// AP Computer Science, A Exam, 1996, Question 1, part B in C++

void Averages(const apvector<int>  & scores, 
              const apvector<char> & letters)
{
    char ch;
    for(ch = 'A'; ch <= 'D'; ch++)
    {
	cout << ch << "\t" << LetterAverage(scores,letters,ch) << endl;
    }
}