VB实验及答案

vb6.0实验六习题与答案实验六专业_1、认识常用控件：单选按钮、复选框、框架、列表框、组合框、滚动条、滑动器（slider）、时钟、图形控件；2.学习在表单中创建常用控件2、学习在属性窗口和在程序代码中设置属性3、学习调用控件的方法4.学习编写每个控件、鼠标和键盘的事件过程。

二、实验内容1、单选按钮、复选框、框架1）将表格F1的标题设置为“复选框、框架和单选按钮”；将表格中复选框ch1、ch2ch1和CH2的高度和宽度分别设置为360和1000；程序运行时，check2处于非零状态。

FR1帧包含单选按钮OP1和op2。

2）设计窗体，要求①标题为“设置字体”；② 带边框的标签控件Label1以表格形式设置，高度和宽度分别为450和3800，标题为“欢迎VB”，字体大小为“4”，并显示在中间；③标题为“字体”框架包含两个标题分别为“楷体_gb2312”和“华文新魏”的单选按钮op1和op2；④ 标题为“Italic”的框架包含两个标题为“是”和“否”的单选按钮。

⑤ 编写相应控件的事件进程，使程序运行时，点击“Kaiti_gb2312”，标签控件的字体为Kaiti_gb2312，点击“Chinese New Wei”，标签控件的字体为Chinese New Wei；单击Yes，label控件的字体将为斜体。

单击“否”取消标签控件字体的斜体化。

privatesuboption1_click()标签1。

fontname=option1。

说明文字endsubprivatesuboption2_uu单击（）label1.fontname=option2.captionendsubprivatesuboption3_click()label1.fontitalic=trueendsubprivatesuboption4_click()label1.fontitalic=falseendsub3）在窗体是设置设置框text1，其中文字为：黑体、四号、居中；设置单选按钮option1和option2，标题分别为“福州大学”和“阳光学院”，编写行当的事件过程，使得程序时，单击“福州大学”或“阳光学院”，在文本框中显示“福州大学”或“阳光学院”。

End If
If Check1.Value = 1 Then
Label1.FontBold = True
Else
Label1.FontBold = False
End If
If Check2.Value = 1 Then
Label1.FontItalic = True
Else
Label1.FontItalic = False
图1.1实验1-1运行界面
三．实验结果：对象属性设置
对象
属性
属性值
说明
Form1
caption
我的第一个vb程序
窗体
Label1
caption
请输入姓名
标签
Text1
text
““
文本框
Command1
caption
显示
命令按钮
Command2
caption
清除
命令按钮
四．实验思考：
1.标签label控件设置的属性代码有哪些？
加粗
复选框
Check2
Caption
倾斜
复选框
Check3
Caption
下划线
复选框
Check4
Caption
删除线
复选框
四．实验思考：
1.模拟简易计算器Command1命令的单击事件的程序代码是什么？
Private Sub Command1_Click()
Dim a!, b!
Dim c As String
If Option1.Value = True Then
Label1.FontName = “宋体”
ElseIf Option2.Value = True Then

VB60程序设计实践教程习题及答案Vb6.0第一章一、判断题1．属性是ViualBaic对象性质的描述，对象的数据就保存在属性中。

2．控件的属性值不可以在程序运行时动态地修改。

3．许多属性可以直接在属性表上设置、修改，并立即在屏幕上看到效果。

4．所谓保存工程，是指保存正在编辑的工程的窗体。

5．面向对象的程序设计是一种以对象为基础，由事件驱动对象执行的设计方法。

6．为了使一个控件在运行时不可见，应该将该控件的Enabled属性设置为Fale。

7．保存ViualBaic文件时，若一个工程包含多个窗体或模块，则系统先保存工程文件，再分别保存各窗体或模块文件。

8．事件是由ViualBaic预先定义的对象能够识别的动作。

9．方法是ViualBaic对象可以相应的用户操作。

10．窗体中的控件，是使用工具箱中的工具在窗体上画出的各图形对象。

11．由ViualBaic语言编写的应用程序有解释和编译两种执行方式。

12．在打开一个ViualBaic工程进行修改后，要另存为一个版本，只需单击“工程另存为…”就行，因为系统将同时保存其他文件。

13．当用Load命令将窗体装入内存时，一定触发窗体的load事件和Activate事件.二、选择题1．要使某个控件不可操作，要对属性进行设置。

A、EnabledB、ViibaleC、CaptionD、Name2．下列不属于对象的基本特征的是A、属性B、方法C、事件D、函数3．当运行程序时，系统自动执行启动窗体的事件过程。

A、ClickB、LoadC、DblClickD、Unload4．ViualBaic中“程序运行”允许使用的快捷键是A、F2B、F5C、Alt+F3D、F85．改变控件在窗体中的左右位置应修改该控件的属性。

A、TopB、LeftC、WidthD、Right6．工程文件的扩展名为A、.vbpB、.baC、.fr某D、.frm7．在ViualBaic中，称对象的数据为A、属性B、方法C、事件D、封装8．下列选项中不属于属性的是10．下列关于属性设置的叙述错误的是A．一个控件具有什么属性是VB预先设计好的，用户不能改变它B．一个控件具有什么属性值是VB预先设计好的，用户不能改变它C．一个控件的大多数属性既可以在属性窗口中设置，也可以用程序代码设置D．一个控件的属性在属性窗口中设置后，还可以再利用程序代码为其设置新值第1页共75页三、填空题1．ViualBaic中可作为其它控件的容器除了窗体外，还有和2．在ViualBaic中，窗体和控件被称为3．窗体是用来存放的容器，窗体的left和top属性是相对对象的。

第4章选择结构程序设计4．1 写出数学式|x|<2.5×10-2对应的Visual Basic表达式。

【答案】x<2.5e-2 and x>-2.5e-24．2 逻辑运算符And、Or和Not的优先级最高的是哪一个。

【答案】Not4．3 已知 W=10 X=9 Y=8 Z=7 ，求下列表达式的结果。

(1) W>X And Y<=Z OR X>Y(2) X>Z Or W=Y AND Y<X(3) Not (W>Y And X=Z)(4) Not (Y<>X Or W*3>Z)【答案】(1) True(2) True(3) True(4) False4．4 写出下列十进制整数逻辑运算的结果：(1) X = 23 And 14(2) X = 23 Or 14(3) X = -1 And 19(4) X = -1 Or 10(5) X = Not -1【答案】(1) 6(2) 31(3) 19(4) -1(5) 04．5 已知变量X和Y的值分别为5、6，编写程序，交换变量X和Y的值。

【参考答案】程序代码设计Private Sub Form_Click()x = 5: y = 6t = x: x = y: y = tForm1.Print "x="; x, "y="; yEnd SubPrivate Sub Form_Load()Form1.AutoRedraw = TrueForm1.Print "x = 5", "y = 6"Form1.Print "单击窗体交换x,y的值"图4-1 程序运行结果End Sub程序运行结果如图4-1所示：4．6 从键盘输入一个学生的三科成绩，计算总分，并找出最高分。

【参考答案】（1）用户界面设计（2）控件属性设置（略）（3）程序代码设计Private Sub Command1_Click()g1 = Val(Text1.Text)g2 = Val(Text2.Text)g3 = Val(Text3.Text)Var = (g1 + g2 + g3) / 3g = g1If g < g2 Then g = g2If g < g3 Then g = g3Text4.Text = VarText5.Text = gEnd Sub图4-2 程序运行结果程序运行结果如图4-2所示。

期末自测题（A卷）文件部分的选择题要做，其它类型的题目不用做，不作考察选择题其它部分还没有时间做一、单选题（每题1分，共25分）1、211.66.160.1 是Internet上的( )。

(A) IP地址 (B)域名 (C)密码 (D)软件编号2、在以下四个www网址中，（）网址不符合www网址书写规则。

(A) (B) (C) (D) 3、下列字符中，其ASCII码值最小的一个是（）。

(A) A (B) a (C) Z (D) X4、下列软件中属于浏览器的是（）。

(A) Excel (B) Internet Explorer (C) QQ (D) Visual Basic5、电子邮件(E-mail)地址的正确形式是（）。

(A)用户名@域名 (B)用户名#域名 (C)用户名/域名 (D)用户名.域名6、下面变量名不合法的是（）。

(A) a2 (B) abcd (C) a$x (D) Cd_E7、下列表达式中，正确的Visual Basic表达式是（）。

(A) 2sin45° (B) ∏*R2 (C) x÷y×5 (D) （x+1）/（x^2+1）/28、下面逻辑表达式的值为真的是（）。

(A) "A"> "a" (B) "abc"> "bc"(C) "That"> "Thank" (D) 12> 12.19、下列过程定义语句说明不合法的是（）。

(A) Sub f1(ByRef n() As Integer) (B) Sub f1(ByRef n As Integer)(C) Sub f1(ByVal n() As Integer) (D) Sub f1(ByVal n As Integer)10、执行下面的4个打印语句，将出错的是（）。

1.输入3个数，输出最大的数2.有一元二次方程：aX2+bX+c=0，依次输入a，b，c，判断此方程是否有实根3.输入一个百分制的成绩，若大于等于60，则用消息框弹出，显示“恭喜！成绩通过！”，若小于60，则弹出消息框，显示“抱歉！成绩没有通过！”4.输入一年份，判断它是否为闰年，并显示有关信息。

（判断闰年的条件是：年份能被4整除但不能被100整除，或者能被400整除）5.输入学生的百分制成绩，转换输出为五级制成绩，90～100分转换为优秀，80～89转换为良好，70～79转换为中等，60～69转换为及格，0～60转换为不及格。

6.随机产生一个三位正整数，然后逆序输出，产生的数与逆序数同时显示。

例如，产生246，输出是642。

7.输入两个整数，求它们的最大公约数。

8.编程求200--400范围内5的倍数或7的倍数之和。

(一个数如果同时是7和5的倍数，则只能加一次。

9.计算100~300之间所有能被3和7整除的数之和10.分别统计1-100中，满足3的倍数、7的倍数的数各有多少。

11.某次歌曲大奖赛，有7个评委。

如果分别输入7个评委对某个参赛者的打分数，按照去掉一个最高分和一个最低分的计算办法，求出该参赛者的平均得分。

12.输入一串字符，统计其中字母A(不区分大小写)出现的次数。

13.我国目前有13亿人口，按人口年增长率0.8%计算，多少年后我国人口将超过26亿。

14.小猴有桃若干，第一天吃掉一半多一个；第二天吃剩下桃子的一半多一个；以后每天都吃尚存桃子的一半多一个，到第7天只剩一个，问小猴原有桃多少？15.求100以内的素数16.百元买百鸡问题。

假定小鸡每只5角，公鸡每只2元，母鸡每只3元，编程求解购鸡方案。

17.编程求斐波那契数列前11项。

（斐波那契数列：F(0)=f(1)=1, F(n)=F(n-1)+F(n-2) n>=2 ）18.将输入的字符串以反序显示。

例如：输入“ASDFGT”，显示“TGFDSA”19.随机产生10个[30,100]内的整数，求最大值及所对应的下标20.随机产生10个[30,100]内的整数，求最大值、最小值和平均值。

VB练习题(上机)含答案VB练习题(上机)含答案第一部分1 在窗体上添加一个命令按钮(名称为Cmd1，标题为"输出平均值")。

程序运行后，单击命令按钮完成以下工作：①随机产生20个0到1000的整数，将其放入一个一维数组中②求出所有元素的平均值，并显示在窗体上(如下图所示)Private Sub Cmd1_Click()Dim a%(19), i%, sum!, aver!RandomizeFor i = 0 To 19a(i) = Int(Rnd * 1001)sum = sum + a(i)Next iaver = sum / 20Print averEnd Sub2 请在名称为Form1的窗体上添加一个名称为Text1的文本框和一个名称为C1、标题为"转换"的命令按钮，如下图所示。

在程序运行时，单击"转换"按钮，可以把Text1中的小写字母转换为大写，把大写字母转换为小写，其他字符不变。

Private Sub C1_Click()Dim ch As String, ch1 As String, i%ch = Text1For i = 1 To Len(ch)If Asc(Mid(ch, i, 1)) >= 65 And Asc(Mid(ch, i, 1)) <= 90 Thench1 = ch1 + LCase(Mid(ch, i, 1)) Elsech1 = ch1 + UCase(Mid(ch, i, 1)) End IfNext iText1 = Text1 + vbCrLfText1 = Text1 + ch1End Sub3 在窗体上添加一个命令按钮(名称为MyCmd1，标题为"输出最大值")。

程序运行后，单击命令按钮完成以下工作：①随机产生30个0～1000的整数，将其放入一个一维数组中②求出其中的最大值，并显示在窗体上。

实验一问答题：1、答：常见的有visual Basic、C++、Java、SQL。

用途特点：（参考课本4-5页）2、答：代码是一行或几行命令。

程序是针对某个任务编写的有序代码的集合。

软件是程序和文档的集合。

它们的关系是：代码 < 程序 < 软件3、答：面向对象程序设计中的每一个对象都应该能够接受数据、处理数据并将数据传达给其它对象，因此它们都可以被看作一个小型的“机器”，即对象。

它能够让人们更简单地设计并维护程序，使得程序更加便于分析、设计、理解。

4、答：参考课本第9页5、答：类——是创建对象实例的模板, 包含了创建对象的属性描述和行为特征的定义。

对象——是类的一个实例，继承了类的属性、方法。

控件——是具有图形界面的对象，它同样具有属性、方法、事件，是用来设计用户界面的重要元素。

属性——是对象的性质，用来描述和反应对象特征的参数。

事件——响应对象的动作，它发生在用户与程序交互时。

如单击控件、鼠标移动、键盘按下。

过程——指附在该对象上的程序代码，是事件的处理程序。

6、答：参考课本12页到17页。

实验二问答题：1、答通用属性有：Caption标题、Enabled可用性、Visible可见性、ForeColor前景颜色、BackColor背景颜色等。

2、答标签label是用来显示信息的，不具有输入功能。

属性有Caption、BackStyle、Alignment、BorderStyle、AutoSize。

文本框用来输入、输出数据，编辑文本。

属性有Text、 Maxlength、MultiLine、 ScrollBars、 Locked 、 PassWord 。

3、答结果为：标签里显示一个“abc”，图片框里显示3行“欢迎您”。

4、答要保存2次，分别是工程文件.vbp和窗体文件.frm。

实验一：一、选择1.D2.D3.B4.A5.B6.C7.CD8.D9.D10.编程机制是C、设计方式是B11.A12.D13.D14.C15.A二、填空1.windows2. 中断3.工具箱4.代码5.分类6.form2.show7. 出现语法错误8. 错9. 事件10. 面向对象11. 工程文件结构及各文件名12. 工程13. 设计程序代码14.双击窗体15.vb的安装文件夹16.属性17.方法18.font 19. form_load() 20.对象1.Private Sub Command1_Click()Print Sqr(8), 8 ^ (1 / 3)End Sub2.Private Sub Command1_Click()For i = 100 To 110Print Sqr(i)Next iEnd Sub3.Private Sub Form_Load()Print " 郑州大学在前进！"End Sub4. Private Sub label_click()PrintLabel.caption=”蓝天白云绿水青山”End sub实验二：一、选择1.B2.C3.B4.C5.C6.C7.B8.B9.D10.A11.C12.C13.C14.B15.A16.C17.B18.D19.C20.C二、填空1. Form_Click()2. Interval、5003..vbp .frm4.left top Height、Width twip5.picture6.load7. locked8. font Alignment9. GotFocus() LostFocus() 10. 属性窗口程序代码1.Private Sub Command1_Click()Label3 = Val(Text1) * Val(Text2)Private Sub Command2_Click()Label3 = Val(Text1) / Val(Text2)End Sub2.Private Sub Command1_Click()Picture1.Visible = TruePicture1.Picture = LoadPicture("d:\tu1.jpg") End SubPrivate Sub Command2_Click()Picture1.Visible = TruePicture1.Picture = LoadPicture("d:\tu2.jpg") End SubPrivate Sub Command3_Click()Picture1.Visible = False'也可以改为：Picture1.Picture = LoadPicture("") End Sub3.Private Sub Command1_Click()Label3 = Val(Text1) * Val(Text2) End Sub4.Private Sub Command1_Click() Text2 = Text1End SubPrivate Sub Command2_Click() Text1 = ""Text2 = ""End SubPrivate Sub Form_Load() Command1.Visible = False Command2.Visible = FalseEnd SubPrivate Sub Text1_Change() Command1.Visible = True Command2.Visible = TrueEnd Sub5.Private Sub Form_Load()Image1.Picture = LoadPicture("d:\tu3.jpg")End SubPrivate Sub Command1_Click()Timer1.Enabled = TrueEnd SubPrivate Sub Command2_Click()Timer1.Enabled = FalseEnd SubPrivate Sub Timer1_Timer()Image1.Left = Int(Rnd * (Form1.ScaleWidth - Image1.Width)) Image1.Top = Int(Rnd * (Form1.ScaleHeight - Image1.Height)) End实验三：一、选择1.A2.BC3.BC4.A5.A6.A7.BCD8.D9.B10.B 11.B二、判断题不合法的变量：3. 4. 5. 6. 8. 10. 11. 14.15. 16.三、1、abs(x+y)2. (3+x*y)^23. (-b+sqr(b^2-4*a*c))/(2*a)4.sin(30*3.14/180)+exp(2)四、1. int(rnd* 71+20) 或int(rnd* 71)+202. x<0 and y>0 or x>0 and y<0 或者x*y<03. x mod 3=0 or x mod 7=0或x/3=x\3 or x/7=x\74. x>=10 and x<205. x>="A" and x<="Z"6. left(s,3) 或mid(s,1,3)操作题：2.Private Sub Command1_Click()Dim n%n = Abs(Val(Text1))Label2 = Format(n ^ 2, "#.000") & Space(2) & Format(Sqr(n), "#.000") & Space(2) & Format(n ^ 3, "#.000") & Space(2) & Format(n ^ (1 / 3), "#.000")'上句的输出也可以用下面的print方式:' Print Format(n ^ 2, "#.000"); Spc(2); Format(Sqr(n), "#.000"); Spc(2); Format(n ^ 3, "#.000"); Spc(2); Format(n ^ (1 / 3), "#.000")End Sub3.Private Sub Command1_Click()Dim x%, y%x = Int(Rnd * 900 + 100)Print "产生的随机数："; xy = (x Mod 10) * 100 + (x \ 10 Mod 10) * 10 + x \ 100Print "反序数："; Format(y, "000")End SubPrivate Sub Command2_Click()Dim x%, y As Stringx = Int(Rnd * 900 + 100)Print "产生的随机数："; xy = Trim(Str(x))Print "反序数：" & Right(y, 1) & Mid(y, 2, 1) & Left(y, 1)End Sub4.Private Sub Command1_Click()Dim m%, n%Randomizem = Val(Text1): n = Val(Text2)x = Int(Rnd * (n - m) + m)y = Int(Rnd * (n - m) + m)z = Int(Rnd * (n - m) + m)Label3 = m & "到" & n & "之间的3个随机数为: " & x & Space(3) & y & Space(3) & zEnd Sub5.Private Sub Command1_Click()Label1.Caption = DateEnd SubPrivate Sub Command2_Click()Label2.Caption = TimeEnd SubPrivate Sub Command3_Click()Label3.Caption = WeekdayName(Weekday(Date))End Sub实验四：一、选择1.C2.D3. C4.D5.A6.D7.B8.B9.A10.C二、填空1. 48.71E-01, -4.87122. 关系、逻辑、算术3. 900，100，mid(s,2,1)4.m、1,2,3 、print m & "月是第二季度"、end select三、程序结果1. X=4 y=132. 10操作题：1.方法一：Private Sub Command1_Click()x = InputBox("请输入弧度数值", "弧度转换", 0)xx = Val(x)a = x * 180 / 3.14aa = Int(a)b = (a - aa) * 60bb = Int(b)c = (b - bb) * 60cc = Format(c, "#.000")MsgBox "弧度" & x & "转换为" & aa & "度" & bb & "分" & cc & "秒" End Sub方法二：Option ExplicitPrivate Sub Command1_Click()Dim x!, a!, aa%, b!, bb%, c!, cc$x = Val(Text1)a = x * 180 / 3.14aa = Int(a)b = (a - aa) * 60bb = Int(b)c = (b - bb) * 60cc = Format(c, "#.000")Label2 = "弧度" & Text1 & "转换为" & aa & "度" & bb & "分" & cc & "秒"End Sub2.Private Sub Command1_Click()Dim x%x = Val(Text1)If x / 400 = x \ 400 Or x Mod 4 = 0 And x Mod 100 <> 0 ThenLabel2 = Text1 & "年是闰年"ElseLabel2 = Text1 & "年不是闰年"End IfEnd Sub3.Private Sub Command1_Click()Dim x%, y%, z%x = InputBox("输入第一个数")y = InputBox("输入第二个数")z = InputBox("输入第三个数")Print "输入的数是："; x; y; zIf x > y Then t = x: x = y: y = tIf y > z Then t = y: y = z: z = tIf x > y Then t = x: x = y: y = tPrint "排序结果是："; x; y; zEnd Sub4.方法一：Private Sub Command1_Click() x = Val(InputBox("请输入上网时间:")) If x <> -1 ThenSelect Case xCase Is < 10fei = 25Case 10 To 50fei = x * 2Case 50 To 100fei = x * 1.5fei = x * 1End SelectMsgBox "上网费用为:" & fei & "元" End IfEnd SubPrivate Sub Command2_Click()EndEnd Sub方法二：Private Sub Command1_Click() Dox = Val(InputBox("请输入上网时间:", , -1)) If x <> -1 ThenSelect Case xCase Is < 10fei = 25Case 10 To 50fei = x * 2Case 50 To 100fei = x * 1.5Case Is >= 100End Selectzongfei = zongfei & Space(3) & fei MsgBox zongfei, , "上网费用为"ElseExit DoEnd IfLoopEnd SubPrivate Sub Command2_Click()EndEnd Sub实验五一、选择B C B A C二、填空（1）for x=2 to 10s*(1-1/x)(2) 1 t>1E-6(3) j t(4) 5 11 51.Private Sub Command1_Click()For n = 1 To 100s = s + nNext nPrint sEnd SubPrivate Sub Command2_Click()n = 1Do While n <= 100s = s + nn = n + 1LoopPrint sEnd Sub2.Private Sub Command1_Click()For i = 0 To 20For j = 0 To 33If i * 5 + j * 3 + 1 / 3 * (100 - i - j) = 100 Then Print i, j, 100 - i - j Next jNext iEnd Sub3.Private Sub Command1_Click()n = 0DoIf n Mod 2 = 1 And n Mod 3 = 2 And n Mod 5 = 4 And n Mod 6 = 5 And n Mod 7 = 0 Then Exit Don = n + 1LoopPrint nEnd Sub4.'已知x,y,z分别是0~9中的一个数，求x,y,z的值，使得xxz+yzz=532. Private Sub Command1_Click()Dim x%, y%, z%, i%, j%For x = 0 To 9For y = 0 To 9For z = 0 To 9If (x * 100 + x * 10 + z) + (y * 100 + z * 10 + z) = 532 Then Print x, y, z NextNextNextEnd SubPrivate Sub Command2_Click()For x = 0 To 9For y = 0 To 9For z = 0 To 9If Val(x & x & z) + Val(y & z & z) = 532 Then Print x; y; z NextNextNextEnd Sub5.Private Sub Command1_Click()x = Val(Text1)y = x * 4n = 0Do While x <= yx = x * (1 + 0.1)n = n + 1LoopPrint x, nEnd Sub6.Private Sub Command1_Click()n = Val(InputBox("输入计算到第几项:", , 0))For i = 1 To ns = s + (-1) ^ (i + 1) * iNextPrint n, sEnd SubPrivate Sub Command2_Click()n = Val(InputBox("输入计算到第几项:", , 0))p = 1For i = 1 To ns = s + p * ip = -pNextPrint n, sEnd Sub7.'s=(0+1)+(0+1+2)+(0+1+2+3)+(0+1+2+3+4)+……(0+1+2+3+4+……n) Private Sub Command1_Click()Dim n%, s%n = Val(InputBox("输入计算到第几项:", , 0))s = 0: t = 0For i = 1 To nt = t + is = s + tNext iPrint sEnd SubPrivate Sub Command2_Click()Dim n%, s%n = Val(InputBox("输入计算到第几项:", , 0)) s = 0: t = 0For i = 1 To nt = 0For j = 1 To it = t + jNexts = s + tNextPrint sEnd Sub8.Private Sub Command1_Click()Dim s As Double, pi As Doublen = 1: s = 0Do While 1 / (2 * n - 1) >= 0.0001 '也可以是Do Until 1 / (2 * n - 1)< 0.0001s = s + (-1) ^ (n + 1) * 1 / (2 * n - 1)n = n + 1Looppi = 4 * sPrint piEnd Sub9.'5-9:输出所有的“水仙花数”.'所谓的“水仙花数”是指一个3位数，其各位数字的立方和等于该数本身。

对象名称
属性名称
Form1
Caption
Command1 Caption
Label1
Caption
Label2
Caption
Label3
Caption
Text1、Text2 Text
属性值 象限判断 判断 X= Y=
（3）编写事件代码： Private Sub Command1_Click() Dim x!, y!
Private Sub Command2_Click() Dim f!, c! c = Val(Text2.Text) f = 9 / 5 * c + 32 Text1 = Str(f)
End Sub
（4）程序的运行及保存。 4 求圆的面积及圆柱体的体积，界面如图 2-3 所示。
【步骤】 （1）设计应用程序的界面：在窗体上创建两个命令按钮 Command1 和 Command2，四个标签 Label1、Label2、Label3 和 Label4，四个文本框 Text1、Text2、Text3 和 Text4。 （2）设置对象的属性
【步骤】
（ 1 ） 在 窗 体 中 创 建 一 个 标 签 Label1 、 一 个 命 令 按 钮 Command1。
（2）在属性窗口中设置对象的属性：
对象名称
属性名称
属性值
Form1
Caption
设计界面
Label1
Caption
请留意此处
Command1
Caption
单击此处
（3）在 Command1 的 Click 事件中编写程序代码：
x = Val(Text1) y = Val(Text2) If x > 0 Then

VB实验参考答案VB实验参考答案VB（Visual Basic）是一种常用的编程语言，广泛应用于软件开发领域。

在学习VB的过程中，进行实验是非常重要的一部分。

本文将为大家提供一些VB实验的参考答案，帮助大家更好地理解和掌握VB编程。

实验一：简单的计算器程序要求：编写一个简单的计算器程序，能够实现基本的加减乘除运算。

参考答案：```vbPrivate Sub btnCalculate_Click()Dim num1 As DoubleDim num2 As DoubleDim result As Doublenum1 = CDbl(txtNum1.Text)num2 = CDbl(txtNum2.Text)If rbAdd.Checked Thenresult = num1 + num2ElseIf rbSubtract.Checked Thenresult = num1 - num2ElseIf rbMultiply.Checked Thenresult = num1 * num2ElseIf rbDivide.Checked ThenIf num2 <> 0 Thenresult = num1 / num2ElseMsgBox("Error: Division by zero!")End IfEnd IftxtResult.Text = resultEnd Sub```实验二：学生成绩管理系统要求：编写一个学生成绩管理系统，能够实现学生信息的录入、查询和统计功能。

参考答案：```vbPrivate Sub btnAdd_Click()Dim name As StringDim score As Integername = txtName.Textscore = CInt(txtScore.Text)lstStudents.Items.Add(name & " - " & score)End SubPrivate Sub btnSearch_Click()Dim searchName As StringDim index As IntegersearchName = txtSearch.Textindex = lstStudents.FindString(searchName)If index <> -1 ThenlstStudents.SelectedIndex = indexElseMsgBox("Student not found!")End IfEnd SubPrivate Sub btnStatistics_Click()Dim totalScore As IntegerDim averageScore As DoubleDim count As IntegerFor Each item As String In lstStudents.ItemsDim score As Integer = CInt(item.Split("-")(1).Trim()) totalScore += scorecount += 1NextaverageScore = totalScore / counttxtTotalScore.Text = totalScoretxtAverageScore.Text = averageScore```实验三：简单的图书管理系统要求：编写一个简单的图书管理系统，能够实现图书信息的录入、查询和删除功能。

vb的操作题（有答案）第一篇：vb的操作题(有答案)1.（1）在考生文件夹中有工程文件sj126.vbp，其中的窗体如图所示。

程序刚运行时，会生成一个有10个元素的整型数组。

若选中“查找最大值”（或“查找最小值”）单选按钮，再单击“查找”按钮，则找出数组中的最大值（或最小值），并显示在标签Label2中。

请去掉程序中的注释符，把程序中的？改为正确的内容。

注意：考生不得修改窗体文件中已经存在的程序。

最后把修改后的文件按原文件名存盘。

Private Sub Command1_Click()x = a(1)y = a(1)For i = 2 To 10 If Option1.Value = True Then If a(i)x Thenx = a(i)End If ElseIf a(i)< y Then y = a(i)End If Next If Option1.Value = True Then Label2.Caption = x Else Label2.Caption = y End If End Sub 2.（2）在名称为Form1的窗体上画一个名称Shape1的形状控件，在属性窗口中将其设置为圆形。

画一个名称为List1的列表框，并在属性窗口中设置列表项的值分别为1、2、3、4、5。

将窗体的标题设为“图形控件”。

单击列表框中的某一项，则将所选的值作为形状控件的填充参数。

例如，选择3，则形状控件中被竖线填充。

如图所示。

要求：程序中不得使用变量，每个事件过程中只能写一条语句。

存盘时必须存放在考生文件夹下，工程文件名为sj107.vbp，窗体文件名为sj107.frm。

在Shape控件中，可以用FillStyle属性设置图形的填充图案，0：透明，2：虚线，3：点线，4：点划线，5：双点划线，6：内实线。

List控件的Click事件过程为： Private Sub List1_Click() Shape1.FillStyle = List1.Text End Sub 3.（1）在名称为Form1的窗体上画一个文本框，名称为T ext1；再画二个命令按钮，名称分别为C1、C2，标题分别为“隐藏”、“显示”（如图所示）。

第1章VB集成环境与VB概述一、选择题第2章常用控件与界面设计一、选择题第3章数据、表达式与简单程序设计一、选择题第4章选择分支与循环一、选择题二、填空题1．5 7 13 12 14 112. 3 1 5 3 4 13. right(a$,i)4. 45. 6-i6. 6 11 10 21 13 347. 5 14 138. Is else end select9. a*(2*i-1)*(-1)*x/(2*i+2) i+110. 0 n-111. 1 t*(-1)*x^2/((2*k-1)*(2*k)) Abs(t)>eps12. count1=count+1 count1>013. sum=0 sum+j st & k & “+”14. 9 x三、编程题1.Option ExplicitPrivate Sub Command1_Click()Dim s As String, i As Integer, ch As String * 1Dim a As Integer, b As Integer, c As Integers = Text1.TextFor i = 1 To Len(s)ch = Mid(s, i, 1)If (ch >= "0" And ch <= "9") Thena = a + 1ElseIf (ch >= "A" And ch <= "Z") Or (ch >= "a" And ch <= "z") Thenb = b + 1Elsec = c + 1End IfNextPrint "数字个数"; aPrint "字符个数"; bPrint "其他字符"; cEnd Sub2.Option ExplicitPrivate Sub Command1_Click()Dim i As Integer, n As IntegerDim a As Integer, b As Integer, c As IntegerFor i = 1 To 50n = Int(Rnd * 90 + 10)Print n;If i Mod 10 = 0 Then PrintIf n <= 40 Thena = a + 1ElseIf n <= 70 Thenb = b + 1Elsec = c + 1End IfNext iPrint "小于等于40的个数："; aPrint "大于40小于等于70的个数："; bPrint "大于70的个数："; cEnd Sub3.Option ExplicitPrivate Sub Command1_Click()Dim x As SingleDim t As Long, n As Integerx = 1t = 1n = 1Do While 1 / t >= 0.0001x = x + 1 / tn = n + 1t = t * nLoopPrint xEnd Sub4.Option ExplicitPrivate Sub Command1_Click()Dim k As Integer, sum As Integer, i As Integerk = InputBox("请输入一个正整数k", "输入框")For i = 1 To Len(CStr(k))sum = sum + Mid(k, i, 1)Next iMsgBox k & "的各位数字之和" & sumEnd Sub5.Option ExplicitPrivate Sub Command1_Click()Dim i As Integer, iSum As LongFor i = 1 To 20iSum = iSum + i ^ 4NextPrint iSumEnd Sub6.Option ExplicitPrivate Sub Command1_Click()Dim a As Integer, b As IntegerDim sum1 As Integer, sum2 As LongDim i As Integer, j As IntegerFor a = 2 To 3000sum1 = 0sum2 = 0For i = 1 To a \ 2If a Mod i = 0 Then sum1 = sum1 + i Next ib = sum1For j = 1 To b \ 2If b Mod j = 0 Then sum2 = sum2 + j Next jIf sum2 = a And a < b Then Print a, bNextEnd Sub7.Private Sub Command1_Click() '打印菱形Dim i As Integer, j As IntegerClsFor i = 1 To 6 '打印菱形上边6行Print Tab(20);Print Spc(6 - i);For j = 1 To 2 * (i - 1) + 1If j = 1 Or j = 2 * (i - 1) + 1 ThenPrint "*";ElsePrint " ";End IfNext jPrintNext iFor i = 5 To 1 Step -1 '打印下半部分Print Tab(20);Print Spc(6 - i);For j = 1 To 2 * (i - 1) + 1If j = 1 Or j = 2 * (i - 1) + 1 ThenPrint "*";ElsePrint " ";End IfNext jPrintNext iEnd Sub8.Option ExplicitPrivate Sub Command1_Click()Dim i As Integer, j As Integer, iSum As IntegerPrint "连续和为1250的正整数是："For i = 1 To 500iSum = 0For j = i To 500iSum = iSum + jIf iSum >= 1250 Then Exit ForNextIf iSum = 1250 ThenPrint i; " ～"; jEnd IfNextEnd Sub9.Option ExplicitPrivate Sub Command1_Click()Dim a As Integer, b As Integer, c As IntegerFor a = 1 To 50For b = a To 50For c = b To 50If a ^ 2 + b ^ 2 = c ^ 2 ThenPrint a, b, cEnd IfNext cNext bNext aEnd Sub第5章数组一、选择题二、填空题1.Variant2.ReDim A(N)A(1)If M < A(I) Then M = A(I)3.Int(26 * Rnd) + 65Chr(t)i + 1 To 10A(i) > A(j)4.InStr(s, ",")Right(s, Len(s) - n)s5.T – 1I + 16.k = 6 - i – jmax = m7.j = 48j = j-38.i + 1i = i + 19. 23710. 3103511.numi + 1a(j)=temp三、编程题1.Option ExplicitOption Base 1Private Sub Command1_Click()Dim a(10) As IntegerDim i As Integer, max As IntegerFor i = 1 To 10a(i) = Int(90 * Rnd) + 10Print a(i);Next iPrinti = 1max = 0Do While i <= 10If a(i) Mod 3 = 0 ThenIf a(i) > max Thenmax = a(i)End IfEnd Ifi = i + 1LoopIf max = 0 ThenPrint "无要找的数"ElsePrint max & "是最大的能被3整除的数"End IfEnd Sub2．Option ExplicitOption Base 1Private Sub Command1_Click()Dim A() As IntegerDim I As Integer, m As IntegerDim K As IntegerReDim A(10)Print "原数组:";For I = 1 To 10A(I) = IPrint A(I);Next IPrintm = InputBox("????m")K = 9 + mReDim Preserve A(K)For I = 11 To KA(I) = A(I - 10)Next IFor I = 1 To 10A(I) = A(I + m - 1)Next IPrint "平移后的数组:";For I = 1 To 10Print A(I);Next IPrintEnd Sub3．Option ExplicitOption Base 1Private Sub Command1_Click()Dim I As Integer, J As Integer, K As IntegerDim a() As Integer, n As Integer, p As Integer Dim s As String, Flag As Booleanp = 1For K = 10 To 100I = 1Do While I <= 10 And Not FlagJ = 1Do While J <= 10 And Not Flagn = I ^ 2 + J ^ 2If n = K ThenFlag = TrueReDim Preserve a(p)a(p) = Kp = p + 1s = I & Str(J) & Str(K)List1.AddItem sEnd IfJ = J + 1LoopI = I + 1LoopFlag = FalseNext KEnd Sub4．Option ExplicitPrivate Sub Command1_Click()Dim A(10) As IntegerDim B(10) As Integer, S As StringDim I As Integer, J As Integer, X As IntegerA(1) = Int(90 * Rnd) + 10S = A(1)For I = 2 To 10DoX = Int(90 * Rnd) + 10For J = 1 To I - 1If X = A(J) Then Exit ForNext JIf J = I ThenA(I) = XS = S & " " & A(I)Exit DoEnd IfLoopNext IText1.Text = SB(1) = Int(90 * Rnd) + 10S = B(1)For I = 2 To 10DoX = Int(90 * Rnd) + 10For J = 1 To I - 1If X = B(J) Then Exit ForNext JIf J = I ThenB(I) = XS = S & " " & B(I)Exit DoEnd IfLoopNext IText2.Text = SS = ""For I = 1 To 10For J = 1 To 10If A(I) = B(J) ThenS = S & " " & A(I)End IfNext JNext IIf S = "" ThenText3.Text = "没有重复"ElseText3.Text = SEnd IfEnd SubPrivate Sub Command2_Click()Text1.Text = ""Text2.Text = ""Text3.Text = ""Text1.SetFocusEnd Sub5．Option ExplicitPrivate Sub Command1_Click()Dim I As Integer, J As IntegerDim a() As Integer, K As Integer, Sum As Integer K = Val(Text1.Text)I = 1DoJ = K Mod 10ReDim Preserve a(I)a(I) = JSum = Sum + JK = K \ 10I = I + 1Loop Until K = 0Text2.Text = SumEnd Sub6．Option ExplicitPrivate Sub Command1_Click()Dim a(100, 2) As Integer, K As IntegerDim I As Integer, J As IntegerDim M As Integer, N As IntegerK = 1For I = 1 To 99For J = 1 To 99If I > J ThenM = I - JN = I + JIf Sqr(M) = Int(Sqr(M)) And Sqr(N) = Int(Sqr(N)) ThenList1.AddItem I & " " & Ja(K, 1) = Ia(K, 2) = JK = K + 1End IfEnd IfNext JNext IEnd Sub7．Option ExplicitOption Base 1Dim a(5, 5) As IntegerPrivate Sub Command1_Click() '生成数组并显示Dim i As Integer, j As IntegerPicture1.ClsPicture2.ClsPicture3.ClsRandomizeFor i = 1 To 5For j = 1 To 5a(i, j) = Int(90 * Rnd) + 10Picture1.Print a(i, j);NextPicture1.PrintNextEnd SubPrivate Sub Command2_Click()Dim i As Integer, j As Integer, max As IntegerDim b(5) As Integer, c(5) As IntegerFor i = 1 To 5max = a(i, 1)For j = 1 To 5If max < a(i, j) Thenmax = a(i, j)End Ifb(i) = maxIf max = a(i, j) Then c(i) = jNext jNext iFor i = 1 To 5Picture2.Print b(i)Picture3.Print c(i)NextEnd Sub8．Option ExplicitOption Base 1Dim a(5, 5) As IntegerPrivate Sub Command1_Click() '生成数组并显示Dim i As Integer, j As IntegerPicture1.ClsPicture2.ClsLabel3.Caption = "最大值?"Label4.Caption = "最小值?"RandomizeFor i = 1 To 5For j = 1 To 5a(i, j) = Int(90 * Rnd) + 10Picture1.Print a(i, j);NextPicture1.PrintNextEnd SubPrivate Sub Command2_Click() '交换并显示Dim i As Integer, j As Integer, t As IntegerDim maxi As Integer, mini As Integer, max As Integer, min As Integer max = 10: min = 99For i = 1 To 5For j = 1 To 5If max < a(i, j) Thenmax = a(i, j)maxi = iEnd IfIf min > a(i, j) Thenmin = a(i, j)mini = iEnd IfNextNextIf maxi <> mini ThenFor j = 1 To 5t = a(maxi, j)a(maxi, j) = a(mini, j)a(mini, j) = tNext jFor i = 1 To 5For j = 1 To 5Picture2.Print a(i, j);NextPicture2.PrintNextLabel3.Caption = "最大值" & max & "在第" & maxi & "行"Label4.Caption = "最小值" & min & "在第" & mini & "行"ElsePicture2.Print "最小值和最大值在一行"Label3.Caption = "最大值" & max & "在第" & maxi & "行"Label4.Caption = "最小值" & min & "在第" & mini & "行"End IfEnd SubPrivate Sub Form_click()Picture1.ClsPicture2.ClsLabel3.Caption = ""Label4.Caption = ""End Sub9．Option Base 1Private Sub Command1_Click()Dim i As Integer, j As Integer, n As Integer, a() As Integern = InputBox("请输入一个奇数N：")If n Mod 2 = 0 ThenMsgBox ("请重新输入奇数！")End IfReDim a(n, n)For i = 1 To nFor j = 1 To nIf i = (n + 1) / 2 And j = (n + 1) / 2 Thena(i, j) = -1ElseIf i = j Or i + j = n + 1 Thena(i, j) = 1Elsea(i, j) = 0End IfNext jFor i = 1 To nFor j = 1 To nPrint a(i, j);Next jPrintNext iEnd Sub10．Option Base 1Dim a(10) As IntegerPrivate Sub Command1_Click()Dim i As IntegerPrint "生成的数组："RandomizeFor i = 1 To 10a(i) = Int(Rnd * 90) + 10Print a(i);NextPrintEnd SubPrivate Sub Command2_Click()Dim i As Integerx = InputBox("请输入要删除的数组元素下标：") Print "删除第" & x & "个数组元素后："For i = x + 1 To 10a(i - 1) = a(i)NextFor i = 1 To 9Print a(i);NextEnd Sub11．Option ExplicitDim a(20) As Integer, i As IntegerPrivate Sub Command1_Click()RandomizeFor i = 1 To 20a(i) = Int(Rnd * 9) + 1Text1 = Text1 & a(i) & " "If i = 10 Then Text1 = Text1 & vbCrLf NextPrivate Sub Command2_Click()Dim j As Integer, k As Integer, b(20) As Boolean 'b(2)用来记录a(2)是否和前面的数相同，相同记为true，不再统计For i = 1 To 20k = 1If b(i) = False Then '如果b(i)=False，表示a(i)没有被统计过For j = i + 1 To 20If a(i) = a(j) Thenk = k + 1b(j) = TrueEnd IfNext jList1.AddItem a(i) & "出现次数:" & kEnd IfNextEnd SubPrivate Sub Command3_Click()Text1 = ""List1.ClearEnd Sub第6章过程一、选择题二、填空题1. 6 .2. 4 20 1013.第一行是 6 26 、第三行是-2 984.第一行10 6 、第二行 5 -55.第一行 6 5 、第三行8 76.第一行11 、第二行77.Fun(i)Fun=p8.第一行 4 、第二行2079.第一行29 、第二行28.710.J=kb( ) As Integerb( k-1) =b(k)i11.第一行gec 、第二行ge 、第四行 312.p1 = True And p2 = True 或p1 And p2= isp(i)Isp = Truem Mod i = 013.Convert(st)Len(s)"A" To "F"k = k + p * h14.isualVisualVisu15.s + an + 1x As Single, n As Integer 、p * (x + i) / ((2 * i - 1) * i * x)16.27617.Left(s, 1)Mid(s, i - 1, 1) = Mid(s, i, 1)n = 1c & CStr(n)18.chtempTrue19.val(mid(s,i,j))n as longprime=True20.A(2,2)的值是 6 ，A(3,1) 的值是8 ；A(4,2) 的值是 321.Option1(i)X22.1023.第一行7 6 ，第二行16 16 ，第三行，4524.第一行15 1 ，第二行35 3 ，第三行，50三、改错题1、Option Base 1Private Sub Command1_Click()Dim A() As Integer, I As Integer, J As Integer, Logic As Boolean Dim K As IntegerReDim A(1)A(1) = 50————————'K=1For I = 51 To 149K = 1 '位置错Logic = FalseCall Sub1(A, I, Logic)If Logic ThenK = K + 1ReDim A(K) 'ReDim Preserve A(K)A(K) = IEnd IfNext IFor I = 1 To UBound(A)Text1 = Text1 & Str$(A(I))If I Mod 5 = 0 Then Text1 = Text1 & vbCrLfNext IEnd SubPrivate Sub Sub1(A() As Integer, N As Integer, F As Boolean) Dim I As Integer, J As Integer, Ub As IntegerUb = UBound(A)For I = 1 To UbFor J = 2 To A(I)If A(I) Mod J = 0 And N Mod J = 0 ThenExit For 'Exit SubEnd IfNext JF = TrueNext IEnd Sub2、Option ExplicitOption Base 1Private Sub Command1_Click()Dim I As Integer, Flg As Boolean, S1 As Integer, S2 As IntegerDim J As Integer, K As Integer, P() As IntegerReDim P(1)P(1) = 2For I = 3 To 150 Step 2For J = 2 To Sqr(I)If I Mod J = 0 Then Exit ForNext JIf J > Sqr(I) ThenReDim Preserve P(UBound(P) + 1)P(UBound(P) + 1) = I 'P(UBound(P)) = IEnd IfNext IFor I = 80 To 125If fun(I, P, S1, S2) Then 'If fun(I, P, S1, S2)Text1 = Text1 & Str$(I) & "=" & Str(S1) & "*" & Str$(S2) & vbCrLf End IfNext IEnd SubPrivate Function fun(N As Integer, P() As Integer, S1 As Integer, S2 As Integer) As Boolean Dim I As Integer, J As IntegerFor I = 1 To UBound(P)For J = 1 To UBound(P) - 1If N = P(I) * P(J) ThenS1 = P(I)S2 = P(J)'fun = TrueExit Functionfun = True '位置错End IfNext JNext IEnd Function3、Option ExplicitPrivate Sub Get_Chess(Chess() As Integer, idx As Integer, Over As Integer) 'ByVal idx As IntegerDim Ub As Integer, Counter As Integer, K As IntegerUb = UBound(Chess)Chess(idx) = 0Counter = 1K = 0 '位置错Do Until Counter = Ub - 1Do Until K = 2idx = idx + 1If idx > Ub Then idx = 1K = K + Chess(idx)LoopChess(idx) = 0Counter = Counter + 1LoopFor Over = 1 To UbIf Chess(Over) <> 0 Then Exit ForNext OverEnd SubPrivate Sub Command1_Click()Dim Chess(32) As Integer, I As Integer, J As IntegerDim K As Integer, idx As IntegerFor I = 1 To 32For J = 1 To 32Chess(J) = 1Next JCall Get_Chess(Chess, I, K)If K = 23 ThenText1 = "从第" & Str$(I) & "号棋子开始取"Exit ForEnd IfNext IEnd Sub4、Option ExplicitPrivate Sub Form_Click()Dim S As String, Flg As BooleanDoS = InputBox("输入一个自然数")If S = "" Or Not IsNumeric(S) ThenMsgBox "请重新输入", 48 + vbOKOnlyElseExit DoEnd IfLoopjudge(S, Flg) ' Call judge(S, Flg) 或judge S, Flg If Flg ThenPrint S; "是回文数"ElsePrint S; "不是回文数"End IfEnd SubPrivate Sub judge(Ch As String, F As Boolean)Dim L As Integer, I As IntegerL = Len(Ch)F = True ' F = FalseFor I = 1 To LIf Mid$(Ch, I, 1) <> Mid$(Ch, L + 1 - I, 1) Then Exit Sub Next IF = False ' F = TrueEnd Sub四、编程题1.Private Function Prime(a As Integer) As BooleanDim i As IntegerFor i = 2 To Sqr(a)If a Mod i = 0 Then Exit FunctionNext iPrime = TrueEnd Function'方法一Private Sub Command1_Click()Dim m As Integer, i As Integerm = InputBox("请输入一个大于2 的偶数")If m <= 2 Or m Mod 2 <> 0 Then MsgBox "请输入大于2的偶数": Exit Sub If Prime(2) And Prime(m - 2) ThenPrint m & "=2 +" & m - 2ElseDoi = i + 1If Prime(2 * i + 1) And Prime(m - (2 * i + 1)) ThenPrint m & "=" & 2 * i + 1 & "+" & m - (2 * i + 1)Exit DoEnd IfLoop While 2 * i + 1 < m - (2 * i + 1)End If'方法二Private Sub Command2_Click()Dim m As Integer, i As Integer, p() As Integer, n As IntegerDim flg As Booleanm = InputBox("请输入大于2的偶数")If m <= 2 Or m Mod 2 <> 0 Then MsgBox "请输入大于2的偶数": Exit Sub ReDim p(1)p(1) = 2n = 1For i = 3 To m - 2 Step 2If Prime(i) Thenn = n + 1ReDim Preserve p(n)p(n) = iEnd IfNext iFor i = 1 To nFor j = 1 To nIf p(i) + p(j) = m ThenPrint m & "=" & p(i) & "+" & p(j)flg = TrueExit ForEnd IfNext jIf flg = True Then Exit ForNext iEnd Sub2．Private Function Fact(a As Integer) As LongIf a = 0 Or a = 1 ThenFact = 1ElseFact = a * Fact(a - 1)End IfEnd FunctionPrivate Sub Command1_Click()Dim n As Integer, m As Integer, result As Singlen = Val(Text1.Text)m = Val(Text2.Text)If n >= m Thenresult = Fact(n) / Fact(m) / Fact(n - m)Text3.Text = resultMsgBox "要求n>=m,请重新输入"Text1.Text = ""Text2.Text = ""Text1.SetFocusEnd IfEnd SubPrivate Sub Command2_Click()Text1.Text = ""Text2.Text = ""Text3.Text = ""Text1.SetFocusEnd Sub3．Private Function Istgs(n As Integer) As BooleanDim s As String, L As IntegerL = Len(CStr(n))s = CStr(n ^ 2)If Right(s, L) = n Then Istgs = TrueEnd FunctionPrivate Sub Command1_Click()Dim n As IntegerFor n = 10 To 300If Istgs(n) Then List1.AddItem n & "^2" & "=" & n ^ 2 Next nEnd SubPrivate Sub Command2_Click()EndEnd Sub4．Private Sub Command1_Click()Dim a(3, 4) As Integer, i As Integer, j As IntegerDim m As Integer, mj As IntegerRandomizeFor i = 1 To 3For j = 1 To 4a(i, j) = Int(900 * Rnd + 100)Print a(i, j);Next jPrintNext iFor i = 1 To 3m = 0Call max(a, i, m, mj)Print "第" & i & "行最大值为" & m & ",在第" & mj & "列"Next iEnd SubPrivate Sub max(a() As Integer, i As Integer, m As Integer, maxj As Integer) Dim j As Integerm = a(i, 1): maxj = 1For j = 2 To UBound(a, 2)If a(i, j) > m Thenm = a(i, j)maxj = jEnd IfNext jEnd SubPrivate Sub Command2_Click()EndEnd Sub5．Private Function Judge(n As Integer) As BooleanDim sum As Integersum = yz(n)If yz(sum) = 2 * n Then Judge = TrueEnd FunctionPrivate Function yz(n As Integer) As IntegerDim i As IntegerFor i = 1 To nIf n Mod i = 0 Then yz = yz + iNext iEnd FunctionPrivate Sub Command1_Click()Dim n As IntegerFor n = 1 To 500If Judge(n) Then Print nNext nEnd SubPrivate Sub Command2_Click()EndEnd Sub6．Private Sub Command1_Click()Dim n As Integer, j As Integer, flg As BooleanFor n = 2 To 30flg = FalseFor j = 2 To nIf pfs(j) And n Mod j = 0 Thenflg = TrueExit ForEnd IfNext jIf flg = False Then Print n;Next nEnd SubPrivate Function pfs(n As Integer) As BooleanIf Sqr(n) = Int(Sqr(n)) Then pfs = TrueEnd Function7．Private Function fxs(n As Long) As LongDim i As Integer, s As StringFor i = 1 To Len(CStr(n))s = Mid(CStr(n), i, 1) & sNext ifxs = sEnd Function'判断某数是否为回文数Private Function Hws(n As Long) As BooleanDim i As Integer, s As String, L As Integers = CStr(n): L = Len(s)For i = 1 To Len(s) / 2If Mid(s, i, 1) <> Mid(s, L + 1 - i, 1) Then Exit Function Next iHws = TrueEnd FunctionPrivate Sub Command1_Click()Dim x As Long, t As Longx = InputBox("请输入一个正整数：")t = xDo While Hws(t) = FalsePrint t; "+"; fxs(t); "="; t + fxs(t)t = t + fxs(t)LoopEnd Sub8．Private Function fxs(n As Long) As LongDim i As Integer, s As StringFor i = 1 To Len(CStr(n))s = Mid(CStr(n), i, 1) & sNext ifxs = sEnd FunctionPrivate Sub Command1_Click()Dim n As Long, t As LongFor n = 1 To 999t = fxs(n)If t ^ 2 = fxs(n ^ 2) And n Mod 10 <> 0 And n < t ThenList1.AddItem n & " " & tList2.AddItem n & "^2" & "=" & n ^ 2 & " " & t & "^2" & "=" & t ^ 2 End IfNext nEnd Sub9．Private Function fxs(n As Long) As LongDim i As Integer, s As StringFor i = 1 To Len(CStr(n))s = Mid(CStr(n), i, 1) & sNext ifxs = sEnd FunctionPrivate Function Judge(n As Integer) As BooleanDim i As Integer, L As Integer, a(9) As Integer, t As IntegerIf Sqr(n) = Int(Sqr(n)) ThenL = Len(CStr(n))For i = 1 To Lt = Mid(CStr(n), i, 1)a(t) = 1Next iFor i = 0 To 9Sum = Sum + a(i)Next iIf Sum = L - 1 Then Judge = TrueEnd IfEnd FunctionPrivate Sub Command1_Click()Dim a As IntegerFor a = 300 To 2000If Judge(a) Then List1.AddItem aNext aEnd Sub10．Private Function F(n As Integer) As BooleanDim i As IntegerFor i = 1 To Len(CStr(n))If i Mod 2 = 1 And Mid(CStr(n), i, 1) Mod 2 <> 1 Then Exit FunctionIf i Mod 2 = 0 And Mid(CStr(n), i, 1) Mod 2 <> 0 Then Exit Function Next iF = TrueEnd FunctionPrivate Sub Command1_Click()Dim a(8) As Integer, i As Integer, j As IntegerRandomizeDot = Int(900 * Rnd + 100)For j = 1 To iIf t = a(j) Then Exit ForNext jIf j = i + 1 Theni = i + 1a(i) = tList1.AddItem a(i)If F(a(i)) Then List2.AddItem a(i)End IfLoop Until i = 8End SubPrivate Sub Command2_Click()List1.ClearList2.ClearEnd SubPrivate Sub CmdEnd_Click()EndEnd Sub11．Private Function prime(a As Integer) As BooleanDim i As IntegerFor i = 2 To Sqr(a)If a Mod i = 0 Then Exit FunctionNext iprime = TrueEnd FunctionPrivate Function nx(n As Integer) As IntegerDim i As Integer, s As StringFor i = 1 To Len(CStr(n))s = Mid(CStr(n), i, 1) & sNext inx = Val(s)End FunctionPrivate Sub Command1_Click()Dim n As Integer, t As IntegerFor n = 100 To 900t = nx(n)If prime(n) And prime(t) And n < t ThenList1.AddItem "(" & n & "," & t & ")"End IfNext nEnd SubPrivate Sub Command2_Click()List1.ClearEnd Sub12．Option Base 1Dim a(4, 5) As IntegerPrivate Sub Command1_Click()Dim i As Integer, j As IntegerRandomizeFor i = 1 To 4For j = 1 To 5a(i, j) = Int(Rnd * 90 + 10)Picture1.Print a(i, j);Next jPicture1.PrintNext iEnd SubPrivate Sub Fp(a() As Integer, i As Integer, maxj As Integer, Flg As Boolean) Dim max As Integer, j As Integer, t As Integermax = a(i, 1): maxj = 1For j = 2 To UBound(a, 2)If a(i, j) > max Thenmax = a(i, j)maxj = jEnd IfNext jFor t = 1 To UBound(a, 1)If a(t, maxj) > max ThenFlg = FalseExit SubEnd IfNextFlg = TrueEnd SubPrivate Sub Command2_Click()Dim i As Integer, m As Integer, mj As Integer, f As BooleanFor i = 1 To 4f = Falsem = 0: mj = 0Call Fp(a, i, mj, f)If f = True ThenText1.Text = Text1.Text & "(" & i & "," & mj & "):" & a(i, mj) & vbCrLf End IfNext iEnd SubPrivate Sub Command3_Click()Picture1.ClsText1 = ""End Sub13．Private Sub Command1_Click()Dim a(30) As Integer, i As Integer, j As IntegerDim Flag As BooleanRandomizeDot = Int(900 * Rnd + 100)For j = 1 To iIf t = a(j) Then Exit ForNext jIf j = i + 1 Theni = i + 1a(i) = tText1.Text = Text1.Text + Str(a(i))If i Mod 10 = 0 Then Text1.Text = Text1.Text + vbCrLfIf IsDown(a(i)) ThenList1.AddItem a(i)Flag = TrueEnd IfEnd IfLoop Until i = 30If Flag = False Then List1.AddItem "无降序数"End SubPrivate Function IsDown(n As Integer) As BooleanDim i As Integer, S As StringS = CStr(n)For i = 1 To Len(S) - 1If Mid(S, i, 1) < Mid(S, i + 1, 1) Then Exit FunctionNext iIsDown = TrueEnd FunctionPrivate Sub Command2_Click()List1.ClearText1 = ""End Sub14．Option ExplicitPrivate Sub CmdFind_Click()Dim i As Integer, p As String, st As String, st1 As StringFor i = 100 To 999st = ""If csum(i) = zyz(i, st) Thenp = CStr(i)st1 = Left(p, 1) & "+" & Mid(p, 2, 1) & "+" & Right(p, 1)List1.AddItem i & ": " & st1 & "=" & Left(st, Len(st) - 1)End IfNext iIf List1.ListCount = 0 ThenList1.AddItem "无满足要求的数!"End IfEnd SubPrivate Function csum(m As Integer) As Integer '求各位数字之和Dim i As Integer, p As Stringp = CStr(m)For i = 1 To Len(p)csum = csum + Val(Mid(p, i, 1))Next iEnd FunctionPrivate Function zyz(ByVal m As Integer, st As String) As Integer '求所有质因子之和Dim i As Integeri = 2DoIf m Mod i = 0 Thenzyz = zyz + ist = st & i & "+"m = m \ iElsei = i + 1End IfLoop Until m = 1End Function15．Private Sub Command1_Click()Dim k As Integer, i As Integerk = InputBox("请输入要求的数列项数：")List1.AddItem "共输出前" & k & "项数列"For i = 0 To kList1.AddItem p(i)NextEnd SubPrivate Function p(n As Integer) As IntegerIf n = 0 Or n = 1 Or n = 2 Thenp = 1Elsep = p(n - 2) + p(n - 3)End IfEnd Function第7章文件一、选择题二、填空题1．顺序文件和随机文件2． EOF3． Write和Print4．返回或设置当前的工作目录5．5116．文件的写语句7．Append8．LOF9．关闭10．Pattern11．【1】For Input 【2】#2 【3】Not EOF(2) 12．【1】”END”【2】Text1.Text 或者Text113．【1】Input 【2】ch 【3】Len(mystr) 14．【1】Number 【2】s15．【1】For Append As #1 【2】"end" 【3】ct,nt 16．【1】For Input 【2】For Output As #2 【3】Not EOF(1) 【4】Line Input #1,str1 【5】Close #1,#2 【6】Kill “C:\old.txt 17．【1】Open "C:StuData．txt" For OutPut As #1 【2】Write 18．【1】"C:\data.txt" 【2】#1, a(i) 【3】k>1 And a(k-1)>b 【4】k = k -1三、综合题1．Option Base 1Dim arr(100) As IntegerPrivate Sub Command1_Click()Dim i As IntegerOpen "c:\in18.txt" For Input As #6For i = 1 To 100Input #6, arr(i)Next iClose #6End SubPrivate Sub Command2_Click()Dim i As IntegerText1.Text = ""Open "c:\out18.txt" For Output As #8For i = 1 To 100If arr(i) Mod 2 <> 0 ThenText1.Text = Text1.Text & Str(arr(i))Write #8, arr(i)End IfNext iClose #8End Sub2．Dim str As StringDim n As LongPrivate Sub Command1_Click()CommonDialog1.Filter = "文本文件(*.txt)|*.txt|All Files(*.*)|*.*"CommonDialog1.FilterIndex = 1CommonDialog1.Action = 1Open CommonDialog1.FileName For Input As #2n = LOF(2)str = Input(n, #2)Text1.Text = strClose #2End SubPrivate Sub Command2_Click()Dim i As IntegerFor i = 1 To Len(str)If Asc(Mid(str, i, 1)) <= Asc("Z") And Asc(Mid(str, i, 1)) >= Asc("A") Then Mid(str, i, 1) = LCase(Mid(str, i, 1))ElseIf Asc(Mid(str, i, 1)) <= Asc("z") And Asc(Mid(str, i, 1)) >= Asc("a") Then Mid(str, i, 1) = UCase(Mid(str, i, 1))End IfNext iText1.Text = strEnd SubPrivate Sub Command3_Click()Open "D:\out.txt" For Output As #3Print #3, strClose #3End Sub第8章程序调试一．选择题二．改错题1.a(i)=int(Rnd*19)+1 →a(i)=int(rnd*20)+1For l=1 to a(i)+1 →for i=2 to a(i)+1If l=a(i) →if l <> a(i)K=k+1 →k=k-1。

VB学习与实验指导测试题参考答案第一章第二章第三章第四章第五章第六章第七章第八章第九章综合测试题一综合测试题二下篇实验教程实验2 Visual Basic 变量、函数与表达式的使用实验2-1 算术运算符的使用13178332262-2-22007-10-153 2.857143 2.85714285714286实验2-2 字符运算符的使用20071020071020172007-10-10102007-10-20出错，类型不匹配实验2-3 关系运算符的使用FalseFalseFalseFalseFalseFalseFalseTrueFalseTrue实验2-4 逻辑运算符的使用TrueTrueFalseTrueFalseFalseTrueTrueFalse5-59实验2-5 常用函数的使用3.14 3.147.389056098930651 -1 .999999998205103 4-1 1 0.70554755825 251250 0A a65 9748 688 -98 -89 -9aaa 4.5 aaa4.516 5Visua 6.0sua Basic Basic 6.0abcde EFGBasic Basic BasicVisual Basic 6.0 Basic8 8aaa dd2011-3-152011-3-15 14:35:5215320113001.731.731.7317.32E-010173%实验3 算法基础及程序控制结构实验3-1 三个数的交换A=CC=BB=TBC实验3-2 求周长和面积Const PI=3.14159262*PI*RPI*R*RPicture1.ClsFormat(L, ".00")Format(M, ".00")实验3-3 求分段函数的值x=Val(Text1.Text)y=1+Sin(x)y=Log(x)Text1.Text = ""Text2.Text = ""实验3-4 求一元二次方程的根Val(Text2.Text)Val(Text3.Text)b ^ 2 - 4 * a * c"x1=" & (-b + Sqr(delt)) / (2 * a)"x2=" & (-b - Sqr(delt)) / (2 * a)Text2.Text = ""Text3.Text = ""End实验3-5 判断素数N Mod k = 0k=NN Mod i=0k=2实验3-6 求最大公约数和最小公倍数M<NL=ML=NM Mod k = 0 And N Mod k = 0Text3.Text = kExit ForM>NL=ML=Nk Mod M = 0 And k Mod N = 0Text4.Text = kExit For实验3-7 判断升序数、降序数CStr(N)Len(S) – 1Mid(S, k, 1) >= Mid(S, k + 1, 1)k = Len(S)N = Val(Text1.Text)S = CStr(N)For k = 1 To Len(S) - 1If Mid(S, k, 1) <= Mid(S, k + 1, 1) Then Exit For Next kk = Len(S)实验3-8 判断回文数1Len(s)\2-1Mid(S, k, 1) <> Mid(S, Len(S) - k + 1, 1)k = Len(S) \ 2Mid(S, k, 1) + S1S = S1实验3-9 求级数的值Val(Text1.Text)1x ^ ns * nt / s <= 10 ^ -6Text2.Text = y实验3-10 查找数字串并求和Text1.Text = ""Text2.Text = ""List1.ClearText1.TextFalseWhile Mid(s, i, 1) >= "0" And Mid(s, i, 1) <= "9" Flag = Truek = k * 10 + Mid(s, i, 1)i = i + 1Flag = Truesum + kText2.Text = sum实验3-11 随机产生20个奇数Int((99 - 10 + 1) * Rnd) + 10a Mod 2 = 1n Mod 5 = 0Picture1.Cls实验3-12 加密解密Chr(Asc("a") + (Asc(c) - Asc("a") + 3) Mod 26)c = Chr(Asc("A") + (Asc(c) - Asc("A") + 3) Mod 26) c & s2Text2.TextLen(s2)Mid(s2, i, 1)c = Chr(Asc("a") + (Asc(c) - Asc("a") + 23) Mod 26) c = Chr(Asc("A") + (Asc(c) - Asc("A") + 23) Mod 26) c & s1s1Text1.Text = ""Text2.Text = ""实验3-13 统计单词个数Text1.TextMid(s, i, 1) <> " " And i <= Len(s)i = i + 1Mid(s, start, i - start)nText1.Text = ""List1.Clear实验4 数组的使用实验4-1 一维数组的产生及输出i = 1 To 20Int((9 - 0 + 1) * Rnd + 0)i = 1 To 20Print a(i);Printi = 1 To 20Picture1.Print a(i);If i Mod 5 = 0 Then Picture1.Printi = 1 To 20Text1.Text & Space(2) & a(i)If i Mod 5 = 0 Then Text1.Text = Text1.Text & vbCrLf v In aIf i Mod 5 = 0 Then Picture2.Print实验4-2 选手得分Int((50 - 10 + 1) * Rnd + 10) / 10i = 1 To 6sum = sum + score(i)max = score(1)min = score(1)score(i) > max Then max = score(i)score(i) < min Then min = score(i)(sum - max - min) / 4实验4-3 产生10个互不相同的整数Int((999 - 10 + 1) * Rnd + 10)t Mod 10 = 5Then Exit Forn= n + 1a(i) = tFor i = 1 To 10Print a(i);If i Mod 5 = 0 Then PrintNext i实验4-4 统计数字出现的次数IsNumeric(S) = FalseExit SubLen(S)c >= "0" And c <= "9"A(c) = A(c) + 1A(k) <> 0m = m + 1实验4-5 排序1 To 10Int((99 - 10 + 1) * Rnd + 10)Text1.Text & A(n) & " "1 To 9i + 1 To 10A(i) > A(j)T = A(j)A(j) = A(i)A(i) = T1 To 910 - iA(j) > A(j + 1)T = A(j + 1)A(j + 1) = A(j)A(j) = T1 To 10Text3.Text = Text3.Text & A(i) & " "10T = A(i)ji - 1k + 11 To 10Text4.Text = Text4.Text & A(i) & " "实验4-6 二维数组的产生及输出1 To 41 To 5Int((9 - 0 + 1) * Rnd + 0)1 To 41 To 5Print A(i, j);Print1 To 41 To 5Picture1.Print A(i, j);Picture1.Print1 To 41 To 5Text1.Text = Text1.Text & A(i, j) & " "Text1.Text = Text1.Text & vbCrLf实验4-6 查找最大和最小元素及其位置1 To 31 To 4A(i, j) = Int((99 - 10 + 1) * Rnd + 10)Picture1.Print A(i, j);Picture1.PrintA(1, 1)， 1， 1A(1, 1)， 1， 1A(i, j)ijA(i, j) < minA(i, j)ij"最大元素" & "A(" & maxi & "," & maxj & ")=" & max "最小元素" & "A(" & mini & "," & minj & ")=" & min实验4-7 矩阵转置Dim A() As Integer"请输入N的值"ReDim A(N, N) As IntegerFor i = 1 To NFor j = 1 To NA(i, j) = Int((99 - 10 + 1) * Rnd + 10)Text1.Text = Text1.Text & A(i, j) & " "Next jText1.Text = Text1.Text & vbCrLfNext it = A(i, j)A(i, j) = A(j, i)A(j, i) = tFor i = 1 To NFor j = 1 To NText2.Text = Text2.Text & A(i, j) & " "Next jText2.Text = Text2.Text & vbCrLfNext i实验5 过程实验5-1 孪生素数和降序素数Dim i As IntegerFor i = 2 To N - 1If N Mod i = 0 Then Exit FunctionNext iPrime = TrueDim a As IntegerDim b As Integera = N \ 10b = N Mod 10If a > b ThenDecNumber = TrueElseDecNumber = FalseEnd If10 To 100Prime(i) = True And Prime(i + 2) = TrueList2.AddItem i & "和" & i + 2DecNumber(i) = True And Prime(i) = TrueList3.AddItem i实验5-2 求多项式和k = 1a = f(x, k)S + ak = k + 1Single As SingleDim i As Integer, a As Singlea = (x + 1) / xFor i = 2 To ka = a * (x + i) / ((2 * i - 1) * x)Next ia实验5-3 进制转换Asc(C) - Asc("A") + 10Left(S, k - 1)Mid(S, k + 1)Change(Mid(S2, i, 1)) * N ^ (0 - i)T1 + T2Tran(8, S)Tran(16, S)Not (C >= "0" And C <= "7" Or C >= "A" And C <= "F" Or C = ".")实验5-4 Armstrong数i As Long, a As Long, b As LongCombo1.Text实验5-5Option Base 1Dim a(5) As IntegerDim b(5) As Integerb(i) = i * i + 1Text2.Text = Text2.Text & b(i) & " "1 To 51 To 5Gcd(a(i), b(j)) = 1Gcd = KExit For实验5-6Create(a)Output(a)Sort(a)Output(a)GetMaxMin(a, MaxData, MinData)MaxDataMinDataAverage(a)Int((99 - 10 + 1) * Rnd + 10)1 To UBound(a)a(i);a(i) > a(j)t = a(j)a(j) = a(i)a(i) = t2 To UBound(a)a(i) > MM = a(i)a(i) < NN = a(i)s = s + a(i)Average = s / UBound(a)实验6 界面设计实验6-1 用户登陆MsgBox "请登录！"PassWordInput=TxtPassW.TextUserIdInput=UserId And PassWordInput=PassWordCmdReset_Click实验6-2 学籍登记OptXb(0).Value = TrueList1.AddItem Space(4) & xh & Space(6) & xm & Space(6) & xb & Space(12) & xy & Space(16) & zy & Space(4)List1.RemoveItem List1.ListIndex实验6-3 字体格式设置Select Case OpFontCheck2.Value = 1OpColor = IndexOpFont = Index实验6-4 兴趣调查List1.AddItem ItemEndSelect Case IndexItem = Text1.Text实验6-5 调色板。

第1套（1）在名称为Forml的窗体上添加一个名称为H1水平滚动条，请在属性窗口中设置它的属性值，满足下列要求：它的最小刻度值为1，最大刻度值为100，在程序运行时鼠标单击滚动条上滚动框以外的区域(不包括两边按钮)，滚动框移动10个刻度。

再在滚动条下面画两个名称分别为L1、L2的标签，并分别显示1、100，运行时的窗体如图所示。

注意：存盘时必须存放在考生文件夹下，工程文件名为sjt1.vbp，窗体文件名为sjt1.frm。

第2套（1）在名称为Form1的窗体上添加一个名称为L1的标签，标签上标题为"请输入密码"，添加一个名称为Text1的文本框，其宽、高分别为2000和300，设置适当的属性，使得在输入密码时，文本框中显示为"*"字符，此外再把窗体的标题设置为"密码窗口"，以上这些设置都必须在属性窗口中进行，程序运行时的窗体如图所示。

注意：存盘时必须存放在考生文件夹下，工程文件名保存为sjt1.vbp，窗体文件名保存为sjt1.frm。

第3套（1）在名称为Form1的窗体上添加两个名称分别为Text1和Text2的文本框，它们的高、宽分别为300、2400和1200、2400。

窗体的标题为"窗口"。

请通过属性窗口设置适当的属性，满足如下要求：①Text2可以显示多行文本，并且有垂直和水平两个滚动条；②程序运行时在Text1中显示输入的字符为"*"。

程序运行后的窗体如图所示。

注意：存盘时必须存放在考生文件夹下，工程文件名保存为sjt1.vbp，窗体文件名保存为sjt1.frm。

第4套（1）在名称为Form1的窗体上添加一个名称为Command1的命令按钮，标题为"打开文件"，再添加一个名称为CD1的通用对话框。

程序运行后，如果单击命令按钮，则弹出打开文件对话框，请按下列要求设置属性和编写代码：①设置适当属性，使对话框的标题为"打开文件"；②设置适当属性，使对话框的"文件类型"下拉式组合框中有两项可供选择："文本文件"、"所有文件"(如图所示)，默认的类型是"所有文件"；③编写命令按钮的事件过程，使得单击按钮可以弹出打开文件对话框。

实验4：编写一个程序。

要求在窗体内设置7个标签（Label）及7个文本框（TextBox），将每个标签的Text属性值设置为如下表达式。

在程序运行时，单击窗体空白区，可在对应的文本框中输出这些表达式的值。

1）8*3*6\22）7/6*3.2/2.15*(5.5+3.5)3）34\4+4.0^5/124）65\3 mod 3.4*fix(3.8)5）“abg”+”34” & “erert”6）true or not (8+3>=23)7）7>2 or 4<9实验目的：学习VB运算符的使用。

Public Class Form1Private Sub Form1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.ClickTextBox1.Text = 8 * 3 * 6 \ 2TextBox2.Text = 7 / 6 * 3.2 / 2.15 * (5.5 + 3.5)TextBox3.Text = 34 \ 4 + 4.0 ^ 5 / 12TextBox4.Text = 65 \ 3 Mod 3.4 * Fix(3.8)TextBox5.Text = """abg""" + """34""" & """erert"""TextBox6.Text = True Or Not (8 + 3)>= 23TextBox7.Text = 7 > 2 Or 4 < 9End SubEnd Class实验5：编写一个程序。

设a=2，b=3，c=4，d=5，S="ABCDEFGHI]K"，求下列表达式的值：(1) 5+(a+b)2(2) cos(b)(sin(a)+1) (3) 8e3ln2(4) Left(S,4) (5) Mid(S, 3,4) (6) Instr(S, "EFG")(7) Lcase(Right(S, 5)) (8) Len(Mid((S, 3)实验目的：学习VB中函数的使用。

习题一答案在教材上找。

习题二1.对象指现实世界中的实体。

每个对象有自己的特征(属性)、行为(方法)和发生在该对象上的活动(事件)。

类是对同一种对象的集合与抽象。

类包含所创建对象的属性数据，以及对这些数据进行操作的方法。

封装和隐藏是类的重要特性，将数据结构和对数据的操作封装在一起，类的内部实现细节对用户来说是透明的。

VB工具箱中的可视图标是VB系统设计好的标准控件类。

通过将控件类实例化，得到真正的控件对象。

在窗体上画一个控件，就将类转换为对象，创建了一个控件对象。

VB中常用的对象是控件。

此外，VB还提供了系统对象。

窗体是个特例，它既是类也是对象。

当向一个工程添加一个新窗体时，实质就由窗体类创建了一个窗体对象。

对象的三要素：属性、事件和方法。

属性：存放对象的数据(决定对象外观及功能)对象属性的设置方法：在设计阶段，利用属性窗口直接设置属性值；程序运行时，通过语句[对象名.]属性名=属性值。

若属性只能在设计阶段设置，在程序运行阶段不可改变，称为只读属性。

事件：发生在对象上的事情。

同一事件，对不同的对象，会引发不同的反应。

事件过程：应用程序处理事件的步骤。

应用程序设计的主要工作就是为对象编写事件过程的代码。

方法：面向对象的程序设计语言，为程序设计人员提供了一种特殊的过程和函数。

方法是面向对象的，调用时一定要指明对象。

2.窗体和控件具有的基本属性“(1) Name属性：名称所创建的对象名称,在程序中引用。

(2) Caption属性：标题该属性决定了对象上显示的内容。

(3) Height、Width、Top和Left属性决定对象的大小和位置。

(4) Enabled 属性：对象是否允许操作(5) Visible 属性：对象是否可见(6) Font 属性组：文本的外观FontName字体、FontSize大小FontBold粗体、FontItalic斜体FontStrikethru 删除线FontUnderline 下划线(7) ForeColor属性：前景颜色(8) BackColor属性：背景颜色(9) MousePointer属性：鼠标指针类型, 设置值范围0～15，由系统指定。

vb课后习题参考答案第一章习题参考答案一、填空题1、对象事件驱动2、编译运行模式解释运行模式二、简答题1、简述VB的特点。

答：①可视化的程序设计方法②面向对象的程序设计思想③事件驱动的编程机制④结构化的程序设计语言⑤高度的可扩充性⑥强大的数据库访问能力⑦支持动态数据交换⑧支持对象链接与嵌入2、简述VB的安装过程。

答：①向光驱中放入VB安装光盘；②计算机将运行自动安装程序，若没有，执行VB目录下的Setup.exe；③根据提示逐一回答问题，并点击“下一步”；④点击“完成”；2、如何启动VB。

答：三种方法：①单击“开始”按钮，选择“程序”菜单下的“Microsoft Visual Basic 6.0 中文版”菜单项并单击；②双击桌面上的VB6.0快捷图标；③在“开始”菜单的运行对话框中输入命令来启动VB；第二章习题参考答案一、选择题：1-10、DCACD BCBBC11-20、BADCA BBAAB21-29、AACBB CDDC二、填空题1．窗体、控件2．属性值3．属性窗口设置、代码窗口设置4．事件过程5．对象名、下划线、事件名6．Form_Click第三章习题参考答案一、选择题1、B2、C3、A4、B5、A6、C7、C二、填空题1、11字符型、字节型、整型、长整型、单精度型、双精度型、货币型、逻辑型、日期型、对象型、变体型。

String、Byte、Integer、Long、Single、Double、Currency、Boolean、Date、Object、Variant2、双引号(英文)、#3、ASCII、1、25、&、+、+6、Now()、Time、日期型三、解答题1、(3)2、(1 )3、（1）常量（关键字）（2）字符型常量（3）逻辑型常量（4）变量（5）字符串常量（6）变量（7）字符串常量（8）变量（9）日期型常量（题目应是#11/16/1999#）（10）数值型常量（单精度）4、315、（1）(1+y/x)/(1-y/x) （2）x^3+3*x*y/(2-y)（3）sqr(abs(a*b-c^3)) （4）sqr(s*(s-a)*(s-b)*(s-c))6、7、（1）13 （2）17（3）#1999-11-12# （4）zxy123ABC8、（1）19 （2）8.16666666666667（3）5．25 （4）29、（1）-4 （2）2 . 82842712474619 （3）-3 （4）49 （5）”hello” （6）He7）16 （8）“-459.65” （9）510、（4）11、（2）12、（4）第四章习题参考答案一、选择题：1—7: DAABBCD二、填空题1．500.00%2．将字号扩大为原来的二倍3． B三、编程题（略）1．文本框、标签和命令按钮的名称分别为text1、label1、command1Private Sub Command1_Click()Label1.caption=text1.textCommand1.caption=text1.textEnd Sub2．单价、数量、折扣和应付款对应的文本框的名称分别为：text1、text2、text3和text4，计算和清除命令按钮的名称分别为：command1和command2。