What are some examples of pointer to pointer in C++?

Can you explain what a pointer to a pointer is in C++?

Sure! A pointer to a pointer is a variable that stores the address of another pointer. It allows for multiple levels of indirection.

Can you give me an example of how to use a pointer to a pointer?

Absolutely! Here's a simple example:

int var = 5;
int *ptr = &var;  // pointer to var
int **ptr2 = &ptr; // pointer to pointer

What is the output if I print the value of **ptr2?

If you print **ptr2, it will output 5, which is the value of var.

Are there any common use cases for pointer to pointer?

Yes, they are often used in dynamic memory allocation, multi-dimensional arrays, and when passing pointers to functions.