help: how to answer this question?

[test1999]

Write a function that would: return the 5th item in a singly linked list of integers and then provide a set of test cases against that function.

[darcymei]

int fun(int * head)
{
for(int i=0;i<4;i++)
head=head->next;
return head.data;
}

[hhlong]

keep a close eye on!!