What is forwarding pointers?

Answer 1

A pointer is a programming tool that allows a value to be referenced. All data is allocated in memory and has a certain address attached to them. When you use a pointer, you are taking a value from an address called the reference. The original data is called the reference, and taking that value using a pointer is called dereferencing.

Example using Objective-C:

int anInt = 42; (anInt is stored in memory with the value of 42)

int *anIntPointer; (this is new datatype that wants to point to a certain address)

*anIntPointer = &anInt; (you are taking the pointer and dereferencing it to anInt. anytime you have a pointer [in this case denoted with an asterisk "*"], the reference will be noted with an ampersand "&")

Now there are also pointers to objects and structs that use an entirely different method, but same idea, the pointer grabs a referenced data value. This is especially valuable for referencing structures without having to reference every single member variable.

Answer 2

By analogy, an electronic pointing device such as the TrackPoint used on ThinkPad notebook computers, and similar devices on computers from other manufacturers.

In computer science, a pointer is a programming language datatype whose value refers directly to ("points to") another value stored elsewhere in the computer memory using its address. Obtaining the value that a pointer refers to is called dereferencing the pointer. A pointer is a simple implementation of the general reference datatype (although it is quite different from the facility referred to as a reference in C++).

Pointers are so commonly used as references that sometimes people use the word "pointer" to refer to references in general; however, more properly it only applies to data structures whose interface explicitly allows it to be manipulated as a memory address. If you are seeking general information on a small piece of data used to find an object.

The pointing icon on a computer screen that users control with input devices such as computer mouse or joystick.

Pointer: A pointer is a programming language datatype whose value refers directly to another value stored elsewhere in the computer memory using its address.

A pointer is an object that contains the address of another object.

int a; /* an object of type integer */

int *pa; /* an object of type pointer to integer */

pa = &a; /* initialization of the pointer, pa now "points to" a */

pa; /* reference to the pointer's value */

*pa; /* reference to the object's value */

Arrays and pointers are closely related, but that is not within the scope of the question.

Answer 3

Pointer are variable which stores memory address of another variable. That is the definition of pointers. but if you want to see the proper usage of pointers you must visit some C Programming site.

Answer 4

Pointer are variable to what store only address.

Advantages of pointers are:

Easy to implement in tree, list.

Enable pass by references.

Allow resize of data structure

enable us to allocate memory!

Answer 5

A pointer is a variable which is used to store address of a variable. They are used to point to another variable.

eg:-

int *p; // creates a pointer of integer type

int num; // an integer variable

p=# //pointer variable p is assigned with address of num

Answer 6

pointer is lwan variable whose value is address of another variable. i.e., direct address of memory allocation