--%>
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 Little-endian Little-endian : It

    Little-endian: It is a common difference among machines is the order in which they store up the individual bytes of multi-byte numerical data. The little-endian machine stores the lower-order bytes prior to the higher-order bytes.

    		•
  • Q : Short lock in the tibco iProcess

    Describe the term short lock in the tibco iProcess in brief.

    		•
  • Q : Inheritance in Object Oriented

    Q. What is the use of making a method private inside

    		•
  • Q : Explain Upcast Upcast: It is a cast

    Upcast: It is a cast towards an object's ultimate super type - which is, `up' the inheritance hierarchy towards the Object class, for example:         // Upcast from VariableContr

    		•
  • Q : Security Manager on Applets Write down

    Write down some of the restrictions imposed by using a Security Manager on Applets?

    		•
  • Q : CORBA allows high performance

    'CORBA was designed to allow high performance distributed applications to be written’. Discuss. Definitely, ’CORBA was designed to allow high performance distributed applications to be written’ because it provides:

    		•
  • 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 : Tower of Hanoi Puzzle program using C#

    here I attached the assignment and examples of how can you do this assignments. I will post others in the next week as well.

    		•
  • Q : Different layers in Windows Architecture

    Explain how many different layers comprise in Windows Architecture?

    		•
  • Q : BAT files and shell scripts Using the

    Using the Web as a resource for your investigation, find out and explain what BAT files and shell scripts contain, and what they are used for. In the light of your findings, discuss why an operating system would provide both a graphical user interface

    		•