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From: dave@andromeda.UUCP (Dave Bloom)
Newsgroups: net.lang.c
Subject: Pointers to Functions
Message-ID: <59@andromeda.UUCP>
Date: Thu, 9-Jan-86 13:46:33 EST
Article-I.D.: andromed.59
Posted: Thu Jan  9 13:46:33 1986
Date-Received: Sat, 11-Jan-86 05:40:25 EST
Organization: Rutgers University, Newark, N.J.
Lines: 44

<>
Here's a good(?) question. Lets say I have this:

main()
{
	int a(), b();  /* defined somewhere else */
	int (*c)();    /* a pointer to a function returning int (K&R pg141) */
		.
		.
		.
	c = b;
	(*c)(some arguments);
}

Our compiler claims c is an "illegal function", yet the following it
permits:

main()
{
	int a(), b();

	a(b);
}
a(x)
int (*x)();
{
	(*x)(some arguments);
}

Looks like I'm missing something. Can anyone out the lend me a hand???
What is it that's wrong in example one? How can I declare a generic pointer
to an int-function, set it equal to the address of a valid int function,
and use it instead of the function????

Thanx.
-- 

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