Question

I was wondering if its possible to insert multiple elements in a node of a doubly linked list in C. I need this to be able to read in a file with contents such as:

00:00 67.7

00:01 67.6

00:02 67.7

00:03 67.6

00:04 67.6

00:05 67.3

00:06 67.4

and copy the first 4 numbers as 2 integers and the third as a float. i was hoping to put those 3 in a node of a doubly linked list to later on be able to compare them to numbers in other nodes. i was thinking of something along the lines of this:

while (fscanf(ifp, "%d:%d %d.%d ", &hour, &min, &tempI, &tempD) != EOF) {

int dlist_ins_next(Dlist *list, DlistElmt *element1, *element2, *element3, const void *int1, *int2, *float);
}

Answer 1

Since you wanted the third as a float value, change your scan function to :

fscanf(ifp, "%d:%d %f ", &hour, &min, &temp)

And you should be implementing the node as a structure :

struct node
{
  int hour;
  int min;
  float temp;

  struct node *next;
  struct node *prev;    
};