Void pointer confused me

Question

what is the actual purpose for void pointer if void pointer does not show the value for adress varible then why we use it. because we have no permission to perform any operation on it then why we use it .

Answer 1

As pointed out by Disvolviĝo;

You may wonder why and when you'd want to do that - Basically when you are dealing with generic data, or better compatibility with C code (e.g. malloc returns void pointers).

Answer 2

int a = 100;
void *ptr = &a;
cout << *(int*)ptr << endl; //100

If you cast it, you can use it.
It is used when you wanna receive any type variables.

Answer 3

it used to make generic functions
for example
sort() is generic in stdlib.h
it receives a pointer to function that takes two const void* l and returns int
like
int compare(const void*,const void*);

the same parameters and return type to several functions that compares two variables that we don't know how to compare them or what is the type of them

Answer 4

is it good to donot use void pointer or better way to typecast void pointer