Write a function for given main function (15pt) int* return_an_array(int n) which takes an integer n and returns a pointer to an array (allocated off of the heap in the function) containing the digits of n in the appropriate positions. If n = 0 return 0 (which is the "null" pointer). Recall an array name is just a pointer to the first element of the array. Use following main() to test your function. int main() { int *a = return_an_array(23542);// array of size 5 for(int i=0;i