Newbie: Templates complication

[Rach]

Hi,

Is it possible for me to create a class Node that has a pointer to a class
Node. i.e.:

template <class T> class Node {
public:
Node (T t, int n) { ptrChild = t; nValue = n; };
private:
T* ptrChild;
int nValue;
};

How do I instantiate such class?

thanks much,
Rach

 

[Karl Heinz Buchegger]

Hi,

Is it possible for me to create a class Node that has a pointer to a class
Node. i.e.:
Sure


template <class T> class Node {
public:
Node (T t, int n) { ptrChild = t; nValue = n; };

From the way you use 't', I think it must be
Node (T* t, int n) { ptrChild = t; nValue = n; };

private:
T* ptrChild;
int nValue;
};

How do I instantiate such class?

eg.
struct Test
{
int a, b;
};

Test StructA;
Node<Test> NodeA( &StructA, 3 );

 

[John Harrison]

Hi,

Is it possible for me to create a class Node that has a pointer to a class
Node. i.e.:

template <class T> class Node {
public:
Node (T t, int n) { ptrChild = t; nValue = n; };
private:
T* ptrChild;
int nValue;
};

I think perhaps you mean this

template <class T> class Node {
public:
Node (Node<T>* t, T n) { ptrChild = t; nValue = n; };
private:
Node<T>* ptrChild;
T nValue;
};

How do I instantiate such class?

Same as any other class. Classes containing pointers to their own type
aren't a problem in C++, even when they are templates.

thanks much,
Rach

john

 

[Rach]

template <class T> class Node {
public:
Node (Node<T>* t, T n) { ptrChild = t; nValue = n; };
private:
Node<T>* ptrChild;
T nValue;
};

How do I instantiate this class? Node trial = Node<Node<Node>>; doesn't
work.

Thanks much,
Rach

 

[Karl Heinz Buchegger]

template <class T> class Node {
public:
Node (Node<T>* t, T n) { ptrChild = t; nValue = n; };
private:
Node<T>* ptrChild;
T nValue;
};

How do I instantiate this class? Node trial = Node<Node<Node>>; doesn't
work.

Node<int> trialA( NULL, 2 );
Node<int> trialB( trialA, 3 );

 

[John Harrison]

template <class T> class Node {
public:
Node (Node<T>* t, T n) { ptrChild = t; nValue = n; };
private:
Node<T>* ptrChild;
T nValue;
};

How do I instantiate this class? Node trial = Node<Node<Node>>; doesn't
work.

Thanks much,
Rach

I think you are confused, T is the type of data that each node holds, it has
nothing to do with the fact that each node points to another node.

Node<int> trial(NULL, 123);

john

 

[John Harrison]

Node<int> trialA( NULL, 2 );
Node<int> trialB( trialA, 3 );

Node<int> trialB( &trialA, 3 );

john

 

[Karl Heinz Buchegger]

Node<int> trialB( &trialA, 3 );

I swear, the & was there, when I sent the post.
At least I could see it.