(a) What is a pointer? (b) What is a dereferencing operator?

(a)

What is a pointer?

(b) What is a dereferencing operator?

(c)

What is the difference between assignment statements p1 = p2; and *p1 = *p2;

(d) What is a dynamic variable?

(e)

What is the purpose of the new operator?

(f)

What is the purpose of the delete operator?

(g)

What is the freestore (also called the heap)?

(h)

What is the difference between dynamic variables and automatic variables?

Expert Solution

(a)   A pointer is an object that stores the memory address of another object.
(b)   Dereference operator is an operator which returns the value at the address which is pointed by the pointer. Dereference operator is *.
(c)   In p1 = p2, the value of p2 is getting assigned to p1, in *p1 = *p2, the dereferenced value of p2 is getting assigned to dereferenced values of p1, the second one deals with pointer objects.
(d)   The dynamic variable is a variable whose address is determined when the program is run.
(e) The new operator is used to dynamically allocate the memory for pointer objects.
(f)   delete operator is used to free the memory allocated by the new operator.
(g)   freestore is an area of memory that is used for dynamic allocation of memory while the program is running.
(h)   the dynamic variable is the variables which get its memory by the explicit call, while auto variable gets their memory assigned by the compiler automatically.

venereology answered 2 years ago

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(a) What is a pointer? (b) What is a dereferencing operator?

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