--%>
Assignment Help - homework help

New Operator and Delete Operator

New operator: It allows dynamic storage allocation. It throws an exception if memory allocation fails. The general format of new operator is return type, pointer to data type.

The C++ statement

Allocates memory to variable ptrvar dynamically of specified data type and specified size. The operator new allocates a specified amount of memory during run time and returns a pointer to that memory allocation. It compares the size of memory allocated by

Size of (data type) * integer type size;

Where data type can be a standard data type or a user defined data type, integer size can be an integer expression, which specifies the number of element in the array. The new operators returns the NULL, if memory allocation is unsuccessful

Example:   Int * a = new (100);

It creates a memory for an integer and initializes it with 100.

Delete operator: This is used to return the memory allocated by new operator back to the memory pull. Memory thus released will be reused for other part of programme. Although memory allocated by is returned automatically to the system. When the programme terminates it is safer to use this operator explicitly within the pointer. This is absolutely necessary in situations where local variable pointing to the memory get destroyed when the function terminates leaving memory inaccessible to the rest of the delete operator is-

Deal locates the memory allocates to ptrvar. By de allocating the memory, the pointer variable does not get deleted and the address value stored in it does not change. However this address become invalid, as the returned memory will be used up for storing entirely different data. 

   Related Questions in Programming Languages

  • Q : Define the term Swizzling Define the

    Define the term Swizzling: It is the process of recursively writing the contents of an object through object serialization.

    		•
  • Q : Explain the way to write the opening

    Explain the way to write the opening tag of an XHTML element.

    		•
  • Q : Define Loop variable Loop variable : A

    Loop variable: A variable employed to control the operation of a loop, like a for loop. Usually, a loop variable will be provided an initial value and it is then incremented after each and every iteration till it passes or reaches a terminating value.

    		•
  • Q : Define Race hazard Race hazard : It is

    Race hazard: It is a situation which occurs between multiple threads sharing a resource. The race hazard occurs whenever one thread's suppositions regarding the state of a resource are invalidated by the actions of the other thread.

    		•
  • Q : What is Application programming

    Application programming interface (API): It is a set of definitions that you can make use of it in writing programs. In the perspective of Java, these are the classes, packages, and interfaces which can be utilized to build complex ap

    		•
  • Q : Self-created What is the difference

    What is the difference among a self-created certificate, Symbian Signed and a Symbian developer certificate?

    		•
  • Q : What is Leverage Model-Based Design

    Leverage Model-Based Design: Model-based design provides useful hints of how a large system can be reduced so that its state space becomes searchable. If not inherently visible in the design (for example, by means of using a “State” design

    		•
  • Q : Explain Do loop Do loop : This is one

    Do loop: This is one of Java's three control structures employed for looping. The other two are the for loop and while loop. A do loop comprises of a loop body and a Boolean expression. The condition is tested subsequent to the loop body has been fini

    		•
  • Q : What is a Method body What is a Method

    What is a Method body: It is a body of a method: everything within the outermost block of the method.

    		•
  • Q : Perform Exception Handling with

    On occasion, some of Brewbean’s customers mistakenly leave an item out of a basket already checked out, therefore they create a new basket containing the missing items. Though they request that the baskets be combined and hence they are not charged extra shippin

    		•