Question

C Programming

Explain what these function(s) do:

struct thing{

int x;

float y;

};

struct node {

struct thing *t;

struct node *next;

struct node *prev;

};

struct dll{

struct node *head;

struct node *tail;

int length;

};

struct thing *func( struct dll *list, int num) {

struct node *curr = list ->head;

while(curr != list ->tail) {

if(curr ->t->x== num)

return curr->t;

curr=curr->next;

}

return NULL;

}

Answer 1

this function 'func' takes a doubly linked list 'list' and an integer 'num' as parameters.
this function searches for 'num' in doubly linked lists' nodes, and returns the 'thing' object which contains 'num' as 'x' in the thing.
if 'num' is not found in 'dll', this function returns a NULL