Who wants to be a millionaire (special help option) : I have wrote a very very simple quiz c++ program (who wants to be a millionaire) which reads the questions from the file,
I would like to include a special help option which will skip the answer when used. The problem is that I do not want the user to use that option more than once, how can I do that.

       #include <iostream>
       #include <fstream>
       using namespace std;

       int main()
       {
    string a[15]; //Array which will take answers
    string print, print2; //Strings for printing questions
    ifstream answers("q&a.txt");
    cout << "Welcome to who wants to be a millionaire\n";
    while (answers) //Read questions from the file
    {
    getline(answers, print);
    auto position = print.find( "01." );
    if(position <= print.size())
    {
       print2 = print.substr(position + 1 );
        cout << print2 << endl << "A. Blackburn Losers\nB. Blackburn Rovers\nC. Blackburn Lovers\nD. BlackburnWanderers\n";
    }
        cin >> a[0];
        if (a[0] == "b") //If correct, proceed to next question
       {
            getline(answers, print);
            position = print.find("02.");
       }
        //If the answer is wrong, terminate the program
        if (a[0] != "b")
        {
            cerr << "We are sorry, you are wrong!\n";
        break;
        }
            if (position <= print.size())
            {
                print2 = print.substr(position + 1);
                cout << print2 << endl << "A. Fridge\nB. Bank\nC. Market\nD. Shoe\n";
            }
            cin >> a[1];
            if (a[1] == "b")
            {
                getline(answers, print);
            position = print.find("03");
            }
        if (a[1] != "b")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
            if (position <= print.size())
            {
                print2 = print.substr(position + 1);
                cout << print2 << endl << "A. Bassey\nB. Kwesi\nC. Abiodun\nD. Ejima\n";
            }
            cin >> a[2];
            if (a[2] == "b")
            {
                getline(answers, print);
            position = print.find("04.");
            }
        if (a[2] != "b")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
            if (position <= print.size())
            {
                print2 = print.substr(position + 1);
                cout << print2 << endl << "A. Inferno\nB. Domino\nC. Stiletto\nD. Tornado\n";
            }
            cin >> a[3];
            if (a[3] == "a")
            {
                getline(answers, print);
                position = print.find("05.");
            }
        if (a[3] != "a")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
                if (position <= print.size())
                {
                    print2 = print.substr(position + 1);
                    cout << print2 << endl << "A. Marry a wife\nB. Bury a dead parent\nC. Have thanksgiving in church\nD. Accept gifts or favour in kind\n";
            }
            cin >> a[4];
            if (a[4] == "d")
            {
                getline(answers, print);
            position = print.find("06.");
            }
        if (a[4] != "d")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
            if (position <= print.size())
            {
                print2 = print.substr(position + 1);
                cout << print2 << endl << "A. Tenacity\nB. Verifiability\nC. Hereditary\nD. Validation\n";
            }
        cin >> a[5];
        if (a[5] == "c")
        {
            getline(answers, print);
            position = print.find("07.");
        }
        if (a[5] != "c")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
        if (position <= print.size())
        {
            print2 = print.substr(position + 1);
            cout << print2 << endl << "A. Paris\nB. Copenhagen\nC. New York\nD. Madrid\n";
        }
        cin >> a[6];
        if (a[6] == "a")
        {
            getline(answers, print);
            position = print.find("08");
        }
        if (a[6] != "a")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
        if (position <= print.size())
        {
            print2 =  print.substr(position +1);
            cout << print2 << endl << "A. Mumbai\nB. Beijing\nC. Rio de Janeiro\nD. Seville\n";
        }
        cin >> a[7];
        if (a[7] == "b")
        {
            getline(answers, print);
            position = print.find("09");
        }
        if (a[7] != "b")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
        if (position <= print.size())
        {
            print2 = print.substr(position + 1);
            cout << print2 << endl << "A. A speed equal to that of sound\nB. A speed greater than that of sound\nC. A speed equal to that of light\nD. A speed greater than that of light\n";
        }
        cin >> a[8];
        if (a[8] == "b")
        {
            getline(answers, print);
            position = print.find("10.");
        }
        if (a[8] != "b")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
        if (position <= print.size())
        {
            print2 = print.substr(position + 1);
            cout << print2 << endl << "A. Nephrons\nB. Nerves\nC. Ligaments\nD. Stitches\n";
        }
        cin >> a[9];
        if (a[9] == "c")
        {
            getline(answers, print);
            position = print.find("11.");
        }
        if (a[9] != "c")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
        if (position <= print.size())
        {
            print2 = print.substr(position + 1);
            cout << print2 << endl << "A. Swimmer\nB. Referee\nC. Football Fan\nD. Judoka\n";
        }
        cin >> a[10];
        if (a[10] == "b")
        {
            getline(answers, print);
            position = print.find("12.");
        }
        if (a[10] != "b")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
        if (position <= print.size())
        {
            print2 = print.substr(position + 1);
            cout << print2 << endl << "A. France\nB. United States\nC. Germany\nD. India\n";
        }
        cin >> a[11];
        if (a[11] == "c")
        {
            getline(answers, print);
            position = print.find("13.");
        }
        if (a[11] != "c")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
        if (position <= print.size())
        {
            print2 = print.substr(position + 1);
            cout << print2 << endl << "A. Clint Eastwood\nB. Oliver Stone\nC. Peter Jackson\nD. Morgan Freeman\n";
        }
        cin >> a[12];
        if (a[12] == "a")
        {
            getline(answers, print);
            position = print.find("14.");
        }
        if (a[12] != "a")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
        if (position <= print.size())
        {
            print2 = print.substr(position + 1);
            cout << print2 << endl << "A. Lebanon\nB. Columbia\nC. Japan\nD. Eritrea\n";
        }
        cin >> a[13];
        if (a[13] == "b")
        {
            getline(answers, print);
            position = print.find("15.");
        }
        if (a[13] != "b")
        {
            cerr << "We are sorry, you are wrong!\n";
            break;
        }
        if (position <= print.size())
        {
            print2 = print.substr(position + 1);
            cout << print2 << endl << "A. Literature\nB. Economics\nC. Peace\nD. Medicine\n";
            cin >> a[14];
        }
        if (a[14] == "c")
        {
            cout << "Congratulations!\nYou won a million dollars!\n";
        break;
        }
        if (a[14] != "c")
            cerr << "We are sorry, you are wrong!\n";
        break;
    }
    return 0;
    }

Questions:

       01. Which of these is the name of a British Football Club?
       02. An establishment where money can be deposited or withdrawn is       called what?
       03 Name given to a boy born on Sunday in Ghana is what?
       04. Which of the following refer to the word fire?
       05. According to the constitution a public officer is not allowed to do which of these?
       06. The process by which genetic traits are transmitted from parents        to offspring is called what?
       07. Roland Garros stadium is in which city?
       08. Where is Tiananmen Square?
       09. The word supersonic denotes which of these?
       10. Which of these holds bones together at the joints of the body?
       11. Linus Mbah achieved fame in Nigerian sporting circles as what?
       12. DAX refers to the stock market of which country?
       13. Who won the Academy Award for directing the movie ‘Million    Dollar Baby’?
       14. In which country is the Galeras Volcano?
       15. Professor Maathai Wangari won the Nobel Prize for which of these?


Answers:

       1 (B)
       2 (B)
       3 (B)
       4 (A)
       5 (D)
       6 (C)
       7 (A)
       8 (B)
       9 (B)
       10 (C)
       11 (B)
       12 (C)
       13 (A)
       14 (B)
       I15 (C)