What are the advantages of a pointer variable?

Answer 1

Arrays takes consecutive memory space.

So, if you have 5 consecutive memory blocks free which is consecutive, an error will

occur while creating an array which takes more than 5 blocks of memory.

But if you use pointer, then it don't need consecutive memory blocks all the elements can be placed anywhere in memory.

Answer 2

.pointers are generally useful in the context where we need a continuous memory allocation. Using pointers dynamic allocation of memory is achieved pointers basically hold the address of a variable. they are mainly used as function parameters to pass values of parameters as references rather than values

Answer 3

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.

Answer 4

• this pointer stores the address of the class instance, to enable pointer access of the members to the member functions of the class.
• this pointer is not counted for calculating the size of the object.
• this pointers are not accessible for static member functions.
• this pointers are not modifiable.

Answer 5

Pointers are used for accessing the addresses of varibles and functions which are usedin our program directly.
i have seen the answer from other site and improved
the advantages of pointers as I see it.
- Pointers allow you to implement sharing without copying i.e. pass by reference v/s pass by copying. This allows a tremendous advantage when you are passing around big arrays as arguments to functions.
- Pointers allow modifications by a function that is not the creator of the memory i.e. function A can allocate the memory and function C can modify it, without using globals, which is a no-no for safe programming.
- Pointers allow us to use dynamic memory allocation.
- Pointers obviously give us the ability to implement complex data structures like linked lists, trees, etc
- Pointers allow ease of programming, especially when dealing with strings. This is due to the fact that a pointer increment will move by the size of the pointee i.e. easy coding to increment to the next memory location of an array, without worrying about how many bytes to move for each data type. I.e. a pointer to a char will move the pointer by a byte, pointer to an int, by the size of the int, etc NOTE that this is important because you do not have to worry about the size of the data types which can vary on different architectures.
- Pointers allow us to resize the data structure whenever needed. For example, if you have an array of size 10, it cannot be resized. But, an array created out of malloc and assigned to a pointer can be resized easily by creating a new memory area through malloc and copying the old contents over. This ability is very important in implementing sparse data structures also.

Answer 6

If you don't know, then don't use them. Maybe later.