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: fac41,9a0ff0bffdf63657 X-Google-Attributes: gidfac41,public X-Google-Thread: f43e6,9a0ff0bffdf63657 X-Google-Attributes: gidf43e6,public X-Google-Thread: 1108a1,9a0ff0bffdf63657 X-Google-Attributes: gid1108a1,public X-Google-Thread: 103376,4b06f8f15f01a568 X-Google-Attributes: gid103376,public From: Tim McDermott Subject: Re: Software landmines (loops) Date: 1998/09/08 Message-ID: <35F56A3B.8DEA51A7@draper.com>#1/1 X-Deja-AN: 389096757 Content-Transfer-Encoding: 7bit References: <35f23ce2.7649859@news.erols.com> <6snn1b$c90$1@hirame.wwa.com> <35ef7dff.24318728@news.erols.com> <35f79e53.98130474@news.erols.com> Content-Type: text/plain; charset=us-ascii Organization: CSDL-DC Mime-Version: 1.0 Newsgroups: comp.lang.eiffel,comp.object,comp.software-eng,comp.lang.ada Date: 1998-09-08T00:00:00+00:00 List-Id: Matthew Heaney wrote: > (start of quote) > The dowhiledo structure has general form > > do1 > dopart1 > while > whiletest > do2 > dopart2 > od snip > Conclusion: Feel free to exit from the middle of a loop. As defined, you can exit from the middle of a dowhiledo, but not from the top or bottom. This is still a se/se structure. You can't use this structure to justify multiple returns. Note too, that Chapter 3 deals with PDL. in Chapter 4, (titled "Structured Programming") Paragraph 4.2.2 states: "A _proper program_ [Mills italics - Tim] is a program with a control stucture that 1. has a single entry line and a single exit line, and 2. for each node, has a path through that node from the entry line to the exit line." Tim