[Cpp-Programming] Re: doubt in c++

On Thu, Jul 30, 2009 at 9:51 PM, cooldude<srivatsak.s@gmail.com> wrote:
>
> hi,
>
> i'm pretty new to c++. i have got a simple doubt. please answer.
>
> i have a class called square.
>
> class square
> {
            void sum();

> //some implementation here
> }
>
> now when i write the main program i create the object. here is where
> i'm confused. i feel i can create the object square in two ways. let
> me know if i'm correct.
>
> square obj_sqr1; // this is one way
>
> square* ptr_square;
> ptr_square = new square ; //  using the new operator, forgive me if
> the syntax is wrong
>
> what is the difference between the two ? are they same ? ..

ans: their internal representation in the memory is same
but when we code thier syntax is very different.
say e.g when calling a member function
square obj;
square *ptrobj;
ptrobj=new square();

obj.sum();
ptrobj->obj();


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