Let’s see the add method of the List class: /* add() class method */ void add (int addObject) { 1.    Node * newNode = new Node(); 2.    newNode->set(addObject); 3.    if( currentNode != NULL ) 4.    { 5.       newNode->setNext(currentNode->getNext()); 6.       currentNode->setNext( newNode ); 7.       lastCurrentNode = currentNode; 8.       currentNode = newNode; 9.    } 10.   else 11.  { 12.       newNode->setNext(NULL); 13.       headNode->setNext(newNode); 14.       lastCurrentNode = headNode; 15.       currentNode = newNode; 16.    } 17.    size ++; }
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