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difference bw declerations

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0 0 votes 
1. const char *a;

      2. char* const a; 

      3. char const *a;

-Differentiate the above declarations.

2 Answers

1 1 vote
1. const char *a   :  a is a character pointer which is pointing to a constant character. It means value at address a can not be changed.

2. char * const a  : a is a character pointer which is pointing to a fixed address. It means a can not point to another address, but value at address a can be changed.

3. char const *a   : same as 1. (Pointer to a char const.). No semantic difference.
0 0 votes 
1. const char *a;
- here 'a' is a pointer to a constant charecter 
2. char* const a;

-  here 'a' is a constant pointer to a charecter 

 3. char const *a;

- same as 1

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