Pointers

Question

What is the difference between null pointer and void pointer ?? which one  is used when ?

Comments

https://stackoverflow.com/questions/3581585/whats-the-difference-between-a-null-pointer-and-a-void-pointer

Answer 1

Null pointers and void pointers are completely different from each other

To overcome from Wild pointer ( pointer which has not been initialized to anything (not even NULL))use Null pointer. A Null Pointer is a pointer which  is pointing to NULL means nothing. .Null pointer mainly used in Data structure .

A void pointer is known as generic pointer, which can refer to variables of any data type.When a pointer variable is declared using keyword void – it becomes a general purpose pointer variable. Address of any variable of any data type (char, int, float etc.)can be assigned to a void pointer variable.

Comments

Awsome explanation thank you so much @Deepak kumar

Answer 2

NULL POINTER

suppose u initialise any pointer with any data type then it will create a pointer which will pointing to some memory location may be

in some important part of operating system  where some important instructions or information present , so if there is any changes in

that location may create some big problem in running the system so to protect from these kind of problem there is use of null pointer

which initialise with null address

syntax:

int * a= NULL;

a pointing no where

Comments

oops forget about void pointer

VOID pointer:

it is a generic pointer .

which is used with every kind of datatype only the thing is that u need to typcast it beforev using

syntax:

void *a=null;

int c;

char b;

float m;

a=(int *) &c;

a=(char*) &b;

a=(float *) &m;

hope it help :)

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nice explanation ,thank you so much for this indepth insight @akashdewangan24

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so i can conclude in simple terms as null pointer is simple a value which is nothing but 0 whereas void pointer is a type which has the ability to point to any type of pointer (int char float ) this is the reason this void pointer is used as a generic pointer type .

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Yup exactly