学步园

“指针常量” 和“常量指针” 很容易理解出问题（至少我是这样滴），感觉还是英文说的比较准确。

一篇讨论const 与指针的英文文章

http://www.codeguru.com/cpp/cpp/cpp_mfc/general/article.php/c6967/Constant-Pointers-and-Pointers-to-Constants.htm

如果懒得去仔细看英文，这里有个简单总结：

1. “指针常量”

     ==“指针本身是常量”

     =="指针保存的内容不能修改，即只能指向初始化时的变量"

     ==“constant pointer”

     ==“The location stored in the pointer cannot change. You cannot change where this pointer points”

     example:

     char *const myPtr;

2. “常量指针”

     =="指向常量的指针”

     ==“指针本身可以修改，但不能通过该指针修改指向的对象，即(*pointer)是不能修改的”

     ==“pointer to constant"

     =="You cannot use this pointer to change the value being pointed to"

     example:

     const char* myPtr;

over！