BST traversal (#17)

* BST treversal

Creates a tree of given values and gives inorder, preorder and postorder of a tree.

* Make BST and its travesals

* Delete TreeTravesal.py

Author: Kshitiz-Jain

Trees/TreeTravesal.py

@@ -0,0 +1,59 @@
+
+
+class Node(object):
+	"""docstring for Node"""
+	def __init__(self, val):
+		self.key = val
+		self.left=None
+		self.right=None
+
+
+class Tree:
+	"""docstring for Tree"""
+	def __init__(self,val):
+		self.root = Node(val)
+		
+	def insertNode(root,val):
+		if(root==None):
+			root=Node(val)
+		elif(root.key<val):
+			root.right=Tree.insertNode(root.right,val)
+		else:
+			root.left=Tree.insertNode(root.left,val)
+		return root
+
+	def inorder(root):
+		if(root==None):
+			return ""
+		else:
+			return str(Tree.inorder(root.left)) +" "+ str(root.key) +" "+ str(Tree.inorder(root.right))
+
+
+	def preorder(root):
+		if(root==None):
+			return ""
+		else:
+			return str(root.key) +" "+ str(Tree.preorder(root.left)) +" "+ str(Tree.preorder(root.right))
+
+
+	def postorder(root):
+		if(root==None):
+			return ""
+		else:
+			return str(Tree.postorder(root.left)) +" "+ str(Tree.postorder(root.right)) +" "+ str(root.key)
+
+
+
+
+array=[1,22,3,44,32,35]
+treeRoot=Node(array[0])
+for i in range(1,len(array)):
+	treeRoot=Tree.insertNode(treeRoot,array[i])
+
+print("Inorder:", Tree.inorder(treeRoot))
+print("Preorder:", Tree.preorder(treeRoot))
+print("Postorder:", Tree.postorder(treeRoot))
+
+
+
+