Hey guys,

I searched before I decided to post but to no avail. Basically, my situation is that I'm learning C++ through a really informative book called Beginning C++ Game Programming by Michael Dawson. I just reached a section where the author demonstrates how to create the source code for a game of Hangman. I copied his version of the game word for word and tried to compile it (I got a used version of the book, so the CD that contains all the original files discussed in the book is not in my possession), but it gave me quite a few compile errors--which may be due to syntax errors, but I can't seem to locate any.

This is what the program looks like:
Code:
//Hangman

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <ctime>
#include <cctype> // cctype is part of the standard lib and it includes functions for converting
//characters to uppercase, which is used in order to compare individual letters

int main()
{
    //setup
    const int MAX_WRONG = 8; //max number of incorrect guesses
    
    vector<string> words; //collection of possible words to guess
    words.push_back("CONGLOMERATION");
    words.push_back("TELEOLOGY");
    words.push_back("TACITURN");
    
    srand(time(0));
    random_shuffle(words.begin(), words.end()); //words are shuffled so index position '0' will be random
    const string THE_WORD = words[0];
    int wrong = 0;
    string soFar(THE_WORD.size(), '-');
    string used = "";
    
    cout << "Welcome to Hangman!\n";
    
    while ((wrong < MAX_WRONG) && (soFar != THE_WORD))
    {
          cout << "\n\nYou have " << (MAX_WRONG - wrong) << " incorrect guesses left.\n";
          cout << "\nYou've used the following letters:\n"; << used << endl;
          cout << "\nSo far, the word is:\n" << soFar << endl;
          
          char guess;
          
          cout << "\n\nEnter your guess: ";
          cin >> guess;
          guess = toupper(guess); //make uppercase since secret word is in uppercase
          while (used.find(guess) != string::npos)
          {
                cout << "\nYou've already guess " << guess << endl;
                cout << "Enter your guess: ";
                cin >> guess;
                guess = toupper(guess);
          }
          
          used += guess;
          
          if (THE_WORD.find(guess) != string::npos)
          {
                                   cout << "That's right! " << guess << " is in the word.\n";
                                   
                                   //update soFar to include newly guessed letter
                                   for (int i = 0; i < THE_WORD.length(); ++i)
                                       if (THE_WORD[i] == guess)
                                          soFar[i] = guess;
          }
          else
          {
              cout << "Sorry, " << guess << " isn't in the word.\n";
              ++wrong;
          }
    }
    //shut down
    if (wrong == MAX_WRONG)
       cout << "\nYou've been hanged!";
    else
        cout << "\nYou guessed it!";
    cout << "\nThe word was " << THE_WORD << endl;
    
    system("Pause");
    
}
And here's the error it's giving me: "`vector' undeclared (first use this function) ". I'm using Dev-C++ version 4.9.9.2. I can't find what the error is, I'm sure it is something really simple that I'm just not seeing. Any help would be very much appreciated from this noob programmer!

Thanks!