Answer Posted / ds

Use a queue to achieve this.
1. push root to queue
2. if root!=NULL, pop root and print data.
3. visit left child and right child of root and push them to
queue
4. pop leftchild from queue , print data, push left and
right child.
5. pop rightchild from queue, print data, push left and
right child.
6. carry on till queue is empty.

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