ex15.6.c

#include <stdio.h>

int main(int argc,char*argv[])
{
  // create two arrays we care about
  int ages[]={23,43,12,89,2};
  char *names[]={"Alan","Frank","Marry","John","Lisa"};

  // safely get the size of ages
  int count=sizeof(ages)/sizeof(int);
  int i=0;

  // first way using indexing
  for(i=0;i<count;i++)
  {
    printf("%s has %d years alive.\n", names[i],ages[i]);
  }

  printf("---\n");

  // setup the pointers to the start of the arrays
  int *cur_age=ages;
  char **cur_name=names;

  // second way using pointers
  for(i=count-1;i>=0;i--)
  {
    printf("%s is %d years old.\n",*(cur_name+i),*(cur_age+i));
  }

  printf("---\n");

  // third way, pointers are just arrays
  for(i=0;i<count;i++)
  {
    printf("%s is %d years old again.\n",cur_name[i],cur_age[i]);
  }

  printf("---\n");

  // fourth way with pointers in a stupid complex way
  for(cur_name=names,cur_age=ages;(cur_age-ages)<count;cur_name++,cur_age++)
  {
    printf("%s is %d years so far.\n",*cur_name,*cur_age);
  }

  for(i=0;i<count;i++)
  {
    printf("%p,%p\n",&cur_age[i],&cur_name[i]);
  }

  return 0;
}