【加试题】小李基于冒泡排序算法编写了一个VB程序,功能如下:在文本框Text1中显示排序前的数据,单击“排序”按钮Command1,在文本框Text2中显示剔除重复数据后的升序排序结果。程序运行界面如下图所示。
实现上述功能的VB程序如下,但加框处代码有错,请改正。 Const n = 10 Dim a(1 To n) As Integer Private Sub Command1_Click() Dim i As Integer, j As Integer, t As Integer, bottom As Integer '获取排序前数据依次存储在数组a 中,并在文本框Text1 中显示。代码略 bottom = n : i = 1 Do While i <= bottom - 1 For j = bottom To i + 1 Step -1 If Then ‘⑴ t = a(j): a(j) = a(j - 1): a(j - 1) = t ElseIf a(j) = a(j - 1) Then ' 相邻两个数据相等,进行剔除处理 ‘⑵ bottom = bottom - 1 End If Next j i = i + 1 Loop Text2.Text = " " For i = 1 To bottom Text2.Text = Text2.Text + Str(a(i)) Next i End Sub ⑴ ⑵
答案:【1】a(j)<a(j-1)【2】a(j)=a(buttom)