Pointer *a=b or a*=b* ?

[fukki]

Hello, i study about stacks, and i want to know if
Node *old top = top node; is the same as Node *old top = *top node;

if not whats the difference. My code is

Error code Stack :: pop( )
/* Post: The top of the Stack is removed. If the Stack is empty the method returns
underow; otherwise it returns success. */
{
{
Node *old top = top node;
if (top node == NULL) return underow;
top node = old top->next;
delete old top;
return success;
}

For those that may didn`t understand i give another example
Can i say

Node *old top;
*old top = top node;

or

Node *old top
*old top = *top node;

[hamsterman]

A class/variable name cannot have two words..

The thing you need here is old_top = top_node, but I'll explain all cases:

Type object1 = object2;//copy of an object
object1 = object2;//same without declaration

Type* pointer = &object;//address of object is assigned to pointer
pointer = &object;//same without declaration

Type* pointer1 = pointer2;//copy of an address
pointer1 = pointer2;//same without declaration

Type object = *pointer;//the value to which pointer points, is copied to object
object = *pointer;//same without declaration

*pointer = object;//the value to which pointer points becomes a copy of object. address doesn't change

*pointer1 = *pointer2;//the value to which pointer1 points becomes a copy of
                      //the value to which pointer2 points. addresses don't change 

[fukki]

That was very helpfull hamsterman, thanks!