Using C++ programming

4. (13\%) The span of a value v in an array x is the number of elements between the leftmost (smallest index) and rightmost (largest index) appearances of v (inclusive) in x. Write a function int maxspan (int x[.],intn ) ; that returns the largest span found in the parameter array x. For example, suppose array y has contents {3,7,4,2,4,7,7,2}, then the span of 3 is 1 ; the span of 7 is 6 ; the span of 4 is 3 ; and the span of 2 is 5. Thus, maxspan (y,8) should return 6 . You can assume that the parameter array x is of size n and n>0