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From: smiller@umn-cs.UUCP (Steven M. Miller)
Newsgroups: comp.lang.c
Subject: enum type
Message-ID: <2048@umn-cs.UUCP>
Date: Thu, 20-Aug-87 12:48:08 EDT
Article-I.D.: umn-cs.2048
Posted: Thu Aug 20 12:48:08 1987
Date-Received: Sat, 22-Aug-87 12:48:29 EDT
Organization: University of Minnesota, Minneapolis
Lines: 49

I've never used the enum type in C before and am having some minor struggles
with it.

I've seen several examples with enum types where the type is used as 
below.

enum color { yellow, green, red };

main()

	enum color marker;

	for (marker = yellow ; marker != red ; marker++)
	{
		/* some code here */
	 }
}

The compilers on the Sun and on a Honeywell x20 both complain that
the operands of ++ in the for line are of incompatible types.

Is there any way to make the above work without a lot of casts?


I've also found that lint complains heavily about the following use of
enums.

main()
{
	enum color pen;

	func( &pen );

}

func( marker )
enum color *marker;
{
  /* some code here */
}


Here lint complains that the the argument to func is used inconsistently.
The code runs fine, but why does lint complain? 


By the way does the ANSI C standard do anything new with enums? like
provide succ(), pred(), lower(), and upper() functions that operate
on enum types?