/*
 * Program to experiment with pointer variables and arithmetic
 */
#include <iostream>
#include <stdio.h>

int main()
{
  int i, *ip, **ipp;
  char c, *cp, **cpp;
  double d, *dp;

  // Initialize some variables
  i = 268;
  c = 'a';
  ip = NULL;

  // What values reside in the uninitialized variable?
  printf("Variable values: c=%c, i=%d, ip=%x, cp=%x, ipp=%x, cpp=%x\n",
	 c, i, ip, cp, ipp, cpp);

  // pointer assignments
  ip = &i;
  //cp = &i; // Is this allowed?
  cp = &c;
  //ipp = &i; // Is this allowed?
  ipp = &ip;
  cpp = &cp;
  dp = &d;

  printf("Pointer values after assignment: ip=%x, *ip=%d, &ip= %x, *ipp=%x, **ipp=%d\n",
	 ip, *ip, &ip, *ipp, **ipp);

  // Operations on pointer variables
  printf("Values in pointer variables: cp=%u, ip=%u, cpp=%u, ipp=%u, dp=%u\n",
	 cp, ip, cpp, ipp, dp);
  cp++;
  ip++;
  cpp++;
  ipp++;
  dp++;
  printf("Values after increment     : cp=%u, ip=%u, cpp=%u, ipp=%u, dp=%u\n",
	 cp, ip, cpp, ipp, dp);

  return 0;
}