#include "library.h"

const string animals[] =
 {    "aardvark",     "albatross",     "alligator",        "amoeba",
           "ant",      "anteater",      "antelope",     "armadillo",
        "baboon",           "bat",          "bear",           "bee",
        "beetle",     "butterfly",   "caprimulgus",       "caribou",
          "carp",           "cat",   "caterpillar",       "chicken",
    "chimpanzee",           "cod",        "cougar",           "cow",
          "crab",     "crocodile",          "deer",         "dingo",
           "dog",       "dolphin",          "dove",          "duck",
         "eagle",           "eel",      "elephant",           "elk",
        "ferret",      "flamingo",      "flounder",          "frog",
        "gerbil",       "giraffe",           "gnu",          "goat",
      "goldfish",       "gorilla",       "haddock",       "hamster",
          "hawk",      "hedgehog",           "hen",  "hippopotamus",
        "hyaena",        "iguana",       "jackass",      "kangaroo",
         "koala",       "lamprey",         "lemur",       "leopard",
          "lion",         "llama",       "lobster",        "monkey",
         "moose",      "mosquito",          "moth",         "mouse",
      "nematode",          "newt",       "octopus",       "opossum",
     "orangutan",        "osprey",         "otter",           "owl",
         "panda",       "panther",       "peacock",       "penguin",
      "pheasant",        "pigeon",           "pig",     "porcupine",
   "prairie-dog",        "quagga",         "quail",        "rabbit",
        "racoon",           "rat",    "rhinoceros",    "salamander",
    "sea-urchin",      "seahorse",          "seal",       "sealion",
     "semicolon",         "shark",        "shrimp",         "skunk",
         "snake",        "sphynx",        "spider",         "squid",
      "squirrel",      "starfish",      "tapeworm",         "tiger",
      "tortoise",          "tuna",        "turkey",        "turtle",
       "unicorn",       "varmint",          "vole",       "vulture",
        "walrus",       "warthog",        "weasel",        "weevil",
         "whale",     "woodlouse",    "woodpecker",          "worm",
          "yeti",         "zebra",          "zebu" };

const int num_animals = 127;

int search_for(const string wanted, const int minpos, const int maxpos)
{ // returns the position wanted was found at
  //         or -1 if not found
  cout << "minpos = " << minpos << ", maxpos = " << maxpos;
  const int mid = (minpos + maxpos) / 2;
  const string seen = animals[mid];
  cout << ", seen = " << seen << "\n";
  if (seen == wanted)
    return mid;
  if (seen < wanted)
    return search_for(wanted, mid + 1, maxpos);
  if (seen > wanted)
    return search_for(wanted, minpos, mid - 1); }

void main()
{ cout << "Enter a name: ";
  const string x = read_string();
  const int pos = search_for(x, 0, num_animals-1);
  if (pos == -1)
    cout << "NOT FOUND\n";
  else
  { cout << "Found at position " << pos << "\n";
    cout << "next animal is " << animals[pos+1] << "\n"; } }