public static int CountVertices(BinTreeNode <int> r)
{
if (r == null)
{
return(0);
}
return(1 + CountVertices(r.GetLeft()) + CountVertices(r.GetRight()));
}
public static int SumValues(BinTreeNode <int> r)
{
if (r == null)
{
return(0);
}
return(r.GetValue() + SumValues(r.GetLeft()) + SumValues(r.GetRight()));
}
public static bool IsFullTree(BinTreeNode <int> r)
{
if (CountPartialVertices(r) == 0)
{
return(true);
}
return(false);
}
public static int CountPartialVertices(BinTreeNode <int> r)
{
if (r == null)
{
return(0);
}
if ((r.GetRight() != null && r.GetLeft() == null) || r.GetLeft() != null && r.GetRight() == null)
{
return(1 + CountPartialVertices(r.GetRight()) + CountPartialVertices(r.GetLeft()));
}
return(CountPartialVertices(r.GetRight()) + CountPartialVertices(r.GetLeft()));
}
static void Main(string[] args)
{
/*
* in order: H, E, A, J, I, C, B, D, G, F -> [H, E, A, J, I], [B, D, G, F] -> [H, E], [J, I], [G, F] ...
* post order: E, H, J, I, A, B, F, G, D, C
* Tree: C
* / \
* A D
* / \ / \
* H I B G
\ / \
\ E J F
*/
BinTreeNode <int> e = new BinTreeNode <int>(5);
BinTreeNode <int> d = new BinTreeNode <int>(10);
BinTreeNode <int> c = new BinTreeNode <int>(d, 1, e);
BinTreeNode <int> b = new BinTreeNode <int>(9);
BinTreeNode <int> a = new BinTreeNode <int>(b, 2, c); //root
Console.WriteLine("Page One:");
Console.WriteLine(IsInTree(a, 5));
Console.WriteLine(CountVertices(a));
Console.WriteLine(SumValues(a));
Console.WriteLine(CountLeaves(a));
Console.WriteLine(CountFullVertices(a));
Console.WriteLine(CountPartialVertices(a));
Console.WriteLine("Page Two:");
//DivideEvens(a); //Leaving it off for other tests.
Console.WriteLine(d.GetValue()); //example
//AddZeroToPartial(a);
//Console.WriteLine(c.GetLeft().GetValue()); //set c.Left = null and check
Console.WriteLine(CountEvenVertices(a)); //Note: after running DivideEvens this should be 0 - mark it as a comment for a different result.
Console.WriteLine(SumRightNodes(a));
try
{
Console.WriteLine(GetParent(a, 1).GetValue());
}
catch (NullReferenceException)
{
Console.WriteLine("No parent");
}
Console.WriteLine(IsAllEven(a));
Console.WriteLine("Page Three:");
Node <int> p = TurnToSortedList(null, a);
//TurnToSortedList(a, null);
while (p != null)
{
Console.WriteLine(p.GetValue());
p = p.GetNext();
}
}
public static int CountEvenVertices(BinTreeNode <int> r)
{
if (r == null)
{
return(0);
}
if (r.GetValue() % 2 == 0)
{
return(1 + CountEvenVertices(r.GetLeft()) + CountEvenVertices(r.GetRight()));
}
return(CountEvenVertices(r.GetLeft()) + CountEvenVertices(r.GetRight()));
}
public static int CountLeaves(BinTreeNode <int> r)
{
if (r == null)
{
return(0);
}
if (r.GetRight() == null && r.GetLeft() == null)
{
return(1);
}
return(CountLeaves(r.GetRight()) + CountLeaves(r.GetLeft()));
}
public static bool IsInTree(BinTreeNode <int> r, int v)
{
if (r == null)
{
return(false);
}
if (r.GetValue() == v)
{
return(true);
}
return(IsInTree(r.GetLeft(), v) || IsInTree(r.GetRight(), v));
}
public static bool IsAllEven(BinTreeNode <int> r)
{
if (r == null)
{
return(true);
}
if (r.GetValue() % 2 == 1)
{
return(false);
}
return(IsAllEven(r.GetRight()) && IsAllEven(r.GetLeft()));
}
public static void DivideEvens(BinTreeNode <int> r)
{
if (r == null)
{
return;
}
if (r.GetValue() % 2 == 0)
{
r.SetValue(r.GetValue() / 2);
}
DivideEvens(r.GetLeft());
DivideEvens(r.GetRight());
}
public static BinTreeNode <int> GetParent(BinTreeNode <int> r, int v)
{
if (r.GetLeft() == null && r.GetRight() == null)
{
return(null);
}
if (r.GetLeft().GetValue() == v || r.GetRight().GetValue() == v)
{
return(r);
}
GetParent(r.GetLeft(), v);
GetParent(r.GetRight(), v);
return(null);
}
public static void FindNode(BinTreeNode <int> r, ref Node <int> temp, ref Node <int> p)
{
while (temp != null)
{
if (temp.GetValue() > r.GetValue())
{
break;
}
else
{
p = temp;
temp = temp.GetNext();
}
}
}
public static void AddZeroToPartial(BinTreeNode <int> r)
{
if (r == null)
{
return;
}
if (r.GetLeft() != null && r.GetRight() == null)
{
r.SetRight(new BinTreeNode <int>(0));
AddZeroToPartial(r.GetLeft());
}
else if (r.GetLeft() == null && r.GetRight() != null)
{
r.SetLeft(new BinTreeNode <int>(0));
AddZeroToPartial(r.GetRight());
}
else
{
AddZeroToPartial(r.GetLeft());
AddZeroToPartial(r.GetRight());
}
}
public static Node <int> TurnToSortedList(Node <int> h, BinTreeNode <int> r)
{
if (r == null)
{
return(h);
}
h = TurnToSortedList(h, r.GetLeft());
Node <int> t = new Node <int>(r.GetValue());
Node <int> temp = h;
Node <int> p = null;
if (temp == null)
{
h = t;
}
else
{
FindNode(r, ref temp, ref p);
h = AttachNode(h, t, temp, p);
}
h = TurnToSortedList(h, r.GetRight());
return(h);
}
public BinTreeNode(T value)
{
this.value = value;
this.left = null;
this.right = null;
}
public void SetLeft(BinTreeNode <T> left)
{
this.left = left;
}
public void SetRight(BinTreeNode <T> right)
{
this.right = right;
}
public BinTreeNode(BinTreeNode <T> left, T value, BinTreeNode <T> right)
{
this.value = value;
this.left = left;
this.right = right;
}