改变“位置”和改变“内容” (1)do the following N-1 times: 1.1)X←-1： (1.2)while X N do the following: (1.2.1)if V[X +1]<V[X]then exchange them: (1.2.2)X←X+1. How to exchange them?改变“位置”和改变“内容” How to exchange them?