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Write a C++ program that prompts the user to input an integer and outputs the sum of all integers i from 1 to n, but if i = 2j (j is an integer) then i will have a negative sign. For example, for n = 8 the sum is equal to - 1 - 2 + 3 - 4 + 5 +6+7 -8= 6, because 1, 2, 4 and 8 are 20, 21 , 22 and 23 respectively while 3, 5, 6, and 7 are not equal to 2j for any integer j. Note: Solve this question without defining any other function apart from the main function