For future labs, provide hard-coded test harnesses instead of requiring user input about pdr HOT 2 CLOSED

int main() {
  AVLTree avl;
  while (cin.good()) {
    string instr, word;
    cin >> instr;
    cin >> word;
    if (instr == "I") {
      avl.insert(word);
    } else if (instr == "R") {
      avl.remove(word);
    } else if (instr == "L") {
      cout << "AVL path: " << avl.pathTo(word) << endl;
      /* pseudocode:
       if (input file == testfile1.txt)
           cout << "problems can't kind created" << endl;

       --- and likewise for the other two test files ---
       */
    }
  }
  cout << "AVL numNodes: " << avl.numNodes() << endl;
}