What does casting to void pointer do?

A void pointer is a pointer that can point to any type of object, but does not know what type of object it points to. A void pointer must be explicitly cast into another type of pointer to perform indirection. A null pointer is a pointer that does not point to an address. A void pointer can be a null pointer.

Can you cast any pointer to a void pointer?

A pointer to void may be converted to or from a pointer to any incomplete or object type. A pointer to any incomplete or object type may be converted to a pointer to void and back again; the result shall compare equal to the original pointer. Again, it’s obvious that conversions to both directions are allowed.

Can you declare a void pointer in C?

A void pointer is nothing but a pointer variable declared using the reserved word in C ‘void’. 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.

Can you add to a void pointer?

You cannot perform arithmetic on a void pointer because pointer arithmetic is defined in terms of the size of the pointed-to object. Show activity on this post. Show activity on this post.

Why does malloc return void pointer?

Return Value malloc returns a void pointer to the allocated space, or NULL if there is insufficient memory available. To return a pointer to a type other than void , use a type cast on the return value.

Which of the following function returns a void pointer?

The malloc() and calloc() function return the void pointer, so these functions can be used to allocate the memory of any data type.

Which of the following cast operators can be used for converting a pointer of type void (*) () to void *?

How to convert a pointer of type void(*)() to void*

• const_cast.
• static_cast.
• dynamic_cast.
• reinterpret_cast.

Can we typecast void into int?

You’re return ing the value of int sum by setting a void * address to it. In this case, the address is not valid. But, if you keep that in mind and get the value of sum by casting a void * to int it will work.

How do you assign data to a void pointer?

Now, we want to assign the void pointer to integer pointer, in order to do this, we need to apply the cast operator, i.e., (int *) to the void pointer variable. This cast operator tells the compiler which type of value void pointer is holding.

How do you cast a pointer?

To cast a variable to another type:

1. use & to obtain a pointer to the type.
2. cast the pointer to the type to a pointer to the new type.
3. do any pointer arithmetic that is necessary.
4. dereference the pointer to obtain the type.

Is it better to use malloc () or calloc ()?

In malloc function, number of arguments is 1 while in calloc function, number of argument is 2. malloc() time efficiency is higher than calloc() whereas malloc() is not secure as compared to calloc() malloc does not initialize memory whereas calloc performs memory initialization.

How do I return a void pointer?

The malloc() and calloc() function return the void pointer, so these functions can be used to allocate the memory of any data type.

1. #include
2. #include
3. int main()
4. {
5. int a=90;
6. int *x = (int*)malloc(sizeof(int)) ;
7. x=&a
8. printf(“Value which is pointed by x pointer : %d”,*x);