0
It is variable. On most PCs it is either 32 or 64 bits. But it can be smaller on other systems. To find the size use sizeof(void*) .
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What is generic pointer in C?
When a variable is declared as being a pointer to type void it is known as a generic pointer. Since you cannot have a variable of type void, the pointer will not point to any data and therefore cannot be dereferenced. It is still a pointer though, to use it you just have to cast it to another kind of pointer first. Hence the term Generic pointer.
What is a kind of expression that has no variable?
A constant expression.
What is reference variable in java?
A reference is a memory address. In some languages, like C, memory addresses can be stored in pointer variables. Thus a pointer is a reference variable. They are said to point to the memory address, and allow indirect access to that memory address. Since they are variable, they can be re-assigned (unless declared constant, in which case they are not variable). However, in other languages, like C++, a reference is neither a pointer nor a variable -- it is an alias, an alternate name for an already existing object. References have no storage of their own thus they cannot be reassigned once initialised. In that respect they are like constant pointers. However, since they have storage of their own, there is no need to use indeirection. It's a bit like referrring to someone named William as Bill, Billy or Will -- they're all alternate names (aliases) for the same person.
What Pointer in Data Structure?
No, pointer is not a data type but a reference to an object. Pointers are used to refer back to an object which can be anything from a large data value or a collection of values or objects.A pointer is a variable and is 4 bytes long because 4 bytes = 32 bits, and all addresses in 32 bit operating systems are 4 bytes long :) , so if you want to store an address somewhere you need 4 bytes. A pointer is just 4 bytes in the memory and in these 4 bytes an address is stored. If you ask the address of an element, like char, int, etc., the address you will get will be the address of the first byte. Only the first byte is saved in the pointer, and then you can manipulate the upcoming bytes.For example you declare a structure of 12 bytes and you name it myStruct.let's say that the address of this structure is the address 0x00400001
What is dereferencing pointer?
They're related but not totally comparable.A pointer is an address in memory where a variable is located.An array is a conceptual data representation consisting of a list of more than one item of a particular scalar type (int, float, char, structure, etc.) where each element is accessed by its index. The index can be thought of as a counter or enumerator telling you how many elements you have to skip over to get to the one you're interested in. Here's where addresses come in ... the location of a particular element in memory is offset from the so-called base address (i.e. the address of the starting element) by the value(sizeof(one element) * index #)The C compiler is smart enough to take the sizeof() into account when you do pointer arithmetic, so you can find the address of the i-th element as (address of base) + i, rather than having to do the multiplication explicitly.The idea of element address as offset also accounts for C's use of zero-relative array definitions. Since the first element is offset by 0 positions from the first element its index in C is 0, not 1. The second (ordinal) element is offset from the first by 1 position so its index is 1, and so on.
What is generic pointer in C?
When a variable is declared as being a pointer to type void it is known as a generic pointer. Since you cannot have a variable of type void, the pointer will not point to any data and therefore cannot be dereferenced. It is still a pointer though, to use it you just have to cast it to another kind of pointer first. Hence the term Generic pointer.
What is pointers in c?
a pointer is a variable .it specify the address of the particular variable ,the & symbol is to specify the address of the variable.
What is void pointer and what are its uses?
Void pointer can hold the address of any kind of pointer. But we can't operate on void pointer
What kind of variable is sport in statistics?
It is a qualitative variable.
What are the two kind of variable?
what are the two kinds of variable
What an idependent variable?
It is the kind of variable that you purposely change.
What is an idependent variable?
It is the kind of variable that you purposely change.
Production cost is which kind of cost variable or fixed cost?
variable
What kind of control does not contain the variable?
the variable that is most difficult to test
What kind of laser pointer does the Optoma EP1691 WXGA DLP Projector have?
The Optoma EP1691 WXGA DLP Projector has an integrated laser pointer.
What is a pointer on a computer?
It is kind of like a cursor but it only appears on icons.
What kind of variable do you change?
independent
