OOP344 Queue class functions

I would write the two functions as follows:
Again, the header file Fardad has provided needs to be modified so that it returns by reference.

int& Queue::operator[](unsigned int index){
  Node* tempNode =_head;
  int i;
  for (i=0; i<index%size();i++){
    tempNode = tempNode->_next;
  }
  return tempNode->_data;
}

unsigned int Queue::size(){
  Node* tempNode =_head;
  unsigned int count = 0;
  while (tempNode){
    tempNode = tempNode->_next;
    count++;
  }
  return count;
}