Help coders of MAL (C++)

int x = 0, wrong = 0, correct = 0;

while(x < 2)
{
  bool valid = false;
  while(!valid)
  {
    cout << "Enter your answer for question " << x + 1 << endl;
    cin >> user_answers[x];

    if(user_answers[x] == 'A'
      || user_answers[x] == 'B'
      || user_answers[x] == 'C'
      || user_answers[x] == 'D')
    {
      valid = true;
    }
    else
    {
      cout << "Invalid input.  Enter only: A, B, C, or D.  Try again." << endl;
    }
  }

  x++;
}

Enter your answer for question 1
z
Invalid input.  Enter only: A, B, C, or D.  Try again.
Enter your answer for question 1
B
Enter your answer for question 2
A
Answer 2 Wrong
Results (minimum 15 correct to pass):
You got 1 correct.
You missed 1
You've failed.