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Engineering · Computer Science
Question details

I'm wondering how to do the following in C:

Write a function that returns the first node
of a linked list.

Your function's prototype is as follows:

int getFirst(struct node *LL, int *error);

and operates as follows:

  • LL is an array of struct nodes *containing a linked list*
  • LL[0] is assumed to be a sentinal node, and is always present
  • LL[0].next is the index of the first data node
  • If there is a first data node, your function should return that value as the function value, and should set *error to 0
  • If however the list is empty (no first data node exists), the function should return 0, and should set *error to 1
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