VB程序设计例题-程序改错程序填空程序设计

'以下程序段用于输出杨辉三角:结果样式如图1

'

Private Sub Form_Click()

Const n = 10

Dim arr(n, n) As Integer

For I = 1 To n

arr(I, I) = 1

'**********SPACE**********

【arr(I, 1) = 1】

Next I

For I = 3 To n

For j = 2 To I - 1

'**********SPACE**********

arr(i, j) =arr(i-1,j-1)+arr(i-1,j)

Next j

Next I

For I = 1 To n

For j = 1 To I

'**********SPACE**********

【print arr(I,j)】

Next j

Print

Next I

End Sub

Option Explicit

'------------------------------------------------

'【程序改错】

'------------------------------------------------

'题目：用自定义函数的方法求sum（x），求当-1≤x≤1时，' sum（x）=x/2！+x^2/3!+x^3/4!+……+x^n/(n+1)!，

' 当x〉1或x〈-1时，函数值为0。当n〈=0时，输入数' 据错误。X、N都是由用户输入。

'------------------------------------------------

'注意：不可增加或删除程序行，也不可以更改程序结构

'------------------------------------------------

Private Sub Command1_Click()

Dim s As Single

Dim n As Integer, x As Single, k As Integer

n = Val(InputBox("Please input a integer value:"))

x = Val(InputBox("Please input a single value:"))

If n <= 0 Then

k = MsgBox("数据输入错误！", vbRetryCancel + vbExclamation, "数据输入")

Exit Sub

End If

s = Sum(x, n)

Print s

End Sub

Function Sum(x As Single, n As Integer)

Dim i As Integer, ss As Long

ss = 1

Sum = 0

If x > 1 Or x < -1 Then

'**********FOUND**********

Exit Do 改为Exit Function

Else

'**********FOUND**********

For i = 2 To n 改为For i = 2 To n+1

ss = ss * i

'**********FOUND**********

Sum = x ^ (i - 1) / ss 改为Sum =sum+ x ^ (i - 1) / ss

Next i

End If

End Function

Option Explicit

'------------------------------------------------

'【程序改错】

'------------------------------------------------

'题目:编程将一个数从已经有序（设从小到大排序）的数组

' 中删除，使数组还继续保持有序而且其余元素按照下

' 标连续存放。

'------------------------------------------------

'注意：不可增加或删除程序行，也不可以更改程序结构

'------------------------------------------------

Private Sub Form_Click()

Dim A() As Integer, N As Integer, Flag As Integer

Dim i As Integer, X As Integer, P As Integer

Flag = 0

N = InputBox("输入元素个数")

'**********FOUND**********

Dim A(N) 改为ReDim A(N)

For i = 1 To N

A(i) = InputBox("输入数组的第" & i & "个元素") Next i

Print "删除某元素前的数组"

For i = 1 To N

Print A(i);

Next i

Start:

X = InputBox("输入要删除的元素：")

For i = 1 To N

If X = A(i) Then P = i: Flag = 1

Next i

If Flag = 0 Then MsgBox ("没有此元素"): GoTo Start

For i = P To N - 1

'**********FOUND**********

A(i + 1) = A(i) 改为A(i) = A(i+1)

Next i

'**********FOUND**********

N = N + 1 改为N = N- 1

Print "删除元素后的数组:"