FW: [CST-2] Address taken variable

[Tom Puverle]

> An address taken variable is one whose address has been 'taken' by the
> program (funnily enough!)
> 
> E.g. in C 
> 
>    a = &b;
> 
> we set a (usually a pointer) to the address of b :- b is address taken.

Sorry I misinterpreted your last post. 

Anyway, it has to be said that in C++ this syntax doesn't always imply
the taking of the address of b, nor does it always imply an assignment to 
a pointer variable a.
As an example consider what happens if b is a variable of a class with 
an overloaded operator&()

	class SomeType
	{
		...
		public:
			int operator&()
			{
				hdd_->format();
				return 0;
			}
		private:
			BootHDD * hdd_;
			...
	
	};

	void foobar()
	{
		SomeType b;
		int a = &b;		//doesn't quite do what you expect... :)
	}

There is also the other possibility of a not being a pointer type
but a class with an overloaded operator=()


	class SomeOtherType
	{
		...
		public:
			SomeOtherType & operator=(int * rhs )
			{
				//do whatever		
			}
		...
	}

Then

	void barfoo()
	{
		SomeType a;
		int b;
		a = &b;	
	}

again doesn't do exactly what you expect.
However, I don't expect them to ask you this in the exam.
Tom