gistfile1.cpp

#include <iostream >

using namespace std;

struct Node
{
  Node() { next = 0; }
	
	virtual void PrintValue() = 0;

	Node *next; 
};

struct IntNode : public Node
{
	IntNode(int value) : intValue(value) {}

	virtual void PrintValue() { cout << intValue << endl; }

	int intValue;
};

struct FloatNode : public Node
{
	FloatNode(float value) : floatValue(value) {}

	virtual void PrintValue() { cout << floatValue << endl; }

	float floatValue;
};


class List
{
public:
	List() 
	{ 
		current = first = 0;
	}

	void Add(Node *node)
	{
		if (!first)
		{
			first = node;
			current = node;
		}
		else 
		{
			current->next = node;
			current = node;
		}
	}

	void PrintAllNodes()
	{
		Node *node = first;

		while (node)
		{
			node->PrintValue();
			node = node->next;
		}
	}

private:
	Node *current, *first;
};

int main()
{
	List list;

	list.Add(new IntNode(42));
	list.Add(new IntNode(665));
	list.Add(new IntNode(666));
	list.Add(new FloatNode(3.1415f));

	list.PrintAllNodes();

	return 0;
}