中国海洋大学VB上机试题

1、精选优质文档-倾情为你奉上1某数组有20个元素，其值为随机产生的两位整数。现要求将前10个元素与后10个元素对换。即第1个元素与第20个元素互换，第2个数与第19个元素互换，第10个元素与第11个元素互换。在窗体上输出数组原来各元素的值与对换后各元素的值。Option ExplicitDim a(1 To 20) As Integer, i As Integer, j As Integer, t As IntegerPrivate Sub Form_Load()me.ShowPrint "原始数组是："RandomizeFor i = 1 To 20 a(i) = Int(

2、Rnd * 90+10) '10 to 99 Print a(i); If i Mod 10 = 0 Then PrintNext iPrintPrint "现在数组是："For i = 1 To 10 j = 21 - i t = a(i): a(i) = a(j): a(j) = tNext i For i = 1 To 20 Print a(i); If i Mod 10 = 0 Then Print Next iEnd Sub2从数组中删除一个数。先定义一个一维数组，大小、数组的值自定。从键盘上输入一个数，若这个数在数组当中，就把它删除；若这个数不在数组中，

3、提示“该数不在数组中”注意：1）如果数组中存在多个与该数相同的元素，每一个都能删除；2）能实现多次删除Dim a() As IntegerPrivate Sub Command1_Click()Dim i As Integer, j As Integer, n As Integer, k As Integer, m As Integer, flag As Booleann = InputBox("查找的数是：")i = 0: flag = FalseDo If a(i) = n Then j = i: flag = True For k = j To UBound(a) -

4、 1 a(k) = a(k + 1) Next k ReDim Preserve a(UBound(a) - 1) i = i - 1 End If i = i + 1Loop While (i <= UBound(a)If flag = False Then MsgBox (n & "不在该数组中")ElsePrint "删除" & n & "后的数组是:" For i = 0 To UBound(a) Print a(i); Next iEnd IfEnd SubPrivate Sub Form_Lo

5、ad()Dim i As IntegerReDim a(9) As IntegerShowRandomizePrint "原来数组为："For i = 0 To 9 a(i) = Int(Rnd * 99 + 1) Print a(i); Next iPrintEnd Sub3数组a中存放着升序排列的数据，使用array赋值，将inputbox输入的新数插入到数组中，插入后数组仍有序。注意：要求利用动态数组，能够实现多次插入Option Base 1Dim a() As Integer, i As Integer, k As Integer, m As Integer, n

6、 As IntegerPrivate Sub Command1_Click()Print "随机产生的原数组："ReDim Preserve a(10) n = 10For i = 1 To nRandomizea(i) = Int(Rnd * 99 + 1)NextFor i = 1 To n - 1 For j = i + 1 To n If a(i) > a(j) Then t = a(i): a(i) = a(j): a(j) = t End If Next j Print a(i); Next i Print a(n) End Sub Private Sub

7、 Command2_Click()n = n + 1ReDim Preserve a(n)m = InputBox("输入一个正整数")PrintPrint "插入" m; "后的数组为" If a(1) < m And a(n - 1) > m Then For i = 2 To n - 2 If a(i) <= m And a(i + 1) >= m Then j = i: Exit ForNexta(j + 1) = mFor i = 1 To nPrint a(i);NextEnd IfIf m <

8、;= a(1) Then For i = n To 1 Step -1 a(i + 1) = a(i) Nexta(1) = mFor i = 1 To nPrint a(i);NextEnd If If m >= a(10) Then a(n) = m For i = 1 To n Print a(i); Next End If End Sub 3数组a中存放着升序排列的数据，使用array赋值，将inputbox输入的新数插入到数组中，插入后数组仍有序。注意：要求利用动态数组，能够实现多次插入Option ExplicitOption Base 1Dim a() As Integer

9、, i As Integer, k As Integer, m As Integer, n As Integer, j As Integer, t As IntegerPrivate Sub Command1_Click()n = n + 1ReDim Preserve a(n)m = Val(InputBox("请输入要插入的数据")For i = 1 To n - 1If m < a(i) Then Exit ForNext iFor k = n To i - 1 Step -1a(k) = a(k - 1)Next ka(k) = mFor i = 1 To n

10、 - 1 For j = i + 1 To n If a(i) > a(j) Then t = a(i): a(i) = a(j): a(j) = t End If Next j Print a(i); Next i Print a(n) PrintEnd SubPrivate Sub Form_Load()Shown = 8ReDim a(n)a(1) = 5: a(2) = 10: a(3) = 15: a(4) = 20: a(5) = 30: a(6) = 90: a(7) = 108: a(8) = 1025For i = 1 To nPrint a(i);NextPrintE

11、nd Sub46个评委为4位歌手打分，分数介于1-100之间。去掉一个最高分，一个最低分，求出每位选手的最后得分。将4位歌手得分从高到低排列输出，同时输出该选手的编号。如： 歌手3 95分 歌手 1 87分 歌手 4 80分 歌手 2 70分Option ExplicitOption Base 1Private Type cj '自定义类型 na As String * 3fs As IntegerEnd TypeDim a(4, 6) As SinglePrivate Sub Command1_Click()Dim i As Integer, j As IntegerFor i =

12、1 To 4 For j = 1 To 6 a(i, j) = InputBox("请第" & j & "位评委给第" & i & "位选手打分") NextNext End SubPrivate Sub Command2_Click()Dim i As Integer, j As Integer, b(4) As cjDim max As Single, sum As Single, min As Single, ave As Single, t As cjFor i = 1 To 4 max = a

13、(i, 1): sum = 0 min = a(i, 1): ave = 0 For j = 1 To 6 If a(i, j) > max Then max = a(i, j) If a(i, j) < min Then min = a(i, j) sum = sum + a(i, j) Next ave = (sum - max - min) / 4b(i).na = "歌手" & i: b(i).fs = aveNextFor i = 1 To 3 For j = i + 1 To 4 If b(i).fs < b(j).fs Then t

14、= b(i): b(i) = b(j): b(j) = t End If NextPrint b(i).na; Spc(1); b(i).fs & "分"NextPrint b(4).na; Spc(1); b(4).fs & "分"End Sub5编写函数求一元二次方程ax2 bx c=0的解。注意：要求考虑方程有两相等实根、两不等实根和两个虚根的情况。Private Sub Command1_Click()a = CSng(InputBox("请输入二次项系数")b = CSng(InputBox("请输

15、入一次项系数")c = CSng(InputBox("请输入常数项")Print getresult(a, b, c)End SubPublic Function getresult(ByVal a As Single, ByVal b As Single, ByVal c As Single) As StringIf b 2 - 4 * a * c > 0 Then X1 = (-1) * b + (b 2 - 4 * a * c) 0.5) / (2 * a) X2 = (-1) * b - (b 2 - 4 * a * c) 0.5) / (2 * a

16、) getresult = "x1=" & CStr(X1) & Chr(9) & "x2=" & cstr(X2)Else X = (-1) * b / (2 * a) If b 2 = 4 * a * c Then getresult = "x=" & CStr(X) Else y = (4 * a * c - b 2) 0.5 getresult = "x1=" & CStr(X) & "+" & CStr(y) &

17、"i" & Chr(9) & "x2=" & CStr(X) & "-" & CStr(y) & "i" End IfEnd IfEnd Function6. 任意输入一组字符，统计出大写字母多少个，小写字母多少个，数字多少个？要求用过程实现。Private Sub Command1_Click()Dim a As Integer, b As Integer, c As Integera = 0: b = 0: c = 0S = Len(Text1)For i = 1

18、 To S If Mid(Text1, i, 1) <> 32 Then '没空格 If Asc("a") < Asc(Mid(Text1, i, 1) And Asc(Mid(Text1, i, 1) < Asc("z") Then a = a + 1 '小写字母 If Asc("A") < Asc(Mid(Text1, i, 1) And Asc(Mid(Text1, i, 1) < Asc("Z") Then b = b + 1 '大写的 If 48

19、 < Asc(Mid(Text1, i, 1) And Asc(Mid(Text1, i, 1) < 57 Then c = c + 1 '数字 End IfNext i Print "小写字母共有" & a & "个" Print "大写字母共有" & b & "个" Print "数字共有" & c & "个" Print "其它（包括空格）共有" & S - a - b -

20、c & "个" Print "字符个数：" & SPrintEnd Sub7随机产生一个5*5的矩阵，将主对角线和次对角线元素都置为1，并求出矩阵的四周元素之和，显示在列表框中。Private Sub Form_Click()Dim i%, j%, s1%, s2%, s3%, s4%, s%Dim mat(1 To 5, 1 To 5) '定义矩阵For i = 1 To 5 For j = 1 To 5 If i = j Or i + j = 6 Then '主对角线和次对角线 mat(i, j) = 1 Else m

21、at(i, j) = Int(Rnd * 8 + 2) '其他位置产生随机的大于2的一位数 End If NextNextFor i = 1 To 5 For j = 1 To 5 Print mat(i, j); '一定不能忘记分号； Next PrintNext i '以下为求和For i = 1 To 5 s1 = s1 + mat(i, 1) '计算第一纵行的和 s2 = s2 + mat(i, 5) '计算第五纵行的和NextFor j = 1 To 5s3 = s3 + mat(1, j)s4 = s4 + mat(5, j)NextPrin

22、t s1, s2, s3, s4End Sub8编写一个函数，能将字母按下列规律译成密码：A<->Z a<->zB<->Y b<->y即第1个字母与第26个字母互换，第i个字母与第(26-i+1)个字母互换。在文本框中任意输入一个字符串，调用该函数将密码显示在另一个文本框中。Option ExplicitDim str1 As String, str2 As String, a As String, ss As StringDim i As Integer, n As IntegerPrivate Sub Command1_Click()Text

23、1.Text = "": Text2.Text = ""End SubPrivate Sub Text1_Change()str1 = Text1.Textn = Len(str1)For i = 1 To n a = Mid(str1, i, 1) '从字符串str1中的第i个字符开始向后截取1个字符 If Asc(a) >= 97 And Asc(a) <= 122 Then '说明是小写字母 str2 = Chr(219 - Asc(a) '122 97-i使首尾对调 ElseIf Asc(a) >= 65

24、 And Asc(a) <= 90 Then '说明是大写字母 str2 = Chr(155 - Asc(a) End IfNext iss = ss & str2Text2.Text = ssEnd Sub9编写2个函数，分别求两个正整数的最大公约数和最小公倍数，用户任意输入两个数，采用函数嵌套调用，该函数将它们在窗体显示。Private Sub Form_Click()Dim A As Integer, B As IntegerA = InputBox("请输入第一个数：")B = InputBox("请输入第二个数：")Pri

25、nt "两个数为：" A; BPrint "最大公约数为：" Maxg(A, B)Print "最小公倍数为：" Ming(A, B)End SubRem 求最大公约数Private Function Maxg(A As Integer, B As Integer)Dim X As Integer, Y As Integer, r As IntegerX = IIf(A >= B, A, B)Y = IIf(A <= B, A, B)Dor = X Mod YIf r = 0 Then Exit DoX = Y: Y =

26、rLoopMaxg = YEnd FunctionRem 求最小公倍数Private Function Ming(A As Integer, B As Integer)Ming = A * B / Maxg(A, B) '使用函数套用End Function10. 编写计算阶乘的Function过程，利用ex的下列公式计算e（直到最后一项小于10-6为止）的近似值。ex1 x/1! x2/2! x3/3! xn/n! Private Sub Form_Load()ShowDim x As Integer, n As Integer, s As Doublex = InputBox(&q

27、uot;请输入一个数n：")n = 1: s = 1Do s = s + (x n) / (jc(n) '调用函数来计算阶乘 n = n + 1 Loop Until x n / (jc(n) < 10 (-6) '计算结果到达一定精度停止循环Print sEnd SubPublic Function jc(n As Integer) As DoubleDim i As Integer, s As Doubles = 1For i = 1 To n s = s * i '利用累乘计算阶乘Next ijc = sEnd Function11输入整数N，显示

28、具有N行的杨辉三角形，要求按正三角形的形式在图片框中显示。Option ExplicitPrivate Sub Form_Load()WindowState = 2ShowDim a(), n As Integer, i As Integer, j As Integer, g As Integer, e As Integern = InputBox("请输入一个数：")ReDim a(n, n)e = 110For i = 1 To n e = e - 5: g = e 'e=5使两边对称 For j = 1 To n If j > i Then a(i, j

29、) = 0 Else If i = j Then a(i, j) = 1 Else a(i, j) = a(i - 1, j) + a(i - 1, j - 1) '形成杨辉三角方式加和 End If End If If a(i, j) = 0 Then '如果j>i，则退出这一行的书写，开始写下一行 Exit For Else Picture1.Print Tab(g); a(i, j); g = g + 10 End If Next j Picture1.Print '一行一行输出Next iEnd SubPrivate Sub Picture1_Click(

30、)End Sub12编写一个过程，输出以下菱形图形： A BBB CCCCC DDDDDDD CCCCC BBB A主程序输入一个奇数（>3），调用过程在窗体上输入图形。Option ExplicitPrivate Sub Command1_Click()Dim n As Integer, a As Integern = InputBox("请输入行数n")If n Mod 2 = 0 Or n < 2 Then '如果输入的不是奇数就报错 a = MsgBox("请输入奇数")Else Call tp(n)End IfEnd Sub

31、Private Sub tp(x As Integer)Dim i As Integer, m As Integerm = 26 '先将m放在中间位置，使图像展开For i = 1 To (x + 1) / 2 '直到最多的那行 m = m - 1 '每多一个字母，向前写一位 Print Tab(m); String(2 * i - 1, Chr(64 + i) '确定每行写几个，后面的按字母顺序输出Next i 'String(N,S)是重复输出N个S字符 大写A是65 小写a是97For i = (x + 1) / 2 + 1 To x '从

32、最多的那行下一行开始写 m = m + 1 Print Tab(m); String(2 * (x + 1 - i) - 1, Chr(64 + x + 1 - i)Next iEnd Sub13编写一个将十进制转换为二进制字符串输出的函数。调用函数计算用户输入一个十进制数，在文本框中输出二进制值。注意：输入数据为负数，应该将符号位输出如 -13 结果 -1101Dim n As IntegerPrivate Sub Form_Load()Dim x%n = InputBox("请输入一个十进制数")If n < 0 Then x = -n Else x = nejz

33、 (x)End SubPublic Function ejz(m As Integer) As IntegerDim r As Integer, ss As Stringr = m Mod 2Do While m >= 1 ss = Str(r) & ss 'Str函数把数值转换为字符型 m = m 2 '注意此处为整除运算符"",一定不能写为"/" r = m Mod 2LoopIf n < 0 Then Text1.Text = "-" & ss Else Text1.Text = ss

34、End Function14输入一个整数N，产生N个随机数（范围110*N），然后采用任何2种算法实现由小到大的排序。将排序前后的数据显示出来。Dim a() As Integer, n As IntegerPrivate Sub Form_Load()Shown = InputBox("请输入正整数n")ReDim a(n)Print "排序前"For i = 1 To n a(i) = Int(Rnd * (10 * n) + 1)Print a(i);Next iEnd SubPrivate Sub Command1_Click()Dim i As

35、 Integer, j As Integer, t As IntegerPrintPrint "用比较交换法排序："For i = 1 To n - 1 For j = i + 1 To n If a(j) < a(i) Then t = a(i): a(i) = a(j): a(j) = t End If Next j Print a(i);Next i Print a(n)End SubPrivate Sub Command2_Click()Dim i As Integer, j As Integer, t As IntegerPrintPrint "用

36、冒泡法排序："For i = 1 To n - 1 For j = 1 To n - i If a(j) > a(j + 1) Then t = a(j): a(j) = a(j + 1): a(j + 1) = t '依次从第一个开始同最后一个比较，把越大的放在越后面 End If Next '一轮比较从1到n-1Next '开始下一轮比较，从1到n-2For i = 1 To n Print a(i);NextEnd SubPrivate Sub Command3_Click()Dim i As Integer, j As Integer, t As

37、 IntegerPrintPrint "用选择法排序："For i = 1 To n - 1 k = i For j = i + 1 To n If a(k) > a(j) Then k = j Next t = a(i): a(i) = a(k): a(k) = t Print a(i); NextPrint a(n)End Sub15 编写程序，在窗体上输出3100之间的所有素数。要求每行显示4个数。Private Sub Command1_Click()Print "3-100之间的所有素数为"Dim n As IntegerFor n =

38、3 To 100 If isprime(n) Then Call prtprime(n) '调用 函数和过程Next nEnd SubFunction isprime(a As Integer) As BooleanDim i As Integerisprime = TrueFor i = 2 To Int(Sqr(a) '平方根 If a Mod i = 0 Then isprime = False Exit For End IfoNext iEnd FunctionSub prtprime(b As Integer)Static cnt As Integer '静态变量cnt用来计数Print b;cnt = cnt + 1If cnt Mod 4 = 0 Then PrintEnd Sub16