"Program has stopped working"

[mmiinneess11]

So I'm trying to run some example functions that were given to me. The build succeeds in VS2010, but when I run the program, it crashes after a value is entered. I've tested it on two machines and the same thing happens. Here's the code:

#include <iostream>

using namespace std;


struct node
{
	int item;
	node *next;
	node *headptr;
};


bool insert (node *&headptr, int val);
void printlist(node *headptr);
int count(node *headptr);

int main()
{
	do
	{
	int val;
	node *headptr;
	cout << "please enter value to be added to our list: ";
	cin >> val;
	insert (headptr, val);
	printlist (headptr);
	}while(1==1);
}




bool insert (node *&headptr, int val)
{
	node *prev;
	node *temp;
	node *curr;
	temp = new(nothrow) node;
	if (temp == NULL)
		return false;
	temp->item = val;
	temp->next = NULL;
	//empty check:
	if (headptr == NULL)
	{
		headptr = temp;
		return true;
	}
	if (temp->item <= headptr->item)
	{
		temp->next = headptr;
		headptr = temp;
		return true;
	}
	prev = headptr;
	curr = headptr;
	while(curr != NULL && curr->item <= temp->item)
	{
		prev=curr;
		curr=curr->next;
	}
	prev->next = temp;
	temp->next = curr;
	return true;
}


void printlist(node *headptr)
{
	node *temp=NULL;
	temp=headptr;
	while(temp!=NULL)
	{
		cout << temp->item;
		temp = temp->next;
	}
}

int count(node *headptr)
{
	int count = 0;
	node *temp=NULL;
	temp=headptr;
	while(temp!=NULL)
	{
		temp = temp->next;
		count++;
	}
	return count;
}

[DSLq5Di1]

headptr is uninitialized and could point to anything.

	node *headptr = NULL;

	do
	{
		int val;
		node *headptr;
		...