How do void pointers work?

The void pointer in C is a pointer which is not associated with any data types. It points to some data location in the storage means points to the address of variables. In C, malloc() and calloc() functions return void * or generic pointers. …

How do you use void pointers and why do you use them?

void pointers should be used any time the contents of a block of data is not important. For example when copying data the contents of a memory area is copied but the format of the data is not important.

What do you mean by a void pointer is it possible to dereference a void pointer justify your answer?

You can not dereference a void pointer because it doesn’t have a type, first you need to cast it (int *)lVptr , then dereference it *(int *)lVptr . A void pointer is just that, a pointer to a void (nothing definable). Useful in some instances.

What is the advantage of void pointer in C?

Why we use void pointers? We use void pointers because of its reusability. Void pointers can store the object of any type, and we can retrieve the object of any type by using the indirection operator with proper typecasting.

What is void pointer and NULL pointer in C?

Void pointer is a specific pointer type. Null pointer is used for assigning 0 to a pointer variable of any type. Void pointer is used for storing address of other variable irrespective of its datatype.

When would you use it what does the error null pointer assignment means and what causes this error?

A NULL pointer assignment is a runtime error It occurs due to various reasons one is that your program has tried to access an illegal memory location. Illegal location means either the location is in the operating systems address space or in the other processes memory space.

How can dangling pointers be prevented?

The dangling pointer errors can be avoided by initializing the pointer to the NULL value. If we assign the NULL value to the pointer, then the pointer will not point to the de-allocated memory. Assigning NULL value to the pointer means that the pointer is not pointing to any memory location.

What is the difference between a general pointer and a void pointer?

A void pointer is nothing but the one who does not have any data type with it. It is also called as a general purpose pointer. It can hold the addresses of any data type.

What is the difference between void and null?

The difference between null and void as term for nothing stems from their place in physical space. A void is nothing but takes up space; null is nothing at all. In other words, you could measure a void but null offers nothing to measure. 4.1 Void is used to indicate that a function/method does not return any data type.