如圖為冒泡排序的案例:lstUnsorted,lstSorted為左右兩個列表框. Option Explicit Const MAXSIZE=1000 Dim d(MAXSIZE+1)As Integer,n As Integer Private Sub Command1_Click ( ?。?br />Dim i As Integer,j As Integer n=Val(txtSize.Text) If n<=0Or n>MAXSIZE Then txtSize=“數據個數必須大于0!“ Exit Sub End If Randomize lstUnsorted.Clear For i=1To n j=Int(32768*Rnd) lstUnsorted.AddItem Str$(j) d(i)=j Next Command2.Enabled=True End Sub Private Sub Command2_Click ( ?。?冒泡 Dim i,j,TEMP,NextElement lstSorted.Clear For i=1to n-1 For ①Step-1 If d(j)<d(j-1)Then TEMP=d(j) ② d(j-1)=TEMP End If Next Next For i=1To n lstSorted.AddItem d(i) Next End Sub 問:為了實現上述冒泡算法的實現,橫線處應填入 ①