Pointer reference and derefrence

Question

Confuse about pointer reference & derefrence, its value assignment, its calling and pointing then. *ptr = new int ;
*ptr=5;

Confuse about this!!!
Kindly summaries this concept.

Answer 1

~ swim ~ thanks, I fixed it.

Answer 2

pointer reference points to a memory address.
dereference returns the value at that memory address.
ex:

int * ptr;
int x;

ptr = &x ; // pointing to the memory address of x.
*ptr = 5; //it assigns 5 to x
now if you want to print the value of x, you could just print x directly or you could dereference the pointer and the results would be the same.
if you don't dereference the pointer it would print the memory address.
cout << x ; // prints 5
cout << *ptr ; //prints 5
cout << ptr ; // prints memory address of x
you dereference a pointer with *