From: alainm AT news DOT RISQ DOT QC DOT CA (Alain Magloire)
Subject: Re: djgpp strangeness
Newsgroups: comp.os.msdos.djgpp
References: <tmU74.34$Fc6 DOT 1542 AT weber DOT videotron DOT net> <14684.897$Qz2 DOT 16629 AT wagner DOT videotron DOT net>
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Date: Thu, 23 Dec 1999 01:00:40 GMT
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

If you are writting in C++, then do.  If you want to use C, then use C.
malloc/free are not the preferred way to allocate objects and manage memory,
in C++. 

I do not remember what the std say, but malloc() will give
uninitialized memory, and free () is not even require to invoke the 
destructor, when the object is collected.

Use new and delete.

--
alain

Valkir (jfd50 AT videotron DOT ca) wrote:
: Here's the code:
: int main()
: {long x,y;
:  uchar *Video;
:  Buffer=(uchar *)malloc(1920000);
:  cVesa *Vesa=(cVesa *)malloc(sizeof(cVesa));
:  Video=Vesa->InitVesa();
: //////// cDesktop *Deskt=(cDesktop *)malloc(sizeof(cDesktop));
:  for(x=0;x<800;x++)
:   for(y=0;y<2400;y++)
:    *(Buffer+y*800+x)=x;

:  memcpy(Video,Buffer,1920000);
:  getkey();
:  Vesa->Close();
:  return(0);
: }

: if I remove the command with lots of comments, it work, but if I enable it,
: it doesn't enable my vesa mode but a 13h mode even if I don't use it
: anywhere!
: here's my constructor of cDesktop

: cDesktop::cDesktop(){
:  Menu.ChangeForm(0,0,799,19);
:  Icone.ChangeForm(0,20,799,39);
:  Opt.ChangeForm(0,40,99,599);
:  Image.ChangeForm(100,40,699,599);
:  Obj.ChangeForm(700,40,799,599);
: }

: void cItem::ChangeForm(uint xD,uint yD, uint xF, uint yF){
:  xDebut=xD;            /// Variable in my public class
:  yDebut=yD;
:  xFin=xF;
:  yFin=yF;
: }

: My constructor of cItem as nothing in it.



: This is only 1 example, but it happend often.
: thanks for help, Val



--
au revoir, alain
----
Aussi haut que l'on soit assis, on est toujours assis que sur son cul !!!