Reverse an Array In Place

Instead of just printing an array backwards, here you actually rearrange the array itself so its elements end up in reverse order. The trick is to swap the first element with the last, the second with the second-to-last, and so on, only going halfway (size / 2 swaps). Each swap needs a temporary variable to hold one value while you move the other. After reversing, print all elements separated by spaces, with no trailing space.