// file: sig_get_6.cc//// isip include files//#include "Signal.h"#include "signal_constants.h"// method: get_end_file_time_cc//// arguments: none//// return: float_4 indicating the length of this file in seconds//float_8 Signal::get_end_file_time_cc() {  // return the end of file time  //  return end_file_time_d;}