C exercises and solutions: count elements


Circularly Linked List

Count elements of circularly linked list

Step 3: Count elements of the circularly linked list To count all elements of the circularly linked list, we will need a loop to traverse through the circularly linked list. We will let a pointer (i) of ListElem type to point to the pfirst then move the pointer to its next element and increase the number of item(t) one at a time by using a while loop until the end of the circularly linked list is reached.   //C code to count the number of items in the list
int countitem(ListElem *L)
{
  ListElem *i;
  int t;
  i=L;
  if(L!=NULL){
     t=1;
     i=i->next;
    while(i!=L){ //not the end of the list
        t=t+1;
        i=i->next;

  }
    return t;
}

   else return 0;

}


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