4 static void quit (int);
11     quit (1);  in main()
13     quit (1);  in main()
15     quit (1);  in main()
17     quit (1);  in main()
19     quit (1);  in main()
21     quit (1);  in main()
23     quit (1);  in main()
25     quit (1);  in main()
27     quit (1);  in main()
28   quit (0);  in main()
37 quit (int status)  in quit()  function