C++

Assume entries in a linked list are of type struct listrec: struct listrec struct listrec next: Write a main) routine in which you create the following linked list: Hend Write a function called istsize that takes a pointer to the start of a linked list and returns the number of elements in the list, and another function called lisssum that also takes a pointer to the start of a linked list and returns the sum of the values of all elements in the list. In your main routine, you need to print out the results of these two functions on computer screen