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From: tiemann@eng.sun.com (Michael Tiemann)
Newsgroups: gnu.g++.help,comp.lang.c++
Subject: Header file problems
Message-ID: <9102050316.AA10014@teacake.Eng.Sun.COM>
Date: 5 Feb 91 03:16:38 GMT
References: <cbfAlqK00VpDF3C0ck@andrew.cmu.edu>
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   Date: 4 Feb 91 02:52:38 GMT
   From: jz0o+@andrew.cmu.edu  (Jason Yeoung Zien)
   Organization: Class of '91, Carnegie Mellon, Pittsburgh, PA
   Sender: help-g++-request@prep.ai.mit.edu


   I am having problems incorporating K&R style header files into my C++
   programs.  g++ doesn't seem to like them at all.

   I have this following very simple header file & program, which will not
   compile with g++:

   func.c
   ------------------------------------
   #include "func.h"

   func(i)
   int *i;
   {
     *i = 22;
   }
   --------------------------------------

   func.h
   ---------------------------------------
   /*  func(int *); */
   func();

   test.c
   ---------------------------------
   #include <stdio.h>
   #include "func.h"

   main()
   {
     float i=11.11;
     int num;

     func(&num);
     printf("Starting. %d\n",num);

   }

   When it compiles, it gives the following errors/warnings:
   g++ func.o test.c
   In file included from test.c:2:
   func.h:2: warning: data definition lacks type or storage class
   func.h: In function int main ():
   func.h:2: too many arguments to function `int func ()'
   test.c:9: at this point in file

   What can I do to correct this problem?  I tried using:
   g++ -traditional func.o test.c,
   but that gives the error:  

   test.o: Undefined symbol func(...) referenced from text segment

   Any help would be much appreciated.

Read g++.texinfo about why this doesn't work.

Michael