What is this pointer ? How we can use ?

Question

cpp

Answer 1

pointer is a variable which stores the address of another variable...

Answer 2

A pointer is an object, whose value refers to (or "points to") another value stored elsewhere in the computer memory using its memory address.

Objective C Exemple:
int x = 45;
int *y = &x;
NSLog(@"The value was %d", *y);

The statement on the last line will print out the message "The value was 45" 

Answer 3

i am asking 'this pointer'