Thread: vector problem with erase()

ok im reading a c++ book called beginning c++ game programming and doing one of the exercises in it which is:

write a program using vectors and iterators that allows a user to maintain a list of his or her favorite games. The program should allow the user to list all game titles, add a game title, and remove a game title.

I finished the code and upon running everything seems to work except one thing. When i try to remove the last game in the list it freezes and has to be ended. Ive tested everything else and that seems to be the only problem and I have no idea why, so if someone could help me I would be very grateful. Don't know if it matters, but im using Dev-C++.

Code:

#include <vector>
#include <iostream>
#include <string>

using namespace std;

int main()
{
    vector<string> favGames;
    
    vector<string> choices;
    choices.push_back("add");
    choices.push_back("remove");
    choices.push_back("end");
    
    vector<string>::const_iterator iter;
    
    string gameTitle;
    string choice;
    
    bool cont = true;
    
    cout << "Use this program to make and modify a list of your favorite games.\n";
    
    while(cont==true)
    {
         if(favGames.empty())
              cout << "\nYour list is currently empty.\n";
         else // displays list
         {     
               cout << "\nFavorite Game list:\n";
               for(iter = favGames.begin(); iter != favGames.end(); ++iter)
                   cout << *iter << endl;
         }
         
         do
         {
              cout << "\nadd remove or end? ";
              cin >> choice;
         
              if(choice == choices[0])
              {
                   cout << "Whats the name of the game to add?\n";
                   cin  >> gameTitle;
                   favGames.push_back(gameTitle);
                   break;
              }
              else if(choice == choices[1])
              {
                   if(favGames.empty())
                   {
                        cout << "Your list is already empty.\n";
                        break;
                   }
                   cout << "Whats the name of the game to remove?\n";
                   cin  >> gameTitle;
                   int pos = 0;
                   int oldSize = favGames.size();
                   for(iter = favGames.begin(); iter != favGames.end(); ++iter)
                   {
                        if(gameTitle == *iter)
                             favGames.erase(favGames.begin()+ pos);
                        ++pos;
                   }
                   if(oldSize == favGames.size())
                        cout << "No such game in the list.\n";
                   break;
              }
              else if(choice == choices[2])
              {
                   cout << "Goodbye.\n";
                   cont = false;
                   break;
              }
              else
              {
                   cout << "Please choose valid choice";
              }
         }while(true);
    }
    system("PAUSE");
    return 0;
}