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From: Lotko Mariusz <lotko AT alice DOT ci DOT pwr DOT wroc DOT pl>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: new/malloc and delete/free
Date: 13 Mar 2002 16:53:10 GMT
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Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de> wrote:
> Sahab Yazdani <sahaby AT vif DOT com> wrote:
> > okay i've been using both c/c++ for a while, but this question just 
> > occured to me now,  what exactly is the difference between new and 
> > malloc and delete and free.

> In a very small nutshell: new/delete is just malloc/free with a shiny
> C++ coat wrapped around it.
> -- 
> Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
> Even if all the snow were burnt, ashes would remain.


I'm afraid it's not true. new/delete call constructor/destructor while
malloc/free don't.

You can't mix new with free or malloc with delete.

To state a point:

class A
{
public:
	A()
	{
		string = "This won't be created by free()";
	}
	~A()
	{
		string = 0;
	}

protected:
	char* string;
};

So now:
	A*	ptr = new A();

is quite different from:
	A*	ptr = malloc( sizeof(A) );	// I'm not sure if such
						// strange thing works.


-- 
--
Mariusz Lotko
http://www.lotko.magma-net.pl/