VB复习题(带答案)(1)

1、程序填空1、'功能：要求输入若干学生的成绩，计算平均分和高于平均分的人数，并将这两个数据放入数组的最后。Private Sub Form_Click() Dim mark() As Integer, i%, n%, aver n = InputBox("输入学生的人数") ReDim mark(1 To n) aver = 0 For i = 1 To n mark(i) = Int(Rnd * 101) aver = aver + mark(i) Next i '*SPACE* preserve ReDim 【?】 mark(1 To n + 2) 

2、9;增加两个元素,存放平均分和高于平均分的人数,原来的学生成绩仍保留 mark(n + 1) = aver / n mark(n + 2) = 0 For i = 1 To n '*SPACE* If mark(i) > mark(【?】) Then mark(n + 2) = mark(n + 2) + 1 n+1 Next i For i = 1 To n Print "mark(" i; ")=" mark(i) Next i Print "平均分=" mark(n + 1), "高于平均分人数=&quo

3、t; mark(n + 2)End Sub2、功能：以下程序的功能如(图1)。Private Sub Form_Click()Dim a%, b%, c%, d!, x1, x2, p, q, ra = InputBox("请输入a的值")b = InputBox("请输入b的值")c = InputBox("请输入c的值")d = b * b - 4 * a * cp = -b / (2 * a)If d >= 0 Then'*SPACE* If 【?】 Then d>0 r = Sqr(d) / (2 * a)

4、 x1 = p + r x2 = p - r Else x1 = p x2 = p'*SPACE* 【?】 end if Print "x1=" x1, "x2=" x2'*SPACE*【?】 else q = Sqr(-d) / (2 * a) Print "x1=" p; "+" q; "i", "x2=" p; "-" q; "i"End IfEnd Sub3、功能：以下程序用于判断一个正整数（3）是否为素数。Pr

5、ivate Sub Form_Click()n = InputBox("请输入一个正整数（3）")k = Int(Sqr(n)i = 2swit = 0'*SPACE*Do While i <= k And 【?】 swit=0'*SPACE*If 【?】 Then n mod i=0 swit = 1Else'*SPACE* 【?】 i=i+1End IfLoopIf swit = 0 Then Print n; "是一个素数"Else Print n; "不是素数"End IfEnd Sub4、功能：

6、下面的程序段，用于实现在一个nXm的矩阵中，找出值最大的元素所在的行和列，并输出其值及行号和列号。Private Sub Form_Click()Dim mat() As IntegerDim n as integer, m As Integern = Val(InputBox("请输入矩阵的行数")m = Val(InputBox("请输入矩阵的列数")'*SPACE*【?】 ReDim mat(n,m) As IntegerFor i = 1 To n For j = 1 To m mat(i, j) = InputBox("请输入

7、数组元素值") mat(i, j) = Val(mat(i, j) Next jNext iPrint "所建立的矩阵为"For i = 1 To n For j = 1 To m Print mat(i, j); Next j PrintNext iMax = mat(1, 1)For i = 1 To n For j = 1 To m'*SPACE* If 【?】 Then mat(I,j)>max Max = mat(i, j) col = j'*SPACE* 【?】 row=i End If Next jNext iPrintPrin

8、t "矩阵最大的元素的值为：" mat(row, col)Print "它所在的行号为：" row; "列号为：" colEnd Sub5、功能：以下程序段用于实现矩阵转置，即将一个n×m的矩阵的行和列互换Private Sub Form_Click()Const n = 3Const m = 4Dim a(n, m), b(m, m) As IntegerFor I = 1 To n For j = 1 To m a(I, j) = Int(Rnd * 90) + 10 Next j'*SPACE*【?】 next

9、 iFor I = 1 To n For j = 1 To m'*SPACE* 【?】 b(j,i)=a(I,j) Next jNext IPrint "矩阵转置前"For I = 1 To n For j = 1 To m Print a(I, j); Next j'*SPACE* 【?】 printNext IPrint "矩阵转置后"For I = 1 To m For j = 1 To n Print b(I, j); Next j PrintNext IEnd Sub6、下面过程max()用于求3个数中最大值，利用这个过程求5个

10、数中最大值。Private Sub Form_Click()Print "5个数34、124、68、73、352的最大值是："max1 = max(34, 124, 68)'*SPACE*max1 =【?】 max(max1,73,352)Print max1End SubPublic Function max(ByVal a%, ByVal b%, ByVal c%)'*SPACE*If 【?】 Then a>b m = aElse m = bEnd If'*SPACE*If 【?】 Then m>c max = mElse max =

11、 cEnd IfEnd Function7、功能：以下程序段利用随机函数生成15个10-100之间的整数，然后用选择法将其从小到大排序。Private Sub Form_Click()Const n = 15Dim a(1 To n) As IntegerDim i As Integer, j As Integer, t As Integer, min As IntegerRandomizeFor i = 1 To n'*SPACE* a(i) =【?】 int(rnd*91+10)Next iFor i = 1 To n Print a(i);Next iPrintFor i = 1

12、 To n - 1'*SPACE* 【?】 t=I For j = i + 1 To n If a(j) < a(t) Then t = j Next j'*SPACE* If 【?】 Then t<>i min = a(i): a(i) = a(t): a(t) = min End IfNext iFor i = 1 To n Print a(i);Next iEnd Sub8、功能：下面的程序段用于实现以下功能：利用冒泡法将一组整数从小到大排序。Private Sub Form_Click()Const n = 15Dim a(1 To n) As Int

13、eger, work As BooleanDim i As Integer, j As Integer, x As IntegerRandomizeFor i = 1 To n a(i) = Int(90 * Rnd) + 10Next iFor i = 1 To n Print a(i);Next iPrint'*SPACE*For i = n To 2 【?】 step -1 work = True For j = 1 To i - 1 If a(j) > a(j + 1) Then x = a(j): a(j) = a(j + 1): a(j + 1) = x'*S

14、PACE* 【?】 work=false End If Next j'*SPACE* If work Then 【?】 exit for Next iFor i = 1 To n Print a(i);Next iEnd Sub9、功能：以下程序的功能如(图1)。Private Sub Form_Click()Dim s As Single, m As Integer, p# s = 1 For m = 1 To 10'*SPACE* p=【?】n(m) s = s + 1 / p Next m Print sEnd SubFunction n(k%) p = 1 For m

15、= 1 To k'*SPACE* p =【?】 p*m Next m'*SPACE*【?】 n=pEnd Function10、功能：从键盘输入学生分数，统计学生总人数和各分数段人数，即优秀（90-100）、良好（80-89）、中等（70-79）、及格（60-69）、不及格（60以下）的人数。Private Sub Form_Click()Dim score%, n1%, n2%, n3%, n4%, n5%msg = "请输入分数（-1结束）"msgtitile = "输入数据"score = Val(InputBox(msg, msg

16、title)'*SPACE*While 【?】 score>=0 and score<=100 total = total + 1'*SPACE* Select Case 【?】 score Case Is >= 90 n1 = n1 + 1 Case Is >= 80 n2 = n2 + 1 Case Is >= 70 n3 = n3 + 1 Case Is >= 60 n4 = n4 + 1 Case Else n5 = n5 + 1'*SPACE* 【?】 end selectscore = Val(InputBox(msg,

17、msgtitle)WendPrint n1, n2, n3, n4, n5,totalEnd Sub11、功能：以下程序段用于实现：输入两个正整数m和n，求其最大公因数和最小公倍数。Private Sub Form_Click()Dim a%, b%, num1%, num2%, tempnum1 = InputBox("请输入一个正整数")num2 = InputBox("请输入一个正整数")'*SPACE*If 【?】 Then num1<num2 temp = num1: num1 = num2: num2 = tempEnd Ifa

18、 = num1b = num2'*SPACE*Do While 【?】 b<>0 temp = a Mod b a = b'*SPACE* 【?】 b=tempLoopPrint "最大公因数为：" aPrint "最小公倍数为：" num1 * num2 / aEnd Sub12、功能：利用下面的过程求m!和m*nPrivate Sub Form_Click()Dim m As Integer, n As Integer m = 2 n = 3'*SPACE* 【?】find m,nEnd SubPrivate Su

19、b find(x As Integer, y As Integer) Dim s, i As Integer'*SPACE* 【?】 s=1 For i = 1 To x s = s * i'*SPACE* p=【?】 x*y Next i Print s, pEnd Sub13、功能：以下程序段用于求n!Private Sub Form_Click() Dim sum As Integer, n As Integer n = InputBox("请输入一个正整数") sum = 0 For i = 1 To n'*SPACE* sum =【?】 s

20、um+mul(i) Next i Print sumEnd SubPrivate Function mul(ByVal x As Integer) Dim s As Integer, i As Integer s = 1'*SPACE* For i = 1 To 【?】 x s = s * i Next i'*SPACE* 【?】 mul=sEnd Function14、功能：从键盘上输入一串字符，以"?"结束，统计输入字符中的大、小写字母和数字的个数。Private Sub Form_Click()Dim ch$, n1%, n2%, n3%n1 = 0n

21、2 = 0n3 = 0ch = InputBox("请输入一个字符")'*SPACE*Do While 【?】 ch<>? Select Case ch Case "a" To "z" n1 = n1 + 1'*SPACE* Case 【?】 "A" To "Z" n2 = n2 + 1 Case "0" To "9" n3 = n3 + 1 End Selectch = InputBox("请输入一个字符"

22、)'*SPACE* loop【?】Print n1, n2, n3End Sub15、功能：下面的程序实现：从键盘输入一个数字，将其插入一个有序数组中，插入后的数组仍保持有序。Private Sub Form_Click()Dim a(10) As Integer, x As IntegerFor i = 1 To 8 a(i) = 2 * i - 1 Print a(i);Next iPrintx = InputBox("请输入要插入的整数")'*SPACE*【?】 a(0)=xi = 8Do While a(i) > x'*SPACE* 【

23、?】 a(i+1)=a(i) i = i - 1Loop'*SPACE*If i > 0 Then 【?】 a(i+1)=xFor i = 1 To 9 Print a(i);Next iEnd Sub16、功能：过程suixian可以判断某一个数字是否是水仙花数，利用该过程找出三位数中所有水仙花数。所谓"水仙花数"是指一个3位数，其各位数字立方和等于该数本身。 Private Sub Form_Click()Dim i As IntegerFor i = 100 To 999'*SPACE* 【?】 suixian iNext iEnd SubPub

24、lic Sub suixian(x As Integer)Dim i%, j%, k%'*SPACE*i =【?】 x100j = (x - i * 100) 10k = x - i * 100 - j * 10'*SPACE*If 【?】 Then Print x i3+j3+k3=xEnd Sub17、功能：输入一个数,若大于0,则显示"+"；若小于0，则显示 "-"；若等于"0",则显示"零"。Private Sub Command1_Click( )x = Val(Text1.Text)Se

25、lect Case x'*SPACE* 【?】 Case Is>0 Label1.Caption = "+" Case Is < 0'*SPACE* 【?】 Label1.Caption = "-"'*SPACE* 【?】 case 0 Label1.Caption = "零" End SelectEnd Sub18、功能：以下程序段用于计算数组中各元素的乘积。Private Sub Command1_Click()'*SPACE* Dim a(1 To 5) 【?】, b%(2 To 10

26、), i%, t1#, t2# As Iinteger For i = 1 To 5 a(i) = i Next i For i = 2 To 10 b(i) = i Next i t1 = tim(a() t2 = tim(b() Print "t1=" t1, "t2=" t2End Sub'*SPACE*Function tim(【?】 As Integer) a() Dim t#, i% t = 1 For i = LBound(a) To UBound(a) t = t * a(i) Next i tim = tEnd Function

27、19、功能：本程序功能为，单击窗体，Form1的输出结果为' A1=10 B1=20' A2=20 B2=10'*SPACE*Public Sub Swap1【?】 x As Integer, ByVal y As Integer) (ByVal Dim t As Integer t = x x = y y = tEnd SubPublic Sub Swap2(x As Integer, y As Integer) Dim t As Integer t = x x = y y = tEnd SubPrivate Sub Form_Click() Dim a As Int

28、eger, b As Integer a = 10 b = 20 '*SPACE* 【?】 a, b Form1.Print "A1=" a, "B1=" b a = 10 b = 20 '*SPACE* 【?】 a, b Form1.Print "A2=" a, "B2=" bEnd Sub20、功能：求表达式s=x/2!+x3/4!+.+x(2n-1)/(2n)!的值，并在窗体上输出。Private Sub Form_Click() Dim x As Single Dim n As Intege

29、r Dim sum As Single x = Val(InputBox("Please input x Value:") n = Val(InputBox("Please input a integer:") '*SPACE* sum = 【?】 Print "s=" sumEnd SubFunction s(n As Integer, x As Single) As Single Dim i As Single, t As Long s = 0 For i = 1 To n t = 1 For j = 1 To 2 * i

30、 '*SPACE* 【?】 Next j '*SPACE* s = s + x (【?】) / t Next iEnd Function21、功能：写出程序运行后，单击窗体，Form1上显示的内容sum 函数的功能为累加求和' isum = 1' isum = 3' isum = 6' isum = 10' isum = 15Private Sub Form_Click() Dim I As Integer, isum As Integer '*SPACE* For I = 1 To 【?】 Swap1 isum = sum(I)

31、 '*SPACE* Form1.Print "isum " 【?】 Swap2 Next IEnd SubPrivate Function sum(n As Integer) Static j As Integer '*SPACE* 【?】 j + n sum = jEnd Function22、功能：程序输出结果为：n=3 x=42 y=9Private Sub Command1_Click() Dim n, x, y As Integer '*SPACE* n = 0: x =【?】: y = 0 1 Do While x < 20 

32、9;*SPACE* n = n 【?】 +1 y = x + y x = x * (x + 1) '*SPACE* 【?】 Loop Form1.Print "n=" & Str(n) Form1.Print "x=" & Str(x) Form1.Print "y=" & Str(y)End Sub23、功能：由输入对话框输入n（n必须为大于零且小于30的自然数），' 计算下列表达式的值，并在标签框Label1上显示。' sum=1/2+1/6+ . +1/(k*(k+1) (k<

33、;=n)Private Sub Form_Click() Dim n As Integer, sum As Double, k As Integer n = Val(InputBox("n=", "请输入自然数n(n>0 且n<30)") '*SPACE* Do While n <= 0 【?】 n >= 30 or n = Val(InputBox("n=", "请重输入") Loop sum = 0 k = 0 Do '*SPACE* k =【?】 K+1 sum = s

34、um + 1 / (k * (k + 1) '*SPACE* Loop Until 【?】 K>=n Label1.Caption = "Sum=" + Str(sum) End Sub24、功能： 用户单击命令按钮后，程序将文本框Text1中的文本反转显示，同时在文本框Text2中显示文本框Text1中字符串的个数。Private Sub Command1_Click() If Text1.Text = "" Then Exit Sub Text2.Text = 0 Else '*SPACE* Text1.Text =【?】 (T

35、ext1.Text) MyFun End IfEnd SubPrivate Sub Form_Load() Text1.Text = "" Text2.Text = 0End SubPrivate Function MyFun(s1 As String) As String Dim Pos As Integer Dim Str1 As String Dim intC As Integer Const Sp As String = "" '*SPACE* Pos = Len(【?】) s1 For intC = Pos To 1 Step -1 S

36、tr1 = Str1 & Mid(s1, intC, 1) Next intC '*SPACE* MyFun = 【?】 Str1 Text2.Text = PosEnd Function25、功能：下面的事件过程判断文本框Text1中输入的数所在区间，并在文本框Text2中输出判断结果Private Sub Command1_Click() Dim int1 As Integer4题Dim i, j, k, m As Integers = 0 :i = 2:j = 1For k = 1 To 10 s = s + i / j m = j Print (CStr(i) &

37、; "/" & CStr(j) j = i i = i + mNext '*SPACE* 【?】 = Val(Text1.Text) int1 Select Case int1 Case 0 Text2.Text = "值为0" '*SPACE* Case 【?】 1 to 10 Text2.Text = "值在1和10之间（包括1和10）" '*SPACE* Case Is > 【?】 10 Text2.Text = "值大于10" Case Else Text2.Text

38、= "值小于0" End SelectEnd Sub6题 Dim i, j, k As IntegerFor i = 1 To 5 k = 1 For j = 1 To i k = k * j Next s = s + kNextPrint (CStr(s)程序设计题1、题目：(事件)单击窗体(响应)用输入框输入一自然数，判断是"正数"、"负数或"零"，并根据输入的数用消息框显示"正数"、"负数”或"零"。1题n = InputBox("输入一个自然数")

39、If n > 0 Then result = "正数"ElseIf n < 0 Then result = "负数"ElseIf n = 0 Then result = "零"End IfMsgBox "输入的数据" & n & "为：" & result3题Dim i As Integers = 0For i = 1 To 10 s = s + 1 / (i i)NextPrint (s)2、题目：(事件)单击窗体。(响应)求200300之间既能被3整除又能

40、被7整除的数。并求出所有数之和存入变量SUM中2题Dim i As IntegerFor i = 201 To 300 If (i Mod 3) = 0) And (i Mod 7) = 0) Then Print (CStr(i) sum = sum + i End IfNextPrint sum3、题目：单击窗体。(响应)已知S=1+1/4+1/9+1/16+1/25+1/100，结果输出在窗体上。5题Dim i, j, k As IntegerFor i = 1 To 100 For j = 1 To 50 For k = 1 To 20 If (i + 2 * j + k * 5) =

41、 100) Then Print (CStr(i) Print (CStr(j) Print (CStr(k) n = n + 1 End If Next NextNext4、题目：(事件)单击窗体。(响应)在窗体上打印数列2/1,3/2,5/3,8/5,13/8的前10项，并求其和，将和保存在变量s中。5、题目：(事件)双击窗体。(响应)把一元钞票换成一分、二分和五分的硬币每种至少有一枚），求出其所有的换法，把结果输出在窗体上。将所有的换法的数目存入变量N中6、题目：单击窗体。)求1!+2!+3!+4!+5!并将结果输出到窗体上。结果存入变量S中7题Dim a(9) As IntegerDi

42、m i, s As Integera(0) = 15：a(1) = 23：a(2) = 72a(3) = 43：a(4) = 96：a(5) = 23a(6) = 3：a(7) = 65：a(8) = 88a(9) = 17：max = a(0)：min = a(0)s = 0For i = 0 To 9 If a(i) > max Then max = a(i) End If If a(i) < min Then min = a(i) End Ifs = s + a(i)Nextaver = Int(s / 10)Print (CStr(max)Print (CStr(min)P

43、rint (CStr(aver)7、题目：(事件)单击窗体。(响应)生成一个一维数组(10个数组元素依此为：' 15、23、72、43、96、23、3、65、88、17写程序求出这个数组中的最大值、最小值和平均值，并输出在窗体上。将最大值，最小值，平均值分别存入变量Max,Min,Aver中8、题目：(事件)单击窗体。(响应)在窗体上输出100200之间的所有合数。求出所有数之和存入SUM中所谓合数是指自然数中能被1和本数整除以外,还能被其他数整除的数。9、题目：(事件)单击窗体。(响应)求1020之间所有素数的乘积并输出在窗体上。将结果存入变量L中。10、题目：(事件)单击窗体。(响

44、应)求1 - 1/2 + 1/3 - 1/4 + + 1/99 - 1/100的值。将结果存入变量J中。11、题目： (事件)单击窗体。(响应)如果一个数的真因子之和等于这个数本身，则称这样的数为“完全数”。例如，整数28的真因子为1、2、4、7、11，其和是28。因此28是一个完全数。请编写一个程序，求出500以内最大的完全数。并存入变量SUM中。使用for.next语句完成程序 10题Dim i As Integer For i = 1 To 100 If i Mod 2 = 1 Then j = j + 1 / i ElseIf i Mod 2 = 0 Then j = j - 1 /

45、i End If Next Print j8题 Dim i, j, s As IntegerFor i = 100 To 200 For j = 2 To Sqr(i) If (i Mod j) = 0 Then Print (CStr(i) sum = sum + i Exit For End If NextNextPrint sum11题Dim i As Integerdim s as integerFor i = 500 To 1 Step -1 s = i For j = i - 1 To 1 Step -1 If i Mod j = 0 Then s = s - j End If N

46、ext j If s = 0 Then Exit For End IfNext iPrint isum=i9题Dim i%，j%，b As Booleanl = 1：b = FalseFor i = 10 To 20 For j = 2 To i - 2 If i Mod j = 0 Then b = True End If Next If b = False Then l = l * i End If b = FalseNextPrint Str(l)12、题目：应用选择法对数组A按升序排列12题Dim i, j, imin, temp As Integer For i = 1 To n -

47、 1 imin = i For j = i + 1 To n If a(imin) > a(j) Then imin = j Next j temp = a(i) a(i) = a(imin) a(imin) = temp Next i13、题目：单击窗体。求一个数,它除3余2，除5余3，除7余2，请将满足上面条件的最小数保存到sum变量中。使用for.next语句完成程序。13题Dim i As Integer For i = 2 To 1000 If i Mod 3 = 2 And i Mod 5 = 3 And i Mod 7 = 2 Then Print i Exit For E

48、nd IfNext i sum = i14、题目：编写函数fun，函数的功能是：判断一个字符是字母字符、数字字符还是其他字符，并做相应的显示。字母字符显示字符串"字母"，数字字符显示字符串"数字"，其他字符显示字符串"其他"，要求使用IF语句来实现。If UCase(n) >= "A" And UCase(n) <= "Z" Then fun = "字母"ElseIf n >= "0" And n <= "9"

49、Then fun = "数字"Else fun = "其他"End IfPrivate Function fun(n As String) As String'*Program*'* End *End FunctionPrivate Sub Form_Load() Show Print fun("A") Print fun("9") Print fun("&") NJIT_VBEnd SubPrivate Sub NJIT_VB() Dim i As Integer Dim l As Integer Dim a(10) As String * 1 Dim fIn As Integer Dim fOut As Integer fIn = FreeFile Open App.Path & "in.dat" For Input As #fIn fOut = FreeFile Open App.Pat