/******
 * pointers.c
 ****/
#include <stdio.h>

void printlist(int* intptr, int n){
  // print n numbers from a list.
  int i;
  printf("[");
  for (i=0; i<n; i++) printf("%i, ", intptr[i]);
  printf("]\n");
}

int main(){
  int thelist[6] = {10, 20, 30, 40, 50, 60};
  int a = 1234;
  int* numptrA;
  int* numptrB;
  int b = 5467;
  
  numptrA = &thelist[1];
  numptrB = thelist; // same as &thelist[0]

  printf("4 numbers from thelist: ");
  printlist(thelist, 4);

  printf("3 numbers from numptrA = : ");
  printlist(numptrA, 3);

  printf("3 numbers from numptrB = : ");
  printlist(numptrB, 3);
  
  //thelist = {1,2,3,4,5}; // ERROR - this syntax only works for initialization.

  printf("\n");
  
  printf("addresses : \n");
  printf(" &thelist = %p \n", &thelist);
  printf(" &a = %p \n", &a);
  printf(" &numptrA = %p \n", &numptrA);
  printf(" &numptrB = %p \n", &numptrB);
  printf(" &b = %p \n", &b);

  printf("\n");

  printf("values : \n");
  printf(" thelist = %p \n", thelist);
  printf(" a = %p \n", a);  
  printf(" numptrA = %p \n", numptrA);
  printf(" numptrB = %p \n", numptrB);
  printf(" b = %p \n", b);  

  return 0;
}