Chain of Pointers

Chain of pointers:

It is possible to make a pointer to point to another pointer, thus creating a chain of pointers.

 

Here, the pointer variable p2 contains the add of the pointer variable P₁, which points to the location that contains the desired value. This is known as multiple indirection's.

A variable that is a pointer to a pointer must be declared using additional indirection operator symbols in front of the name.

Ex:–  int **p2;

This declaration tells the compiler that p2 is a pointer to a pointer of int type.

Ex:–

#include

main()

{

Int x, *p1, **p2;

x=100;

p1=&x;

p2=&p1;

printf(“%d”, **p2);

}

This code will display the value 100. Here, P1 is declared as a pointer to an integer & p2 as a declared as a pointer to an integer & p2 as a pointer to a pointer to an integer.