> > cost ship * p;

is this cost actually const?

You can read from but not write to a const location.
const meens constant, unchanging. Declaring a const
pointer meens that it points to something which must
not be changed.

> > p=&ship1;
> > (*p).temperature=123;
> > the error message is same.
>
> p->temperature
>
> >
> > Why???

Regards
Sergio

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