Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!ogccse!blake!ndsuvax!nebakke
From: nebakke@ndsuvax.UUCP (Jeff Bakke)
Newsgroups: comp.graphics
Subject: Function pointer help
Message-ID: <3003@ndsuvax.UUCP>
Date: 13 Oct 89 07:02:03 GMT
Reply-To: nebakke@ndsuvax.UUCP (Jeff Bakke)
Distribution: comp.lang.c
Organization: North Dakota State University, Fargo
Lines: 35

I have been working with function pointers in a program of mine and
have run into a stumper.  Maybe I'm just not reading the manuals
correctly but what syntax do I use for the following setup:

/* declaration */
void (*border)();     /* a function pointer to a window border function */

...

void set_user_border(void *user_border){

  border = user_border;
}

Now the problem occurs when I compile in that it returns an error
(turbo c 2.0 by the way) stating that I need a storage type or something
like that.

What I'm trying to do, is set border to point to a user defined border
function that is created outside of the library.  The user would call the
function as:
set_user_border(myfunction);
And then supposedly  border would then point to myfunction.  Somehow I
get the feeling that I'm setting up the parameter wrong but I don't know
what the correct declaration is.
I've tried (void (*user_border)()) but that still crashes.  

Could someone point me in the right direction.

Thanks for the help.


Jeff bakke
nebakke@plains.nodak.edu
nu113738@ndsuvm1.bitnet