Can you add pointers together? Why would you?
No, you can't add pointers together. If you live at 1332 Lakeview Drive, and your neighbor lives at 1364 Lakeview, what's 1332+1364? It's a number, but it doesn't mean anything. If you try to perform this type of calculation with pointers in a C program, your compiler will complain.
The only time the addition of pointers might come up is if you try to add a pointer and the difference of two pointers:
p = p + p2 - p1;
which is the same thing as this:
p = (p + p2) - p1.
Here's a correct way of saying this:
p = p + ( p2 - p1 );
Or even better in this case would be this example:
p += p2 - p1;