Re: Pointers, auto-pointers, etc.
robean wrote:
I am trying to get together a bunch of code-samples for interviews,
and have been advised to keep them short (300 - 500 lines, approx.).
Can anyone suggest such a short project that explicitly uses
pointers? Obviously, with the vast offerings of the Standard
Libraries, one ends up using pointers *under the hood*, but I'm
looking for something that would require a fair bit of explicit low-
level manipulation. Any ideas?
This example code is using a virtual function to polymorphically invoke the
copy-constructor. This can be used to copy an object while only having a
pointer or reference to the base instead of the complete type.
struct base
{
virtual ~base() {}
virtual base* clone() const = 0;
};
struct derived1: base
{
virtual derived1* clone() const
{ return new derived1(*this); }
};
struct derived2: base
{
virtual derived2* clone() const
{ return new derived2(*this); }
};
Give them this sample code and ask them to improve it using std::auto_ptr.
Actually, there are lots of ways this code can be improved, and some will
be easy when touching the code anyway.
Solutions in the next days, unless anyone else wants to jump in. ;)
Uli
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