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=3.8 required=5.0 tests=BAYES_00,INVALID_MSGID, RATWARE_MS_HASH,RATWARE_OUTLOOK_NONAME 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: 103376,b87849933931bc93 X-Google-Attributes: gid103376,public X-Google-Thread: f43e6,b87849933931bc93 X-Google-Attributes: gidf43e6,public X-Google-Thread: 1108a1,b87849933931bc93 X-Google-Attributes: gid1108a1,public X-Google-Thread: 114809,b87849933931bc93 X-Google-Attributes: gid114809,public From: "Lee, Shih Hao" Subject: Re: C++ Class Date: 1997/02/13 Message-ID: <01bc1943$178dbf40$102348c0@tony.nec.com.tw>#1/1 X-Deja-AN: 218372477 References: <33018394.1718@scf.usc.edu> Organization: NEC Newsgroups: comp.lang.c++,comp.lang.smalltalk,comp.lang.eiffel,comp.lang.ada,comp.object,comp.software-eng Date: 1997-02-13T00:00:00+00:00 List-Id: Loc Minh Phan Van wrote in article <33018394.1718@scf.usc.edu>... > 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. > Declare the constructor of that class to be protected. class B { protected: B() { /*...*/} }; class D : public B { public: D() : B() { /*...*/} }; main() { D d; // OK! B b; // Error! } tony -- class Signature { static char *name, *belief, *URL, *eMail; }; char *Signature::name = "Lee, Shih Hao (Anthony Lee)"; char *Signature::belief = "Long live of Borland C++/OWL"; char *Signature::URL = "http://necta.nec.com.tw/~tony"; char *Signature::eMail = "mailto:tony@necta.nec.com.tw";