Given a binary tree, print all root-to-leaf paths

Question

Anonymous · Accepted Answer

I said dfs, I used recursive programming. But I just could not make the code working, and I could not understand where to push/ pop the data from the stack in my implementation.

Anonymous · Answer

It's similar to DFS!

public void printAllPaths(Node node, int[] path, int len) {

    if (node == null)
        return;

    path[len] = node.mData;
    len++;

    if (node.mLeftNode == null && node.mRightNode == null) {
        for (int i = 0; i < len; i++) {
            System.out.print(path[i] + " ");
        }
        return;
    }
    printAllPaths(node.mLeftNode, path, len);
    System.out.println();
    printAllPaths(node.mRightNode, path, len);
}

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