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What is the difference between new() and malloc()?

RS
Hi,

What is the difference between new() and malloc()?

RS
Jul 23 '05 #1
16 6790
RS wrote:
What is the difference between new() and malloc()?


'new' is the C++ way to create object in free store.
'mallow' is the C way to allocate some memory.
Jul 23 '05 #2
That's explained by lots of books. You can even google it.
Simply put, new is OOP, while malloc is not.

"RS" <rs@nospam.co m> дÈëÓʼþ news:76SOd.3582 25$Xk.263642@pd 7tw3no...
Hi,

What is the difference between new() and malloc()?

RS

Jul 23 '05 #3
Victor Bazarov wrote:
RS wrote:
What is the difference between new() and malloc()?


'new' is the C++ way to create object in free store.
'mallow' is the C way to allocate some memory.


You need to add malloc to your spell checker dictionary.
Jul 23 '05 #4
E. Robert Tisdale wrote:
Victor Bazarov wrote:
RS wrote:
What is the difference between new() and malloc()?

'new' is the C++ way to create object in free store.
'mallow' is the C way to allocate some memory.

You need to add malloc to your spell checker dictionary.


No, I need to work shorter days. So do you, apparently.
Jul 23 '05 #5
In article <37************ *@individual.ne t>,
MatrixV <tr******@kcoll ege.com> wrote:
That's explained by lots of books. You can even google it.
Simply put, new is OOP, while malloc is not.


That's odd; I use malloc for OOP quite regularly.

Mind you, I do OOP in C quite regularly (for assorted reasons, most
of them actually reasonable), and I never use malloc when I'm actually
writing C++ code, whether I'm doing OOP or not...
dave

--
Dave Vandervies dj******@csclub .uwaterloo.ca
My personal best estimate is that 90% of existing C code is crap (F various VO
crap), and 90% of existing NotC code is crap too. (I expect this to be true of
non-existing code as well.) --Dimitri Mazuik in the scary devil monastery
Jul 23 '05 #6
Dave Vandervies wrote:
[...] I never use malloc when I'm actually
writing C++ code, whether I'm doing OOP or not...


Really? Why? What's so bad about 'malloc'? It is
often _the_ function to call if you overload the
operator new...
Jul 23 '05 #7
In article <EO************ *******@newsrea d1.mlpsca01.us. to.verio.net>,
Victor Bazarov <v.********@com Acast.net> wrote:
Dave Vandervies wrote:
[...] I never use malloc when I'm actually
writing C++ code, whether I'm doing OOP or not...


Really? Why? What's so bad about 'malloc'? It is
often _the_ function to call if you overload the
operator new...


Usually, if I find myself wanting to overload the operator new, I soon
find myself deciding that the code is better written in C than in C++
anyways.

When I choose C++ over C, the reasons usually involve things like
letting the compiler handle resource management by running constructors
and destructors without me having to write the code to do it myself,
so using malloc instead of new kind of defeats the purpose.

(This probably has at least as much to do with the type of code I write
as with the characteristics of the two languages.)
dave

--
Dave Vandervies dj******@csclub .uwaterloo.ca
My personal best estimate is that 90% of existing C code is crap (F various VO
crap), and 90% of existing NotC code is crap too. (I expect this to be true of
non-existing code as well.) --Dimitri Mazuik in the scary devil monastery
Jul 23 '05 #8
"MatrixV" <tr******@kcoll ege.com> wrote in message news:<37******* ******@individu al.net>...
That's explained by lots of books. You can even google it.
Simply put, new is OOP, while malloc is not.

"RS" <rs@nospam.co m> дÈëÓʼþ news:76SOd.3582 25$Xk.263642@pd 7tw3no...
Hi,

What is the difference between new() and malloc()?

RS

Hi,
using malloc following things are not possible,
-- calling constructor after allocating memory(new calls
constructor as well)
-- Type safety: (new returns a pointer of the right type)
-- Overridability: (new is an operator that can be overridden)

Thanks,

Basavaraj Kirunge
Jul 23 '05 #9
You though you are doing quite well, but you are not. As Mr. Kirunge said,
malloc can't do many things, it just alloc a memory space. Of course you can
implement new by malloc, and in fact that's the way it goes.
I suggest you to google it instead of asking here. I read a lot on this and
it's hard to put them all here.

"Dave Vandervies" <dj******@csclu b.uwaterloo.ca> ????
news:cu******** **@rumours.uwat erloo.ca...
In article <37************ *@individual.ne t>,
MatrixV <tr******@kcoll ege.com> wrote:
That's explained by lots of books. You can even google it.
Simply put, new is OOP, while malloc is not.
That's odd; I use malloc for OOP quite regularly.

Mind you, I do OOP in C quite regularly (for assorted reasons, most
of them actually reasonable), and I never use malloc when I'm actually
writing C++ code, whether I'm doing OOP or not...
dave

--
Dave Vandervies

dj******@csclub .uwaterloo.ca My personal best estimate is that 90% of existing C code is crap (F various VO crap), and 90% of existing NotC code is crap too. (I expect this to be true of non-existing code as well.) --Dimitri Mazuik in the scary devil

monastery
Jul 23 '05 #10

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