returning a pointer

I have been asked to write a function called merge that accepts
two pointers and returns a pointer.
So to define this I would write:
??? merge(LISTINTPTR *, LISTINTPTR *);

instead of the ??? what is the return type for a pointer?
like the two pointers that are being passed into the function, the pointer points to the first node of a linked list.

i would geuss LISTINTPTR* merge(LISTINTPTR* p1,LISTINTPTR* p2)

I'm pretty sure that that would give me an error/warning indicating a non recognisable return type.
What I'm asking is a general type like int or char, that is a return type used for pointers.

well if its an unrecognised return type then it is also an unrecognised parameter type!

pointers have no intrinsic type. You have to tell the compiler what type the pointer is to point to. An instance of a struct or class or a typedef are as valid a type as are the primitive types such int, char, etc.

In C lists are not much more than a pointer to a struct that contains (a) data member(s) and a pointer to the type. In C++ lists are frequently elevated to types in and of themselves containing not only the data member(s) and pointer(s) but the functions necesarray to manipulate information contained in the list.