The document defines and demonstrates how pointers in C++ work. It declares an integer variable myInt and a pointer variable myPointer. It then makes myPointer point to myInt by using the address-of operator & on myInt. This allows myPointer to access the memory location and value of myInt. Another pointer variable anotherPointer is then defined and made to point to the same location as myPointer, demonstrating that multiple pointers can reference the same memory address.

1. int *myPointer;

2. int *myPointer;
Declare a variable
called myPointer

3. int *myPointer;
The * means it
will be a pointer to
something

4. int *myPointer;
This pointer will
point to data of
type int

5. int *myPointer;
int myInt = 5;
myPointer = &myInt;

6. int *myPointer;
int myInt = 5;
myPointer = &myInt;
This regular int
variable is located at
a particular location
in memory

7. int *myPointer;
int myInt = 5;
myPointer = &myInt;
The & grabs the
location of the
integer to store in
the pointer

8. int *myPointer;
int myInt = 5;
myPointer = &myInt;
Now myPointer
is storing the
location of myInt

9. int *myPointer;
int myInt = 5;
myPointer = &myInt;
cout << *myPointer << endl;
cout << myInt << endl;

10. int *myPointer;
int myInt = 5;
myPointer = &myInt;
cout << *myPointer << endl;
cout << myInt << endl;After a pointer has
been declared, * lets
you access its contents
(if there are any!)

11. int *myPointer;
int myInt = 5;
myPointer = &myInt;
cout << *myPointer << endl;
cout << myInt << endl;
myPointer is
pointing to myInt, so
this will print the same
thing as *myPointer

12. int *myPointer;
int myInt = 5;
myPointer = &myInt;
int *anotherPointer
= myPointer;

13. int *myPointer;
int myInt = 5;
myPointer = &myInt;
int *anotherPointer
= myPointer;
Another variable
that will store the
memory location of
an int

14. int *myPointer;
int myInt = 5;
myPointer = &myInt;
int *anotherPointer
= myPointer;
Now anotherPointer and
myPointer both point to myInt’s
memory location

15. int *myPointer;
int myInt = 5;
myPointer = &myInt;
int *anotherPointer
= myPointer;
Same result:
anotherPointer = &myInt;