What is the difference between [type] const * and const [type] const *?

Question

C++ / C#

What is the difference between e.g. double const *ptr;and const double const *ptr;?

Answer 1

A very strange example.
There is no difference at all between and - both times const is applied to the type const [type]- this is the double application of const to the type, which will cause a compilation error. If const is after the asterisk, then the const operator is applied to the pointer. That is , equivalent options are also possible, and where const is applied to both the type and the pointer. In simple words: 1. If const refers to the type (before the asterisk), then the data pointer cannot be changed 2. If const refers to a pointer (after the asterisk), then you cannot change the pointer itself [type] const

Answer 2

https://www.cs.umbc.edu/courses/undergraduate/202/...

Answer 3

const for pointer or value

Answer 4

In addition to those already answered, I will give one more link on this topic.