faq new as parameter in the constructor

[fcvcnet]

Hi,

CarPtr g()
{
CarPtr p(new Car()); <-- How to explain this
// ...
return p;
}
Thanks.

 

[benben]

Hi,

CarPtr g()
{
CarPtr p(new Car()); <-- How to explain this

CarPtr is a class. The above statement constructs a CarPtr object named
p with a parameter that is a raw pointer to a dynamically allocated Car
object.

 

[Victor Bazarov]

Hi,

CarPtr g()
{
CarPtr p(new Car()); <-- How to explain this
// ...
return p;
}

What's there to explain? It's called "initialisation". You may
have seen it before. You can even do that with built-in types,
like a double:

double pi(3.1415926);

V

 

[fcvcnet]

Thanks.

 

[Rolf Magnus]

CarPtr is a class.

It is? How do you now that?

The above statement constructs a CarPtr object named p with a parameter
that is a raw pointer to a dynamically allocated Car object.

Yes. However, CarPtr could also be a typedef for Car*.