CSharp Algorithm

/*

Author: Jiangong SUN

*/

Here I will introduce the breadth first traversal of binary tree.

The principe is that you traverse the binary tree level by level. 

This traversal is quite different than depth first traversal. In depth first traversal you can use recursive method to traverse.

Here is one solution using a queue.

        /// <summary>
        /// breadth-first traversal 宽度遍历树
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="node"></param>
        public void Traversal<T>(Node<T> node)
        {
            //create a Node<T> queue
            var treeQueue = new Queue<Node<T>>();
            //initialize queue with tree root node
            treeQueue.Enqueue(node);

            //if queue has elements
            while (treeQueue.Count > 0)
            {
                //dequeue the queue's first node 
                Node<T> current = treeQueue.Dequeue();

                //print the node name
                PrintNodeName(current);
                
                //if node has Left leaf, enqueue it
                if (current.LNode != null)
                    treeQueue.Enqueue(current.LNode);
                
                //if node has right leaf, enqueue it
                if (current.RNode != null)
                    treeQueue.Enqueue(current.RNode);
            }
        }

references;

http://www.cs.bu.edu/teaching/c/tree/breadth-first/

http://hectorea.com/blog/programming-interview-31-binarytree-traversal-by-levels-breadth-first/#