Pointers:-
Pointers are a type of variable that allow you to specify
the address of a variable.
They provide a convenient means of passing arguments
to functions and for referring to more complex data types such as structures. You need to declare and initialize
pointers just as you would other variables, but there are special
operators that you need to use.
Address Operator (&):
The
"address of " operator (&) gives the memory address of the variable.
Declaration and Initialization of Pointer variables:
type* pointer_name;
//or
type *pointer_name;
type*pointer_name=&variable_name;
The * Operator Dereference:
The star operator (*) dereferences a pointer. The * is a unary operator which goes to the left of the pointer it dereferences. The pointer must have a pointee, or it's a runtime error.
Pointer to Pointer:
Types of Pointers
i) Null Pointer
A pointer should be set to zero when it is not assigned to a valid address. Such a pointer is called a null pointer. Doing this will allow you to check whether the pointer can be safely dereferenced, because a valid pointer will never be zero.
i) Void Pointer
