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

C program to reverse the elements of array, C program to reverse the elemen...

C program to reverse the elements of array: #define rows 3 #define cols 3 void main() {                 int i=0,j=0;                 int arr[rows][cols];

Why can''t one open a file in a different directory , Why can't one open a ...

Why can't one open a file in a different directory like "..\test.dat"? A: Since " " is a tab character. You must employ forward slashes in your filenames, even on operating s

Develop capturing printer output apps using raspberry, In POS system, cashi...

In POS system, cashier computer connect to printer using serial rs232 usb or cable. We need to capture data from that connection, and parsing the data to get total amount for every

Search property from catalogue , Implement the search property from catalo...

Implement the search property from catalogue menu option.  After selecting this option the user should be asked to specify the property using the following sub-menu: 1. Specif

Lcm, lcm program.

lcm program.

What is abstraction in c++, Abstraction is of the process of hiding unwante...

Abstraction is of the process of hiding unwanted details from the user

Priority Queue, Ask question #Minimum 100 words acceptedEducational Objecti...

Ask question #Minimum 100 words acceptedEducational Objectives: After completing this assignment, the student should be able to accomplish the following: Apply generic algorithms i

Rules of function, Rules of function: Inline function created witho...

Rules of function: Inline function created without prototype it reduces the memory and it is used only for small function. Inline function cannot have recursion, static var

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