// file: tr_tr_level_1.cc//// isip include files//#include "train_trace.h"#include "train_trace_constants.h"// method: get_level_cc//// arguments: none//// return: an int_4 with level //// this method gets the level//int_4 Train_Trace::get_level_cc() {  // get the level and exit gracefully  //  return level_d;}