Question

This is probably simple, but im trying to try and understand pointers better.
Lets say I have a struct

struct Person{
  char Name[20];
  char ID[15];
  char Address[50];
  char Number[15];
};

and lets say I have a bunch of these stored in memory like one after the other.
so now i declare a new pointer to the struct.

struct Person *ptr;

Will this Pointer start at the FIRST entry? (aka the first “Name”) and when I iterate it (aka ptr++) will it go to the next STRUCT or the next “entry” aka like name–>ID—>Address

So lets say Im on the first entry for example and the data is:

Jason Adams
111222333
111 Fake Drive
55555551000

and the second entry is

Matt Johns
111555333
555 Derp lane
1000022434

now I iterate the ptr (ptr++) will the ptr point to second struct (the one with matt johns) or will it point to Jason Adams “ID”

I hope this makes sense?

Answer 1

It will point to the second struct. The pointer will be advanced by sizeof(Person).