can any body change this simple code to java for me? : (

Question

5.00/5 (1 vote)

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here is code i need it for my project
but i am not familiar with c++
can any body change it to java plz?:(

C++

void iterativePostOrder(Node* root) {
        if (!root) {
                return;
        }
        stack<node*> nodeStack;
 
        Node* cur = root;
        while (true) {
                if (cur) {
                        if (cur->right) {
                                nodeStack.push(cur->right);
                        }
                        nodeStack.push(cur);
                        cur = cur->left;
                        continue;
                }
 
                if (nodeStack.empty()) {
                        return;
                }
 
                cur = nodeStack.top(); 
                nodeStack.pop();
 
                if (cur->right && !nodeStack.empty() && cur->right == nodeStack.top()) {
                        nodeStack.pop();
                        nodeStack.push(cur);
                        cur = cur->right;
                } else {
                        std::cout << cur->val << " ";
                        cur = NULL;
                }
        }
}

Posted 4-Dec-11 11:15am

DominoBoy

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2 solutions

Solution 2

How do you know it's useful when you can't even read it?

the Node* is a pointer. You can treat it here in the same way you would treat an interface.

You also might want to read this:
Tutorial on XML @ oracle.com[^]
samples on XML-API @oracle.com

Posted 4-Dec-11 19:15pm

TorstenH.

Comments

DominoBoy 5-Dec-11 3:21am

its from wikipedia so its usefull ;)

TorstenH. 8-Dec-11 1:48am

The web is lying.

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Nikil S · Accepted Answer · 2011-12-04T11:35:00

private void iterativePostOrder(Node root)
{
		if (root == null)
		{
				return;
		}
		java.util.Stack<node> nodeStack = new java.util.Stack<node>();

		Node cur = root;
		while (true)
		{
				if (cur != null)
				{
						if (cur.right)
						{
								nodeStack.push(cur.right);
						}
						nodeStack.push(cur);
						cur = cur.left;
						continue;
				}

				if (nodeStack.empty())
				{
						return;
				}

				cur = nodeStack.peek();
				nodeStack.pop();

				if (cur.right && !nodeStack.empty() && cur.right == nodeStack.peek())
				{
						nodeStack.pop();
						nodeStack.push(cur);
						cur = cur.right;
				}
				else
				{
						System.out.print(cur.val);
						System.out.print(" ");
						cur = null;
				}
		}
}</node></node>

Used this demo Converter[^]