What is the use of double pointer in C?

The first pointer is used to store the address of the variable. And the second pointer is used to store the address of the first pointer. That is why they are also known as double pointers.

What is a triple pointer give example?

Up vote -3. Triple pointer is a pointer variable that points to a pointer which in turn points to another pointer. The use of this complex programming technique is that usually in which companies process tons and tons of data at one time .

What is Pointers What is the use of having double triple and quadruple pointers?

Double and triple pointers are often used for 2 reasons – passing a pointer to a function and dynamic allocation of memory for 2D and 3D arrays. The use of pointers for dynamic memory allocation is described in C++ Dynamic Memory.

What is the advantage of double pointer?

Every argument to a function in C is passed by value, which means that if you change the pointer inside the function, it won’t be changed outside. To guarantee it is also changed outside, you can use a reference to the pointer: double pointers.

Why do we need double pointer?

Double pointers can also be used when we want to alter or change the value of the pointer. In general double pointers are used if we want to store or reserve the memory allocation or assignment even outside of a function call we can do it using double pointer by just passing these functions with ** arg.

Is there a triple pointer in C?

The fact that they’re implemented here as triple pointers is irrelevant to the user. Complicated data structures should be encapsulated. This is one of manifest ideas of Object Oriented Programming. Even in C, you can apply this principle to some extent.

What is double pointer in linked list?

Double pointer may be used in linked list to pass as an argument whenever we need to make a change to the actual linked list passed through a function whose return type is void. Thus, such functions are used only to manipulate the linked list by passing the reference of its head. This is just same as pass by reference.

What is triple pointer?

A triple-pointer is a pointer that points to a memory location where a double-pointer is being stored. The triple-pointer itself is just one pointer. Ex. int *** is a pointer, that points to the value of a double pointer, which in turn points to the value of a single pointer, which points to the value of an int.

What are the uses of pointers?

Pointers are used to store and manage the addresses of dynamically allocated blocks of memory. Such blocks are used to store data objects or arrays of objects. Most structured and object-oriented languages provide an area of memory, called the heap or free store, from which objects are dynamically allocated.

What is the difference between a single pointer and triple pointer?

A double pointer can hold the address of a single pointer, and a triple pointer can hold the address of a double pointer. In your code, the first pointer ‘c’ is a double pointer which holds cstrings in itself. cstrings are single char pointers. then ‘cp’ and ‘cpp’ both are triple pointers.

Therefore, double pointers are used when we want to store the address of the pointers. Usually, pointers are used to access the address of the variables that we want to get the value or access it. How does Double Pointer work in C?

When to use a double pointer to pass an array?

The double pointer can be a 2D array (or array of arrays, since each “column” or “row” need not be the same length). I personally like to use it when I need to pass a 1D array: void foo (char **c); //means I’m going to modify the elements of an array in foo.

Is it possible to use triple pointers to INTs on matrices?

Is the argument a three-dimensional jagged array, or pointer to two-dimensional jagged array, or pointer to pointer to array (as in, function allocates an array and assigns a pointer to int within a function) Surely you can use triple pointers to int to operate on matrices. But that’s not what they are.