Need the whole code which uses the function given in question. Need ans urgently plz.

Task 03 What is the following function's output for a start point to the first node of the following linked list? 1>2>3>4>5>61 void fun(struct node* start) { if(start=NULL) return printf("%d "start->data): if(start->next != NULL) fun(start->next->next): printf("%d ", start->data)