The indirection operator (*) - dereference operator.

By: Emiley J Emailed: 1696 times Printed: 2193 times    

Latest comments
By: rohit kumar - how this program is work
By: Kirti - Hi..thx for the hadoop in
By: Spijker - I have altered the code a
By: ali mohammed - why we use the java in ne
By: ali mohammed - why we use the java in ne
By: mizhelle - when I exported the data
By: raul - no output as well, i'm ge
By: Rajesh - thanx very much...
By: Suindu De - Suppose we are executing

The indirection operator (*) is also called the dereference operator. When a pointer is dereferenced, the value at the address stored by the pointer is retrieved.

Normal variables provide direct access to their own values. If you create a new variable of type unsigned short int called yourAge, and you want to assign the value in howOld to that new variable, you would write

unsigned short int yourAge;
yourAge = howOld;

A pointer provides indirect access to the value of the variable whose address it stores. To assign the value in howOld to the new variable yourAge by way of the pointer pAge, you would write

unsigned short int yourAge;
yourAge = *pAge;

The indirection operator (*) in front of the variable pAge means "the value stored at." This assignment says, "Take the value stored at the address in pAge and assign it to yourAge."

NOTE: The indirection operator (*) is used in two distinct ways with pointers: declaration and dereference. When a pointer is declared, the star indicates that it is a pointer, not a normal variable. For example,

unsigned short * pAge = 0; // make a pointer to an unsigned short

When the pointer is dereferenced, the indirection operator indicates that the value at the memory location stored in the pointer is to be accessed, rather than the address itself.

*pAge = 5; // assign 5 to the value at pAge

Also note that this same character (*) is used as the multiplication operator. The compiler knows which operator to call, based on context.

C++ Home | All C++ Tutorials | Latest C++ Tutorials

Sponsored Links

If this tutorial doesn't answer your question, or you have a specific question, just ask an expert here. Post your question to get a direct answer.

Bookmark and Share


Be the first one to add a comment

Your name (required):

Your email(required, will not be shown to the public):

Your sites URL (optional):

Your comments:

More Tutorials by Emiley J
Password must include both numeric and alphabetic characters - Magento
What is Hadoop?
Returning multiple values from a web service
Tomcat and httpd configured in port 8080 and 80
Java Webservices using Netbeans and Tomcat
Java WebService connected to Database
How to Deploy a Java Web Service
Call a webservice in Java
Java WebService - Create your first web service in Java
package javax.jws does not exist
Getting Started with Android
HTML5 Location - getCurrentPosition() in HTML5
HTML5 Canvas - Using Canvas in HTML5
HTML5 - Introduction
HTML5 Video - Handling video in HTML5

More Tutorials in C++
Two-Dimensional Array Manipulation in C++
Calculate average using Two-Dimensional Array in C++
Compute the square root of the sum of the squares of an array in C++
Matrix using nested for loops in C++
Sorting an array of Strings in C++
Calculating total based on the given quantity and price in C++
Compiling and Linking Multiple Source Files in C++
Enumerations in C++
Program to add two numbers in C++
Comments in C++
while loop in C++
for loop in C++
Programming errors a compiler will detect in C++
if in C++
Using the Built-in Arithmetic Types in C++

More Latest News
Most Viewed Articles (in C++ )
Dot (.) vs Arrow (->) to access data members in C++
Using Comments in a C++ Program
The indirection operator (*) - dereference operator.
assert() example program in C++
Using cout.fill() in C++
Reverse a String in C++
Difference between Procedural, Structured, and Object-Oriented Programming
Demonstration of Prefix and Postfix operators in C++
Constructors and Destructors in C++
while Loops in C++
while (1) Loops in C++
Using switch Statements in C++
Stray or Dangling Pointers in C++
C ++ Reference Parameters Versus Java Reference Parameters
Converting C++ Multiple-Inheritance Hierarchies to Java
Most Emailed Articles (in C++)
Using cout in C++
Demonstration of Prefix and Postfix operators in C++
qsort() sample program in C++
Using #define, The Preprocessor and the Compiler in C++
Escape Sequences for Nonprintable Characters in C++
A Brief History of C++
C++ and Object-Oriented Programming
Use of Conditional (Ternary) Operator in C++
Returning values from a function in C++
Constructors and Destructors in C++
Interface Versus Implementation in C++
The Stack and the Free Store in C++
this Pointer in C++
How to handle Exceptions in C++
Using cout.width() in C++