Chapter 7.1, Problem 8STE

Suppose we expect the elements of the array a to be ordered so that

  a [0] ≤ a [1] ≤ a [2] ≤ …

However, to be safe we want our program to test the array and issue a warning in case it turns out that some elements are out of order. The following code is supposed to output such a warning, but it contains a bug. What is it?

  double a[10];

  <Some code to fill the array a goes here.>

  for (int index = 0; index < 10; index++)

  if (a[index] > a[index + 1])

  cout << “Array elements ” << index << “ and”

 << (index +1) << “are out of order.”;