Why the size of pointer is 4 bytes?

Pointers are basically memory addresses, so pointer size is determined by the maximum amount of memory you can address rather than the size of the data you are addressing. On a 32-bit architecture, pointers are 32 bits long (4 bytes) regardless of what the pointer is pointing at.

In respect to this, how many bytes is a pointer?

4 bytes

Additionally, why size of pointer is 8 bytes? So size of pointer is not same in all machines. The reason the size of your pointer is 4 bytes is because you are compiling for a 32-bit architecture. As FryGuy pointed out, on a 64-bit architecture you would see 8. You can see that in 64-bit, sizeof(pointer) is 8 .

In respect to this, what is the size of a pointer?

4 bytes

Do all pointers have same size?

All pointers are the size of a memory address. The pointer contains as its data the address of a one memory cell that is the first or the last byte of a piece of data in memory. But these days mostly all pointers are the same size. This picture would be for a 32-bit machine with 32 bit addresses.

Related Question Answers

Are pointers 8 bytes?

Pointers are blocks of memory (8 bytes on 64-bit machines) that reference memory addresses of any data type in C.

Does pointer Take memory?

Pointer itself takes up space in the memory and can be pointed only to the data type you specify while creating that pointer. So yes even if you have nothing assigned to it, pointer will take memory space. Exactly how much memory space depends on machine that it is created.

What is the size of generic pointer in C?

What is size of generic pointer in C++ (in 32-bit platform)? Explanation: Size of any type of pointer is 4 bytes in 32-bit platforms.

What is sizeof in C?

CProgrammingServer Side Programming. The sizeof operator is the most common operator in C. It is a compile-time unary operator and used to compute the size of its operand. It returns the size of a variable. It can be applied to any data type, float type, pointer type variables.

What is size of pointer variable in C?

The Pointer in C language is a variable which stores the address of another variable. This variable can be of type int,char, array,function or any other pointer. The size of the pointer depends in the architecture. However,in 32-bit architecture the size of a pointer is 2 byte.

How many bytes is a char pointer in C?

1 byte

What will be the output of the program if the size of pointer is 4 bytes?

What will be the output of the program if the size of pointer is 4-bytes? Explanation: In TurboC, the output will be 2, 1 because the size of the pointer is 2 bytes in 16-bit platform. But in Linux, the output will be 4, 1 because the size of the pointer is 4 bytes.

What is pointer arithmetic in C?

Address arithmetic is also called pointer arithmetic. According to C and C++ language standards, the result address must remain strictly within the bounds of a single array object (or just after it). Adding or subtracting from a pointer moves it by a multiple of the size of the data type it points to.

What is the size of void?

If the system is 16-bit, size of void pointer is 2 bytes. If the system is 32-bit, size of void pointer is 4 bytes. If the system is 64-bit, size of void pointer is 8 bytes.

What is the size of character pointer?

8 bytes

Can a structure contain pointer to itself?

If a structure contains one or more pointers to itself (a structure of same type) as its members, then the structure is said to be a self-referential structure, that is, a structure that contains a reference to its own structure type. int data; struct node *next; };

What is the size of integer pointer?

8 bytes

What is generic pointer?

A generic pointer is a pointer variable that has void as its data type. The void pointer, or the generic pointer, is a special type of pointer that can point to variables of any data type. It is declared like a normal pointer variable but using the void keyword as the pointer's data type.

What is a void pointer?

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. 2) void pointers in C are used to implement generic functions in C. For example compare function which is used in qsort().

Do pointers bark?

Pointers do not do a lot of barking. They have a relatively low tendency to bark when they are trained and well exercised. However, they will bark if they are bored for too long or to alert owners of danger/strangers.

What can't you do on a void pointer?

Explanation: Because it doesn't know the type of object it is pointing to, So it can point to all objects. 2. When does the void pointer can be dereferenced? Explanation: By casting the pointer to another data type, it can be dereferenced from the void pointer.

How big is long?

long. The size of the long type is 8 bytes (64 bits).

What is the size of a void pointer?

The size of void pointer varies system to system. If the system is 16-bit, size of void pointer is 2 bytes. If the system is 32-bit, size of void pointer is 4 bytes. If the system is 64-bit, size of void pointer is 8 bytes.

Why size of pointer is 2 byte?

First of all it is not required for pointer to be of 2 bytes in size , it machine dependent. Since it is address of a memory segment , hence it is consistent for every type of variable like int , char , float or user defined data type.

Can a pointer point to itself?

Yes, a pointer can contain the position of a pointer to itself; even a long can contain the position of a pointer to itself.

Is pointer a data type?

Pointer is a user defined data type which creates special types of variables which can hold the address of primitive data type like char, int, float, double or user defined data type like function, pointer, etc. or derived data type like an array, structure, union, enum.

What is the size of double pointer?

The size of a float pointer is 8 bytes! The size of a double pointer is 8 bytes! The size of a void pointer is 8 bytes!

Why do Pointers need types?

The type of a pointer in C tells the compiler what is the size of the memory block to be read in case you attempt to dereference it. In other words, when dereferencing an int pointer the compiler knows that 4 bytes have to be read after the address.

How many bytes is a pointer C++?

four bytes

Do pointers need to be initialized?

Just like normal variables, pointers are not initialized when they are instantiated. Unless a value is assigned, a pointer will point to some garbage address by default. Besides memory addresses, there is one additional value that a pointer can hold: a null value.

Do pointers take up memory?

Now, reintroducing pointers - a pointer is a block of memory that refers to another memory address. On 64-bit machines, pointers take up 8 bytes of memory (on 32-bit machines, they take up 4 bytes). This can be proven using the C standard library sizeof operator.