usage of [] operator with pointers

[Pavan]

Hi,
My application requires usage of overloaded operator [] using
pointer
My application is like this

vector<int> * ptr;

Now I should access elements of the vector using vector pointer but
the below code is giving compilation error:

for(unsigned int i=0; i < ptr->size(); i++)
{
cout << ptr-> << endl; // I know that while calling as a member
we dont use dot operator before [] like how I am using -> here, so is
it not possible to access elements using [] with pointer at all? Is
there any alternative
}

 

[gob00st]

Hi,
    My application requires usage of overloaded operator [] using
pointer
My application is like this

vector<int> * ptr;

Now I should access elements of the vector using vector pointer but
the below code is giving compilation error:

for(unsigned int i=0; i < ptr->size(); i++)
{
   cout << ptr-> << endl; // I know that while calling as a member
we dont use dot operator before [] like how I am using -> here, so is
it not possible to access elements using [] with pointer at all? Is
there any alternative

}

Try
cout << (*ptr) << endl;

Gob00st

 

[peter koch]

Hi,
    My application requires usage of overloaded operator [] using
pointer
My application is like this

vector<int> * ptr;

Why not vector<int> vec;

Your construct looks as if you've had the Java-disease. Don't allocate
dynamically in C++ unless you have good reason.


/Peter
(as told elsethread, the solution to your problem would be to use *ptr
instead of ptr->)