From: Charles Krug <charles AT mail DOT pentek DOT com>
Newsgroups: comp.lang.c++,comp.os.msdos.djgpp
Subject: Re: How to implement "They are all Vectors, but different realities?"
Date: Thu, 21 Jan 1999 09:55:51 -0500
Organization: Pentek Corporation
Lines: 28
Message-ID: <36A73FF7.8B9C1DB2@mail.pentek.com>
References: <36A68B87 DOT FFBA110C AT ohriki DOT t DOT u-tokyo DOT ac DOT jp>
NNTP-Posting-Host: mail.pentek.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 4.5 [en] (WinNT; U)
X-Accept-Language: en
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Shue-Cheng CHEN wrote:

> Hi!
>
>      We know "Force" and "Velocity" are both "Vectors" in mathematics, so
> I defined them to own all behaviors and data of Vector (has been defined),
> without duplicating the code, as follows,

First, look into valarray<T> from the standard library.  That should have the
Vector functions you need to do vector math.

From that, simply use:

class Force : public valarray
{
;
}
class Velocity : public valarray
}
;
}

That way, if you attempt to mix Force and Velocity, the compiler will complain.


Charles