Write a C++ program that takes in a sequence of positive integers inputted by the user, and outputs the alternating sum of all the inputs. It should work for any other inputs. For example, if the user inputs

1 4 9 16 9 7 4 9 11

then your program should compute

1 - 4 + 9 - 16 + 9 - 7 + 4 - 9 + 11 = -2

( Other example of outputs :

Enter numbers (Q when done): 1 2 3 4 5 Q

Alternating sum: 3

(without using stdafx)