For i = 1 to 9 For j = 1 to i Debug.Print j & " * " & i & " = " & i*j & " "; Next j Debug.PrintNext i排列方式使用阶梯式排列
时间: 2024-03-11 13:51:18 浏览: 15
以下是 VB 代码使用阶梯式排列方式实现九九乘法表:
```vb
Sub LadderMultiplicationTable()
Dim arr(8) As Integer
For i = 0 To 8
arr(i) = i + 1
Next i
Do
For i = 0 To 8
For j = 0 To i
Debug.Print arr(j) & " * " & arr(i) & " = " & arr(i) * arr(j) & " ";
Next j
Debug.Print
Next i
Debug.Print "-----------------------"
LadderPermutation arr
Loop Until arr(0) = 9
End Sub
Private Sub LadderPermutation(ByVal arr() As Integer)
Dim n As Integer = arr.Length
Dim i As Integer = n - 2
While i >= 0 AndAlso arr(i) >= arr(i + 1)
i -= 1
End While
If i >= 0 Then
Dim j As Integer = n - 1
While j >= 0 AndAlso arr(j) <= arr(i)
j -= 1
End While
Swap arr, i, j
End If
Reverse arr, i + 1, n - 1
End Sub
Private Sub Swap(ByVal arr() As Integer, ByVal i As Integer, ByVal j As Integer)
Dim temp As Integer = arr(i)
arr(i) = arr(j)
arr(j) = temp
End Sub
Private Sub Reverse(ByVal arr() As Integer, ByVal start As Integer, ByVal [end] As Integer)
While start < [end]
Swap arr, start, [end]
start += 1
[end] -= 1
End While
End Sub
```
以上代码中,我们首先定义一个整数数组 `arr`,该数组的元素为 1 到 9 的整数。然后在一个循环中,不断使用阶梯式排列方式对数组进行排列,并输出当前排列下的九九乘法表。当数组的第一个元素为 9 时,退出循环。在排列过程中,我们使用了 `LadderPermutation`、`Swap` 和 `Reverse` 三个函数,这些函数的实现方式和上一个问题的答案中的函数相同,这里不再赘述。