Can a void pointer point to any type of data?

Can a void pointer point to any type of data?

void pointer in C / C++ A void pointer is a pointer that has no associated data type with it. A void pointer can hold address of any type and can be typcasted to any type.

Can we assign a void pointer to an int type pointer?

We have learned in chapter Pointer Basics in C that if a pointer is of type pointer to int or (int *) then it can hold the address of the variable of type int only. A void pointer can point to a variable of any data type and void pointer can be assigned to a pointer of any type. …

How do you get pointer to value pointed?

When you place an asterisk in front of a pointer you will get the value at the memory address pointed to.

What can a void pointer point to?

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.

How do we reference the pointed data of a void pointer?

Let’s see the below example.

1. #include
2. int main()
3. {
4. int a=90;
5. void *ptr;
6. ptr=&a
7. printf(“Value which is pointed by ptr pointer : \%d”,*ptr);
8. return 0;

What is a void pointer when is a void pointer used?

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. It is also called general purpose pointer. In C, malloc() and calloc() functions return void * or generic pointers.

How do I print the value of a void pointer?

Output

1. #include
2. int main()
3. {
4. int a=90;
5. void *ptr;
6. ptr=&a
7. printf(“Value which is pointed by ptr pointer : \%d”,*(int*)ptr);
8. return 0;

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….Difference between void pointer in C and C++

1. #include
2. int main()
3. {
4. void *ptr; // void pointer declaration.
5. int *ptr1; // integer pointer declaration.

How do I access pointer data?

To access address of a variable to a pointer, we use the unary operator & (ampersand) that returns the address of that variable. For example &x gives us address of variable x.

What is -> mean in C++?

The -> is called the arrow operator. Simply saying: To access members of a structure, use the dot operator. To access members of a structure through a pointer, use the arrow operator.

Can we delete void pointer in C++?

Void pointer is a pointer which is not associate with any data types. It is not safe to delete a void pointer in C/C++ because delete needs to call the destructor of whatever object it’s destroying, and it is impossible to do that if it doesn’t know the type.

What is a void pointer and a null pointer?

A null pointer points has the value NULL which is typically 0, but in any case a memory location which is invalid to dereference. A void pointer points at data of type void. The word “void” is not an indication that the data referenced by the pointer is invalid or that the pointer has been nullified.

What is a void pointer in C language?

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. It is also called general purpose pointer. In C, malloc() and calloc() functions return void * or generic pointers. It has some limitations −

Can a pointer of type int hold a float variable?

We have learned in chapter Pointer Basics in C that if a pointer is of type pointer to int or (int *) then it can hold the address of the variable of type int only. It would be incorrect, if we assign an address of a float variable to a pointer of type pointer to int. But void pointer is an exception to this rule.

What is the proper type of pointer for a one_D?

Since the base type of one_d is a pointer to int or (int*), the void pointer vp is acting like a pointer to int or (int*). So the proper typecast is (int*). The following program demonstrates pointer arithmetic in void pointers.

What are the limitations of a void pointer?

It has some limitations − 1) Pointer arithmetic is not possible with void pointer due to its concrete size. 2) It can’t be used as dereferenced. Begin Declare a of the integer datatype. Initialize a = 7. Declare b of the float datatype. Initialize b = 7.6. Declare a pointer p as void.