为什么我的cin不工作

Question

大家好，我是一名刚刚开始编程的FSU学生，我很困惑为什么我的CIN无法正常工作。我知道我的代码看起来很有趣我们不允许使用很多东西，比如while语句等等。我发布了以下代码。我的主要问题是为什么在我输入cin >> QUANTITY;之后，程序中没有任何事情发生。

cout << "-------------------------------------" << endl;
cout << "     FLORIDA STATE UNIVERSITY" << endl;
cout << "     Ticket Information Dept." << endl;
cout << "-------------------------------------" << endl;
cout <<""<< endl;
cout <<""<< endl;
cout << "Please, enter your name" << endl;
cin >> name;
cout << "How many Florida State University credits have you completed?" << endl;
cin >> CREDITS;

if (CREDITS <0)
{
    cout<< "Bad data recieved." << endl;
}
else
{

    if (CREDITS <=30)
    {
        TICKETAMT=2;
        cout <<name << ", you are eligible for "<< TICKETAMT<< " tickets." << endl;
    }
    else if (CREDITS <=60)
    {
        TICKETAMT=4;
        cout <<name << ", you are eligible for "<< TICKETAMT<< " tickets." << endl;
    }
    else if (CREDITS <=90)
    {
        TICKETAMT=6;
        cout <<name << ", you are eligible for "<< TICKETAMT<< " tickets." << endl;
    }
    else 
    {
        TICKETAMT=8;
        cout <<name << ", you are eligible for "<< TICKETAMT<< " tickets." << endl;
    }

    cout << "Are you a Florida resident? Enter (Y)es or (N)o" << endl;
    cin >> RESIDENT;
    if (RESIDENT !='Y'||RESIDENT !='y'||RESIDENT !='N'||RESIDENT !='n')
    {
        if (RESIDENT=='Y'||RESIDENT=='y')
        {
            TIXPRICE=75;
        }
        else if (RESIDENT=='N'||RESIDENT=='n')
        {
            TIXPRICE=95;
        }

        cout << "Each ticket costs $" <<TIXPRICE<< endl;
        cout << "How many do you want?" << endl;
        cin >> QUANTITY;

        if (QUANTITY >TICKETAMT||QUANTITY <0)
        {
        cout << "Bad data -> number of tickets desired is not in range" << endl;
        }
        else
        {
        TOTALPRICE = TIXPRICE * QUANTITY;
        }
    }
    else
    {
        cout << "Bad data recieved" << endl;
    }

}