Adding two integers-CS 62December-1999

Q.1.(a) Write a routine in C for adding two integers represented by doubly linked lists.
Answer: NODEPTR addint (NODPTR p, NODEPTR q)
{
/* check if integers are of like sign */
if(p->info * q ->info >0)
return (addsame(p,q));
/* check which has a larger absolute value */
if(compabs(p,q)>0)
return (addiff(p,q));
else
return (addiff(q,p));
}