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From: schaut@madnix.UUCP (Rick Schaut)
Newsgroups: comp.lang.c
Subject: Re: Pointers to functions on Xenix
Message-ID: <839@madnix.UUCP>
Date: 10 Sep 89 01:26:49 GMT
References: <1989Sep8.021802.29203@Octopus.COM>
Reply-To: schaut@madnix.UUCP (Rick Schaut)
Organization: ARP Software, Madison, WI
Lines: 26

In article <1989Sep8.021802.29203@Octopus.COM> stever@octopus.UUCP (Steve Resnick ) writes:
[Defines an array of structures where one element of the structure is
a pointer to a function returning an int.]
| /* When I get to the point where I execute an internal function, I call the
|    routine here..
| */
| 	(Cmds[idx].fptr)(c,v);	/* Here is where I call  the function */
| 
| This is what the compiler doesn't like. The error message is something like
| 
| Term does not evaluate to a function.

Exactly, the term evaluates to a pointer.  You need to go through a level
of indirection to get to the function that the pointer points to.  The
correct expression is:

	(*Cmds[idx].fptr)(c,v);

See K&R 5.11 (p. 118, 2nd Ed.).  See, also, operator precedence on p. 52.


-- 
   Richard Schaut
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