What are the specific uses of pointer to pointer?

No. Each laser pointer uses a laser that emits a specific color. the only way to get a different color would be to get a different laser.

Void pointer can hold the address of any kind of pointer. But we can't operate on void pointer

A pointer to pointer has many uses, one of the simplest being 2D arrays (matrices). Compacting garbage collectors also often employ pointer pointers.

Accessing data by address.

As the name suggests Pointer is used to point towards something ,here in this case it points to another variable and stored at a memory location. Pointer is a variable that stores address of another variable. Different Types of pointers are: 1)Dangling Pointers 2)NULL Pointers 3)This Pointer 4)Generic Pointer 5)Near Pointer 6)Far Pointer

The void type has only one purpose: to specify the return type of a function that has no return value. In this case void simply means no type. The only other usage is when used as a pointer to void (void*), which simply means a pointer type that can refer to any type of object. If the pointer is non-null, it must be cast to a specific type before it can be dereferenced.

Clarification is needed. The pointer used isn't specific to the Bar Mitzvah ceremony, it is the pointer used whenever the Torah scroll is read. The pointer itself is called a 'yad' which means 'hand'.

it uses pointer to stucture.

The pointer a person uses in a synagogue is called a Yad. They use it to read from the Torah. It is also used during Bar Mitzvahs.

Answer I take it you are using some version of c,c++,visualC etc etc. One thing that is standard is pointers. A pointer is the address of a memory space that holds information in that specific space. By referencing the pointer in your code, you can print out that specific bit of information that the poiner is actually pointing to. Hope this helps

A NULL pointer is a pointer variable that stores the value zero. Although there is a memory address at offset 0, this value is reserved to indicate that the pointer is not pointing at any valid memory. A void pointer is a pointer variable that has no specific type. For instance, int * p; tells the compiler that p will point to a memory location that will be treated as if it were an int…

In computer terminology, pointer is a programming language. It is an important part of C language. Uses of pointers: C pointer, C arrays, C linked list, memory-mapped hardware, Pass-by-address using pointers, Dynamic memory allocation.

A file pointer is an opaque object that refers to a file. Opaque means that you should not attempt to delve into its specific value, other than to use it as a file pointer. FILE *fp; /* fp is the file pointer */ fp = fopen("somefile.txt"); if (fp == NULL) ...{exception}... fprintf(fp, "Hello somefile.txt"); fclose(fp);

are usable. void pointer (generic pointer) : a special type of pointer which point to some data of no specific types. void *p; null pointer : a special type of pointer which point nowhere. it is usually used to check if a pointer is pointing to a null or free the pointer during deallocation of memory in dynamic memory allocation; it is define by using the predefine constant NULL int *p=NULL; wild pointer…

C uses pointers for indirection. So, using a pointer to a pointer would be multiple indirection. For example, the following code uses multiple indirection: int i = 42; int *pi = &i; int **ppi = π **ppi++; printf("i is now %d\n", i);

A pointer's type does not affect how an address is represented, it affects how the object at that address is to be interpreted. As such, function pointers are represented no differently to any other type of pointer. If the system uses 32-bit addressing than a pointer is 32-bit variable regardless of the type it refers to.

There is no specific key. Put your mouse pointer on the sentence and triple-click.

Since it is forbidden to touch the Torah scroll due to its sanctity, the reader either uses his finger to point at the text without actually touching it or uses a pointer traditionally made from silver but can be made from any metal, glass or wood. Tjis pointer is called a yad, which means hand in Hebrew. The pointer should not touch the text since it can damage the ink.

It is massless and it is not affected by gravity.

Your question makes no sense.

A pointer variable which is declared but not initialized is called a NULL POINTER. ex: int *p; Please don't use the above. A NULL pointer is a specific value assigned to a pointer, just like any other value. NULL is a language-specific designation, and is guaranteed to be comparable to, unlike uninitialized variables, which can have any value. That is: int *a; int *b = NULL; int *c = (int *) malloc(sizeof(char)); ( a c)…

Measurements of specific densities.

int main (int argc, char **argv) { printf ("argv pointer is %p, argv[0] pointer is %p\n", argv, argv[0]); return 0; }

It is a matter of the memory model you are using. On old or embedded systems, some memory was outside of the range of a normal pointer. If you have 4 megs of ram you need at least a 22bit pointer to see all of it. But let's say you only have a 16 bit pointer. This means you can only access the first 65K of ram. Odd as it may sound, this was a…

The double star (**) notation is not specific to initializing a variable in a class. It is simply a double indirect reference to an object. float myFloat; // an object float *myFloatPtr; // a pointer to an object float **myFloatPtrPtr; // a pointer to a pointer to an object myFloat = 123.456; // initialize an object myFloatPtr = &myFloat; // initialize a pointer to an object myFloatPtrPtr = myFloatPtr; // initialize a pointer to a…

As the standard iPad uses a touch sensitive screen as a control surface and does not have on screen pointer there is no point in connecting peripherals to control a pointer, although in theory such Bluetooth devices can be paired with the iPad.

A barograph is a device used to monitor pressure. It is a recording aneroid barometer and uses a pen instead of a pointer to record the data.

WIMP Windows Icons Menus Pointer

Pointer is simply a variable that stores the memory address of another variable. Pointer to pointer means double pointer ,pointer that points to another pointer variable.

The automatic uses ATF+4 The manual uses a specific manual transmission fluid.

Pointers are used to store memory addresses and to allow indirect access to the values stored at those memory addresses. C uses pass by value semantics by default, but by passing pointers you gain pass by reference semantics. The pointer itself is passed by value and is therefore copied, but the copy refers to the same address as the original pointer.

An infrared pointer uses light that is mainly in the infrared spectrum, and so is mostly invisible to humans. A laser pointer in general refers to any device using a beam of light to mark an object. Both use the same basic technology. The only difference is the wave length. IR lasers are outside of the visual spectrum where as standard laser pointers are within the visual spectrum.

Pointer is a variable that is used to store the memory address of another variable. There are differenr types of pointers: NULL pointer THIS pointer VOID pointer NEAR pointer HUGE pointer FAR pointer WILD pointer

Double pointers are better known as pointer-to-pointer types. You use pointers to store the memory address of an object but when the object is itself a pointer, you need to use a pointer-to-pointer in instead. Pointer-to-pointer types are typically used when passing pointers into functions. Pointers allow you to pass objects to functions by reference but the pointer itself is passed by value. If you want to pass the pointer by reference, you need to…

A pointer points to another pointer in the same way that a pointer points to a non-pointer object. Start with a pointer to an object... int a; // the object int *pa = &a; // the pointer pa; // is the value of the pointer *pa; // is the value of the object Now, create a pointer to a pointer to an object int a; // the object int *pa = &a; // the first…

1. pointer to a constant means you can not change what the pointer points to 2. constant pointer means you can not change the pointer.

Pointer to Pointer is a double pointer, denoted by (**). Pointer stores the address of the variable and pointer to pointer stores the address of a pointer variable and syntax can be given as int **ptr2ptr;

Example: int x; -- integer int *px= &x; -- pointer to integer int **ppx= &px; -- pointer to pointer to integer int ***pppx= &ppx; -- pointer to pointer to pointer to integer

dangling pointer is a pointer

A pointer only holds an address information (location) in the memory. if a pointer holds points another pointer then it is a pointer to an other pointer. Pointer holds an address in the memory so in that address there is an other location information that shows another location.

thread control block contain thread specific information such as -Stack pointer, PC, thread state (running, …), register values, a pointer to PCB, … The Thread Control Block acts as a library of information about the Thraeds in a system. Specific information is stored in the Thread control block highlighting important information about each process. By: ASIM JAVAID IQBAL

To separate mixtures.

quantitative data is the data that uses numbers and or amounts.

A Pointer is a Variable that holds a memory address, usually the location of another variable in memory. A pointer to pointer is known as double pointer.

Double (**) is used to denote the double pointer. As we know the pointer stores the address of variable, Double pointer stores the address of any pointer variable. Declaration : int **ptr2Ptr;

Try this: printf ("In this platform an integer pointer uses %d bytes\n", (int) sizeof (int *));

The this pointer can only be used within nonstatic member functions. Friend functions are not members so they have no access to a this pointer. However, you can pass a specific instance of a class to a function via a class reference argument. To understand how friendship works, first understand that a nonstatic member function has the following properties: 1. It has private access to the class. 2. It is scoped to the class. 3…

Double pointer is a pointer to a pointer. So you can work with the double pointer as you work with a single one. Or you might mean 'pointer to double', eg: void clear_double (double *dp) { *dp = 0; }

pointer is the variable that holds the address of another variable

Studying of astronomic objects.