1Pre-order 定義與應用(Figure 1)
考點:三種走訪順序的定義與追蹤方法
Algorithm preOrder(v):
if v = null then return
print(v.element)
preOrder(v.left)
preOrder(v.right)
輸出:Computers"R"Us, Sales, US, International, Asia, Canada, Manufacturing, Laptops, Desktops
