What is mean by 'char const * const c=" " '

Question

char const*const variablename = " ";

what does it mean?

is it same as pointer declaration?

Please anyone explain.

Thank you in advance!

const always goes to the item immediately to its *left* unless it is the lead decl, in which case it is the first item to its right. I.e. `const char *` and `char const *` are the same. That said, this is a const pointer to const char data variable called `variablename` that is initialized (and always will be) to a read-only char string consisting of one space and one null-terminator. — WhozCraig, Mar 19 '13 at 06:37
This question has been asked many times before; see also http://stackoverflow.com/questions/890535/what-is-the-difference-between-char-const-and-const-char http://stackoverflow.com/questions/4949254/const-char-const-versus-const-char http://stackoverflow.com/questions/6851436/difference-between-const-char-char-const-const-char-const-string-storage etc. — Adam Rosenfield, Mar 19 '13 at 06:38

score 6 · Accepted Answer · answered Mar 19 '13 at 06:35

6

It's a const pointer to a const C string. This means that neither the contents of the string, nor the pointer itself, can be changed.

answered Mar 19 '13 at 06:35

NPE

score 3 · Answer 2 · answered Mar 19 '13 at 06:36

3

const protects his left side, unless there is nothing to his left and only then it protects his right side.

Applying this to your example, it's a const pointer to a const String.

answered Mar 19 '13 at 06:36

Maroun

2 Answers2