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From: mrhoten@neon.Stanford.EDU (Matthew Paul Rhoten)
Newsgroups: comp.lang.c
Subject: Re: Float problems
Summary: testfloat()
Keywords: function calls need parentheses
Message-ID: <1991May25.234943.7283@neon.Stanford.EDU>
Date: 25 May 91 23:49:43 GMT
References: <1991May25.213301.13765@cs.mcgill.ca>
Organization: Computer Science Department, Stanford University
Lines: 26

In article <1991May25.213301.13765@cs.mcgill.ca> 
storm@cs.mcgill.ca (Marc Wandschneider) writes:
>#include<stdio.h>
>float testfloat (void);
>[...]
>	f = testfloat;
>[...]

The problem is that parentheses are needed in a call to a function with a 
void argument list. When I try and compile the code above, I get "Illegal
pointer arithmetic" or some such - because when I give the compiler the
token "testfloat" it matches it with a pointer-type. I think the 
interpretation of the error is implementation-dependent. To call the function,
simply include an empty set of parentheses after the function's name:

      f = testfloat();

This will work quite nicely. At least it did on my compiler.

Hope this helps.
 -matt


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