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free() Function in C Library With Examples

Last Updated: 29 May 2023

The free() function in C is used to free or deallocate the dynamically allocated memory and helps in reducing memory wastage. The C free() function cannot be used to free ...read more

C-Dynamic Memory Allocation

Static and Dynamic Memory Allocation in C

Last Updated: 23 April 2021

Memory is divided into smaller addressable units called bytes. Assume that these are small boxes as bytes. Each byte has its own address as per the below table.For example...read more

C-Dynamic Memory Allocation

Dynamic Memory Allocation

If memory allocation using new is failed in C++ then how it should be handled?

Last Updated: 20 July 2021

In this article, if memory allocation using new is failed in C++ then how it should be handled? When an object of a class is created dynamically using new operator, the ob ...read more

memory-management

C-Dynamic Memory Allocation

C++-new and delete

Similar Topics

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260+ articles

70+ articles

memory-management

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20+ articles

C++-new and delete

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what happens when you don't free memory after using malloc()

Last Updated: 05 October 2021

Pre-requisite: Dynamic memory allocation in CThe "malloc" or "memory allocation" method is used to dynamically allocate a single large block of memory with the specified s ...read more

C-Dynamic Memory Allocation

Memory leak in C++ and How to avoid it?

Last Updated: 16 June 2021

Memory leakage occurs in C++ when programmers allocates memory by using new keyword and forgets to deallocate the memory by using delete() function or delete[] operator. O ...read more

memory-management

C-Dynamic Memory Allocation

Sorting a dynamic 2-dimensional array of Strings

Last Updated: 27 March 2023

Prerequisite: How to dynamically allocate a 2D array in C?Double pointer: A pointer pointing to another pointer is known as a Double pointer. To represent the double point...read more

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Segmentation Fault in C/C++

Last Updated: 07 May 2023

Segmentation faults in C or C++ is an error that occurs when a program attempts to access a memory location it does not have permission to access. Generally, this error oc ...read more

C-Dynamic Memory Allocation

C | Dynamic Memory Allocation | Question 7

Last Updated: 28 June 2021

What is the problem with following code?[sourcecode language="C"]#includestdio.hint main(){ int *p = (int *)malloc(sizeof(int)); p = NULL; free(p);}[/sourcecode]( ...read more

C-Dynamic Memory Allocation

Dynamic Memory Allocation

C | Dynamic Memory Allocation | Question 8

Last Updated: 28 June 2021

Which of the following is/are true(A) calloc() allocates the memory and also initializes the allocates memory to zero, while memory allocated using malloc() has uninitiali ...read more

C-Dynamic Memory Allocation

Dynamic Memory Allocation

How to deallocate memory without using free() in C?

Last Updated: 21 October 2022

Question: How to deallocate dynamically allocate memory without using “free()” function. Solution: Standard library function realloc() can be used to deallocate previously ...read more

C-Dynamic Memory Allocation

Memory Layout of C Programs

Last Updated: 24 August 2022

A typical memory representation of a C program consists of the following sections.Text segment (i.e. instructions)Initialized data segmentUninitialized data segment (bss)H...read more

C-Dynamic Memory Allocation

system-programming

How does free() know the size of memory to be deallocated?

Last Updated: 28 May 2017

Consider the following prototype of free() function which is used to free memory allocated using malloc() or calloc() or realloc().[sourcecode language="C"] void free(voi ...read more

C-Dynamic Memory Allocation

Use of realloc()

Last Updated: 28 May 2017

Size of dynamically allocated memory can be changed by using realloc(). As per the C99 standard: [sourcecode language="C"] void *realloc(void *ptr, size_t size);[/sourcec ...read more

C-Dynamic Memory Allocation

Difference Between malloc() and calloc() with Examples

Last Updated: 23 June 2023

The functions malloc() and calloc() are library functions that allocate memory dynamically. Dynamic means the memory is allocated during runtime (execution of the program) ...read more

C-Dynamic Memory Allocation

What is Memory Leak? How can we avoid?

Last Updated: 21 September 2023

Memory leak occurs when programmers create a memory in a heap and forget to delete it.The consequence of the memory leak is that it reduces the performance of the computer ...read more

C-Dynamic Memory Allocation