c pointers explained.

c-pointer-fun.c

#include <stdio.h>

int main() {
  int* p;
  // Address pointer is pointing to
  printf("Address pointer p is pointing to: %p\n", p);
  // Address of pointer itself
  printf("Address of pointer p itself: %p\n", &p);

  int x = 3;
  printf("Initialized int x: %d\n", x);
  p = &x;
  printf("Initialized pointer p with x: %d\n", *p);


  // Address pointer is pointing to
  printf("Address of int x: %p\n", &x);
  printf("Address pointer p is pointing to: %p\n", p);
  // Address of pointer
  printf("Address of pointer p itself: %p\n", &p);
  // Value of adress pointer is pointing to
  printf("Value of int x: %d\n", x);
  printf("Value of adress pointer is pointing to: %d\n", *p);
  // Change value of x
  *p = 1;
  printf("Value of int x now: %d and value pointer is pointing to also: %d", x, *p);
}