Chapter 7, Problem 7.17E

( What Does This Code Do?) What does the following program do?

1. // Ex. 7.17: Ex07_17.cpp
2. // What does this program do?
3. #include <iostream>
4. #include <array>
5. Using namespace std:
7. Const size_t arraySize {10}:
8. Inst whatIsThis (const array &, size_t); // prototype
10. Int main ( ) {
11. Array a{1,2,3,4,5,6,7,8,9,10};
13. Int result {whatIsThis (a, array Size) };
15. Cout << “Result is “ << result << end ] ;
16. }
18. // What does this function do ?
19. Int whatIsThis (const array <int, arraySize>& b, size_t size ) {
20. If (size==1) { // base case
21. Return b[0];
22. }
23. Else { // recursive step
24. Return b[size-1] + whatIs This(b, size-1);
25. }
26. }