C Foundation

What is C? C Compiler Installation C Extensions C Compiler C Interpreter C Program Structure

C Basics

C Keywords C Data Types C Identifiers C Variables C Constant C Escape Sequences C Constant and Volatile C Typecast


What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

Basic IO's

Basic IO's C Formatted Functions C Unformatted Functions C Common Functions

Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement


What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop


What is Function C User Defined Functions C Recursion C Passing Parameters


Scope C Local Scope C Global Scope

Storage Classes

What is Storage Class C Auto C Extern C Static C Register


What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings


What is String C String Functions


What is Pointer C Pointers Arithmetic C Pointer to Pointer C Pointers and Arrays C Pointers and Strings C Pointer to Functions Void Pointers Null Pointers C Null and Void Pointer


What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def


What is Union


What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

Memory Allocation

What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

All ASCII Code Basic C Questions

C Interview

C Interview Sets All Star Patterns All Number Patterns All Alphabet Patterns All Series Patterns
The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

C Dynamic Memory Allocation

Why Dynamic Memory Allocation

Let us consider that you are starting your own company where you provide a different operating systems for your clients. You have 6 individual teams in your startup company where every team has their own individual part to program in a microprocessor. Unfortunately microprocessors are inbuilt with very small amount of memory. Now its your responsibility to allocate or divide certain amount of memory in the microprocessor to every individual teams. Here is the dynamic memory allocation in c programming to help you out there.

dynamic memory allocation in c

Facts About Dynamic Memory Allocation

  • DMA is the programmer's shorthand to represent Dynamic Memory Allocation.
  • Allocation of memory to a program is done at the time of execution.
  • A Pointer is the only way to access Dynamic Memory Allocation.

When To Use Dynamic Memory Allocation

When a programmer knows the exact size of the data, array is good choice. When a programmer have no idea about the size of the data, then you are left with one way is by using Dynamic Memory Allocation.

Inbuilt Functions For Dynamic Memory Allocation

In-Built Functions Purpose
malloc() Allocates memory where allocated memories are represented by some garbage value.
calloc(). Allocates memory where allocated memories are represented by zero.
free() To free the already allocated memory.
realloc() To reallocate the memory dynamically as per demand.
coreleft() To measure the unused memory.

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