VB程序改错40题含答案.docx

1、VB程序改错40题含答案【程序改错】题目：该程序实现将输入的 0 - 255 之间的正整数转换成二进制数Option ExplicitPrivate Sub Form_Click() Const n = 8 Dim a(n) As Integer, s As String, m As Integer, x As Integer x = Val(InputBox(请输入一个 0 - 255 之间的正整数：) Print x For m = 1 To n a(m) = x Mod 2 x = x / 2 Next m s = For m = n To 0 Step -1 s = Str(a(m)

2、Next m Print s End Sub答案：=(答案1)=For m = 0 To n=(答案2)=x= x 2=或=x= int(x/2)=(答案3)=s = s + Str(a(m)第3题 （1.0分） 题号:463【程序改错】题目：以下程序功能是输入三个数，由大到小排序。Option ExplicitDim A As IntegerDim B As IntegerDim C As IntegerPrivate Sub Form_Click() Dim nTemp As Integer A = Val(InputBox(Please input first integer, 输入正整

3、数) B = Val(InputBox(Please input second integer, 输入正整数) C = Val(InputBox(Please input third integer, 输入正整数) If A = C Then nTemp = A A = B B = nTemp End If If B = C Then nTemp = A A = C C = nTemp End If If A = B Then nTemp = B B = C C = nTemp End If Print The integers in order is; A; B; CEnd Sub答案：=(

4、答案1)=If A = A Then=(答案2)=If A = A Then=(答案3)=If B = B Then第4题 （1.0分） 题号:127【程序改错】题目：下面程序可输出如下图形： * * * * *-Option ExplicitPrivate Sub Form_Click()Dim m As Integer, n As Integer, s As String, i As Integer, j As Integern = 4m = 1s = *For i = 5 To 1 Step -1 Print Spc(n) For j = 1 To 2 * m - 1 Print s;

5、Next j Print n = n + 1 m = m - 1Next iEnd Sub答案：=(答案1)=Print Spc(n);=或=Print Spc(i);=或= Spc(n);=或= Spc(i);=(答案2)=n = n - 1=或=n = - 1+n=(答案3)=m = m + 1第5题 （1.0分） 题号:469【程序改错】题目：已知一个函数f(x)=1000*sin(x)，利用绘图方法 在图片框中显示其图形。结果如图1Option ExplicitPrivate Const pi = 3.14159Private Sub Command1_Click() Dim x As

6、 Integer Picture1.Scale (-pi, -1200)-(pi, 1200) For x = -pi To pi Step pi Picture1.PSet (x, 1000 * pi * Sin(x), vbRed Next xEnd Sub答案：=(答案1)=Dim x As Single=或=Dim x!=(答案2)=For x = -pi To pi Step pi / 180=(答案3)=Picture1.PSet (x, 1000 * Sin(x), vbRed=或=Picture1.PSet (x, Sin(x)*1000), vbRed第6题 （1.0分） 题

7、号:497【程序改错】题目:编程求一个十进制整数n的各位数字之和，设n为小于或等于5位的数。Option ExplicitPrivate Sub Form_Click() Dim N As Integer, Sum As Integer, S1 As String, S2 As String Dim i As Integer, Ch As String Sum = 0 N = InputBox(输入整数n) S1 = Str(N) S1 = RTrim(S1) For i = 1 To Len(S1) Ch = Mid(N, i, 1) Sum = Val(Ch) Next i Print 该

8、整数的各位数之和是：; SumEnd Sub答案：=(答案1)=S1 = Trim(S1)=或=S1 = lTrim(S1)=(答案2)=Ch = Mid(S1, i, 1)=(答案3)=Sum = Sum + Val(Ch)=或=Sum = Sum + Val(Ch)第7题 （1.0分） 题号:454【程序改错】题目：本程序的功能是随机产生的10个两位正整数，并进行递减排序。Option ExplicitPrivate Sub CreateRND() Dim Temp As Integer Dim I As Integer Dim N As Integer Dim X(10) As Inte

9、ger Dim J As Integer N = 10 Print 数据： For I = 1 To N X(I) = Int(Rnd() * 90) Print X(I); Next I Print Print 排序： For I = 0 To N - 1 For J = I + 1 To N If X(I) X(J) Then Temp = X(I) X(J) = X(I) X(I) = Temp End If Next J Print X(I); Next I PrintEnd SubPrivate Sub Command1_Click() CreateRNDEnd Sub答案：=(答案

10、1)=X(I) = Int(10 + Rnd() * 90)=或=X(I) = Int(10 + Rnd() * 90)=(答案2)=If X(I) X(J) Then=或=If X(I) X(I) Then=或=If X(J) = X(I) Then=(答案3)=temp = X(J)第9题 （1.0分） 题号:130【程序改错】题目：以下程序段用于计算5的N次方。Option ExplicitPrivate Sub Form_Click() Dim n As Integer, k As Integer, s As Long n = InputBox( Input n ) k = 0 s =

11、 0 Do While k = n s = s * 5 k = k + 1 Next Print 5的; n次方是; sEnd Sub答案：=(答案1)=k=1=(答案2)=s=1=(答案3)=Loop第11题 （1.0分） 题号:452【程序改错】题目：用自定义函数的方法求sum（x），求当-1x1时， sum（x）=x/2！+x2/3!+x3/4!+xn/(n+1)!， 当x1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。Option ExplicitPrivate Sub Command1_Click() Dim s As Single Dim n As In

12、teger, x As Single, k As Integer n = Val(InputBox(Please input a integer value:) x = Val(InputBox(Please input a single value:) If n 1 Or x 0 Then pjf = pjf / 30 Debug.Print 不及格 + Str$(bjg) + 人，及格 + Str$(jg) + 人，中等 + Str$(zd) + 人; Debug.Print 良好 + Str$(lh) + 优秀 + Str$(yx) + 人 Debug.Print 优秀分数段成绩平均分

13、& pjfEnd Sub答案：=(答案1)=a = Int( Rnd() * 100)=或=a = Int( Rnd * 100)=(答案2)=pjf = pjf + a=(答案3)=If yx 0 Then pjf = pjf / yx第17题 （1.0分） 题号:456【程序改错】题目：挑选单数并排序程序：程序启动后由计算机自动产 生20个属于100，300之间的随机整数，单击显 示全体按钮时，在Form1上显示这20个随机数； 单击显示奇数按钮时，在Form1上显示其中的奇数； 单击排序按钮时，在Form1上将这些奇数从小到大显示。 要求显示格式为每行显示5个数据。Option Expl

14、icitPrivate a(20) As Integer, b(20) As IntegerPrivate k As IntegerPrivate Sub cmdodd_Click()Dim I As Integerk = 0For I = 1 To 20 If a(I) / 2 = Int(a(I) / 2) Then k = k + 1 b(k) = a(I) End IfNext IFor I = 1 To k Print b(I); If Int(I / 5) I / 5 Then PrintNext IPrintEnd SubPrivate Sub cmdAll_Click() Ra

15、ndomize Dim I As Integer For I = 1 To 20 a(I) = Int(Rnd() * 20 + 100) Print a(I), If Int(I / 5) = I / 5 Then Print Next I PrintEnd SubPrivate Sub cmdsort_Click() Dim I As Integer Dim J As Integer Dim Temp As Integer For I = 1 To k - 1 For J = I To k If b(I) b(J) Then Temp = b(I): b(I) = b(J): b(J) =

16、 Temp Next J Next I For I = 1 To k Print b(I); If Int(I / 5) = I / 5 Then Print Next IEnd Sub答案：=(答案1)=If a(I) / 2 Int(a(I) / 2) Then=或=If a(I) mod 2 0 Then=或=If 0a(I) mod 2 Then=或=If a(I) / 2 a(I) 2 Then=或=If int(a(I) / 2) a(I) / 2 Then=或=If a(I) 2 a(I)/2 Then=(答案2)=If Int(I / 5) = I / 5 Then Print

17、=或=If I mod 5 = 0 Then Print=或=If 0 = I mod 5 Then Print=或=If I / 5= int(I / 5) Then Print=或=If I / 5= I 5 Then Print=或=If I 5= I/ 5 Then Print=(答案3)=a(I) = Int(Rnd() * 200 + 100)第19题 （1.0分） 题号:499【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。Option ExplicitPrivate Sub Form_Click()

18、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) Dim 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 iStart: X = InputBox(输入要删除的元素：) For i = 1 To N If X = A(i) The

19、n P = i: Flag = 1 Next i If Flag = 0 Then MsgBox (没有此元素): GoTo Start For i = P To N - 1 A(i + 1) = A(i) Next i N = N + 1 Print 删除元素后的数组: For i = 1 To N Print A(i); Next iEnd Sub答案：=(答案1)=ReDim A(N)=(答案2)=A(i) = A(i + 1)=或=A(i) = A(1 + i)=(答案3)=N = N - 1第20题 （1.0分） 题号:139【程序改错】题目：随机产生并输出100以内大于50的20个

20、整数，输 出时每5个数一行。Option ExplicitPrivate Sub Form_Click()Randomize TimerDim i As Integer, ma As Integeri = 1Do Until i 50 Then Print ma; i = i + 1 If i 5 = 0 Then Print End IfEnd IfLoopEnd Sub答案：=(答案1)=i = 0=(答案2)=Do while i i=或=Do while i =i=(答案3)=If i mod 5 = 0 Then第23题 （1.0分） 题号:474【程序改错】题目:程序功能为求解一元

21、二次方程的实根，请修正程序中错误。Option ExplicitPrivate Sub Form_Load() Dim a!, b!, c!, root1#, root2#, work As Double a = Val(InputBox( 请输入系数a的值) b = Val(InputBox( 请输入系数b的值) c = Val(InputBox( 请输入系数c的值) work = b * 2 - 4 * a * c If work = 0 And a 0 Then root1 = (Sqr(work) / (2 * a) root2 = (Sqr(work) / (2 * a) Debug.P