e4d
Subj : Re: Class problems
To   : borland.public.cpp.borlandcpp
From : Ed Mulroy [TeamB]
Date : Sat Sep 11 2004 11:42 pm

Start by cleaning up the code.

The function main returns an int.  It does not return void.

You exit from main with a return statement such as
  return 0;
You do NOT exit from main by calling exit.

C++ functions, including constructors and destructors, that take no 
arguments have () and not (void).

If you have a problem then post compilable source.

..  Ed

> Mark Manning/Muniz Eng. wrote in message
> news:4143ab20$1@newsgroups.borland.com...
>
>I recently got the Borland C++v5.02 compiler et al.  I've done work 
>with C++ for years but the compiler is frustrating me.
>
> I am making a simple "create a name" program for our D&D game and 
> I've made a class called "Name".  It looks like this:
>
> /////////////////////////////////////////////////////////////////
> enum { gUC, gLC }; // Upper and lowercase ENUMs
> enum { gMale, gFemale ); // Character's gender
>
> class Name
> {
> private:
> <my variables>
>
> public:
> Name( void );
> ~Name( void );
>
> full( void ); // Return the full name.
> human( long optA ); // Create a human name.
> elf( long optA ); // Create an elven name.
> };
> ////////////////////////////////////////////////////////////////
>
> The main program looks like this:
>
> ////////////////////////////////////////////////////////////////
> #include "main.h"
>
> void
> main( int argc, char *argv[] )
> {
> Name myName;
>
> printf( "gUC = %d\n", gUC );
> myName.human( gMale );
> printf( "My name is: %s\n", myName.full() );
> exit( 0 );
> }
> ////////////////////////////////////////////////////////////////
>
> All of the functions are properly set in name.cpp.  Like so:
>
> ////////////////////////////////////////////////////////////////
> #include "main.h"
>
> Name::Name( void )
> {
> <Code to init the names>
> }
>
> Name::~Name( void )
> {
> }
>
> Name::full( void )
> {
> return( m_full );
> }
>
> Name::human( long optA )
> {
> <Code to create a human name>
> }
>
> Name::elf( long optA )
> {
> <Code to create an elven name>
> }
> ///////////////////////////////////////////////////////////////////
>
> The "main.h" file contains all of the includes to the various 
> classes.
>
> ///////////////////////////////////////////////////////////////////
> #include <stdio.h>
> #include <stdlib.h>
> .
> .
> .
> #include "name.h"
> ///////////////////////////////////////////////////////////////////
>
> Ok!  Now that you have all of that information - here is the 
> question:
>
> When I compile - it likes everything.  But when it reaches the 
> linker stage I get:
>
> Undefined Name::~Name()
> Undefined Name::human( long optA )
> Undefined Name::full()
>
> I've checked all of the functions.  I've tried commenting out each 
> of the above one after the other - no other error messages are 
> coming out of the linker.  Also, the first printf statement does not 
> give an error about gUC.  So I know it is getting name.h loaded.
>
> Why would the linker not like the functions themselves?  Also, under 
> gcc this compiles without a problem (linux) but Borland C++ v5.02 
> dies.  My next plan of attack is to delete and redo the project's 
> file.  Maybe that is the answer.  I recently decided to move 
> everything to a separate subfolder (called Character).  So maybe the 
> project file is messed up somehow.  Unknown but if you have an idea 
> I'd like to hear from you. (markem@ev1.net).
>
> TIA to anyone who has an idea on this problem.  :-)

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