i know how to insert, print binary tree but how to print it like this? note that leafs and nodes will change and dont have to be same as this.

Code:
ex:

    6
   / \
 1    7
 /    / \
0    5   8


this is what i have, but this prints 6,1,0,7,8. i want to add space and slashs.
Code:
public void PreOrderTraversal(node root_node) {

		if (root_node == null) {
			 System.out.println("Binary Tree is empty!");
		} else {
			System.out.println(root_node.name + " " + root_node.age);
			PreOrderTraversal(root_node.left_child);
			PreOrderTraversal(root_node.right_child);
		}
	}