size of pointers and architecture

Question

By conducting a basic test by running a simple C++ program on a normal desktop PC it seems plausible to suppose that sizes of pointers of any type (including pointers to fun

Answer 1

Target architecture "bits" says about registers size. Ex. Intel 8051 is 8-bit and operates on 8-bit registers, but (external)RAM and (external)ROM is accessed with 16-bit values.