大学计算机VB程序设计考试题目

1、.实验三第1题 四则运算题设计如下窗体，为五个命令按钮编写5段代码完成四则运算及退出程序，其中在计算除法时，如果第二个数是零，在消息框中显示信息“除数为零”。Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a, b As Single a = TextBox1.Text b = TextBox2.Text TextBox3.Text = a + b End Sub Private S

2、ub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Dim a, b As Single a = TextBox1.Text b = TextBox2.Text TextBox3.Text = a - b End Sub Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click Dim a, b

3、 As Single a = TextBox1.Text b = TextBox2.Text TextBox3.Text = a * b End Sub Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click Dim a, b As Single a = TextBox1.Text b = TextBox2.Text If b = 0 Then MessageBox.Show(除数为零) Else TextBox3.Text = a /

4、 b End If End Sub Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click End End SubEnd Class第2题 一元二次方程求解输入系数后，单击“求解”按钮后，根据判别式的3种不同情况，分别显示如下的不同结果。 Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventA

5、rgs) Handles Button1.Click Dim a, b, c, delta As Double a = TextBox1.Text b = TextBox2.Text c = TextBox3.Text delta = b * b - 4 * a * c If delta 0 Then Label5.Visible = True Label6.Visible = True Label4.Text = 方程有两个不相等实根 Label5.Text = X1= & (-b + Math.Sqrt(delta) / 2 / a) Label6.Text = X2= & (-b - M

6、ath.Sqrt(delta) / 2 / a) ElseIf delta = 0 Then Label4.Text = 方程有两个相等实根 Label5.Visible = True Label5.Text = X1=X2= & (-b / 2 / a) Label6.Visible = False Else Label4.Text = 方程没有实根 Label5.Visible = False Label6.Visible = False End If End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVa

7、l e As System.EventArgs) Handles Button2.Click End End SubEnd Class第3题 文本框中前景色和背景色的不同组合目的：单选按钮的使用（1）设计窗体如下所示窗体中包含两组单选按钮、两个框架和一个命令按钮。（2）程序功能：分别单击不同的前景色和背景色按钮，在文本框中显示颜色的改变。（3）设置控件的主要属性1）窗体的文本属性为“不同前景色背景色的组合”2）初始前景色为红色、背景色为黄色3）其它属性根据图中显示来设置（4）事件代码Public Class Form1 Private Sub RadioButton1_CheckedChang

8、ed(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton1.CheckedChanged TextBox1.ForeColor = Color.Red End Sub Private Sub RadioButton2_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton2.CheckedChanged TextBox1.ForeColor = Color

9、.Green End Sub Private Sub RadioButton3_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton3.CheckedChanged TextBox1.ForeColor = Color.Black End Sub Private Sub RadioButton4_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

10、RadioButton4.CheckedChanged TextBox1.BackColor = Color.White End Sub Private Sub RadioButton5_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton5.CheckedChanged TextBox1.BackColor = Color.Yellow End Sub Private Sub Form1_Load(ByVal sender As System.Object,

11、 ByVal e As System.EventArgs) Handles MyBase.Load End SubEnd Class第4题 三位整数的反序显示在窗体中添加二个文本框、二个标签和一个命令按钮，在一个文本框中输入一个三位的整数，单击命令按钮后，在另一个框中按相反顺序显示该数，例如，输入123，则在另一个文本框中显示321。 提示：本题先将每位上的数字分解出来，这要用到整除和计算余数的运算符，例如123整除100后的结果1就是百位，而123除以10的余数就是个位，至于十位，大家可以自己确定。分解后的三位数再倒序组合成新的三位整数。Public Class Form1 Private

12、Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a, b, c, d, y As Single a = TextBox1.Text b = a 100 c = (a - 100 * b) 10 d = a - 100 * b - 10 * c TextBox2.Text = d & c & b End SubEnd Class试验五第1题 累加编写程序，计算1100之间的所有偶数之和，程序窗口界面及控件自行设计。Public Class

13、 Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim i, sum As Long For i = 2 To 100 Step 2 sum += i Next TextBox1.Text = sum End SubEnd Class第2题 使用循环求解水仙花数的问题要求：（1）参考教材上例4-3关于水仙花数的定义。（2）程序窗口界面及控件与例4-3的结果即图4-3一样。 （3）单击“开始”按钮后，在文本框中显示求

14、出的结果。Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim M, k1, k2, k3 As Integer TextBox1.Clear() For M = 100 To 999 k1 = M 100 k2 = (M 10) Mod 10 k3 = M Mod 10 If M = k1 3 + k2 3 + k3 3 Then TextBox1.Text += M.ToString(

15、) + = + k1.ToString() + 3+ + k2.ToString() + 3+ + k3.ToString() + 3 + vbCrLf End If Next End SubEnd Class第3题 统计整数的因子编写程序，向一个文本框输入一个整数，单击“开始”按钮后，找出该数的所有因子，并统计因子的个数和总和，结果在另一个文本框中显示，共有三行，其中第一行该数的所有因子，第二行显示该数的因子个数，最后一行显示该数所有因子之和，窗体界面如下：Public Class Form1 Private Sub Button1_Click(ByVal sender As System.

16、Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a, b, c, d As Long c = 0 a = TextBox1.Text b = 1 While b = a If a Mod b = 0 Then c += 1 d += b TextBox2.Text = 该整数的因子是： & +=CStr(b) + , + vbCrLf + 因子个数为： + c.ToString() + vbCrLf + 因子之和为： + d.ToString() End If b = b + 1 End While End SubE

17、nd Class第4题 判断素数编写程序，判断某个整数是否是素数，在一个文本框中输入一个整数，单击命令按钮后，在另一个文本框中显示该数是否是素数，程序代码可以参考例4-10的代码，在此基础上改写。以下是输入不同整数后的两种不同的结果，窗体结构也参照下图。 Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim i, j As Integer Dim flag As Boolean = Tru

18、e i = TextBox1.Text j = 2 While j 5 Then k = a(i) a(i) = a(11 - i) a(11 - i) = k TextBox1.Text += a(11 - i).ToString + Else k = a(11 - i) a(11 - i) = a(i) a(i) = k TextBox1.Text += a(i).ToString + End If Next完整程序; Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As

19、 System.EventArgs) Handles Button1.Click Dim a(10), k As Integer For i = 1 To 10 a(i) = InputBox(请输入整数) TextBox1.Text += a(i).ToString + Next k = 0 TextBox1.Text += vbCrLf + 交换后： For i = 1 To 10 If i 5 Then k = a(i) a(i) = a(11 - i) a(11 - i) = k TextBox1.Text += a(11 - i).ToString + Else k = a(11 -

20、 i) a(11 - i) = a(i) a(i) = k TextBox1.Text += a(i).ToString + End If Next TextBox1.Text = 交换前： + TextBox1.Text End Sub Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load End SubEnd Class第2题 元素平均编写程序，通过使用inputbox将10个整数放入一个一维数组中，然后计算这10个整数的平均值，在文本框中

21、显示平均值和这10个数中低于平均值的数Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a(10), sum, i As Integer Dim av As Single For i = 1 To 10 a(i) = InputBox(请输入整数) sum += a(i) Next av = sum / 10 For i = 1 To 10 If a(i) av Then TextBo

22、x1.Text += a(i).ToString + End If Next TextBox1.Text = 该组数的平均值为： + av.ToString + vbCrLf + 小于平均值的数有： + TextBox1.Text End SubEnd Class第3题 矩阵转置编写程序，实现矩阵转置，即矩阵的行、列互换，将一个3行4列的矩阵转换为4行3列，要示在文本框中分别显示转换前后的两个矩阵。提示: str = 交换前： + vbCrLf For i = 0 To 3 For j = 0 To 2 str += a(i, j).ToString() + b(j, i) = a(i, j)

23、 Next str += vbCrLf Next str += 交换后: + vbCrLf For i = 0 To 2 For j = 0 To 3 str += b(i, j).ToString + Next str += vbCrLf Next完整程序:Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a(,) As Integer = 1, 2, 3, 4, 4, 5, 6,

24、7, 6, 7, 8, 9 Dim i, j, b(3, 2) As Integer, str As String str = 交换前： + vbCrLf For i = 0 To 2 For j = 0 To 3 str += a(i, j).ToString() + b(j, i) = a(i, j) Next str += vbCrLf Next str += 交换后： + vbCrLf For i = 0 To 3 For j = 0 To 2 str += b(i, j).ToString() + Next str += vbCrLf Next TextBox1.Text = str

25、 End SubEnd Class试验七:第1题 完全数编写程序，找出22000之间的所有完全数。完全数是指某个整数的每个因子之和正好等于该数本身，例如： 因为6=1+2+3，28=1+2+4+7+14，所以这两个数都是完全数。要求：（1）程序窗口界面及控件自行设计。 （2）单击“开始”按钮后，在文本框中显示求出的结果。（3） 请用进度条提示.Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

26、Dim a, b, c, d, i As Integer For a = 2 To 2000 c = 0 For b = 1 To a - 1 d = a Mod b If d = 0 Then c += b End If Next If a = c Then TextBox1.Text += a.ToString + End If ProgressBar1.Value = a Next End SubEnd Class第2题 杨辉三角形打印以下的杨辉三角形（打印10行）。11 11 2 11 3 3 11 4 6 4 11 5 10 10 5 1提示：（1）使用一个二维数组a保存这些数据（2

27、）第0列、主对角线上元素都为1（3）其它元素为其上一行元素与上一行左侧元素之和,即: a(I,j)=a(i-1,j)+a(i-1,j-1)Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a(10, 10) As Integer Dim i, j As Integer a(1, 1) = 1 For i = 2 To 10 a(i, 1) = 1 For j = 2 To i a(i,

28、 j) = a(i - 1, j - 1) + a(i - 1, j) Next Next For i = 1 To 10 For j = 1 To i TextBox1.Text += a(i, j).ToString + Next TextBox1.Text += vbCrLf Next End SubEnd Class第3题 求最小值建立一个4行3列的二维数组，找出其中最小的元素所在的行和列，并在文本框中输出该值及其行、列位置。Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal

29、 e As System.EventArgs) Handles Button1.Click Dim a(,) As Integer = 45, 21, 13, 42, 15, 16, 37, 18, 29, 39, 51, 62 Dim i, j, m, b As Integer Dim min As Integer = 100 For i = 0 To 3 For j = 0 To 2 If a(i, j) min Then min = a(i, j) m = i + 1 : b = j + 1 End If Next Next TextBox1.Text += min.ToString +

30、 + m.ToString + 行 + b.ToString + 列 End SubEnd Class试验八:第1题 计算阶乘设计如下的窗体，向第一个文本框中输入一个整数，单击“计算”按钮，在另外一个文本框中显示该整数的阶乘，要求，阶乘的计算在按钮的单击事件中完成。Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a, b, c As Integer a = TextBox1.Text

31、 b = 1 For c = 1 To a Step 1 b = b * c Next TextBox2.Text = b End SubEnd Class第2题 计算阶乘设计窗体与第1题相同，向第一个文本框中输入一个整数，单击“计算”按钮，在另外一个文本框中显示该整数的阶乘，要求采用SUB子过程计算阶乘，整数通过参数传递，阶乘在子过程中显示。Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

32、Dim a As Integer a = TextBox1.Text jch(a) End Sub Sub jch(ByVal n As Integer) Dim i, s As Integer s = 1 For i = 1 To n s = s * i Next TextBox2.Text = s End SubEnd Class第3题 计算阶乘设计窗体与第1题相同，向第一个文本框中输入一个整数，单击“计算”按钮，在另外一个文本框中显示该整数的阶乘，要求采用FUCTION 函数过程，整数通过参数传递，阶乘由该过程返回。Public Class Form1 Private Sub Butto

33、n1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a As Integer a = TextBox1.Text TextBox2.Text = jch(a) End Sub Function jch(ByVal n As Integer) Dim i, s As Integer s = 1 For i = 1 To n s = s * i Next Return s End FunctionEnd Class第4题 找出一维数组元素中的最大值和最小值设计窗

34、体如下图，单击“开始”按钮后，从键盘输入10个整数，输入到一维数组中，输入时采用inputbox函数，见图（2），然后找出这10个数中的最大值和最小值，并在文本框中输出，见图， Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a(9), b, c, i As Integer a(0) = InputBox(输入第一个数) a(1) = InputBox(输入第二个数) a(2) =

35、InputBox(输入第三个数) a(3) = InputBox(输入第四个数) a(4) = InputBox(输入第五个数) a(5) = InputBox(输入第六个数) a(6) = InputBox(输入第七个数) a(7) = InputBox(输入第八个数) a(8) = InputBox(输入第九个数) a(9) = InputBox(输入第十个数) b = a(0) : c = a(0) For i = 0 To 9 If a(i) c Then c = a(i) End If TextBox1.Text += a(i).ToString + Next TextBox1.Te

36、xt = TextBox1.Text + vbCrLf + 最大数为： + c.ToString + vbCrLf + 最小数为： + b.ToString End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click End End SubEnd Class试验九:第1题 计算数列之和求a+aa+aaa+aaaa+. .+aa.a（n个），其中a为19之间的整数。 例如：当a = 1, n = 3时，求1+11+111之和；

37、当a = 5, n = 7时，求5555555555555555555555之和。Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a, n, s, i, m, b As Integer a = TextBox1.Text n = TextBox2.Text b = n For i = 1 To n m = a * (10 (i - 1) * b b = b - 1 s = s + m

38、 Next TextBox3.Text = s End SubEnd Class第2题 计算长方形的面积和周长设计如下的窗体，向前两个文本框中分别输入长和宽，单击“计算”，在另外一个文本框中显示长方形的面积，要求采用FUNCTION 函数过程计算面积，长和宽通过参数传递。Function area(ByRef a As Integer, ByRef b As Integer) As Long Dim m As Long m = a * b Return m End Function Function ccc(ByRef a As Integer, ByRef b As Integer) As

39、Integer Dim n As Integer n = 2 * (a + b) Return n End Function Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a, b, c As Integer Dim s As Long a = TextBox1.Text b = TextBox2.Text s = area(a, b) c = ccc(a, b) TextBox3.Text = s TextBox4.

40、Text = c End SubEnd Class第3题 综合题，统计各个分数段的人数设计窗体如下：编程要求：（1）单击“开始”按钮后，显示如下的消息框，向框中输入总的人数：如果输入的人数小于1，则显示下列的消息框，然后重新输入人数（2）输入人数后，接下来分别输入这些学生的分数，如果输入的分数不在0100之间，则显示下面的消息框，然后重新输入（3）输入分数时同时统计每个分数段的人数，每个分数段按下列的规定：90100：优8089：良7079：中6069：及格60分以下：不及格（4）最后按下图显示统计后的结果：（图中是输入10个分数后的结果）Public Class Form1 Private

41、Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim str As String Dim a As Integer str = 请输入学生人数 a = InputBox(str) If a 1 Then MessageBox.Show(请重新输入) End If Dim s(a), i As Integer For i = 1 To a str = 请输入分数 s(i) = InputBox(str) If s(i) 100 Then Mes

42、sageBox.Show(分数不对，请重新输入) End If Next Dim you, liang, zhong, ji, bu As Integer For i = 1 To a If s(i) = 90 Then you += 1 ElseIf s(i) = 80 Then liang += 1 ElseIf s(i) = 70 Then zhong += 1 ElseIf s(i) = 60 Then ji += 1 Else : bu += 1 End If Next str = For i = 1 To a str += s(i).ToString + Next TextBox1.Text = 分数： + vbCrLf + str + vbCrLf + 总人数 + = + a.ToString + vbCrLf + 各等级分数的人数： + vbCrLf + 优秀 + = + y