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

Padovan string, #question:-program to counts tha no of occurances of the st...

#question:-program to counts tha no of occurances of the string in the nth padovan string

Puzzles, #questioA Padovan string P(n) for a natural number n is defined as...

#questioA Padovan string P(n) for a natural number n is defined as: P(0) = ‘X’ P(1) = ‘Y’ P(2) = ‘Z’ P(n) = P(n-2) + P(n-3), n>2 where + denotes string concatenation. For a str

Accounts, Write a program to process bank accounts. Create a base class na...

Write a program to process bank accounts. Create a base class named Account and two derived classes named Savings and Checking. In the base class, use an int AccountNum and a dou

Function with unsigned char parameters, Write a function that has four uns...

Write a function that has four unsigned char parameters, combines the four one-byte integer values into an unsigned integer, and returns the unsigned integer. When the four one

How many non-boundary pits and peaks are on the map, Armed with your functi...

Armed with your function from above, we can do some interesting things. For instance, any pixel where the offsets are both zero is a pit (lower than all surrounding points) .

VS Project, Hi, I want to get rtsp source for windows

Hi, I want to get rtsp source for windows

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