Fin Write a C++ program that prompts the user to input an integer (n) and outputs the sum of all integers i from 1 ton, but ifi = 2 is an integer) then i will have a negative sign. For example, for n = the sum is equal to -1 -2+3-4+5+6+7 -8= 6, because 1, 2, 4 and a are 2, 2.2 and 2 respectively while 3, 5, 6, and 7 are not equal to 2" for any integer . Tin n Note: Solve this question without defining any other function apart from the main function