Increment operator inside array

Question

I have a C program which does queue operations using an array. In that program, they increment a variable inside array. I can't understand how that works. So, please explain these operations:

array[++i];
array[i++];

Answer 1

Please explain these operations.

1. array[++i]; - first increments i, then gives you element at the incremented index

   equivalent to:

   ++i; // or i++
   array[i];
   

2. array[i++]; - also first increments i, but postfix operator++ returns i's value before the incrementation

   equivalent to:

   array[i];
   ++i; // or i++
   

They increment a variable inside array.

No, they don't. You could say they increment i within the call to array subscript operator.