How do I allocate memory dynamically using new in C++?

Asked by Last Modified  

Follow 2
Answer

Please enter your answer

Make your future bright with me!!!

Syntax to use new operator: To allocate memory of any data type, the syntax is: pointer-variable = new data-type; Example: int *p = new int
Comments

Experienced Computer trainer having worked in IT sector for 20 years.

The operating system uses dynamic memory allocation in C++ for dynamically allocated variables, for example, int* ptr = new int;, int* arr = new int;. Dynamically allocated memory does not get de-allocated until the program terminates. So, a programmer must de-allocate the memory, when it is no longer...
read more
The operating system uses dynamic memory allocation in C++ for dynamically allocated variables, for example, int* ptr = new int;, int* arr = new int[6];. Dynamically allocated memory does not get de-allocated until the program terminates. So, a programmer must de-allocate the memory, when it is no longer required. read less
Comments

Related Questions

What is the actual size of INT in the C language, 2 or 4 bytes?
The actual size to int is determined by the compiler as the program runs. But theoretically the size is 2 bytes. You can increase the size by adding keyword long infront of it to make the size 4 bytes. Eg int a; // 2 bytes Long int b; // 4 bytes
Kunal
What is the best IDE for C and C++ development?
If you're a student then Turbo C++ is best for C and C++ program + inbuilt C/C++ Graphics Function If you're a professional or working then Netbeans for C/C++ or Code:: Blocks is Best.
Balakrishnasingh

What is the main difference between returning value of a function and does not return any value of a function in  C. Which is correct void main(void), int main(void), int main(int) , or void main(int) and explain the main difference between int main() and int main(void). 

A function may or may not return a value to the calling function. If the function is returning a value, then you have to mention the data type in the function definition and funtion declaration (like int,...
Mahesh Kondawar
What is the syntex error?
A syntax error is a violation of the syntax, or grammatical rules, of a natural language or a programming language. ... A syntax error is called a fatal compilation error, because the compiler cannot translate...
Pranik
What are the toughest topics in C language?
1. pointer 2. dynamic memory allocation 3. File handling
Lokayya
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

C++ Program-Single Dimension Array
/* WAP to print sum and largest value in a single dimension array*/ //Header files #include<iostream.h>#include<conio.h> //Main function void main(){ //Array declaration int num,i,sum,large;...

Advantages of C++ Language
Advantages of C++ - C++ is a profoundly convenient dialect and is frequently the dialect of decision for multi-gadget, multi-stage application advancement. - C++ is a protest situated programming dialect...

PRACTISE makes you PERFECT ; ; ; There is no SUBSTITUTE for HARD WORK ;;;;Breathe SUCCESS like OXYGEN
Proper Planning ( reg what portions to be covered today) revising today's class portions & clarifying doubts solving Maths problems regularly ,noting down formulae separately trying to understand...

Do You Know Size Of Empty Class and Reason?
Size of empty class is always 1 byte. Reason is, in order to differentiate one object to another object, the size of empty class is always 1 byte. See the below c++ code snippet. Here there are three...

Contents Of C++ Programming
1. History of CPP 2. Concepts of OOP's 3. Introduction and Features of CPP (OOP's) 4. Characteristics of OOP's 5. CPP Keywords 6. Major Components of CPP: Encapsulation Inheritance Polymorphism 7....

Recommended Articles

Introduction C++ is an excellent programming language and many of the applications are written in C++ language. It has generic, object-oriented & imperative programming features, and also provides facilities for low-level memory manipulation. Successor of C language, it is an OOP (object oriented programming) language...

Read full article >

Business Process outsourcing (BPO) services can be considered as a kind of outsourcing which involves subletting of specific functions associated with any business to a third party service provider. BPO is usually administered as a cost-saving procedure for functions which an organization needs but does not rely upon to...

Read full article >

Almost all of us, inside the pocket, bag or on the table have a mobile phone, out of which 90% of us have a smartphone. The technology is advancing rapidly. When it comes to mobile phones, people today want much more than just making phone calls and playing games on the go. People now want instant access to all their business...

Read full article >

Software Development has been one of the most popular career trends since years. The reason behind this is the fact that software are being used almost everywhere today.  In all of our lives, from the morning’s alarm clock to the coffee maker, car, mobile phone, computer, ATM and in almost everything we use in our daily...

Read full article >

Looking for C++ Language Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you