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=0.7 required=5.0 tests=BAYES_00,MSGID_RANDY autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 109fba,e1a91c4d90acda97 X-Google-Attributes: gid109fba,public X-Google-Thread: 103376,e1a91c4d90acda97 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-01-18 11:21:16 PST Path: supernews.google.com!sn-xit-02!supernews.com!news.gv.tsc.tdk.com!hub.org!hub.org!newsfeed.direct.ca!look.ca!newsfeed.skycache.com!Cidera!news.maxwell.syr.edu!nntp2.deja.com!nnrp1.deja.com!not-for-mail From: Ted Dennison Newsgroups: comp.lang.ada,comp.lang.c++ Subject: Re: Safety-Critical Systems Developed Using C++ Date: Thu, 18 Jan 2001 19:12:28 GMT Organization: Deja.com Message-ID: <947f6k$lla$1@nnrp1.deja.com> References: <945eeq$vmk$1@nnrp1.deja.com> <3A664EC4.6F679BE0@acm.org> <9471rc$8cj$1@nnrp1.deja.com> NNTP-Posting-Host: 204.48.27.130 X-Article-Creation-Date: Thu Jan 18 19:12:28 2001 GMT X-Http-User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; 0.7) Gecko/20010109 X-Http-Proxy: 1.0 x56.deja.com:80 (Squid/1.1.22) for client 204.48.27.130 X-MyDeja-Info: XMYDJUIDtedennison Xref: supernews.google.com comp.lang.ada:4181 comp.lang.c++:40429 Date: 2001-01-18T19:12:28+00:00 List-Id: In article , sahan_aDOG@amarasekera.freeserve.co.uk wrote: > On Thu, 18 Jan 2001 15:24:41 GMT, Ted Dennison > wrote: > >That's interesting. Rational performed a similar study on their > >compiler codebase using data culled over 11 years of development, and > >found that their Ada code had 1/7th the defect rate of their C code > >and requied only half as many fixes per SLOC. > > Did they get any data on how Ada compared to C++ ?? No. Their data was collected over an 11-year period ending at about 1994, during which no C++ code existed in their codebase (and precious little outside of it). They do address C++ in the last section: "Some may look at this study and conclude that C++ will tame C's problems. Our early experience does not support that conclusion. Bug rates in C++ are running even higher than C,..." However, there is no hard data presented, so I'd take this section with a grain of salt (if not a whole shaker). -- T.E.D. http://www.telepath.com/~dennison/Ted/TED.html Sent via Deja.com http://www.deja.com/