C++ Array Manipulation: Shifting and Summing Elements

The code initializes an array 'a' with the values 1, 1, 2, 3, 5, 8, 13, and 21. It then executes a loop five times. In each iteration, the loop shifts the array elements one position to the left. The last element is replaced with the sum of the three preceding elements. After the loop completes, the code prints the value at the 7th index of the array, which is 144.

Output: 144