Pointer: Pointer, the name itself references the purpose of the pointer. Pointers point to a location in memory. Pointer is a special type of variable to store the address of the memory location, which can be accessed later. If an asterisk “” operator is present before the variable, then that variable is referred as pointer variable. It is also called as dereferencing or indirection operator. Pointer is just a type of variable that stores the addresses of other variables. Using pointers, we can access the address of a variable; the data stored in that variable can be retrieved. Syntax of pointer variable declaration: <variable-type> <variable-name>; Constant pointer: Value that a constant pointer holds can be changed, whereas the address of the pointer variable holds cannot be changed is called as a “constant pointer”. Constant pointer is where the address hold by the pointer variables remains constant, whereas the value can change during the execution. Address of the pointer remains constant throughout the execution. Syntax of constant pointer: <variable-type> * const <variable-name>; Example: Consider the below constant pointer definition: double a = 12.32; double * const pointer = &a; In above statement, the variable “a” is defined with double value and it is pointed by a constant pointer “pointer”, which points to const double.

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Chapter 10, Problem 24RQE

Program Plan Intro

Pointer:

Pointer, the name itself references the purpose of the pointer. Pointers point to a location in memory.

Pointer is a special type of variable to store the address of the memory location, which can be accessed later.

If an asterisk “” operator is present before the variable, then that variable is referred as pointer variable.

It is also called as dereferencing or indirection operator.

Pointer is just a type of variable that stores the addresses of other variables.

Using pointers, we can access the address of a variable; the data stored in that variable can be retrieved.

Syntax of pointer variable declaration:

<variable-type> <variable-name>;

Constant pointer:

Value that a constant pointer holds can be changed, whereas the address of the pointer variable holds cannot be changed is called as a “constant pointer”.

Constant pointer is where the address hold by the pointer variables remains constant, whereas the value can change during the execution.

Address of the pointer remains constant throughout the execution.

Syntax of constant pointer:

<variable-type> * const <variable-name>;

Example:

Consider the below constant pointer definition:

double a = 12.32;

double * const pointer = &a;

In above statement, the variable “a” is defined with double value and it is pointed by a constant pointer “pointer”, which points to const double.

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