Pointers to pointers
In C++, we can create a pointer to a pointer that in turn may point to data or another pointer. The syntax simply requires the unary operator (*) for each level of indirection while declaring the pointer.
char a;
char *b;
char ** c;
a = ’g’;
b = &a;
c = &b;
Here b points to a char that stores ‘g’ and c points to the pointer b.
C++ Pointers
Pointers are symbolic representations of addresses. They enable programs to simulate call-by-reference as well as to create and manipulate dynamic data structures. Iterating over elements in arrays or other data structures is one of the main use of pointers.
The address of the variable you’re working with is assigned to the pointer variable that points to the same data type (such as an int or string).
Syntax:
datatype *var_name;
int *ptr; // ptr can point to an address which holds int data