof是在编译的时候起作用的，参考问题7.27）。

boyfaceone

翻译得不错。
现在也还是时不时地会犯错，以为sizeof(p)是指针所指的区域的大小，呵呵。