Driver Code
root = TreeNode ( 341 ) NEW_LINE root . left = TreeNode ( 241 ) NEW_LINE root . right = TreeNode ( 123 ) NEW_LINE root . left . left = TreeNode ( 324 ) NEW_LINE root . left . right = TreeNode ( 235 ) NEW_LINE root . right . right = TreeNode ( 161 ) NEW_LINE makeInc ( root ) NEW_LINE