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 remove vowels in sentence , C program to remove vowels in sent...

C program to remove vowels in sentence : void main() {                 char  str[100];                 int n;                 printf("enter string\n");

Explain different implementations of oop, Different implementations of OOP ...

Different implementations of OOP Object-oriented programming is not mainly concerned with the details of the program operation. Instead, it deals with the overall design of the

Program to calculate average of marks, Program for calculate average of tot...

Program for calculate average of total marks: #include using namespace std; void print(int marks_arr[],int cnt) { int ind[cnt]; int i=0; int j=0; int k=0;

Program to show the ascii value of characters, Program to show the ascii va...

Program to show the ascii value of characters: int main() {                 int one_char;                 cout                 one_char = getch();

Nonlinear least squares minimization, Estimation of the yield curve using n...

Estimation of the yield curve using nonlinear least squares minimization: The last part of this assignment asks you to construct the Nelson Siegel yield curve from observed bond pr

Algorithms, write an algorithm for multiplication of two sparse matrices us...

write an algorithm for multiplication of two sparse matrices using linked lists

Write a program that computes the cost of a long distance ca, Write a progr...

Write a program that computes the cost of a long distance call. The cost of the call is determined according to the following rate schedules. a. A call made between 8:00 AM and 6:

Area under curve, Write a program to find the area under the curve y = f(x)...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Program to compute quadratic polynomial, Write a function that computes f(x...

Write a function that computes f(x) for a quadratic polynomial in x, such as the one in assignment 3. Use the function to plot f(x) from -10 to +10.

Employee payroll, You are to write a C++ program which will compute the gro...

You are to write a C++ program which will compute the gross pay, Social Security Tax, Income Tax and net pay for an employee. The program needs to prompt for and read the employ

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