mayank

• Oct 4th, 2005

 

There are cases when you need to define a constant pointer to a variable/object; for instance, when taking a function address, or when you want to protect a pointer from unintended modifications such as assignment of new address, pointer arithmetic, etc.

Prasad

• Apr 27th, 2007

 

Constant pointer is NOT pointer to constant. Constant pointer means the pointer is constant. For eg:
Constant Pointer
int * const ptr2 indicates that? ptr2 is a pointer which is constant. This means that ptr2 cannot be made to point to another integer. However the integer pointed by ptr2 can be changed.



Where as a Pointer to constant is
const int * ptr1 indicates that ptr1 is a pointer that points to a constant integer. The integer is constant and cannot be changed. However, the pointer ptr1 can be made to point to some other integer.

neverd

 Profile Answers by neverd 

• Jun 8th, 2007

 

A pointer that cannot be changed to point other memory or object, however the value it points to can be changed.

pradeep kumar v.v.n.k

• Jun 9th, 2007

 

a const pointer means the pointer which represents the address of one value. so if you declare a pointer inside the function, it doesn't have scope outside the function. if it is also available to the outside function whenever we declare a pointer as const.

mansi Agrawal

 Profile Answers by mansi Agrawal 

• Apr 2nd, 2010

 

Const Pointer is that pointer which shows the one address on which the value is stored. Const pointer does not suppose to change te value once it assigned with the programme. If the pointer whose data type is constant is defined in a function, so this pointer has a scope within function. It is also again a constant pointer.

anandkumarjha

 Profile Answers by anandkumarjha Questions by anandkumarjha

• Aug 28th, 2010

 

Absolutely there is the vast difference between constant pointer and the pointer to a constant.it will be more clear with the examples of both the types.

CONSTANT POINTER:-int const *a...this means the pointer which points the variable can not be modified or changed rather it will point that variable fermanently but in case of pointer to a constnt const int *a:-this means that the pointer pointes to the constant variable and that variable can not be further modified.

Jegan Chakkravarthy

 Profile Answers by Jegan Chakkravarthy Questions by Jegan Chakkravarthy

• Jan 7th, 2011

 

An ordinary pointer variable preceeded with the "const" modifier. This prevents the value initialised from getting changed.