如何区分 const char * p, char * const p, const char * * p

C++之父Bjarne在他的《The C++ Programming Language》里面给出过一个助记的方法： 
把一个声明从右向左读。 遇到 * 读成 pointer to。估计C编译器也是按照这个方法来解析的。
char ** p1; 
// pointer to pointer to char 
const char **p2; 
// pointer to pointer to const char 
char * const * p3; 
// pointer to const pointer to char 
const char * const * p4; 
// pointer to const pointer to const char 
char ** const p5; 
// const pointer to pointer to char 
const char ** const p6; 
// const pointer to pointer to const char 
char * const * const p7; 
// const pointer to const pointer to char 
const char * const * const p8; 

// const pointer to const pointer to const char

http://blog.csdn.net/smstong/article/details/49049661