How Not to Program in C++

44 Chapter 4

Program 31: Very Small Numbers

This programmer was smart. He decided to use bitfields to store flags to avoid

the problems seen in Program 30. But he creates his own new set of problems:

1 /************************************************

2 * printer status -- Print the status of the *

3 * printer. *

4 ************************************************/

5 #include <iostream>

6

7/*

8 * Printer status information.

9*/

10 struct status {

11 // True if the printer is on-line

12 int on_line:1;

13

14 // Is the printer ready

15 int ready:1;

16

17 // Got paper

18 int paper_out:1;

19

20 // Waiting for manual feed paper

21 int manual_feed:1;

22 };

23

24 int main() ...