--%>
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 : What is a Real-Time System What is a

    What is a Real-Time System?

    		•
  • Q : For creating a thread explain the limit

    For creating a thread explain the limit on per process.

    		•
  • Q : Define the term Sound card Define the

    Define the term Sound card: It is a hardware device employed to turn digital data into sound.

    		•
  • Q : Types of buffering supported by UNIX

    Explain different types of buffering which is supported by the UNIX?

    		•
  • Q : Create an applet of bounces in JAVA

    Create an applet that bounces a blue ball inside an applet using Thread.  The ball (diameter is 10) will start at position (0,0).  When the ball hits the edge of the applet, the ball should bounce off the edge at a randomly selected angle between 20 and 60 d

    		•
  • Q : Interface accessibility modifier Inside

    Inside the interface accessibility modifier we can use for methods?

    		•
  • Q : Define Formal argument Formal argument

    Formal argument: The definition of a method’s argument is the part of a method header. Each and every formal argument has an associated type. Whenever a method is called, the actual argument values are copied into the analogous formal arguments.

    		•
  • Q : Define Number base Number base : The

    Number base: The base employed to interpret the numerical characters. Binary notation is base 2 and decimal notation is base 10, for illustration.

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

    For loop: This is one of the Java's three control structures employed for looping. The other two are while loop and do loop. A for loop includes of a loop header and a loop body. The header comprises of three expressions separated by two semicolons an

    		•
  • 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

    		•