--%>
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 Java PathFinder Java

    Java PathFinder: Java PathFinder (JPF) is a model checker that has been developed as a verification and testing environment for Java programs (Figure shown below). It is available as open source at SourceForge.net (JPF website). It consists of a custo

    		•
  • Q : Define the term Field Define the term

    Define the term Field: Variables stated within a class or interface, exterior of the methods. The fields are members of a class.

    		•
  • Q : Attatching CSS to HTML documents

    Explain the different ways in order to attach the CSS to HTML Documents?

    		•
  • Q : Describe Method Method : The portion of

    Method: The portion of a class definition which implements some of the behavior of objects of the class. The body of the method includes declarations of local variables and statements to execute the behavior. The method receives input through its argu

    		•
  • Q : What is Block Block : The statements

    Block: The statements and declarations are enclosed between a matching pair of curly brackets ({ and }). For example, a class body is a block, as it is a method body. The block surrounds a nested scope level.

    		•
  • Q : Intermediate language concept Describe

    Describe the term Intermediate language? Illustrate in brief.

    		•
  • Q : State Null character State Null

    State Null character: The \u0000 character. The care must be taken not to confuse this with null reference.

    		•
  • Q : Define the term Method signature Define

    Define the term Method signature: This is the synonym for method header.

    		•
  • Q : Define Data type Data type : There are

    Data type: There are 8 primitive data types in Java; five of such symbolize numerical types of changeable range and precision - float, double, int, long and short. The remaining three are employed to symbolizing single-bit values (that is, Boolean), s

    		•
  • Q : Fact table and dimension table describe

    describe the foreign key in fact table and dimension table

    		•