Explain the new and delete operators, C/C++ Programming

Assignment Help:

The new and delete operators

The C language has explained library functions- malloc() and free() for dynamic allocation and de-allocation of memory. C++ gives yet another approach to allocate blocks of memory - the new operator. This operator allocates memory for a given size and returns a pointer to its starting point. C++ also gives delete, to release the memory allocated by new. The pointer returned by the new operator require not be typecasted.

e.g.

                char arr[100];     // Compile_time allocation of an array

                char *arr;                             // Character pointer

arr = new char[size];                       //Run time allocation of an

                                                                //array. Size can be a

                                                                //constant or a variable.

In the above example, new returns a pointer to a block of size bytes. It is synonymous with declaring a character array. Though, declaring an array is an example of static binding - the array is built at the compile-time. This array remains in existence right from the beginning of the program to its end, even if not in use. While, the array declared by new operator can be allocated memory only when required and can be released when over with, using the delete operator. This is an example of dynamic binding.

 


Related Discussions:- Explain the new and delete operators

I need keylogger extension on chrome, Project Description: I want someon...

Project Description: I want someone to create and install a keylogger on a chrome browser. This could be a relatively simple job, please have experience with this type of work.

Write a haskell program, Write a Haskell program that calculates a balanced...

Write a Haskell program that calculates a balanced partition of N items where each item has a value between 0 and K such that the difference between the sum of the values of first

Palindrome, A palindrome is a string that reads the same from both the ends...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

Destruction of local object, Need assignment help What's the order that ...

Need assignment help What's the order that local objects are destructed?

Define difference among delete and delete[]?, when you allocate memory with...

when you allocate memory with new[], you ought to free the memory via delete[]. While you allocate memory along 'new', then use 'delete' with no the brackets. You employ new[] to a

Program, Define a class polynomial with three private data members a, b and...

Define a class polynomial with three private data members a, b and c of type double to represent the coefficient of two degree polynomial(ax^2+bx+c). Include a constructor in a pol

Pattern, enter height of the shape: 1 3 5 3 1 3 5 7 5 3 5 7 9 7 5 3 5 7...

enter height of the shape: 1 3 5 3 1 3 5 7 5 3 5 7 9 7 5 3 5 7 5 3 1 3 5 3 1

Explain the symbolic constants in c language, Explain the Symbolic Constant...

Explain the Symbolic Constants in c language? Symbolic constants are the constants of any type that declared by using the #define compiler directive and it is a preprocessor di

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd