上海海事大学VB程序改错40题.docx

1、上海海事大学VB程序改错40题第2题 （1.0分） 题号:129-【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*FOUND* For m = 1 To n a(m) = x Mod 2*FOUND* x = x / 2 Next m s

2、= For m = n To 0 Step -1*FOUND* s = Str(a(m) 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

3、 = Val(InputBox(Please input first integer, 输入正整数) B = Val(InputBox(Please input second integer, 输入正整数) C = Val(InputBox(Please input third integer, 输入正整数) *FOUND* If A = C Then nTemp = A A = B B = nTemp End If *FOUND* If B = C Then nTemp = A A = C C = nTemp End If *FOUND* If A = B Then nTemp = B B

4、= C C = nTemp End If Print The integers in order is; A; B; CEnd Sub答案：=(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 =

5、1s = *For i = 5 To 1 Step -1 *FOUND* Print Spc(n) For j = 1 To 2 * m - 1 Print s; Next j Print *FOUND* n = n + 1 *FOUND* 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)

6、，利用绘图方法 在图片框中显示其图形。结果如图1-Option ExplicitPrivate Const pi = 3.14159Private Sub Command1_Click() *FOUND* Dim x As Integer Picture1.Scale (-pi, -1200)-(pi, 1200) *FOUND* For x = -pi To pi Step pi *FOUND* 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)=F

7、or 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

8、 String Sum = 0 N = InputBox(输入整数n) S1 = Str(N) *FOUND* S1 = RTrim(S1) For i = 1 To Len(S1) *FOUND* Ch = Mid(N, i, 1) *FOUND* Sum = Val(Ch) Next i Print 该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）

9、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 Integer Dim J As Integer N = 10 Print 数据： For I = 1 To N *FOUND* X(I) = Int(Rnd() * 90) Print X(I); Next I Print Print 排序： For I = 0 To N - 1 For J

10、 = I + 1 To N *FOUND* If X(I) X(J) Then *FOUND* 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(

11、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 )*FOUND* k = 0*FOUND* s = 0 Do While k = n s = s * 5 k = k + 1*FOUND* 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

12、)=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 Integer, x As Single, k As Integer n = Val(InputBox(Please input a integer value:) x = Val(Inp

13、utBox(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 & 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)=

14、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 ExplicitPrivate a(20) As Integer, b(20) As IntegerPrivate k As IntegerPrivate Sub cmdodd_Clic

15、k()Dim I As Integerk = 0For I = 1 To 20 *FOUND* 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); *FOUND* If Int(I / 5) I / 5 Then PrintNext IPrintEnd SubPrivate Sub cmdAll_Click() Randomize Dim I As Integer For I = 1 To 20 *FOUND* 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) = Temp Next J