c++ - 在确定数组的总数和平均值时，如何阻止将哨兵值读入数组？

Question

我不确定如何阻止我的标记值被读入我的数组，这会导致我的总计和平均计算出错。谁能帮忙？

这是 while 循环:

while (grade != -1)
{
    cin >> grade;
    gradesArray[count] = grade;
    total += gradesArray[count];
    average = total / count;
    count++;
}

cout << "You have entered " << count << " grades." << endl;
cout << "The average of these grades is " << average << endl;

Answer 1

while (std::cin >> grade && grade != -1)