From: Erik Max Francis Newsgroups: comp.os.msdos.djgpp Subject: Re: pointer trouble... need help Date: Sat, 01 Mar 1997 14:58:38 -0800 Organization: Alcyone Systems Lines: 38 Message-ID: <3318B49E.78D96981@alcyone.com> References: <5f9tk7$2mg AT nr1 DOT toronto DOT istar DOT net> NNTP-Posting-Host: newton.alcyone.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Jeff Weeks wrote: > typedef struct { int h,c; } buf_data; ... > tbuf *buf_data; > bbuf *buf_data; This should be buf_data *tbuf; buf_data *bbuf; > tbuf = new buf_data[video.max_x]; > bbuf = new buf_data[video.max_x]; > > and now I want to copy the values from bbuf to tbuf. The following > should work shouldn't it? > > tbuf = bbuf; > > because it would copy the address of bbuf into tbuf right? Are you trying to copy the pointers or copy _what bbuf_ is pointing to into what tbuf is pointing to? If it's the former, then the above is correct, but now what tbuf was originally pointing to is lost (you have no more references to it). If you want to copy what is being referenced by those pointers, then you need memcpy(tbuf, bbuf, video.max_x*sizeof(buf_data)); -- Erik Max Francis, &tSftDotIotE / email: max AT alcyone DOT com Alcyone Systems / web: http://www.alcyone.com/max/ San Jose, California, United States / icbm: 37 20 07 N 121 53 38 W \ "I am become death, / destroyer of worlds." / J. Robert Oppenheimer (quoting legend)