From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fac41,b87849933931bc93 X-Google-Attributes: gidfac41,public X-Google-Thread: 109fba,b87849933931bc93 X-Google-Attributes: gid109fba,public X-Google-Thread: 1108a1,b87849933931bc93 X-Google-Attributes: gid1108a1,public X-Google-Thread: f43e6,b87849933931bc93 X-Google-Attributes: gidf43e6,public X-Google-Thread: 114809,b87849933931bc93 X-Google-Attributes: gid114809,public X-Google-Thread: 103376,b87849933931bc93 X-Google-Attributes: gid103376,public From: Vlastimil Adamovsky Subject: Re: C++ Class Date: 1997/02/12 Message-ID: <3301FFB6.129A@merck.com>#1/1 X-Deja-AN: 219245849 References: <33018394.1718@scf.usc.edu> <5dsgh1$hlt@nnrp1.farm.idt.net> Content-Type: text/plain; charset=us-ascii Organization: Merck & Co., Inc. Mime-Version: 1.0 Newsgroups: comp.lang.c++,comp.lang.smalltalk,comp.lang.eiffel,comp.lang.ada,comp.object,comp.software-eng X-Mailer: Mozilla 2.02 (Win16; I) Date: 1997-02-12T00:00:00+00:00 List-Id: Keith P. Boruff wrote: > > Loc Minh Phan Van wrote: > > > > Hi, > > Is there anyway that we can Define a class that can not be instantiated > > in any way by the user (that is, you can not have objects of that type), > > but it can be used as a base class. > > > > Read about polymorphism and virtual functions. > Read about "Abstract classes" and pure virtual functions. Vlastimil Adamovsky The contents of this message express only the sender's opinion. This message does not necessarily reflect the policy or views of my employer, Merck & Co., Inc. All responsibility for the statements made in this Usenet posting resides solely and completely with the sender.