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In computer programming, a pointer is a variable that stores the address of another variable. This means that a pointer can point to another pointer, which can point to another pointer, and so on. This is called multiple levels of indirection.
For example, let's say we have a variable called x that stores the address of a variable called y. We can then create a pointer called p that stores the address of x. This means that p points to x, which in turn points to y.
C
int x = 10; int *y = &x; int **p = &y;
In this example, p is a pointer to a pointer to an integer. This means that p can be used to indirectly access the value ofx.
Multiple levels of indirection can be used to achieve a variety of programming tasks. For example, they can be used to implement linked lists, trees, and other data structures.Here is a c++ resource that you may find helpful.
