private void txtSubsetSize_TextChanged(object sender, System.EventArgs e)
{
long n = int.Parse(txtTotalItems.Text);
long k = int.Parse(txtSubsetSize.Text);
txtNumCombinations.Text = Combination.Choose(n, k).ToString();
}
static void Main()
{
long n = 4;
long k = 2;
Console.WriteLine("With n = " + n + ", and k = " + k);
Console.WriteLine("There are " + Combination.Choose(n, k) + " combinations\n");
Combination c = new Combination(n, k);
Console.WriteLine("The mathematical combinations are:");
while (c != null)
{
Console.WriteLine(c.ToString());
c = c.Successor();
}
Console.ReadLine();
} // Main()