Suppose we want an array to satisfy the condition,

Question

```
a[0] <= a[1] <= a[2] <= ...
```
And suppose this code is written to implement a test of this condition
```
#include using namespace std;int main(){
double array[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };//
assume the array is filled somehow.for(int i=0; i < 10;
i++) if (array[i] > array[i+1]) cout < elements << i << i + 1 << are out of order.\n";
```
When this is run, we sometimes get the following puzzling output:
```
Array elements 9 and 10 are out of order.
Even more puzzling, sometimes we don’t get this output.
Why?
```
What will be an ideal response?

Answer 1

There is an index out of range. When index i has value
```
9, i + 1 is 10,
so a[i+1],
```
which is the same thing as
```
a[10]
```
causes an illegal access. The loopshould stop with one fewer iterations. To correct this code, replace the for loop header
with
```
for(int i=0; i < 9; i++)
```