C++ Array Manipulation: Shifting Values and Calculating Sum

The code initializes an integer array 'a' with the values {1, 1, 2, 3, 5, 8, 13, 21}. It then iterates through a loop 5 times. In each iteration, it shifts the values in the array over by one index. The value at index n+3 is then set to the sum of the previous 3 values (a[n], a[n+1], a[n+2]).

After the loop, the code prints out the value at index 7 of the array, which was modified by the loop. The output of this code would be 72.