Can't get object values to print

[misterspock1]

I am trying to go through a .csv file of numbers and create a singly-linked list using object values as pointers. The code is free of syntax errors and it compiles correctly, but when I go into the debug screen in Visual Studio it just says "Press a character to exit." It doesn't print any output, even though I have a clear print function called in my code. I don't know if it is something simple I am overlooking or what.

Here is my code:

class Node
{
public:
	int value;
	int next;
	Node(int number, int next)
		:value(value), next(next){}
};

Node Comparisons(int number, vector<int> StackTop, Node last_node, vector<Node> node_list)
{
	bool new_stack = true;
	for (int i = 0; i < StackTop.size(); i++)
	{   
		if (number < StackTop[i])
		{
			StackTop[i] = number;
			if(i == 0)
			{
				Node n1 = Node(number, 0);
				node_list.push_back(n1);
			}
			else 
			{
				Node n1 = Node(number, StackTop[i-1]);
				node_list.push_back(n1);
			}
			i = StackTop.size();
			new_stack = false;
		}
		if (new_stack)
		{
			StackTop.push_back(number);
			Node last_node = Node(number, StackTop[i-1]);
			node_list.push_back(last_node);
		}
	}
	return last_node;
}

void PrintSequence (Node last_node, vector<Node> node_list)
{
	cout<<last_node.value<<" ";
	Node current_node = last_node;
	while (current_node.next != 0)
	{
		for (int i = 0; i < node_list.size(); i++)
		{
			if (node_list[i].value == current_node.next)
			{
				cout<<node_list[i].value<<" ";
				current_node = node_list[i];
				i += node_list.size() - i;
			}
		}
	}
}

void main()
{
	ifstream fin("RandomUpSeq.dat");

	if (!fin)
	{
		cout<<"Could not open input file.\n";
	}

	keep_window_open();
	string number;
	string data;
	getline(fin, data);
	stringstream string(data);
	vector<int> StackTop;
	Node last_node = Node(0,0);
	vector<Node> node_list;
	while(getline(string, number, ','))
	{
		int input = atoi(number.c_str());
		last_node = Comparisons(input, StackTop, last_node, node_list);
	}
	fin.close();
	PrintSequence(last_node, node_list);
}

I thank you for any help you can provide. This is a project for class and I am trying to work out the bugs before I turn it in.