print_test(line,flt)
int line, flt ;
{ int i ;

  printf("\n") ;
  printf("a test for line %s stuck at %d is :\n",line_list[line].user_name,flt);
  for (i=first_pi ; i < first_po ; i++)
    { pi_val = line_list[gate_list[i].q].value ;
      printf("pi %s = %d\n",gate_list[i].user_name, pi_val) ;
    }
}