说明：  同样对于指针变量的声明，因涉及到指针变量本身的存储位置和指针所指向的存储区位置不同而进行相应的存储区类型关键字的 使用如
(Same for pointer variable declaration, because involves the pointer variable itself and the location of the pointer is pointing to different storage location for the corresponding storage type keywords Using such as )