bulls and cows number guessing game

//	Philipp Siedler
//	Bjarne Stroustrup's PP
//	Chapter 5 Exercise 12

//input: 4621
//input: 4567
//input: 1234

#include "std_lib_facilities.h"

int main()
try
{
    int guess;
    int bulls = 0;
    int cows = 0;

    vector<int> guessVec;
    vector<int> numToBeguessed{ 1,2,3,4 };

    cout << "Enter 4 different digit number each ranging from 0 to 9 (for example 4567):\n";
    while (bulls != 4)
    {
        bulls = 0;
        cows = 0;
        if (cin >> guess)
        {
            if (guess / 1000 >= 1 && guess / 1000 < 10)
            {

                guessVec.push_back(guess / 1000 % 10);
                guessVec.push_back(guess / 100 % 10);
                guessVec.push_back(guess / 10 % 10);
                guessVec.push_back(guess / 1 % 10);

                for (int i = 0; i < guessVec.size() - 1; i++)
                {
                    if (guessVec[i] == guessVec[i + 1])
                    {
                        error("Enter 4 different numbers.");
                    }
                }

                for (int i = 0; i < guessVec.size(); i++)
                {
                    for (int j = 0; j < guessVec.size(); j++)
                    {
                        if (numToBeguessed[j] == guessVec[i] && i == j)
                        {
                            bulls++;
                        }
                        else if (numToBeguessed[j] == guessVec[i])
                        {
                            cows++;
                        }
                    }
                }
            }
            else
            {
                error("Enter a 4 digit number.");
            }
        }
        else
        {
            error("Enter a number.");
        }

        cout << "Bulls: " << bulls << " Cows: " << cows << "\n";
        guessVec.clear();
    }

    cout << "You win!\n";
    keep_window_open(".");
}

catch (runtime_error e)
{
    cout << e.what() << "\n";
    keep_window_open(".");
}
catch (...) {
    cout << "Extiting" << "\n";
    keep_window_open(".");
}