Write a program that will first read in a positive integer number, say n, from standard input. Then you need to create enough space in the heap via a call to malloc to hold an array of n integers. You then need to use array index operators to fill the array with n integer values entered by the user via calls to scanf. The index operator is also referred to as a subscript operator (i.e., A[i]). After the array has been filled with numbers, your program should walk down the array and build their sum. Print out the sum.