--%>
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 : Explain Virtual memory Virtual memory :

    Virtual memory: It is computer will comprise a limited amount of real memory accessible to it. Programs frequently need more memory than the quantity of real memory. Moreover, in a multiprogramming system, various processes will be competing for simil

    		•
  • Q : Retrieve the text for ORA-12705 Normal

    Normal 0 false false

  • Q : What is Hash code Hash code : It is a

    Hash code: It is a value returned by a hash function. A hash code can be employed as an index into a random-access data structure, offering a proficient mapping between an object and its position. Employed by classes like HashMap.

    		•
  • Q : What does XSLT processing models include

    What does extensible style sheet language transformations processing models involve?

    		•
  • Q : What is Automation Testing life cycle

    What is Automation Testing life cycle?

    		•
  • Q : Define the term Case label Case label :

    Case label: The value utilized to select a specific case in a switch statement.

    		•
  • Q : What is Quotient Quotient: Whenever

    Quotient: Whenever integer division is executed, the outcome comprises of a quotient and a remainder. The quotient symbolizes the integer number of times which the divisor divides into the dividend. For example, in 5/3, 5 is the dividend and 3 is the

    		•
  • Q : Use of UpdateProgress control in AJAX

    What is the use of UpdateProgress control in AJAX?

    		•
  • Q : Define Object serialization Object

    Object serialization: The writing of an object's contents in such a manner that its state can be restored, either at a later time, or in a different procedure. This can be employed to store objects between runs of a program, or to transfer or shifts o

    		•
  • Q : What is Bounded repetition Bounded

    Bounded repetition: The Repetition where statements within a loop's body are executed a fixed number of times and the number of times is established whenever the loop began. There is no control structure in Java which guarantees the bounded repetition

    		•